diff --git a/rust/Cargo.lock b/rust/Cargo.lock
index 59153fd0..961c7b5a 100644
--- a/rust/Cargo.lock
+++ b/rust/Cargo.lock
@@ -8,56 +8,6 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "320119579fcad9c21884f5c4861d16174d0e06250625266f50fe6898340abefa"
 
-[[package]]
-name = "agent-client-protocol"
-version = "2.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13f780597b2c88ab83d02509bcc3e86366751f86fa12114005e35c55ed691763"
-dependencies = [
- "agent-client-protocol-derive",
- "agent-client-protocol-schema",
- "async-io",
- "async-process",
- "blocking",
- "futures",
- "futures-concurrency",
- "rustc-hash 2.1.3",
- "rustix 1.1.5",
- "schemars 1.2.2",
- "serde",
- "serde_json",
- "shell-words",
- "tracing",
- "uuid",
- "windows-sys 0.61.2",
-]
-
-[[package]]
-name = "agent-client-protocol-derive"
-version = "2.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f4893bfb11e0e193aa5a64611a126ee87567acb1879556519c902722899229de"
-dependencies = [
- "quote",
- "syn 3.0.3",
-]
-
-[[package]]
-name = "agent-client-protocol-schema"
-version = "1.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d595a79e1665d02c91c7dd1bedd118501e75cc0a3d5b1651b5150ec4c5c1e0d"
-dependencies = [
- "anyhow",
- "derive_more",
- "schemars 1.2.2",
- "serde",
- "serde_json",
- "serde_with",
- "strum",
- "tracing",
-]
-
 [[package]]
 name = "aho-corasick"
 version = "1.1.5"
@@ -88,12 +38,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "anyhow"
-version = "1.0.104"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "330a5ed07fa54e4702c9d6c4174f74427fc0ef6e214bbd677ae50a5099946470"
-
 [[package]]
 name = "arbitrary"
 version = "1.4.2"
@@ -103,89 +47,6 @@ dependencies = [
  "derive_arbitrary",
 ]
 
-[[package]]
-name = "async-channel"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "924ed96dd52d1b75e9c1a3e6275715fd320f5f9439fb5a4a11fa51f4221158d2"
-dependencies = [
- "concurrent-queue",
- "event-listener-strategy",
- "futures-core",
- "pin-project-lite",
-]
-
-[[package]]
-name = "async-io"
-version = "2.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "456b8a8feb6f42d237746d4b3e9a178494627745c3c56c6ea55d92ba50d026fc"
-dependencies = [
- "autocfg",
- "cfg-if",
- "concurrent-queue",
- "futures-io",
- "futures-lite",
- "parking",
- "polling",
- "rustix 1.1.5",
- "slab",
- "windows-sys 0.61.2",
-]
-
-[[package]]
-name = "async-lock"
-version = "3.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "290f7f2596bd5b78a9fec8088ccd89180d7f9f55b94b0576823bbbdc72ee8311"
-dependencies = [
- "event-listener",
- "event-listener-strategy",
- "pin-project-lite",
-]
-
-[[package]]
-name = "async-process"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fc50921ec0055cdd8a16de48773bfeec5c972598674347252c0399676be7da75"
-dependencies = [
- "async-channel",
- "async-io",
- "async-lock",
- "async-signal",
- "async-task",
- "blocking",
- "cfg-if",
- "event-listener",
- "futures-lite",
- "rustix 1.1.5",
-]
-
-[[package]]
-name = "async-signal"
-version = "0.2.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "52b5aaafa020cf5053a01f2a60e8ff5dccf550f0f77ec54a4e47285ac2bab485"
-dependencies = [
- "async-io",
- "async-lock",
- "atomic-waker",
- "cfg-if",
- "futures-core",
- "futures-io",
- "rustix 1.1.5",
- "signal-hook-registry",
- "slab",
- "windows-sys 0.61.2",
-]
-
-[[package]]
-name = "async-task"
-version = "4.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b75356056920673b02621b35afd0f7dda9306d03c79a30f5c56c44cf256e3de"
-
 [[package]]
 name = "atomic-waker"
 version = "1.1.2"
@@ -256,47 +117,12 @@ version = "0.22.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
 
-[[package]]
-name = "base64"
-version = "0.23.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac07cdecf99051d9a5238b80f35af32cdeba5b336e55d957b318b50137e18da5"
-
 [[package]]
 name = "base64ct"
 version = "1.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2af50177e190e07a26ab74f8b1efbfe2ef87da2116221318cb1c2e82baf7de06"
 
-[[package]]
-name = "bindgen"
-version = "0.69.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "271383c67ccabffb7381723dea0672a673f292304fcb45c01cc648c7a8d58088"
-dependencies = [
- "bitflags 2.13.1",
- "cexpr",
- "clang-sys",
- "itertools",
- "lazy_static",
- "lazycell",
- "log",
- "prettyplease",
- "proc-macro2",
- "quote",
- "regex",
- "rustc-hash 1.1.0",
- "shlex 1.3.0",
- "syn 2.0.119",
- "which",
-]
-
-[[package]]
-name = "bitflags"
-version = "1.3.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
-
 [[package]]
 name = "bitflags"
 version = "2.13.1"
@@ -312,28 +138,6 @@ dependencies = [
  "generic-array",
 ]
 
-[[package]]
-name = "blocking"
-version = "1.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a70e4329df6cb94385eed412ec92375c3cdd8a6e502493d1229b6414e4036dfa"
-dependencies = [
- "async-channel",
- "async-task",
- "futures-io",
- "futures-lite",
- "piper",
-]
-
-[[package]]
-name = "bs58"
-version = "0.5.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bf88ba1141d185c399bee5288d850d63b8369520c1eafc32a0430b5b6c287bf4"
-dependencies = [
- "tinyvec",
-]
-
 [[package]]
 name = "bstr"
 version = "1.13.1"
@@ -372,16 +176,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5d262e149917187838d5b42777c8253bcb64500067342904e7d429499a6f277e"
 dependencies = [
  "find-msvc-tools",
- "shlex 2.0.1",
-]
-
-[[package]]
-name = "cexpr"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6fac387a98bb7c37292057cffc56d62ecb629900026402633ae9160df93a8766"
-dependencies = [
- "nom",
+ "shlex",
 ]
 
 [[package]]
@@ -419,17 +214,6 @@ dependencies = [
  "windows-link",
 ]
 
-[[package]]
-name = "clang-sys"
-version = "1.9.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "157a8ba7b480713b56f4c09fd13fc3e0a22a5dfab8097ba61cbc5feef950788a"
-dependencies = [
- "glob",
- "libc",
- "libloading",
-]
-
 [[package]]
 name = "comrak"
 version = "0.54.0"
@@ -443,35 +227,17 @@ dependencies = [
  "jetscii",
  "phf",
  "phf_codegen",
- "rustc-hash 2.1.3",
+ "rustc-hash",
  "smallvec",
  "typed-arena",
 ]
 
-[[package]]
-name = "concurrent-queue"
-version = "2.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4ca0197aee26d1ae37445ee532fefce43251d24cc7c166799f4d46817f1d3973"
-dependencies = [
- "crossbeam-utils",
-]
-
 [[package]]
 name = "const-oid"
 version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2459377285ad874054d797f3ccebf984978aa39129f6eafde5cdc8315b612f8"
 
-[[package]]
-name = "convert_case"
-version = "0.10.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "633458d4ef8c78b72454de2d54fd6ab2e60f9e02be22f3c6104cdc8a4e0fceb9"
-dependencies = [
- "unicode-segmentation",
-]
-
 [[package]]
 name = "core-foundation-sys"
 version = "0.8.7"
@@ -557,77 +323,6 @@ dependencies = [
  "smallvec",
 ]
 
-[[package]]
-name = "darling"
-version = "0.23.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25ae13da2f202d56bd7f91c25fba009e7717a1e4a1cc98a76d844b65ae912e9d"
-dependencies = [
- "darling_core",
- "darling_macro",
-]
-
-[[package]]
-name = "darling_core"
-version = "0.23.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9865a50f7c335f53564bb694ef660825eb8610e0a53d3e11bf1b0d3df31e03b0"
-dependencies = [
- "ident_case",
- "proc-macro2",
- "quote",
- "strsim",
- "syn 2.0.119",
-]
-
-[[package]]
-name = "darling_macro"
-version = "0.23.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ac3984ec7bd6cfa798e62b4a642426a5be0e68f9401cfc2a01e3fa9ea2fcdb8d"
-dependencies = [
- "darling_core",
- "quote",
- "syn 2.0.119",
-]
-
-[[package]]
-name = "data-encoding"
-version = "2.11.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4583a4551df46e2792f82ceeac45e850d2e2d5debba0b91f102385cda5b11f06"
-
-[[package]]
-name = "defmt"
-version = "1.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e2953bfe4f93bbd20cc71198842756f77d161884c99ebbabc41d80231ded88d1"
-dependencies = [
- "bitflags 1.3.2",
- "defmt-macros",
-]
-
-[[package]]
-name = "defmt-macros"
-version = "1.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bad9c72e7ca2137e0dc3813245a0d282fd6daad32fd800af018306a9169b5fe8"
-dependencies = [
- "defmt-parser",
- "proc-macro2",
- "quote",
- "syn 2.0.119",
-]
-
-[[package]]
-name = "defmt-parser"
-version = "1.0.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "10d60334b3b2e7c9d91ef8150abfb6fa4c1c39ebbcf4a81c2e346aad939fee3e"
-dependencies = [
- "thiserror",
-]
-
 [[package]]
 name = "der"
 version = "0.7.10"
@@ -639,15 +334,6 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "deranged"
-version = "0.5.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7cd812cc2bc1d69d4764bd80df88b4317eaef9e773c75226407d9bc0876b211c"
-dependencies = [
- "serde_core",
-]
-
 [[package]]
 name = "derive_arbitrary"
 version = "1.4.2"
@@ -659,29 +345,6 @@ dependencies = [
  "syn 2.0.119",
 ]
 
-[[package]]
-name = "derive_more"
-version = "2.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d751e9e49156b02b44f9c1815bcb94b984cdcc4396ecc32521c739452808b134"
-dependencies = [
- "derive_more-impl",
-]
-
-[[package]]
-name = "derive_more-impl"
-version = "2.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "799a97264921d8623a957f6c3b9011f3b5492f557bbb7a5a19b7fa6d06ba8dcb"
-dependencies = [
- "convert_case",
- "proc-macro2",
- "quote",
- "rustc_version",
- "syn 2.0.119",
- "unicode-xid",
-]
-
 [[package]]
 name = "digest"
 version = "0.10.7"
@@ -725,12 +388,6 @@ version = "1.0.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0881ea181b1df73ff77ffaaf9c7544ecc11e82fba9b5f27b262a3c73a332555"
 
-[[package]]
-name = "either"
-version = "1.17.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e5e8f6c15a24b9a3ee5efec809ccd006d3b30e8b3bb63c39af737c7f87daa1d"
-
 [[package]]
 name = "emojis"
 version = "0.8.2"
@@ -776,26 +433,6 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "event-listener"
-version = "5.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5a23add41df1562121a9393cb065eab5146a1242410f23a644851e90cfd669d2"
-dependencies = [
- "parking",
- "pin-project-lite",
-]
-
-[[package]]
-name = "event-listener-strategy"
-version = "0.5.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8be9f3dfaaffdae2972880079a491a1a8bb7cbed0b8dd7a347f668b4150a3b93"
-dependencies = [
- "event-listener",
- "pin-project-lite",
-]
-
 [[package]]
 name = "fastrand"
 version = "2.5.0"
@@ -814,12 +451,6 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9844ddc3a6e533d62bba727eb6c28b5d360921d5175e9ff0f1e621a5c590a4d5"
 
-[[package]]
-name = "fixedbitset"
-version = "0.5.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1d674e81391d1e1ab681a28d99df07927c6d4aa5b027d7da16ba32d1d21ecd99"
-
 [[package]]
 name = "flate2"
 version = "1.1.9"
@@ -874,19 +505,6 @@ dependencies = [
  "futures-sink",
 ]
 
-[[package]]
-name = "futures-concurrency"
-version = "7.7.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "175cd8cca9e1d45b87f18ffa75088f2099e3c4fe5e2f83e42de112560bea8ea6"
-dependencies = [
- "fixedbitset",
- "futures-core",
- "futures-lite",
- "pin-project",
- "smallvec",
-]
-
 [[package]]
 name = "futures-core"
 version = "0.3.34"
@@ -910,19 +528,6 @@ version = "0.3.34"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "53c0fa8157de1303bfffdaa1cc2a673bfffb60102f76b0ef4441659124373fed"
 
-[[package]]
-name = "futures-lite"
-version = "2.6.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f78e10609fe0e0b3f4157ffab1876319b5b0db102a2c60dc4626306dc46b44ad"
-dependencies = [
- "fastrand",
- "futures-core",
- "futures-io",
- "parking",
- "pin-project-lite",
-]
-
 [[package]]
 name = "futures-macro"
 version = "0.3.34"
@@ -986,18 +591,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "getrandom"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "899def5c37c4fd7b2664648c28120ecec138e4d395b459e5ca34f9cce2dd77fd"
-dependencies = [
- "cfg-if",
- "libc",
- "r-efi 5.3.0",
- "wasip2",
-]
-
 [[package]]
 name = "getrandom"
 version = "0.4.3"
@@ -1007,17 +600,11 @@ dependencies = [
  "cfg-if",
  "js-sys",
  "libc",
- "r-efi 6.0.0",
+ "r-efi",
  "rand_core 0.10.1",
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "glob"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e4eba85ea1d0a966a983acd07deee566e67395d2d96b6fb39e62b5a833f1eb0b"
-
 [[package]]
 name = "globset"
 version = "0.4.21"
@@ -1031,45 +618,12 @@ dependencies = [
  "regex-syntax",
 ]
 
-[[package]]
-name = "hashbrown"
-version = "0.12.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
-
 [[package]]
 name = "hashbrown"
 version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed5909b6e89a2db4456e54cd5f673791d7eca6732202bbf2a9cc504fe2f9b84a"
 
-[[package]]
-name = "heck"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
-
-[[package]]
-name = "hermit-abi"
-version = "0.5.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e17592d60ebacc7d5e169f4663c5f84f9161cc90328abcfe8456f41e4dfcb284"
-
-[[package]]
-name = "hex"
-version = "0.4.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
-
-[[package]]
-name = "home"
-version = "0.5.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc627f471c528ff0c4a49e1d5e60450c8f6461dd6d10ba9dcd3a61d3dff7728d"
-dependencies = [
- "windows-sys 0.61.2",
-]
-
 [[package]]
 name = "html5ever"
 version = "0.39.0"
@@ -1168,7 +722,7 @@ version = "0.1.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "96547c2556ec9d12fb1578c4eaf448b04993e7fb79cbaad930a656880a6bdfa0"
 dependencies = [
- "base64 0.22.1",
+ "base64",
  "bytes",
  "futures-channel",
  "futures-util",
@@ -1197,7 +751,7 @@ dependencies = [
  "js-sys",
  "log",
  "wasm-bindgen",
- "windows-core 0.62.2",
+ "windows-core",
 ]
 
 [[package]]
@@ -1291,12 +845,6 @@ dependencies = [
  "zerovec",
 ]
 
-[[package]]
-name = "ident_case"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9e0384b61958566e926dc50660321d12159025e767c18e043daf26b70104c39"
-
 [[package]]
 name = "idna"
 version = "1.1.0"
@@ -1334,17 +882,6 @@ dependencies = [
  "winapi-util",
 ]
 
-[[package]]
-name = "indexmap"
-version = "1.9.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bd070e393353796e801d209ad339e89596eb4c8d430d18ede6a1cced8fafbd99"
-dependencies = [
- "autocfg",
- "hashbrown 0.12.3",
- "serde",
-]
-
 [[package]]
 name = "indexmap"
 version = "2.14.0"
@@ -1352,7 +889,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d466e9454f08e4a911e14806c24e16fba1b4c121d1ea474396f396069cf949d9"
 dependencies = [
  "equivalent",
- "hashbrown 0.17.1",
+ "hashbrown",
  "serde",
  "serde_core",
 ]
@@ -1363,15 +900,6 @@ version = "2.12.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6a756c3fac73139e83f14c2d742155dd2b78d3ee56597b419a0579b7bdd6dd78"
 
-[[package]]
-name = "itertools"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba291022dbbd398a455acf126c1e341954079855bc60dfdda641363bd6922569"
-dependencies = [
- "either",
-]
-
 [[package]]
 name = "itoa"
 version = "1.0.18"
@@ -1384,59 +912,6 @@ version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "47f142fe24a9c9944451e8349de0a56af5f3e7226dc46f3ed4d4ecc0b85af75e"
 
-[[package]]
-name = "jiff"
-version = "0.2.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "668b7183bd07af9a4885f5c35b0cc5c83c4607a913c16b7e17291832910d2dcc"
-dependencies = [
- "defmt",
- "jiff-core",
- "jiff-static",
- "jiff-tzdb-platform",
- "log",
- "portable-atomic",
- "portable-atomic-util",
- "serde_core",
- "windows-link",
-]
-
-[[package]]
-name = "jiff-core"
-version = "0.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7feca88439efe53da3754500c1851dedf3cb36c524dd5cf8225cc0794de95d09"
-dependencies = [
- "defmt",
-]
-
-[[package]]
-name = "jiff-static"
-version = "0.2.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3a69dcb3a21cfb32ce1cd056169337ca284af0766dd766e7878819b251a49204"
-dependencies = [
- "jiff-core",
- "proc-macro2",
- "quote",
- "syn 2.0.119",
-]
-
-[[package]]
-name = "jiff-tzdb"
-version = "0.1.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "142bd39932ad231f10513df9ab62661fead8719872150b7ad02a2df79f4e141e"
-
-[[package]]
-name = "jiff-tzdb-platform"
-version = "0.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "875a5a69ac2bab1a891711cf5eccbec1ce0341ea805560dcd90b7a2e925132e8"
-dependencies = [
- "jiff-tzdb",
-]
-
 [[package]]
 name = "js-sys"
 version = "0.3.104"
@@ -1448,19 +923,6 @@ dependencies = [
  "wasm-bindgen",
 ]
 
-[[package]]
-name = "kill_tree"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3879339076ac4da142cc852d91693462927cbc99773b5ea422e4834e68c4ff2"
-dependencies = [
- "bindgen",
- "nix",
- "tokio",
- "tracing",
- "windows 0.52.0",
-]
-
 [[package]]
 name = "lazy_static"
 version = "1.5.0"
@@ -1470,94 +932,34 @@ dependencies = [
  "spin",
 ]
 
-[[package]]
-name = "lazycell"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
-
 [[package]]
 name = "libc"
 version = "0.2.189"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3eaf3ede3fee6db1a4c2ee091bf8a8b4dccdc6d17f656fb07896ee72867612f2"
 
-[[package]]
-name = "libloading"
-version = "0.8.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7c4b02199fee7c5d21a5ae7d8cfa79a6ef5bb2fc834d6e9058e89c825efdc55"
-dependencies = [
- "cfg-if",
- "windows-link",
-]
-
 [[package]]
 name = "libm"
 version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6d2cec3eae94f9f509c767b45932f1ada8350c4bdb85af2fcab4a3c14807981"
 
-[[package]]
-name = "linux-raw-sys"
-version = "0.4.15"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d26c52dbd32dccf2d10cac7725f8eae5296885fb5703b261f7d0a0739ec807ab"
-
-[[package]]
-name = "linux-raw-sys"
-version = "0.12.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53"
-
 [[package]]
 name = "litemap"
 version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "92daf443525c4cce67b150400bc2316076100ce0b3686209eb8cf3c31612e6f0"
 
-[[package]]
-name = "lithe-agent-host"
-version = "0.1.0"
-dependencies = [
- "agent-client-protocol",
- "bytes",
- "flate2",
- "fs2",
- "futures",
- "http",
- "http-body-util",
- "hyper",
- "hyper-util",
- "kill_tree",
- "libc",
- "reqwest",
- "rmcp",
- "semver",
- "serde",
- "serde_json",
- "serde_yaml_ng",
- "sha2",
- "sse-stream",
- "tokio",
- "tokio-util",
- "tungstenite",
- "url",
- "uuid",
- "windows-sys 0.61.2",
-]
-
 [[package]]
 name = "lithe-core"
 version = "0.1.0"
 dependencies = [
  "ammonia",
- "base64 0.22.1",
+ "base64",
  "chrono",
  "comrak",
  "encoding_rs",
  "ignore",
- "lithe-agent-host",
  "lithe-core-rules",
  "lithe-git-host",
  "lithe-ide-host",
@@ -1621,7 +1023,7 @@ dependencies = [
 name = "lithe-remote"
 version = "0.1.0"
 dependencies = [
- "base64 0.22.1",
+ "base64",
  "libc",
  "serde",
  "serde_json",
@@ -1685,12 +1087,6 @@ version = "0.3.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6877bb514081ee2a7ff5ef9de3281f14a4dd4bceac4c09388074a6b5df8a139a"
 
-[[package]]
-name = "minimal-lexical"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
-
 [[package]]
 name = "miniz_oxide"
 version = "0.8.9"
@@ -1724,27 +1120,6 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "650eef8c711430f1a879fdd01d4745a7deea475becfb90269c06775983bbf086"
 
-[[package]]
-name = "nix"
-version = "0.27.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2eb04e9c688eff1c89d72b407f168cf79bb9e867a9d3323ed6c01519eb9cc053"
-dependencies = [
- "bitflags 2.13.1",
- "cfg-if",
- "libc",
-]
-
-[[package]]
-name = "nom"
-version = "7.1.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
-dependencies = [
- "memchr",
- "minimal-lexical",
-]
-
 [[package]]
 name = "num-bigint-dig"
 version = "0.8.6"
@@ -1761,12 +1136,6 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "num-conv"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "521739c6d2bac4aa25192232afe6841231376b2b26d4d9fae5ecf8ca5772e441"
-
 [[package]]
 name = "num-integer"
 version = "0.1.47"
@@ -1817,7 +1186,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3e0adef53c21f888deb4fa59fc59f7eb17404926ee8a6f59f5df0fd7f9f3272"
 dependencies = [
- "bitflags 2.13.1",
+ "bitflags",
  "objc2",
 ]
 
@@ -1827,12 +1196,6 @@ version = "1.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
 
-[[package]]
-name = "parking"
-version = "2.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f38d5652c16fde515bb1ecef450ab0f6a219d619a7274976324d5e377f7dceba"
-
 [[package]]
 name = "parking_lot"
 version = "0.12.5"
@@ -1916,43 +1279,12 @@ dependencies = [
  "siphasher",
 ]
 
-[[package]]
-name = "pin-project"
-version = "1.1.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2466b2336ed02bcdca6b294417127b90ec92038d1d5c4fbeac971a922e0e0924"
-dependencies = [
- "pin-project-internal",
-]
-
-[[package]]
-name = "pin-project-internal"
-version = "1.1.13"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c96395f0a926bc13b1c17622aaddda1ecb55d49c8f1bf9777e4d877800a43f8b"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.119",
-]
-
 [[package]]
 name = "pin-project-lite"
 version = "0.2.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd"
 
-[[package]]
-name = "piper"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c835479a4443ded371d6c535cbfd8d31ad92c5d23ae9770a61bc155e4992a3c1"
-dependencies = [
- "atomic-waker",
- "fastrand",
- "futures-io",
-]
-
 [[package]]
 name = "pkcs1"
 version = "0.7.5"
@@ -1974,35 +1306,6 @@ dependencies = [
  "spki",
 ]
 
-[[package]]
-name = "polling"
-version = "3.11.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d0e4f59085d47d8241c88ead0f274e8a0cb551f3625263c05eb8dd897c34218"
-dependencies = [
- "cfg-if",
- "concurrent-queue",
- "hermit-abi",
- "pin-project-lite",
- "rustix 1.1.5",
- "windows-sys 0.61.2",
-]
-
-[[package]]
-name = "portable-atomic"
-version = "1.15.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05c8b63e8d9609db387f0324918f81d68fe27748f084ef092fb35954d0539a85"
-
-[[package]]
-name = "portable-atomic-util"
-version = "0.2.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2a106d1259c23fac8e543272398ae0e3c0b8d33c88ed73d0cc71b0f1d902618"
-dependencies = [
- "portable-atomic",
-]
-
 [[package]]
 name = "potential_utf"
 version = "0.1.5"
@@ -2012,12 +1315,6 @@ dependencies = [
  "zerovec",
 ]
 
-[[package]]
-name = "powerfmt"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "439ee305def115ba05938db6eb1644ff94165c5ab5e9420d1c1bcedbba909391"
-
 [[package]]
 name = "ppv-lite86"
 version = "0.2.21"
@@ -2033,16 +1330,6 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 
-[[package]]
-name = "prettyplease"
-version = "0.2.37"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
-dependencies = [
- "proc-macro2",
- "syn 2.0.119",
-]
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.107"
@@ -2072,7 +1359,7 @@ dependencies = [
  "pin-project-lite",
  "quinn-proto",
  "quinn-udp",
- "rustc-hash 2.1.3",
+ "rustc-hash",
  "rustls",
  "socket2",
  "thiserror",
@@ -2093,7 +1380,7 @@ dependencies = [
  "rand 0.10.2",
  "rand_pcg",
  "ring",
- "rustc-hash 2.1.3",
+ "rustc-hash",
  "rustls",
  "rustls-pki-types",
  "slab",
@@ -2126,12 +1413,6 @@ dependencies = [
  "proc-macro2",
 ]
 
-[[package]]
-name = "r-efi"
-version = "5.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69cdb34c158ceb288df11e18b4bd39de994f6657d83847bdffdbd7f346754b0f"
-
 [[package]]
 name = "r-efi"
 version = "6.0.0"
@@ -2145,20 +1426,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "22f6172bdec972074665ed81ed53b71da00bfc44b65a753cfde883ec4c702a1a"
 dependencies = [
  "libc",
- "rand_chacha 0.3.1",
+ "rand_chacha",
  "rand_core 0.6.4",
 ]
 
-[[package]]
-name = "rand"
-version = "0.9.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b9ef1d0d795eb7d84685bca4f72f3649f064e6641543d3a8c415898726a57b41"
-dependencies = [
- "rand_chacha 0.9.0",
- "rand_core 0.9.5",
-]
-
 [[package]]
 name = "rand"
 version = "0.10.2"
@@ -2180,16 +1451,6 @@ dependencies = [
  "rand_core 0.6.4",
 ]
 
-[[package]]
-name = "rand_chacha"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d3022b5f1df60f26e1ffddd6c66e8aa15de382ae63b3a0c1bfc0e4d3e3f325cb"
-dependencies = [
- "ppv-lite86",
- "rand_core 0.9.5",
-]
-
 [[package]]
 name = "rand_core"
 version = "0.6.4"
@@ -2199,15 +1460,6 @@ dependencies = [
  "getrandom 0.2.17",
 ]
 
-[[package]]
-name = "rand_core"
-version = "0.9.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76afc826de14238e6e8c374ddcc1fa19e374fd8dd986b0d2af0d02377261d83c"
-dependencies = [
- "getrandom 0.3.4",
-]
-
 [[package]]
 name = "rand_core"
 version = "0.10.1"
@@ -2229,7 +1481,7 @@ version = "0.5.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d"
 dependencies = [
- "bitflags 2.13.1",
+ "bitflags",
 ]
 
 [[package]]
@@ -2287,7 +1539,7 @@ version = "0.12.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eddd3ca559203180a307f12d114c268abf583f59b03cb906fd0b3ff8646c1147"
 dependencies = [
- "base64 0.22.1",
+ "base64",
  "bytes",
  "futures-channel",
  "futures-core",
@@ -2311,14 +1563,12 @@ dependencies = [
  "sync_wrapper",
  "tokio",
  "tokio-rustls",
- "tokio-util",
  "tower",
  "tower-http",
  "tower-service",
  "url",
  "wasm-bindgen",
  "wasm-bindgen-futures",
- "wasm-streams",
  "web-sys",
  "webpki-roots",
 ]
@@ -2343,21 +1593,16 @@ version = "3.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fae7019994ae0fe4ada40b732f798f3ff26f0f04facb1477f1bf37eb4f18a2d3"
 dependencies = [
- "base64 0.23.1",
- "bytes",
  "chrono",
  "futures",
- "http",
- "indexmap 2.14.0",
+ "indexmap",
  "pastey",
  "pin-project-lite",
- "schemars 1.2.2",
+ "schemars",
  "serde",
  "serde_json",
- "sse-stream",
  "thiserror",
  "tokio",
- "tokio-stream",
  "tokio-util",
  "tracing",
  "uuid",
@@ -2383,53 +1628,12 @@ dependencies = [
  "zeroize",
 ]
 
-[[package]]
-name = "rustc-hash"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
-
 [[package]]
 name = "rustc-hash"
 version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6b1e7f9a428571be2dc5bc0505c13fb6bf936822b894ec87abf8a08a4e51742d"
 
-[[package]]
-name = "rustc_version"
-version = "0.4.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cfcb3a22ef46e85b45de6ee7e79d063319ebb6594faafcf1c225ea92ab6e9b92"
-dependencies = [
- "semver",
-]
-
-[[package]]
-name = "rustix"
-version = "0.38.44"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fdb5bc1ae2baa591800df16c9ca78619bf65c0488b41b96ccec5d11220d8c154"
-dependencies = [
- "bitflags 2.13.1",
- "errno",
- "libc",
- "linux-raw-sys 0.4.15",
- "windows-sys 0.52.0",
-]
-
-[[package]]
-name = "rustix"
-version = "1.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "891efababe418670775f199f0d233d84843c227a0949a883ce15b37c78d6629d"
-dependencies = [
- "bitflags 2.13.1",
- "errno",
- "libc",
- "linux-raw-sys 0.12.1",
- "windows-sys 0.61.2",
-]
-
 [[package]]
 name = "rustls"
 version = "0.23.43"
@@ -2486,18 +1690,6 @@ dependencies = [
  "winapi-util",
 ]
 
-[[package]]
-name = "schemars"
-version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4cd191f9397d57d581cddd31014772520aa448f65ef991055d7f61582c65165f"
-dependencies = [
- "dyn-clone",
- "ref-cast",
- "serde",
- "serde_json",
-]
-
 [[package]]
 name = "schemars"
 version = "1.2.2"
@@ -2530,12 +1722,6 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
-[[package]]
-name = "semver"
-version = "1.0.28"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a7852d02fc848982e0c167ef163aaff9cd91dc640ba85e263cb1ce46fae51cd"
-
 [[package]]
 name = "serde"
 version = "1.0.229"
@@ -2583,7 +1769,7 @@ version = "1.0.151"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c841b55ecdae098c80dcae9cf767f6f8a0c2cdb3416bbef72181df4d0fe73f14"
 dependencies = [
- "indexmap 2.14.0",
+ "indexmap",
  "itoa",
  "memchr",
  "serde",
@@ -2623,46 +1809,13 @@ dependencies = [
  "serde",
 ]
 
-[[package]]
-name = "serde_with"
-version = "3.22.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ee78f1fbe43ac4a0e47aadb3dbd357b69eb0d3793e948624cd03dd2750ab1c0a"
-dependencies = [
- "base64 0.22.1",
- "bs58",
- "chrono",
- "hex",
- "indexmap 1.9.3",
- "indexmap 2.14.0",
- "jiff",
- "schemars 0.9.0",
- "schemars 1.2.2",
- "serde_core",
- "serde_json",
- "serde_with_macros",
- "time",
-]
-
-[[package]]
-name = "serde_with_macros"
-version = "3.22.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8705578779c2b6bd90d84d66eb2e206b708b1a4d7b9f17641b293545bf1c7e46"
-dependencies = [
- "darling",
- "proc-macro2",
- "quote",
- "syn 2.0.119",
-]
-
 [[package]]
 name = "serde_yaml_ng"
 version = "0.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b4db627b98b36d4203a7b458cf3573730f2bb591b28871d916dfa9efabfd41f"
 dependencies = [
- "indexmap 2.14.0",
+ "indexmap",
  "itoa",
  "ryu",
  "serde",
@@ -2697,12 +1850,6 @@ version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc6fe69c597f9c37bfeeeeeb33da3530379845f10be461a66d16d03eca2ded77"
 
-[[package]]
-name = "shlex"
-version = "1.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
-
 [[package]]
 name = "shlex"
 version = "2.0.1"
@@ -2794,19 +1941,6 @@ dependencies = [
  "der",
 ]
 
-[[package]]
-name = "sse-stream"
-version = "0.2.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c25ac7aff0abd1dbc474536e40416e1102c7dd9bfba0b9861c6d357f835dcfb4"
-dependencies = [
- "bytes",
- "futures-util",
- "http-body",
- "http-body-util",
- "pin-project-lite",
-]
-
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.1"
@@ -2843,33 +1977,6 @@ dependencies = [
  "quote",
 ]
 
-[[package]]
-name = "strsim"
-version = "0.11.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
-
-[[package]]
-name = "strum"
-version = "0.28.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9628de9b8791db39ceda2b119bbe13134770b56c138ec1d3af810d045c04f9bd"
-dependencies = [
- "strum_macros",
-]
-
-[[package]]
-name = "strum_macros"
-version = "0.28.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ab85eea0270ee17587ed4156089e10b9e6880ee688791d45a905f5b1ca36f664"
-dependencies = [
- "heck",
- "proc-macro2",
- "quote",
- "syn 2.0.119",
-]
-
 [[package]]
 name = "subtle"
 version = "2.6.1"
@@ -2947,36 +2054,6 @@ dependencies = [
  "syn 3.0.3",
 ]
 
-[[package]]
-name = "time"
-version = "0.3.55"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdb87b95ec50ddfa440816d227a17b2ccbdda963a316a727fda0fc4334f7d134"
-dependencies = [
- "deranged",
- "num-conv",
- "powerfmt",
- "serde_core",
- "time-core",
- "time-macros",
-]
-
-[[package]]
-name = "time-core"
-version = "0.1.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e1c906769ad99c88eaa54e728060edef082f8e358ff32030cb7c7d315e81109"
-
-[[package]]
-name = "time-macros"
-version = "0.2.32"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7e689342a48d2ea927c87ea50cabf8594854bf940e9310208848d680d668ed85"
-dependencies = [
- "num-conv",
- "time-core",
-]
-
 [[package]]
 name = "tinystr"
 version = "0.8.3"
@@ -3011,7 +2088,6 @@ dependencies = [
  "bytes",
  "libc",
  "mio",
- "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
  "socket2",
@@ -3040,17 +2116,6 @@ dependencies = [
  "tokio",
 ]
 
-[[package]]
-name = "tokio-stream"
-version = "0.1.19"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3d06f0b082ba57c26b79407372e57cf2a1e28124f78e9479fe80322cf53420b"
-dependencies = [
- "futures-core",
- "pin-project-lite",
- "tokio",
-]
-
 [[package]]
 name = "tokio-util"
 version = "0.7.19"
@@ -3059,7 +2124,6 @@ checksum = "494815d09bf52b5548659851081238f0ca39ff638363907596da739561c62c52"
 dependencies = [
  "bytes",
  "futures-core",
- "futures-io",
  "futures-sink",
  "libc",
  "pin-project-lite",
@@ -3094,7 +2158,7 @@ version = "0.25.13+spec-1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6975367e4d2ef766d86af01ffad14b622fecc8d4357a998fbc4deb6e9bacaf9b"
 dependencies = [
- "indexmap 2.14.0",
+ "indexmap",
  "toml_datetime",
  "toml_parser",
  "toml_writer",
@@ -3138,7 +2202,7 @@ version = "0.6.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4cfcf7e2740e6fc6d4d688b4ef00650406bb94adf4731e43c096c3a19fe40840"
 dependencies = [
- "bitflags 2.13.1",
+ "bitflags",
  "bytes",
  "futures-util",
  "http",
@@ -3209,7 +2273,7 @@ dependencies = [
  "percent-encoding",
  "scopeguard",
  "urlencoding",
- "windows 0.62.2",
+ "windows",
 ]
 
 [[package]]
@@ -3248,23 +2312,6 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b"
 
-[[package]]
-name = "tungstenite"
-version = "0.28.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8628dcc84e5a09eb3d8423d6cb682965dea9133204e8fb3efee74c2a0c259442"
-dependencies = [
- "bytes",
- "data-encoding",
- "http",
- "httparse",
- "log",
- "rand 0.9.5",
- "sha1",
- "thiserror",
- "utf-8",
-]
-
 [[package]]
 name = "typed-arena"
 version = "2.0.2"
@@ -3292,18 +2339,6 @@ dependencies = [
  "tinyvec",
 ]
 
-[[package]]
-name = "unicode-segmentation"
-version = "1.13.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6f5d3c3b1bf09027a88a6bc961fc00497d651009560b5463668dc81b0fa87a8"
-
-[[package]]
-name = "unicode-xid"
-version = "0.2.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
-
 [[package]]
 name = "unsafe-libyaml"
 version = "0.2.11"
@@ -3334,12 +2369,6 @@ version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "daf8dba3b7eb870caf1ddeed7bc9d2a049f3cfdfae7cb521b087cc33ae4c49da"
 
-[[package]]
-name = "utf-8"
-version = "0.7.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09cc8ee72d2a9becf2f2febe0205bbed8fc6615b7cb429ad062dc7b7ddd036a9"
-
 [[package]]
 name = "utf8_iter"
 version = "1.0.4"
@@ -3388,15 +2417,6 @@ version = "0.11.1+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ccf3ec651a847eb01de73ccad15eb7d99f80485de043efb2f370cd654f4ea44b"
 
-[[package]]
-name = "wasip2"
-version = "1.0.4+wasi-0.2.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b67efb37e106e55ce722a510d6b5f9c17f083e5fc79afc2badeb12cc313d9487"
-dependencies = [
- "wit-bindgen",
-]
-
 [[package]]
 name = "wasm-bindgen"
 version = "0.2.127"
@@ -3452,19 +2472,6 @@ dependencies = [
  "unicode-ident",
 ]
 
-[[package]]
-name = "wasm-streams"
-version = "0.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15053d8d85c7eccdbefef60f06769760a563c7f0a9d6902a13d35c7800b0ad65"
-dependencies = [
- "futures-util",
- "js-sys",
- "wasm-bindgen",
- "wasm-bindgen-futures",
- "web-sys",
-]
-
 [[package]]
 name = "web-sys"
 version = "0.3.104"
@@ -3506,18 +2513,6 @@ dependencies = [
  "rustls-pki-types",
 ]
 
-[[package]]
-name = "which"
-version = "4.4.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87ba24419a2078cd2b0f2ede2691b6c66d8e47836da3b6db8265ebad47afbfc7"
-dependencies = [
- "either",
- "home",
- "once_cell",
- "rustix 0.38.44",
-]
-
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -3549,16 +2544,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
-[[package]]
-name = "windows"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e48a53791691ab099e5e2ad123536d0fff50652600abaf43bbf952894110d0be"
-dependencies = [
- "windows-core 0.52.0",
- "windows-targets",
-]
-
 [[package]]
 name = "windows"
 version = "0.62.2"
@@ -3566,7 +2551,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "527fadee13e0c05939a6a05d5bd6eec6cd2e3dbd648b9f8e447c6518133d8580"
 dependencies = [
  "windows-collections",
- "windows-core 0.62.2",
+ "windows-core",
  "windows-future",
  "windows-numerics",
 ]
@@ -3577,16 +2562,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "23b2d95af1a8a14a3c7367e1ed4fc9c20e0a26e79551b1454d72583c97cc6610"
 dependencies = [
- "windows-core 0.62.2",
-]
-
-[[package]]
-name = "windows-core"
-version = "0.52.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "33ab640c8d7e35bf8ba19b884ba838ceb4fba93a4e8c65a9059d08afcfc683d9"
-dependencies = [
- "windows-targets",
+ "windows-core",
 ]
 
 [[package]]
@@ -3608,7 +2584,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e1d6f90251fe18a279739e78025bd6ddc52a7e22f921070ccdc67dde84c605cb"
 dependencies = [
- "windows-core 0.62.2",
+ "windows-core",
  "windows-link",
  "windows-threading",
 ]
@@ -3647,7 +2623,7 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6e2e40844ac143cdb44aead537bbf727de9b044e107a0f1220392177d15b0f26"
 dependencies = [
- "windows-core 0.62.2",
+ "windows-core",
  "windows-link",
 ]
 
@@ -3769,12 +2745,6 @@ dependencies = [
  "memchr",
 ]
 
-[[package]]
-name = "wit-bindgen"
-version = "0.57.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ebf944e87a7c253233ad6766e082e3cd714b5d03812acc24c318f549614536e"
-
 [[package]]
 name = "writeable"
 version = "0.6.3"
@@ -3895,7 +2865,7 @@ dependencies = [
  "crossbeam-utils",
  "displaydoc",
  "flate2",
- "indexmap 2.14.0",
+ "indexmap",
  "memchr",
  "thiserror",
  "zopfli",
diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index 536f3c98..092d56cb 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,5 +1,5 @@
 [workspace]
-members = ["lithe-core", "lithe-core-rules", "lithe-git-host", "lithe-agent-host", "lithe-ide-host", "lithe-remote"]
+members = ["lithe-core", "lithe-core-rules", "lithe-git-host", "lithe-ide-host", "lithe-remote"]
 resolver = "2"
 
 [profile.release]
diff --git a/rust/contracts/agent-turn-policy.json b/rust/contracts/agent-turn-policy.json
deleted file mode 100644
index 032151c7..00000000
--- a/rust/contracts/agent-turn-policy.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-  "quietNoticeMilliseconds": 300000
-}
diff --git a/rust/contracts/rust-core-api.md b/rust/contracts/rust-core-api.md
index 80c840d4..6325eabd 100644
--- a/rust/contracts/rust-core-api.md
+++ b/rust/contracts/rust-core-api.md
@@ -224,9 +224,6 @@ int32_t lithe_core_cancel(const char *operation_id);
 void lithe_core_free_string(char *value);
 void lithe_core_install_log_waker(void (*callback)(void *), void *context);
 int32_t lithe_core_remove_log_waker(void *context);
-void *lithe_agent_open_json(const char *configuration, void (*callback)(const char *, void *), void *context);
-int32_t lithe_agent_send_json(void *handle, const char *command);
-void lithe_agent_close(void *handle);
 ```
 
 The macOS package uses the small C bridge in `macos/Sources/LitheRustCore/`. The
@@ -312,556 +309,13 @@ and remote roots or different bindings in one request remain unsupported.
 Only schema-owned path/URI fields are mapped; opaque argv and user text stay
 unchanged. This is a client/Core projection, not a remote-server wire change.
 
-The ACP Agent calls use an opaque handle for one agent process and connection
-per workspace and agent; one connection carries many conversation sessions.
-`lithe_agent_open_json` accepts `{ "agentId"?: string, "command"?: string,
-"args": string[], "cwd": absolutePath, "dataDirectory"?: absolutePath,
-"authentication"?: "apiKey" | "codexSubscription",
-"provider"?: { "protocol": "responses" | "chatCompletions" | "anthropicMessages",
-"baseUrl": string, "apiKey": string, "name"?: string, "model"?: string,
-"allowInsecureHttp"?: bool } }`. With `agentId`, the host starts the adapter
-installed by `agent.install` under `dataDirectory`. Omitted `authentication`
-defaults to `apiKey`, which requires `provider`. Credentials travel over ACP
-stdio, never in Lithe's adapter launch arguments, environment, or files.
-This guarantee covers Lithe launching the ACP adapter, not the entire child
-process tree. The pinned Claude SDK serializes object-valued `options.settings`
-into the Claude Code CLI's `--settings` argument. Consequently,
-`settings.env.ANTHROPIC_API_KEY` is visible in that child process's arguments;
-SDK debug output may also record those arguments. This route does not eliminate
-that upstream exposure. Moving the key solely to `options.env` requires separate
-validation of precedence against user/project settings to preserve the selected
-provider's credentials.
-Responses providers use `gateway` authentication with `Authorization: Bearer
-<key>`. Claude uses the pinned adapter's public `_meta.claudeCode.options` on
-both `session/new` and `session/load`: its native API-key route is supplied in
-SDK `env` and programmatic `settings.env`, with `apiKeyHelper` and competing
-Bearer/OAuth/custom-header/cloud routes cleared. This avoids the adapter's
-gateway placeholder Bearer token overriding a valid `x-api-key`; it does not
-patch the adapter or change native CLI configuration files. Missing Claude
-credentials fail before session creation instead of falling back to an account.
-The provider model is a new-session default: Claude supplies it only as
-`_meta.claudeCode.options.model` on `session/new`, never as a process-wide
-`ANTHROPIC_MODEL` pin or an `options.model` override on `session/load`. On a
-Claude API-key restore, the Host re-asserts the returned model selector
-(`category: model`) through `session/set_config_option`, even if its value is
-unchanged or outside the picker. Only a matching acknowledgement publishes
-`sessionLoaded`; its complete configuration replaces the load response.
-Rejection, mismatched confirmation or timeout reports a load failure. Both
-requests share the existing 60-second load deadline. Adapters without model
-selectors and other Agent routes retain standard ACP loading; no additional
-model cache, transcript access or global CLI mutation is introduced.
-
-Claude API-key sessions also set `CLAUDE_CODE_MAX_RETRIES=0`,
-`CLAUDE_CODE_RETRY_WATCHDOG=0`, and
-`CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK=1` in both option tiers. The native
-budget cannot distinguish permanent errors and may honor minutes of Retry-After.
-The Host owns a short interactive recovery budget instead: five total prompt
-attempts, with 0.5/1/2/4-second delays. Only known temporary failures before any
-reply, thought, plan, tool or permission progress can be replayed. Permanent
-credentials/access/request/quota errors fail immediately. Native model resolution
-can still probe a missing model twice; this is not another Host attempt.
-Claude API-key connections negotiate AIR v1 `sessionFailure` alongside
-`recommendedValue`. A terminal AIR failure in a successful `end_turn` response
-is normalized to `requestFailed`; its category/actions determine retryability,
-and title/details retain the actionable error. For generic service failures,
-a fixed CLI `API Error:` HTTP banner can veto retries for permanent statuses;
-text never enables a retry. Legacy categorical JSON-RPC `errorKind` remains
-supported; unknown legacy errors are terminal. The failed idle SDK request is
-interrupted before resubmission to avoid duplicated native HTTP requests.
-Codex API-key sessions use native recovery with `request_max_retries=0` and
-`stream_max_retries=4`, so HTTP and stream retries cannot multiply. The pinned
-ACP adapter replaces the gateway provider table; a first-party stdio relay
-applies those public App Server fields on `thread/start`, `thread/resume` and
-`thread/fork`, and disables `features.unbounded_connection_retries`. Other
-configuration, native history, tools and stream processing remain engine-owned.
-The relay also retains native error information in a JSON `litheCodexFailure`
-envelope inside the AIR failure title, because the adapter otherwise drops
-`codexErrorInfo`, HTTP status and details from retry warnings. Only negotiated
-failure metadata is decoded; assistant/model text never enters this policy.
-Titles presented as errors are decoded to the original actionable message.
-Known permanent native categories or HTTP 4xx (except 408/409/429) stop recovery
-immediately, even when the service supplies a long `Retry-After`. Unknown native
-errors retain their native retry decision. The Host recovery window applies
-only before any work; subsequent native recovery is engine-owned.
-Native HTTP 429 may terminate without stream recovery. Before any reply,
-thought, plan, tool or permission progress, only this typed 429 gap may replay
-the settled prompt with short Host delays. It shares the same five-attempt
-counter with native recovery, rather than adding another budget; recognized
-quota/context/budget exhaustion is permanent. No other Codex terminal failure
-automatically resubmits a prompt. Subscription sessions preserve native login,
-refresh and retry policy; custom ACP commands receive no Codex configuration.
-
-Each Codex launch requiring retry compatibility, history recovery or guarded
-subscription observation owns `<system-temp>/lithe-codex-retry-<UUID>/` until its
-process tree stops. Its script comes from embedded first-party source and holds
-no credential. Preparation/spawn failure, cancellation and completion remove
-the directory. The host does not write installed packages, bundles, CLI settings
-or user configuration; this runtime helper is excluded from worktree reuse.
-The route fixture is `rust/fixtures/agent/acp-events-v1.json`'s
-`upstream.claudeSessionRouting`. The
-user's own CLI is passed as `CODEX_PATH` or `CLAUDE_CODE_EXECUTABLE`, and a
-non-empty Codex `model` as `CODEX_CONFIG`; Claude uses the per-new-session option above. Without `agentId`, `command` runs
-a user-provided agent that must support gateway sign-in with a Responses
-provider. Agents start with the executable's directory and the login shell's
-`PATH` first. API-key mode never falls back to account login. Invalid settings
-and launch failures are reported as a `stopped` event with a message.
-
-`codexSubscription` is accepted only for `agentId: "codex-acp"` with no
-`provider`. It reuses the locally installed Codex CLI and its own account storage
-(including `CODEX_HOME`). The child uses the official `openai` model provider;
-inherited API-key, endpoint, token and gateway overrides are removed for this
-child only. Session configuration also clears `openai_base_url` and selects the
-official `chatgpt_base_url`, preventing saved custom routes from overriding the
-subscription selection. The quota probe always keeps the official account route; optional inference observation never changes login or quota routing. No Lithe HTTP provider, stored API key or configured provider model
-is consulted. Codex owns login, token refresh and session model options.
-The pinned ACP adapter's `_auth/status_update` notification confirms the account.
-An existing account proceeds to `account` then `ready`; otherwise
-`authenticationRequired` waits for the user's `authenticate` command before
-`authenticating` opens the upstream ChatGPT browser login. Login is cancellable
-by closing the handle, with a five-minute deadline. Account loss or email change
-disconnects the connection rather than silently changing its billing identity.
-`account` exposes only nullable `email` and `plan`, never credentials.
-
-`refreshQuota` is ignored outside subscription mode, coalesced while in flight,
-and throttled to one read per connection per 60 seconds. The host uses a bounded
-20-second, short-lived official `codex app-server` process because codex-acp
-1.13.1 does not expose structured rate limits. It only initializes, checks
-`account/read`, reads `account/rateLimits/read`, and checks the account again;
-it never creates a thread or prompt. The process tree is owned by the connection
-and terminated after the query or cancellation. The account email must match
-the active ACP account; missing identity cannot prove a match. This is not a
-workspace/account-ID verification guarantee: the upstream ACP identity provides
-no stable account ID. Lithe reads no credential files for this path.
-
-`quota.snapshot` has `fetchedAt` (Unix seconds) and deterministic `windows` with
-`id`, `name`, `limitSeconds`, nullable `usedPercent` (0–100) and nullable
-`resetsAt` (Unix seconds). Actual window durations are preserved; primary does
-not imply five hours. Unknown usage remains null. `quotaFailed.code` is
-`unavailable`, `timeout`, `unparsable`, `unauthorized`, or `accountChanged`.
-Consumers retain the last snapshot as stale for transient errors, clear it on
-identity failures/disconnect, and never reinterpret unknown as zero. The macOS
-composer refreshes while visible and active, and requests a throttled refresh
-after turns. Hover details include all windows and reset times; API-key
-connections show no quota control.
-macOS keeps a compact icon and text quota summary in the composer top strip,
-preferring the actual five-hour window and falling back to the actual seven-day
-window. Details appear only on hover and show
-separate used percentages, gray-track progress bars and reset times. Known usage
-is green through 60%, yellow above 60% through 90%, and red above 90%; unknown
-or stale data remains gray. Window duration and missing values are never invented.
-
-`lithe_agent_send_json` queues one command: `newSession`, `loadSession`,
-`listSessions`, `setConfigOption`, `applyNextTurnConfiguration`, `prompt`, `steer`, `cancel`, `permission`, `authenticate`,
-or `refreshQuota`. Results arrive as events:
-`ready`, `sessionCreated`, `sessionLoaded`, `sessions`, `update`, `permission`,
-`sessionConfigured`, `nextTurnConfigured`, `modelCall`, `steeringResult`, `turnRetrying`, `turnActivity`, `turnCancelling`, `turnFinished`, `requestFailed`, `stopped`,
-`authenticationRequired`, `authenticating`, `account`, `quota`, and `quotaFailed`. Commands and events, including
-their camel-case field names, are fixed by
-`rust/fixtures/agent/acp-events-v1.json`; `token` values are echoed so a caller
-can correlate concurrent requests. `stopReason` uses ACP wire names such as
-`end_turn` and `cancelled`.
-
-Codex `sessions` and `archivedSessions` use the installed official App Server's
-`thread/list` across all providers, within the selected account's Codex home,
-source-kind and workspace scope. The Host
-normalizes its `recencyAt` (conversation activity) into the existing optional
-ISO 8601 `updatedAt` history field, and sorts upstream pages by `recency_at`.
-`useStateDbOnly: true` avoids rollout-file scans/read-repair for this read-only
-listing. Merely loading a conversation or changing its metadata can advance
-Codex's raw `updatedAt`; that field is never a fallback for activity. Missing or
-invalid `recencyAt` yields `updatedAt: null`, so consumers omit the relative time
-and time-sorted history rows place unknown activity after known timestamps,
-breaking ties by session ID. The switcher's existing current-session pin is unchanged.
-Listing failure retains consumers' existing rows through `requestFailed`; it
-does not fabricate a local timestamp. Other Agents retain standard ACP listing.
-`rust/fixtures/agent/history-activity-v1.json` covers initial state, metadata-only
-viewing, and a new conversation turn. The history UI geometry is unchanged.
-
-History summaries may additionally include `modelProvider`, the opaque provider
-identity reported by upstream history. Missing, null or blank metadata is unknown;
-it is never inferred from the current billing route, model name or local annotation.
-Codex forwards `thread/list.modelProvider`; standard ACP Agents without equivalent
-metadata omit it. Older consumers can ignore this additive field. Presentation
-defaults to all providers and may explicitly filter an exact identity or unknown
-metadata, composing with search, favorites, local removal and archived rows.
-Provider choices come from active and archived snapshots, not the configured
-provider catalog. Filtering is local and read-only: it never changes the current
-route, resumes a thread, rewrites history or starts another list request.
-
-Both native Codex App Server listing and standard ACP listing may emit additive `sessionsPage` events for nonterminal pages with matching rows. Each carries the original `listSessions` token and only that page’s summaries. Consumers merge these rows without pruning cached entries or completing the loading state. The existing terminal `sessions` event still carries the full snapshot; consumers that ignore `sessionsPage` remain compatible. A later `requestFailed` retains cached and already received rows. Ignore pages from superseded, completed, or disconnected requests. Empty filtered pages do not end a scan: follow the Agent’s cursor. Platform history surfaces may reuse successful connection-local snapshots (including empty results) for 30 seconds, with independent active/archive freshness; explicit refresh and post-unarchive reconciliation bypass freshness. Failed scans remain retryable and reconnection invalidates freshness. On macOS, a confirmed `turnFinished` invalidates active-list freshness, including for background sessions, without expiring the archive snapshot. A scan still in flight at that boundary may update displayed rows but cannot renew freshness when it completes; the next history open queries again after that scan finishes. Loading or viewing history alone does not invalidate freshness or synthesize activity timestamps. This adds no persisted history or runtime resource directory.
-
-`prompt` retains `text` and optionally carries ordered `files` entries with `uri`
-(a native `file://` URL) and `name` (the display filename). The host validates up to
-32 references and sends upstream ACP `resource_link` blocks after the text block;
-empty text is allowed when files are present. It never reads, copies, or embeds
-file bytes. These native resource URLs identify user-selected context, not portable
-workspace records; the agent owns reading, permissions, and history. Invalid
-references produce `requestFailed` before reserving a turn. Older text-only callers
-remain compatible by omitting `files`.
-
-The Host appends one standard ACP text block containing the immutable connection
-`cwd` as JSON `openedWorkspaceRoot`, with guidance that "current project" means
-the editor's opened workspace unless the user specifies otherwise. A containing
-repository and inherited `AGENTS.md`/`CLAUDE.md` retain their development-rule
-role, without replacing the subject of project-purpose/structure questions.
-The same builder handles `prompt` and `steer`, retry payloads, and prompts after
-`session/load`; it never reads a README or guesses a Git root. User text stays
-first and file links retain their order. Native slash commands retain their original text and ordered attachment links,
-including leading whitespace and deferred steering commands; no workspace block
-is appended, so adapter command parsing and `/usage` detection keep working.
-No optional prompt capability, private system prompt, new command field, or
-provider-specific path override is required.
-
-Only the exact Host-added workspace text suffix is omitted from
-`user_message_chunk` presentation, including adapters that join adjacent text
-blocks in history. Generated `session_info_update.title` and session-list titles
-also omit a recognized full or truncated, whitespace-normalized Host suffix.
-If the remaining title is empty or whitespace-only, it is represented as `null`
-in the Host event rather than an empty string, preserving downstream provisional
-message, New Chat, untitled-history and export fallbacks.
-Other user content, model output, tools and metadata pass through unchanged.
-Upstream history remains untouched and may retain this
-context as part of its original prompt; it contributes to upstream token usage.
-Workspace selection remains platform-owned, and this context is guidance rather
-than a filesystem sandbox. The `workspaceContext` fixture covers nested roots,
-normal prompts, steering, restored prompts and clean user-message replay.
-
-`ready.canSteer` is true only when the ACP initialize response's top-level
-`_meta.steering.supported` is exactly true; absent capabilities remain false.
-`steer` carries `token`, `sessionId`, `text` and optional `files`, with the same
-validation as `prompt`. The Host uses the existing `_session/steering` extension,
-not a concurrent `session/prompt`. One outstanding supplementary request per
-session preserves ordering. Its `steeringResult` echoes the token and session;
-`outcome` is `injected`, `promptRequired`, or `failed` (with `message`). These
-delivery results never finish or reset the original logical turn. `injected`
-means upstream accepted the input, not proof that a model has already consumed it.
-Only `promptRequired` explicitly leaves the input unconsumed and permits the
-client to submit it once through normal `prompt`, after completion and staged
-configuration. Stop revokes this fallback even while configuration is pending
-and no native turn is active; it leaves the configuration request intact and
-does not send a native cancel for an unstarted continuation.
-Unknown delivery after a thirty-second
-request timeout closes the connection; it never blindly replays the message.
-
-Supplementary input whose first text block starts with `/` (ignoring leading
-whitespace) is left unconsumed by the Host, with `promptRequired`, instead of
-being passed to the steering extension. This also applies when files accompany
-the command. The client waits for the original turn and staged configuration,
-then submits it once via normal `prompt`; the owned ACP response confirms
-completion even when the command never starts a model turn. Command parsing
-remains upstream-owned. Codex ACP 1.13.1 reports `startedNewTurn` for both real
-continuations and completed command-only input, so that outcome alone cannot
-establish a native lifecycle for a command.
-
-The pinned Codex ACP may instead return `startedNewTurn` at the completion
-boundary for ordinary supplementary messages. The Host reports it as accepted
-and retains the same logical turn until Codex's explicit
-`_meta.codex.threadStatus` transitions end the continuation.
-The original idle and the continuation's idle are distinct; duplicate idle
-updates do not complete another turn. Stop and its existing watchdog still apply.
-Original-response usage is omitted for this detached continuation because no
-complete ACP usage response is available. An unknown adapter returning a detached
-continuation closes the connection rather than manufacturing completion. macOS
-displays supplementary input with pending/received/failed delivery; live user
-echoes do not duplicate local input, while history loading still replays messages.
-
-`sessionCreated` and `sessionLoaded` optionally carry the agent's `configOptions`.
-`setConfigOption` carries `token`, `sessionId`, `configId`, and a select-option
-string `value`; the host uses ACP `session/set_config_option`. Its acknowledged
-full option list arrives as `sessionConfigured`. Consumers also accept ACP
-`config_option_update` notifications. Agent-provided IDs, choices and current
-values remain authoritative; unsupported controls are not synthesized.
-Configuration failure echoes the token and does not finish a prompt. Native clients may stage next-turn choices while a
-prompt is active, without sending configuration commands or replacing the
-Agent-confirmed values. Both products keep that intent per session and, after a
-terminal turn event (including a failed turn), send one
-`applyNextTurnConfiguration` command with `token`, `sessionId`, the product's
-latest `catalog` (`id`, optional `category`, `currentValue`, `choices` value
-IDs) and `choices` (`configId`, `value`). The Host owns the order and
-validation: model options first, then the rest in catalog order; each remaining
-choice is revalidated against the latest catalog the Agent returned, skipped
-when already current, and must be confirmed by the Agent's reported value. It
-answers with one `nextTurnConfigured` event (`token`, `sessionId`, optional
-`configOptions` = latest Agent catalog once any request succeeded, optional
-`failure` = `unsupported` | `notConfirmed` | `requestFailed`, and for a failed
-request the upstream `message`). Products localize the failure code, clear the
-remaining intent, keep confirmed settings, and fail a deferred supplement
-instead of sending it; disconnect clears the intent as well. A deferred
-supplement after a failed turn is failed with that turn's error, never replayed.
-The next prompt remains blocked until the command finishes. The Host still
-rejects the command while the session's prompt is running. Shape and cases:
-`rust/fixtures/agent/next-turn-configuration-v1.json`.
-
-For a new session, the host also preserves the adapter's optional legacy model
-catalog while decoding the ACP response and negotiates only the versioned
-`jetbrains.air.recommendedValue` extension. If the configured current model is
-absent from that catalog, the host prefers an upstream recommendation present in
-both the catalog and selector. Without a usable recommendation it selects the
-first catalog model available in the selector, including grouped options. The
-host requests that model before publishing `sessionCreated`; only the
-acknowledged full configuration is exposed, keeping the official choices visible
-after the adapter removes its synthetic unknown model. Both
-requests share the session creation deadline; rejection, timeout, or an
-unconfirmed selection emits `requestFailed`. Valid configured models, loaded
-history, and global CLI files remain unchanged. Missing or malformed optional
-catalog data or an empty catalog/selector intersection leaves standard ACP
-behavior intact. The `upstream`
-scenarios in the agent fixture protect this workflow without changing the
-command/event JSON shape.
-
-A `cancel` answers pending permissions with `cancelled`, sends one
-ACP `session/cancel`, and reports `turnCancelling`. The session remains busy
-until its prompt response arrives. A second prompt and configuration changes
-are rejected while it is busy. If the agent fails to acknowledge within ten
-seconds, the connection fails and its process tree is stopped; clients retain
-the visible transcript and offer reconnect followed by `session/load`. This
-explicit recovery prevents another message from entering a lost cancelled turn.
-Other sessions on the same process are also detached on this failure.
-Normal cancellation does not restart the process.
-
-Normal `prompt` turns have no absolute wall-clock deadline. Silence alone cannot
-prove that model reasoning or a tool has stalled. After five minutes without
-reported reply, thought, plan or tool progress, the host emits advisory
-`turnActivity` with `sessionId` and `quiet: true`, once per quiet interval. Actual
-progress emits `quiet: false` and starts a fresh advisory interval. The threshold
-is fixed in `agent-turn-policy.json`, consumed by the shared Host and the Windows
-frontend monitor. This notice never cancels, releases or replays the prompt.
-Clients offer continue waiting (dismiss only) and stop, preserving busy state,
-transcript, edits and elapsed time. Completion, failure and disconnect clear it.
-Permission and stopping states take precedence over the advisory.
-
-Permission decisions have no timer. The host tracks all pending permissions in
-that turn and suspends the quiet advisory until all are answered, then starts a
-fresh interval. Registration stays ordered under the permission/turn locks;
-waiting and responding run in an SDK-owned task so inbound updates, additional
-permission requests and connection EOF are not blocked. Cancel, terminal prompt
-response and connection shutdown settle every pending request with `cancelled`.
-Child permissions retain both the original requester and the owning root turn.
-Registration holds the ownership lock through insertion into the permission map;
-lock order is ownership, pending permissions, then running turns. A terminal
-child or ancestor settles only that subtree's pending requests with `cancelled`,
-rejects later requests from that subtree, and leaves root and sibling permissions
-and the root prompt running. Settled requests release quiet-period accounting.
-The existing child lifecycle update also removes those prompts from the UI queue
-and refreshes its attention and tool-wait interval; no new wire event is needed.
-Initialization, session/configuration requests, pre-work failure recovery and
-cancellation acknowledgment retain their own bounded deadlines. Tool execution
-and model-request budgets belong to the upstream Agent. This policy does not
-provide a new user-configurable task budget.
-
-The pre-work API-key reconnecting window is twenty seconds from the first temporary
-failure, in addition to the initial request and at most ten seconds to confirm
-cancellation. It does not reset on each retry. Actual progress removes this
-short window and prohibits whole-turn replay; normal turn duration remains unlimited.
-Codex owns later stream recovery after progress. While its public error metadata
-reports `willRetry: true`, the Host retains the same busy turn without a recovery
-deadline or a second attempt limit, and never replays the whole prompt. Native
-`stream_max_retries=4` remains configured; this is not unbounded native retry.
-Permanent errors, explicit terminal failure, process/connection closure and user
-Stop still end the turn through the existing acknowledgment/cleanup paths. A
-terminal error preserves local messages and edits; explicit continuation reuses
-the session, or reloads native history after reconnection, without automatically
-resending the original request. Upstream persistence of unfinished fragments is
-not guaranteed. Pre-work window expiry retains the same busy/cancel/acknowledgment semantics
-above and reports the last provider error. During backoff, user cancellation
-ends the local turn without another prompt. `turnRetrying` carries `sessionId`,
-a unique Host or native `turnId`, and `attempt` (at least 2). Pre-work recovery
-includes `maxAttempts` (5); native recovery after work omits it, because observed
-warnings cannot establish a Host limit for engine-owned requests. It is a
-recovery observation, not actual work or a terminal event. macOS presents
-“Reconnecting 2/5…” with elapsed time; it clears counts on progress or completion
-and ignores retries for retired turns. With no maximum it presents
-“Reconnecting…”. Five minutes after the first post-work recovery warning, the
-Host emits the same quiet advisory; further warnings cannot postpone it. Actual
-progress clears it and starts normal quiet tracking again. macOS shows a recovery
-waiting notice with Continue waiting and Stop; dismissal does not resend or
-release the busy turn. Permission and Stop take priority. No silent timer implies
-thinking or retry.
-Generic ACP support does not imply control of its retry engine. Unadapted agents
-retain their native retry policy without a Host absolute prompt limit; reliable
-counts and a short recovery window require explicit provider recovery events or
-a verified configuration adapter. Lithe never applies blind prompt replay to
-arbitrary agents.
-
-ACP `usage_update` notifications are forwarded unchanged in `update`, with
-`used` (tokens currently in context) and `size` (context window capacity), scoped
-by `sessionId`. Consumers replace the previous snapshot, allowing usage to drop
-after compaction; these values are not cumulative billing tokens. Missing or
-invalid data and a zero capacity represent unknown usage, not an empty window.
-The macOS indicator clears stale capacity on disconnect or confirmed model
-changes; it does not infer limits from model names. A consumer may retain the
-last actual report in its existing workspace/Agent/session-scoped store, bound
-to confirmed raw model option IDs and values. Restore it only after loading
-confirms the same nonempty model selection. Preserve the historical source
-in state; the macOS UI omits source labels and shows only the usage figures.
-A new valid or invalid replay report takes precedence. Model changes
-invalidate stored occupancy; historical messages without a report remain unknown.
-For the pinned Codex adapter, the Host may recover its missing history report
-from the existing native App Server connection during the same load. The relay
-uses an authenticated, bounded, per-launch loopback channel and per-load tickets;
-no second thread writer, prompt or private history parsing is used. The Host
-emits the same `usage_update` shape before `sessionLoaded`, with
-`_meta.lithe.contextUsageSource: "history"` to identify a last-reported snapshot.
-Standard ACP reports take precedence; cancelled/replaced loads cannot publish
-a late native report. Failure or absent native usage never blocks history loading.
-
-`turnFinished` optionally includes the ACP prompt response's `usage` object:
-required unsigned `totalTokens`, `inputTokens`, `outputTokens`, and optional
-`thoughtTokens`, `cachedReadTokens`, `cachedWriteTokens`. The pinned SDK's
-`unstable_end_turn_token_usage` feature preserves these counters; absent, null
-or invalid usage is omitted without preventing completion. Zero is a reported
-value. Counters are Agent-owned: consumers must not infer a per-turn aggregate,
-session delta or billing amount, because the adapters' accounting scopes differ.
-They must not derive these counters from context occupancy or subscription quota.
-`acp-events-v1.json` covers completion both with and without usage.
-
-The launch JSON's optional `observeSubagents` (default `false`) negotiates the
-pinned adapters' AIR v1 `nativeSubagentSessions` capability. macOS and Windows enable it;
-consumers without child-session UI omit it. Native execution and history remain
-upstream-owned. `update` preserves the immediate parent `sessionId` and the
-adapter's `subagent_spawned` payload (`subagentSessionId`, `name`, `task`,
-`capabilities`), or `subagent_state_update` payload (`subagentSessionId`, `state`).
-Ordinary child updates use the child's `sessionId`. Cycles, cross-parent
-reattachment and reuse of a known root ID are rejected. A root history reload
-clears its old child associations before upstream replay announces them again.
-The host's bounded notification shim adds these two adapter variants to the
-pinned SDK; all ordinary updates still use SDK validation. The newer SDK's
-experimental `subagent_update` draft is not wire-compatible with these adapters.
-
-Child permissions retain their original request `sessionId`, while the outer
-`permission.sessionId` identifies the owning root turn. Root cancellation,
-completion or shutdown settles all child permission waits through the existing
-permission lifecycle. Terminal children and their descendants cannot request
-new permissions. Child output and lifecycle count as actual root progress;
-child model failures never trigger a whole-root replay. Child messages and
-thoughts are scoped separately from the root reply; tool IDs are scoped by
-child session, preserving file-review evidence. Only an explicit `completed`
-state counts as success. Failed, cancelled and disconnected children do not;
-a terminal parent leaves any unreported descendant outcome disconnected.
-`acp-events-v1.json` includes nested ownership, output, tools and completion.
-
-The launch JSON's optional `observeModelCalls` (default `false`) asks the host to
-start a loopback proxy for API-key gateways or Codex subscription inference and hand the Agent
-`http://127.0.0.1:<port>/lithe-<token>` instead of the configured endpoint.
-Requests and responses are forwarded unchanged; requests other than generation
-endpoints stream through without buffering, and generation bodies over 32 MiB
-are forwarded without composition. Same-origin `Location` headers are mapped
-back onto the proxy path; cross-origin targets are left unchanged. A proxy that
-fails to start leaves the native route unchanged. Codex subscriptions retain the
-official OpenAI provider and receive a process-only openai_base_url ending in
-/backend-api/codex; Codex owns account credentials, refresh and retries. Each generation request
-(`.../messages`, `.../responses`, `.../chat/completions`) then produces one
-`modelCall` event with `call.api`, optional `model`, HTTP `status` (200 for
-WebSocket completion or an explicit upstream error status), `streaming`,
-optional `firstTokenMs`, `durationMs`, optional provider `usage`
-(`inputTokens` excluding cache reads and writes for every protocol, `cacheReadTokens`, `cacheWriteTokens`,
-`outputTokens`, optional `reasoningTokens`) and optional estimated prompt
-`context` (`systemPromptTokens`, `toolTokens`, `mcpToolTokens`, `messageTokens`,
-`toolCount`, `mcpToolCount`, `scaledToUsage`) and, only when true, `auxiliary`
-(a background request the Agent made for itself, such as Claude Code naming the
-session: its tokens count, but it is not a conversation step). Claude subscription
-connections are observed the same way: the host points `ANTHROPIC_BASE_URL` at the
-loopback proxy, which forwards to `https://api.anthropic.com` byte for byte while
-the CLI keeps sending its own credentials. `sessionId` is present only when
-exactly one non-cancelling prompt was running when the request started; consumers
-drop unattributed calls instead of guessing. The host waits up to two seconds for
-a turn's attributed calls to report before emitting its `turnFinished`, so they
-arrive first. A call still open after that bound carries `afterTurnFinished: true`
-and counts for the session only, never for a later turn. Each `modelCall` also carries
-`statistics`, the Host's accounting contribution of that call (`requests`,
-`steps`, `failedSteps`, `nonStreamingSteps` for successful non-streamed steps
-only, `durationMs`, the four token buckets, optional `reasoningTokens`,
-`callsWithUsage`, `firstTokenMs`/`firstTokenCount` and
-`generationMs`/`generatedTokens` of streamed steps, and optional `context` when
-the call describes the current prompt: auxiliary requests never do, and once a
-session's main requests carry tools, tool-less ones no longer do). Products
-merge contributions in event order (counters add, `reasoningTokens` adds over
-calls that report it, a present `context` replaces the previous one) and never
-reinterpret `call` for accounting. Cases:
-`rust/fixtures/agent/model-call-statistics-v1.json`. The launch accepts `contextLimits` (`windowTokens`, `autoCompactTokens`, both optional;
-zero means unset). Codex receives them as `model_context_window` and
-`model_auto_compact_token_limit` in its session configuration. Claude Code has a single
-switch, so the threshold (else the context length) is exported as
-`CLAUDE_CODE_AUTO_COMPACT_WINDOW`. The Agent's reported `usage_update.size` can differ from
-the configured value and may change within a turn, so consumers cap the displayed
-capacity themselves instead of trusting the report. Redirect (3xx) hops are
-forwarded but are not model calls; only the followed request is reported.
-Responses WebSocket upgrades preserve the original handshake and wire bytes,
-including masking, fragments, compression, control frames and close frames.
-Observation parses copies with a 32 MiB limit for each frame/assembled or
-inflated message, preserving each negotiated deflate dictionary lifetime.
-Each response.create inference has one observation; generate=false prewarm,
-handshakes and control frames never count. previous_response_id inherits only
-verified cached numeric section sizes and completed output sizes. One previous
-response ID (at most 256 bytes) and at most 1024 output item sizes are retained
-per connection. Unknown previous IDs omit composition rather than treating a
-delta as the whole context. Malformed, overlapping or over-budget messages
-stop observation only; forwarding continues. All upgraded sockets and tasks
-are closed with the owning launch. Bodies and credentials are never persisted.
-The existing native relay permits subscription observation only after a current
-account/read confirms workspaceRouting with backendOrigin https://chatgpt.com
-and accountRoutingOverride NO_CONSTRAINT. Missing/failed/managed routing keeps
-the native default inference endpoint. Account/login change notifications revoke
-confirmed routing and pending discovery requests, so a late response cannot
-authorize the new account or workspace even when its email is unchanged. A fresh
-native query is required; an account change also closes an already observed
-connection. Login, workspace discovery and quota routing remain native.
-Old subscription histories retain actual native context occupancy but cannot
-acquire missing request composition retroactively.
-
-Calls without `usage` make session token sums a lower bound, which consumers
-must label as such. Unparsable provider data omits the
-optional fields and never affects forwarding. Without these events, consumers do
-not estimate model-call counts, first-token latency, output speed or prompt
-composition. Decision:
-`.agents/notes/implemented/architecture/2026-10-13-agent-model-call-observation.md`.
-
-macOS keeps local turn statistics in memory. Elapsed time uses a monotonic clock
-from user submission (including queued session creation/loading, tools and
-permission waits) until completion, request failure or disconnect. Cancellation
-continues timing until acknowledged. Each observed turn keeps a frozen footer
-before the next user message; tab switches do not reset it. Replayed history
-does not fabricate timing or token measurements absent from the Agent's records.
-
-Tool updates preserve ACP `kind`, `locations`, `rawInput`, `rawOutput`, and
-`content` (including diffs). Partial updates replace only fields supplied by
-the agent. Permission displays combine already received tool details with the
-permission request, and distinguish allow/reject option kinds.
-
-The Host advertises `clientCapabilities.session.notices: {}` using the pinned
-SDK's `unstable_session_notices` feature. ACP `notice` updates retain their
-`severity`, plain-text `title`, and optional `description` in the existing
-`update` envelope. They are live advisories, not assistant replies or persisted
-history. macOS displays the latest notice per session through its shared Banner,
-allows dismissal, and clears it on the next submitted prompt or disconnect.
-An outstanding permission request takes presentation priority without discarding
-the notice; the notice is displayed after the user answers. Visible text is
-bounded to two title lines and three detail lines, with full text on hover.
-Claude ACP 0.81.2 may defer its initial Auto fallback warning until the first
-prompt: its structured warning title `Auto mode unavailable` is shown only
-while the confirmed mode is `acceptEdits`. A confirmed model change clears a
-warning from before that change, while preserving a new warning emitted between
-an upstream Auto-to-Accept-edits mode transition and its next complete config
-snapshot. This transition is session-local and consumed by one config snapshot;
-it also covers native `/model` changes without a local request token. A later
-model change clears the warning normally. A pending or failed local setting must not clear a still-applicable
-warning. Plain assistant text is never classified or removed by this rule.
-When a configuration request is pending, the matching fallback notice waits for
-that request's result before checking the confirmed mode. This preserves a new
-fallback sent before its `config_option_update` or response, while still dropping
-an obsolete startup notice after a confirmed switch to Plan. A newer applicable
-notice in the same session invalidates the older pending fallback, so a later
-configuration success or failure cannot replay it over the newer notice. In the
-reverse order, the newest fallback still waits for confirmation before replacing
-the earlier notice. Invalid notices and notices for other sessions do not change
-that ordering.
-Windows has no consumer for this shared Host conversation API yet.
-
-The caller must close each handle
-exactly once; closing revokes callbacks and stops the process tree, force
-killing processes that do not exit after a short grace period. The callback
-context must remain valid until close returns. This API is owned by
-`lithe-agent-host` and is separate from the synchronous JSON command envelope.
+The ACP Agent ABI and the `agent.*` commands were removed together with the
+Agent conversation feature. `lithe_agent_open_json`, `lithe_agent_send_json`
+and `lithe_agent_close` no longer exist, and Core starts no adapter, proxies no
+model call and keeps no conversation history. Rust Core keeps only deterministic
+AI configuration parsing (`ai.configuration.*`) plus MCP configuration planning.
+The removed ABI text, fixtures and the `lithe-agent-host` crate remain available
+in this repository's history.
 
 ## Envelope
 
@@ -1120,7 +574,7 @@ the whole batch succeeds. `rust/fixtures/mcp/library-v1.json` holds the shared
 cases; its `{{sourceHash:<file>:<name>}}` placeholders are resolved from the
 parsed fixture files.
 
-### Agent adapters
+### AI configuration
 
 `ai.configuration.sources` takes `{source, home, environment}` (`source` is
 `codex` or `claude`, `home` an absolute path, `environment` only the directory
@@ -1141,189 +595,6 @@ keeps missing endpoint/model fields empty. The shared cases are in
 `rust/fixtures/ai/cli-configuration-v1.json`. It replaces the former
 `agent.parseProviderConfiguration`.
 
-`agent.edits.reversePlan` takes `{diffs, disk}` (normalized edit evidence plus the
-current file text, or `null` when the file is missing) and returns the rollback
-plan or a conflict; it never touches the file system. Path containment, encoding,
-guarded writes and Trash stay with the platform. Cases are in
-`rust/fixtures/agent/edit-review-v1.json`.
-
-`agent.instructions.read` takes `{agentId}` (`codex-acp` or `claude-acp`) and
-returns `{agentId, path, content, exists, revision}`. It does not create files.
-`agent.instructions.save` takes `{agentId, content, expectedPath, expectedRevision}`.
-The host resolves the native user profile again and rejects a changed effective
-path or byte revision before replacing the file. The result is a fresh effective
-snapshot: clearing a Codex override may return the base `AGENTS.md` instead.
-No prompt injection, account settings, repository files, or native history are
-modified. Files must be regular UTF-8 files at most 1 MiB; terminal symlinks are
-rejected. Read-only files cannot be overwritten. Existing file permissions are
-preserved; Unix new files use `0600` and new directories use `0700`.
-Save staging is a sibling temporary file removed on completion/failure.
-Other Lithe saves are serialized by a non-waiting lock; external writers do not
-share it, so revision checks are optimistic rather than an OS-wide transaction.
-Errors use the existing envelope codes with stable `details` reasons including
-`unsupported_agent`, `file_access`, `unsafe_file`, `file_changed`, `file_too_large`,
-`invalid_utf8`, `profile_missing`, `profile_relative`, and `busy`.
-The fixture is `rust/fixtures/agent/agent-instructions-v1.json`.
-
-`agent.instructions.shared` takes a platform-selected absolute `dataDirectory`
-from the writable application-support adapter plus one tagged action:
-
-- `read`: returns `{file, agents}` without creating files. `file` is the shared
-  `Shared.md` snapshot; each Agent reports `{agentId, file, enabled, needsSync,
-  ownLineCount, issue}`. A native read or marker failure sets `enabled: null` and
-  an actionable issue rather than claiming disabled.
-- `save`: takes `content`, `expectedRevision` for Shared.md and `files` guards
-  (`{agentId,path,revision}`) for targets. It saves the shared source, then updates
-  already-enabled native targets. A failed target retains its bytes and an issue;
-  other targets continue. `needsSync` compares the actual block with the saved source.
-- `setEnabled`: takes `agentId`, `enabled`, the shared `expectedRevision` and one
-  `file` guard. It inserts/replaces or removes only the Lithe-delimited block in the
-  effective native file; it never disables the Agent or removes its own instructions.
-
-Marker tokens are `<!-- LITHE:SHARED-INSTRUCTIONS:BEGIN -->` and
-`<!-- LITHE:SHARED-INSTRUCTIONS:END -->`. The owned range includes its separator
-newlines, so disabling restores the original bytes. Duplicate, incomplete or edited
-markers are rejected; shared content may not contain the marker tokens. Native
-source selection, size, permission, symlink and optimistic revision guards remain
-those of `agent.instructions.save`. A nonblocking OS file lock in `.sync.lock`
-serializes shared writes across app processes. Shared.md uses the same 1 MiB bound,
-private Unix modes and atomic replacement; source/target commits are individually
-atomic and partial success is explicit. Cancellation stops remaining targets and the
-next page read reconciles actual state. None of these files is a build cache or
-installed resource. The fixture is `fixtures/agent/shared-instructions-v1.json`.
-
-`agent.hooks` manages a platform-owned writable Hook library. Requests take
-`dataDirectory` and a strict `action`: `read`, `save`, `remove`, or `sync`.
-Mutations require `expectedRevision` and native `files` guards containing
-`agentId`, `path`, and `revision`. Guard paths never select write destinations:
-Agent Host resolves `CODEX_HOME/hooks.json` and `CLAUDE_CONFIG_DIR/settings.json`
-using native profile defaults when environment overrides are absent.
-
-`save` also takes `hook`: a UUID `id`, unique ASCII `name` (1–80 letters,
-digits, hyphens or underscores), `description` (at most 200 Unicode scalars),
-`event` (`turn-end`, `after-tool`, `before-tool`, `prompt`, `session-start`),
-`matcher` (`all`, `shell`, `edit`), nonempty UTF-8 `command` (at most 32768 bytes),
-nullable `timeoutSeconds` (1–86400, null inherits the native default), selected
-`agents` (`codex-acp`, `claude-acp`), `enabled`, and `pendingRemoval: false`.
-Only tool events accept a non-`all` matcher. `remove` takes `id`; `sync` retries
-the existing desired state. Neither configuration management nor reading the
-library executes commands or grants native trust.
-
-The result contains source `revision`, flattened `hooks` with actual
-`configuredAgents` and `needsSync`, plus `targets` containing `agentId`, nullable
-`file` guard, nullable `issue`, and `disabled` (Claude's `disableAllHooks`).
-Native configuration contents, which can include secrets, are never returned.
-Desired state is committed before target writes; target failures remain visible
-and removal failures retain a `pendingRemoval` row. A nonblocking OS file lock
-coordinates library writers. Each bounded UTF-8 file replacement is guarded and
-atomic; cross-file synchronization is explicitly partial, with write-ahead
-ownership records permitting recovery after interruption. Native duplicate JSON
-keys, malformed JSON, symlinks, nonregular files and changed snapshots are rejected.
-Existing unknown JSON values survive writes, while formatting is normalized.
-
-Only exact recorded placements can be retired. Native groups are cleared to
-`{"hooks":[]}` instead of compacted, preserving Codex's index-based trust keys.
-Unchanged commands keep their original positions; edited commands do not inherit
-trust. A matching user-owned entry is never claimed or duplicated. Codex still
-requires native Hook enablement and approval in `/hooks`; `configuredAgents`
-does not claim execution. Source, ownership journal, lock and temporary siblings
-are user state outside installed resources and cannot be reused across worktrees.
-The shared fixture is `rust/fixtures/agent/hooks-management-v1.json`.
-
-`agent.hooks.validateDraft` validates an unsaved editor draft without reading or
-writing files, using the same rules `save` enforces in Agent Host. The payload is
-`{hook, existingHooks}`: `hook` has `id`, `name`, `description`, `event`, `matcher`,
-`command`, `agents` and the raw `timeoutText` of the timeout field (empty inherits
-the native default; only ASCII digits are integers), and `existingHooks` lists
-library rows as `{id, name}` for the case-insensitive unique-name rule. The result is
-`{valid, issues, timeoutSeconds}`: `issues` holds at most one `{field, code}` per
-field in editor order, and `timeoutSeconds` is the parsed value platforms store when
-saving (null when empty or rejected). Fields and codes: `id` `invalid`; `name`
-`required`, `too_long`, `invalid_characters`, `duplicate`; `description` `too_long`;
-`matcher` `incompatible_event`; `command` `required`, `too_long`, `contains_nul`;
-`timeout` `not_integer`, `out_of_range`; `agents` `required`, `unsupported`,
-`duplicate`. Platforms localize `agent.hooks.draft.<field>.<code>` and enable saving
-only when `valid`. A malformed payload fails with `invalid_request`. The fixture is
-`rust/fixtures/agent/hook-draft-validation-v1.json`.
-
-`agent.status`, `agent.install`, `agent.uninstall`, and `agent.installCli` manage ACP adapters in
-`<dataDirectory>/agents/<agentId>`, using the Node.js and npm the user installed.
-Lithe never installs Node.js or npm; the agents' own command-line tools are installed only through `agent.installCli` on an explicit user action. `agent.status`
-detects Node.js and npm through the login shell's `PATH` and lists every
-supported agent with its pinned version, installed version, provider protocol,
-and blocking issues. Each adapter also reports optional `updateAvailable`: true only when the verified catalog version is strictly newer than the installed version under SemVer precedence, false for equal or newer local versions, and absent for missing or unparseable versions. Build metadata does not affect precedence. This target remains Lithe's verified catalog version, not an unverified latest registry version. Hosts must not derive updates from version-string inequality. Adapters that drive the agent's own CLI (Codex, Claude Code) report the
-CLI found on that `PATH` with its minimum version; they are installed with
-`--omit=optional`, so their bundled CLI copy is not downloaded, and are launched
-with the user's CLI through the adapter's variable (`CODEX_PATH`,
-`CLAUDE_CODE_EXECUTABLE`). A missing or
-too old CLI is an issue for the user to resolve, never installed by Lithe.
-For every catalog CLI, `cli.installation.updateAvailable` is `true` only when the verified
-installation owner reports a newer release, `false` when no newer release is found
-(npm's published version or Homebrew's local index), and absent when the check is
-unavailable. Optional `cli.installation.availableVersion` retains the actual target returned by that same query: npm's published version or the matched Homebrew entry's `current_version`. Hosts display the detected current version and confirmed target together, including in the collapsed CLI row. If Homebrew confirms an outdated package without supplying its target version, hosts show an unknown target rather than inferring one from the installed version. Empty Homebrew outdated results do not provide a latest version. Failed read-only probes include optional `cli.installation.updateCheckError` with a bounded diagnostic reason; unavailable native protocols remain unknown without pretending to have checked the latest version. It does not change `canUpdate`, which only describes whether Lithe can
-safely invoke that owner. npm checks query the verified update target, including
-its explicit `@latest` tag; Homebrew checks query the verified owning package and
-do not refresh the local index automatically. Native installers without a
-read-only version protocol report an absent value; checks never execute an
-updater or substitute a different release channel. New catalog CLIs reuse this
-source-based check without command-name branches.
-`agent.install` runs `npm install` into a staging directory
-and replaces the previous install only after the adapter executable exists; it
-honors `operationId` cancellation and `timeoutMilliseconds`. Failures use
-`runtime_missing` (Node.js or npm unusable), `process_failed` (npm failed, with
-its output tail), `invalid_request`, `cancelled`, or `timed_out`. Payloads and
-results are fixed by `rust/fixtures/agent/agent-management-v1.json`.
-
-`agent.installCli` resolves the current PATH executable and its installation
-owner again on each explicit action. A missing CLI uses npm; an existing npm CLI
-requires the selected npm's global root, package manifest/bin and active link
-to agree before `npm install -g <package>@latest`. Homebrew requires the active
-target to belong to its reported Caskroom/Cellar and an installed package receipt;
-it runs `brew upgrade --cask/--formula <owning-package>`, retaining the installed
-channel. A standard Claude native launcher uses `claude update`. Unknown,
-broken, unrecorded, or mismatched Node/npm installations require manual updating;
-there is no force overwrite, installer migration or automatic npm fallback.
-After completion, the host refreshes the login-shell PATH and requires the CLI
-selected there to meet the adapter's minimum version before returning `cliVersion`.
-The successful response also includes optional `updaterWarning` (null for a clean
-exit, a bounded output tail for a recovered installer failure). A nonzero exit
-can succeed only if the CLI is now present and usable, and its numeric version
-strictly increased compared with the pre-update CLI (or it was previously absent).
-An unchanged, downgraded, missing or still-too-old CLI remains `process_failed`;
-cancellation, timeout and process-start failure never recover through a version
-probe. Hosts show the verified version as success and keep any warning/log separate
-from errors. Older responses without `updaterWarning` decode as a clean result.
-Node.js and npm remain user-managed. Detection is read-only and locally bounded.
-
-`agent.status` includes optional `cli.installation` with `source` (`npm`,
-`homebrew`, `native`, `missing`, `unknown`), `canUpdate`, and display-only
-`updateHint`. Hosts show the source and guidance, and offer automatic update
-only when `canUpdate` is true. The hint is never executable input. Absent fields
-remain backward compatible with older hosts. Windows installer/shim ownership
-has not been verified; unrecognized installations use the manual path.
-The minimum CLI version is a compatibility requirement, not a latest-version
-check. For all CLIs, macOS offers Update only when `canUpdate` and
-`updateAvailable` are both true, including when the preflight row is collapsed.
-A false or absent `updateAvailable` hides that action, even for a CLI below the adapter's minimum version; compatibility warnings and manual guidance remain visible. Hosts show loading and completion on every refresh, retain old detection data on failure with the failure reason, and hide stale update actions until a subsequent successful check.
-After a successful update, users reconnect the Agent to start the updated CLI
-and obtain its model catalog; existing conversations are not interrupted automatically.
-
-`agent.install` and `agent.installCli` publish `agentInstallProgress` through the
-existing synchronous `execute_json_with_events`/C ABI event callback. Each event
-carries the request's `operationId` and a `progress` object: `stage` (`preparing`,
-`downloading`, `installing`, `updating`), `downloadedBytes` (received archive body bytes),
-`bytesPerSecond` (most recent sample), `elapsedMilliseconds`, and
-`idleMilliseconds` (since the last archive bytes). Counters contain no URLs,
-headers, credentials, or paths. npm still owns fetching, proxies, retries, cache,
-and extraction. A built-in Node observer counts bytes without consuming its
-stream and restores inherited `NODE_OPTIONS` before npm starts child scripts.
-No total or overall percentage is supplied: npm can discover additional packages
-and may use cached packages. Events stop before the final response, including
-failure, timeout, and cancellation. Hosts reject stale operation IDs and clear
-live counters at completion. Examples are in `agent-management-v1.json`.
-Homebrew and native updaters emit `updating` with zero transfer counters: their
-package manager owns the download and Lithe does not infer bytes from logs.
-
 | Command | Purpose |
 | --- | --- |
 | `core.ping` | Verify the ABI and protocol version |
@@ -6654,80 +5925,6 @@ presentation feature; views never call the C ABI. Windows can reuse validation
 when it later adds a native renderer; Core support does not make Windows
 advertise native plugin content.
 
-### Agent skill management
-
-`agent.skills` accepts explicit `action` values `list`, `directories`, `read`,
-`create`, `import`, and `setEnabled`, with `agentId` (`codex-acp` or `claude-acp`) and optional
-absolute `workspace`. These management operations never create an Agent session,
-send a prompt or stop a running conversation. Only an explicit `setEnabled` action changes native visibility settings.
-The shared fixture is `rust/fixtures/agent/skills-management-v1.json`.
-
-`list` returns `skills`, `source`, `issues`, and native `directories` (`user`,
-plus `repo` when a workspace is present). Each row has `name`, `description`,
-absolute `path`, native `scope` (`user`, `repo`, `system`, `admin`), optional
-`enabled` and optional `pluginId`. Paths are transient platform file-operation
-metadata, not portable persisted identifiers. Rows are sorted by lowercased name
-and path. Native Codex discovery uses the installed CLI's official `skills/list`
-with the selected cwd and `forceReload: true`, reusing the bounded App Server
-probe and process-tree cleanup. Unknown enablement remains null. Missing or
-malformed native results fail explicitly; refresh failure retains previous rows
-only within the same workspace and Agent.
-
-Claude `source: directory` is an explicitly partial inventory of
-`CLAUDE_CONFIG_DIR/skills` (default `~/.claude/skills`) and the selected workspace's
-`.claude/skills`. It does not emulate inherited-directory, plugin, policy or
-session discovery. Its `enabled` reports configured visibility: user rows read user settings; repo rows merge user, project shared and project-local settings. Absent overrides mean on, off means false, name-only/user-invocable-only mean true. Invalid or unreadable configuration leaves the affected state null. This is not effective managed policy or evidence of session availability. Codex `source: agent` is native discovery. Platform UI
-uses Global/Project as the main categories and Agent provenance as a filter.
-
-`setEnabled` requires an absolute discovered `source` path and boolean `enabled`; Claude also requires matching `scope`. It returns a fresh listing using the same shape as `list`. Codex validates the path with `skills/list`, calls official `skills/config/write`, then forces native readback and verifies the desired state. Its setting is global by path even for a project skill. Claude merges only the named `skillOverrides` on/off value into user `settings.json` for global skills, or project `.claude/settings.local.json` for project skills; it preserves unrelated JSON values and permissions, refuses malformed, linked or over-1-MiB files, uses a nonblocking cross-process lock and same-directory atomic replacement with a pre-publish snapshot check. Claude settings are by name, so same-named skills share a setting; project/managed settings can override user settings. Plugin skills are not managed through this operation. Existing session contents cannot be withdrawn: clients advise reconnecting, and never automatically interrupt a running conversation. No skill file is renamed or edited by toggling.
-
-`directories` returns only the native destination map and needs no installed
-CLI. `read` takes the selected absolute `source` path to a `SKILL.md`, reads at
-most 128 KiB of regular UTF-8 text and returns `content`. It never interprets or
-executes instructions, scripts or dynamic content in the document.
-
-`create` requires `scope` (`user` or `repo`), portable `name` (1–64 lowercase
-letters/digits separated by single hyphens), `description`, and `instructions`.
-`import` requires `scope` and an absolute, user-selected `source` (`SKILL.md` or
-its package directory). Writes return the resulting `path`. Codex targets
-`~/.agents/skills` or `<workspace>/.agents/skills`; Claude targets its native
-configuration directory or `<workspace>/.claude/skills`. Project writes require
-an opened workspace. Imports preserve package contents and file permissions,
-reject special files and symbolic links, and enforce 2,000 entries, 20 nested
-levels, 128 KiB per SKILL.md, 8 MiB per resource file and 32 MiB total. Hidden staging is removed on failure or
-cancellation; publication atomically refuses an existing target, including an
-empty directory. Existing skills and import sources are never overwritten.
-These are explicit user-owned documents, not downloaded/build/cache resources;
-no app bundle, installation resource or shared worktree cache is writable.
-
-The macOS settings surface offers search, refresh, file details, native open and
-reveal, creation and import. It keeps native loading separate from management
-and rejects stale results after project changes. Windows can use the same Core
-operations; the settings UI and Windows runtime validation remain pending.
-
-
-Team Build options use `rust/contracts/build-project-options-v1.schema.json`
-at `.lithe/build/options.json`. `options` holds workspace-scoped values;
-`instanceDefaults` applies to every detected root's instance-scoped options;
-`instances` overrides those defaults by normalized root. Platform-local values
-then override that root. Storage writes local differences only; passive detection
-never rewrites the shared document. Explicit local reset reveals the shared value.
-Malformed, unsupported, or inaccessible documents fail instead of becoming empty
-options. Source documents stay read-only during resolution; the host only writes
-one through guarded publication for an explicit edit or activation migration.
-`build.detect.instanceDefaults` receives this same team default snapshot before
-static model/run generation; hosts use the same merge in every subsequent plan.
-
-`savedChoices` preserves unselected custom choices. Hosts display them only when
-the resolved option permits custom values; they never change selection or upstream
-model facts. Storage validates bounded documents and preserves invalid originals.
-
-`build.decodeTestResults.request.result` accepts a canonical inline report only
-for `test.results.decoder=provider` (buildProviders 8). Provider replies carry
-`testResults` with the same execution. Core validates bounded case fields and
-workspace-relative paths and aggregates by optional project/suite/case identity;
-the host does not read tool-specific report directories for this decoder.
-
 ### Project JDK supplied to JDT LS
 
 `lsp.startServer.javaRuntimes` entries contain `homePath`, `version`, and optional
diff --git a/rust/fixtures/agent/acp-events-v1.json b/rust/fixtures/agent/acp-events-v1.json
deleted file mode 100644
index 2e95d83d..00000000
--- a/rust/fixtures/agent/acp-events-v1.json
+++ /dev/null
@@ -1,547 +0,0 @@
-{
-  "version": 1,
-  "workspaceContext": {
-    "relativeRoots": ["parent/examples/spring-service", "parent/examples/another-service"],
-    "question": "这个项目是用来做什么的",
-    "supplement": "继续讲解当前项目的结构",
-    "nativeCommandWithFilesContent": [
-      { "type": "text", "text": "  \n/status" },
-      { "type": "resource_link", "uri": "file:///example/project/Hello%20World.swift", "name": "Hello World.swift" },
-      { "type": "resource_link", "uri": "file:///example/project/README.md", "name": "README.md" }
-    ]
-  },
-  "commands": {
-    "authenticate": { "kind": "authenticate" },
-    "refreshQuota": { "kind": "refreshQuota" },
-    "newSession": { "kind": "newSession", "token": "token-1" },
-    "loadSession": { "kind": "loadSession", "token": "token-2", "sessionId": "session-1" },
-    "listSessions": { "kind": "listSessions", "token": "token-3" },
-    "listArchivedSessions": { "kind": "listArchivedSessions", "token": "archived-1" },
-    "unarchiveSession": { "kind": "unarchiveSession", "token": "unarchive-1", "sessionId": "archived-session-1" },
-    "prompt": { "kind": "prompt", "sessionId": "session-1", "text": "Explain this project" },
-    "steer": { "kind": "steer", "token": "steer-1", "sessionId": "session-1", "text": "Focus on login" },
-    "promptWithFiles": { "kind": "prompt", "sessionId": "session-1", "text": "Explain these files", "files": [{ "uri": "file:///example/project/Hello%20World.swift", "name": "Hello World.swift" }, { "uri": "file:///example/project/README.md", "name": "README.md" }] },
-    "fileOnlyPrompt": { "kind": "prompt", "sessionId": "session-1", "text": "", "files": [{ "uri": "file:///example/project/README.md", "name": "README.md" }] },
-    "nativeCommandWithFiles": { "kind": "prompt", "sessionId": "session-1", "text": "  \n/status", "files": [{ "uri": "file:///example/project/Hello%20World.swift", "name": "Hello World.swift" }, { "uri": "file:///example/project/README.md", "name": "README.md" }] },
-    "cancel": { "kind": "cancel", "sessionId": "session-1" },
-    "setConfigOption": { "kind": "setConfigOption", "token": "config-1", "sessionId": "session-1", "configId": "model", "value": "example-model" },
-    "allowPermission": { "kind": "permission", "requestId": "permission-1", "optionId": "allow_once" },
-    "denyPermission": { "kind": "permission", "requestId": "permission-1", "optionId": null }
-  },
-  "events": {
-    "subagentSpawned": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": {
-        "sessionUpdate": "subagent_spawned",
-        "subagentSessionId": "child-1",
-        "name": "Explore",
-        "task": "Inspect the sample project",
-        "capabilities": {}
-      }
-    },
-    "nestedSubagentSpawned": {
-      "kind": "update",
-      "sessionId": "child-1",
-      "update": {
-        "sessionUpdate": "subagent_spawned",
-        "subagentSessionId": "child-2",
-        "name": "Verify",
-        "task": "Verify the sample tests",
-        "capabilities": {}
-      }
-    },
-    "subagentMessageChunk": {
-      "kind": "update",
-      "sessionId": "child-1",
-      "update": {
-        "sessionUpdate": "agent_message_chunk",
-        "content": {
-          "type": "text",
-          "text": "The sample project contains a README."
-        }
-      }
-    },
-    "subagentThoughtChunk": {
-      "kind": "update",
-      "sessionId": "child-1",
-      "update": {
-        "sessionUpdate": "agent_thought_chunk",
-        "content": {
-          "type": "text",
-          "text": "Inspecting the sample project files."
-        }
-      }
-    },
-    "subagentToolCall": {
-      "kind": "update",
-      "sessionId": "child-1",
-      "update": {
-        "sessionUpdate": "tool_call",
-        "toolCallId": "tool-1",
-        "title": "Read README.md",
-        "kind": "read",
-        "status": "in_progress",
-        "rawInput": {
-          "path": "README.md"
-        }
-      }
-    },
-    "subagentStateUpdate": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": {
-        "sessionUpdate": "subagent_state_update",
-        "subagentSessionId": "child-1",
-        "state": "completed"
-      }
-    },
-    "authenticationRequired": {"kind": "authenticationRequired"},
-    "authenticating": {"kind": "authenticating"},
-    "account": {"kind": "account", "account": {"email": "person@example.test", "plan": "plus"}},
-    "quota": {"kind": "quota", "snapshot": {"windows": [{"id": "codex:primary", "name": "codex", "limitSeconds": 18000, "usedPercent": 68, "resetsAt": 1800003600}], "fetchedAt": 1800000000}},
-    "quotaFailed": {"kind": "quotaFailed", "code": "timeout"},
-    "ready": {
-      "kind": "ready",
-      "agentName": "example-agent",
-      "agentVersion": "1.0.0",
-      "canLoadSessions": true,
-      "canListSessions": true,
-      "canListArchivedSessions": false,
-      "canSteer": false
-    },
-    "sessionCreated": { "kind": "sessionCreated", "token": "token-1", "sessionId": "session-1" },
-    "steeringResult": { "kind": "steeringResult", "token": "steer-1", "sessionId": "session-1", "outcome": "injected" },
-    "sessionLoaded": { "kind": "sessionLoaded", "token": "token-2", "sessionId": "session-1" },
-    "sessionConfigured": {
-      "kind": "sessionConfigured", "token": "config-1", "sessionId": "session-1",
-      "configOptions": [
-        { "id": "model", "name": "Model", "category": "model", "type": "select", "currentValue": "example-model", "options": [{ "value": "example-model", "name": "Example Model" }] },
-        { "id": "mode", "name": "Permissions", "category": "mode", "type": "select", "currentValue": "read-only", "options": [{ "value": "read-only", "name": "Read Only" }, { "value": "auto", "name": "Auto" }] },
-        { "id": "reasoning_effort", "name": "Reasoning", "category": "thought_level", "type": "select", "currentValue": "medium", "options": [{ "value": "medium", "name": "Medium" }, { "value": "high", "name": "High" }] }
-      ]
-    },
-    "turnCancelling": { "kind": "turnCancelling", "sessionId": "session-1" },
-    "turnActivityQuiet": { "kind": "turnActivity", "sessionId": "session-1", "quiet": true },
-    "turnActivityResumed": { "kind": "turnActivity", "sessionId": "session-1", "quiet": false },
-    "turnRetrying": { "kind": "turnRetrying", "sessionId": "session-1", "turnId": "host-turn-1", "attempt": 2, "maxAttempts": 5 },
-    "turnRecovering": { "kind": "turnRetrying", "sessionId": "session-1", "turnId": "native-turn-1", "attempt": 6 },
-    "claudeSessionFailure": {
-      "kind": "update", "sessionId": "session-1",
-      "update": { "sessionUpdate": "session_info_update", "_meta": { "jetbrains": { "air": { "version": 1, "sessionFailure": { "id": "upstream-turn-1:error", "revision": 1, "category": "access", "severity": "error", "title": "Sign in to continue using Claude.", "details": "API Error: 401 Invalid API key", "actions": ["login"] } } } } }
-    },
-    "sessionsPage": {
-      "kind": "sessionsPage", "token": "token-3",
-      "sessions": [
-        { "sessionId": "session-1", "title": "Explain this project", "updatedAt": "2026-09-25T10:00:00Z" }
-      ]
-    },
-    "sessions": {
-      "kind": "sessions",
-      "token": "token-3",
-      "sessions": [
-        { "sessionId": "session-1", "title": "Explain this project", "updatedAt": "2026-09-25T10:00:00Z" },
-        { "sessionId": "session-2", "title": null, "updatedAt": null }
-      ]
-    },
-    "archivedSessions": {
-      "kind": "archivedSessions",
-      "token": "archived-1",
-      "sessions": [
-        { "sessionId": "archived-session-1", "title": "Earlier refactor", "updatedAt": "2026-09-20T08:30:00Z" }
-      ],
-      "complete": true
-    },
-    "sessionUnarchived": { "kind": "sessionUnarchived", "token": "unarchive-1", "sessionId": "archived-session-1" },
-    "sessionsWithoutGeneratedTitles": {
-      "kind": "sessions", "token": "untitled-history",
-      "sessions": [
-        { "sessionId": "file-only", "title": null, "updatedAt": null },
-        { "sessionId": "truncated", "title": null, "updatedAt": null },
-        { "sessionId": "normalized", "title": null, "updatedAt": null },
-        { "sessionId": "blank", "title": null, "updatedAt": null }
-      ]
-    },
-    "userMessageChunk": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "user_message_chunk", "content": { "type": "text", "text": "Explain this project" } }
-    },
-    "agentMessageChunk": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "agent_message_chunk", "content": { "type": "text", "text": "This project **builds** an IDE." } }
-    },
-    "claudeAutoModeNotice": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "notice", "severity": "warning", "title": "Auto mode unavailable", "description": "The selected model does not support Auto mode; using Accept edits instead." }
-    },
-    "agentThoughtChunk": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "agent_thought_chunk", "content": { "type": "text", "text": "Read the manifest first." } }
-    },
-    "plan": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "plan", "entries": [{ "content": "Read the manifest", "priority": "high", "status": "completed" }, { "content": "Run the tests", "priority": "medium", "status": "in_progress" }, { "content": "Summarize the results", "priority": "low", "status": "pending" }] }
-    },
-    "availableCommands": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "available_commands_update", "availableCommands": [{ "name": "review", "description": "Review the current changes", "input": { "hint": "optional focus" } }, { "name": "compact", "description": "Summarize the conversation to free context" }] }
-    },
-    "currentModeUpdate": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "current_mode_update", "currentModeId": "auto" }
-    },
-    "toolCall": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "tool_call", "toolCallId": "call-1", "title": "Run tests", "kind": "execute", "rawInput": { "command": "node --test" }, "locations": [{ "path": "src/main.js", "line": 1 }] }
-    },
-    "toolCallUpdate": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "tool_call_update", "toolCallId": "call-1", "status": "completed", "content": [{ "type": "content", "content": { "type": "text", "text": "1 test passed" } }], "rawOutput": { "exitCode": 0 } }
-    },
-    "fileEdit": {
-      "kind": "update", "sessionId": "session-1",
-      "update": { "sessionUpdate": "tool_call", "toolCallId": "edit-1", "title": "Edit sample.txt", "kind": "edit", "status": "completed", "content": [{ "type": "diff", "path": "sample.txt", "oldText": "before\n", "newText": "after\n", "_meta": { "kind": "update", "jetbrains": { "air": { "version": 1, "diffStats": { "version": 1, "added": 1, "removed": 1 } } } } }], "_meta": { "lithe": { "diffs": [{ "path": "sample.txt", "oldText": "before\n", "newText": "after\n", "operation": "update", "additions": 1, "deletions": 1, "truncated": false, "revertible": true }] } } }
-    },
-    "claudeFileCreated": {
-      "kind": "update", "sessionId": "session-1",
-      "update": { "sessionUpdate": "tool_call_update", "toolCallId": "write-create", "kind": "edit", "status": "completed", "content": [{ "type": "diff", "path": "created.txt", "newText": "created" }], "_meta": { "claudeCode": { "toolName": "Write", "toolResponse": { "type": "create", "filePath": "created.txt", "content": "created\n", "originalFile": null, "structuredPatch": [] } }, "lithe": { "diffs": [{ "path": "created.txt", "oldText": null, "newText": "created\n", "operation": "add", "additions": null, "deletions": null, "truncated": false, "revertible": true }] } } }
-    },
-    "claudeFileWriteUpdated": {
-      "kind": "update", "sessionId": "session-1",
-      "update": { "sessionUpdate": "tool_call_update", "toolCallId": "write-update", "kind": "edit", "status": "completed", "content": [{ "type": "diff", "path": "updated.txt", "oldText": "before", "newText": "after" }], "_meta": { "claudeCode": { "toolName": "Write", "toolResponse": { "type": "update", "filePath": "updated.txt", "content": "after\n", "originalFile": "before\n", "structuredPatch": [] } }, "lithe": { "diffs": [{ "path": "updated.txt", "oldText": "before\n", "newText": "after\n", "operation": "update", "additions": null, "deletions": null, "truncated": false, "revertible": true }] } } }
-    },
-    "codexRetry": {
-      "kind": "update", "sessionId": "session-1",
-      "update": { "sessionUpdate": "session_info_update", "_meta": { "codex": { "error": { "message": "Stream closed before completion; reconnecting.", "codexErrorInfo": null, "additionalDetails": null, "turnId": "upstream-turn-1", "willRetry": true } } } }
-    },
-    "codexNativeRetry": {
-      "kind": "update", "sessionId": "session-1",
-      "update": {"sessionUpdate": "session_info_update", "_meta": {"jetbrains": {"air": {"version": 1, "sessionFailure": {"id": "upstream-turn-1:error", "revision": 1, "category": "connection", "severity": "warning", "title": "{\"litheCodexFailure\":{\"message\":\"Local Codex fixture failure\",\"codexErrorInfo\":{\"responseStreamDisconnected\":{\"httpStatusCode\":503}},\"turnId\":\"upstream-turn-1\",\"willRetry\":true,\"activeTurn\":true,\"sequence\":1}}", "actions": []}}}}}
-    },
-    "sessionInfo": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "session_info_update", "title": "Project overview" }
-    },
-    "historicalUsageUpdate": {"kind": "update", "sessionId": "session-1", "update": {"sessionUpdate": "usage_update", "used": 125300, "size": 300000, "_meta": {"lithe": {"contextUsageSource": "history"}}}},
-    "usageUpdate": {
-      "kind": "update",
-      "sessionId": "session-1",
-      "update": { "sessionUpdate": "usage_update", "used": 18700, "size": 258400 }
-    },
-    "permission": {
-      "kind": "permission",
-      "sessionId": "session-1",
-      "requestId": "permission-1",
-      "request": {
-        "sessionId": "session-1",
-        "toolCall": { "toolCallId": "call-1", "title": "Run tests", "rawInput": { "command": "node --test" } },
-        "options": [
-          { "optionId": "allow_once", "name": "Allow Once", "kind": "allow_once" },
-          { "optionId": "reject_once", "name": "Reject", "kind": "reject_once" }
-        ]
-      }
-    },
-    "modelCall": {
-      "kind": "modelCall",
-      "sessionId": "session-1",
-      "call": {
-        "api": "anthropicMessages", "model": "claude-sonnet", "status": 200, "streaming": true,
-        "firstTokenMs": 820, "durationMs": 6400,
-        "usage": { "inputTokens": 1200, "cacheReadTokens": 42000, "cacheWriteTokens": 800, "outputTokens": 640 },
-        "context": { "systemPromptTokens": 4500, "toolTokens": 3500, "mcpToolTokens": 14000, "messageTokens": 22000, "toolCount": 18, "mcpToolCount": 40, "scaledToUsage": true }
-      },
-      "statistics": {
-        "requests": 1, "steps": 1, "failedSteps": 0, "nonStreamingSteps": 0, "durationMs": 6400,
-        "inputTokens": 1200, "cacheReadTokens": 42000, "cacheWriteTokens": 800, "outputTokens": 640, "callsWithUsage": 1,
-        "firstTokenMs": 820, "firstTokenCount": 1, "generationMs": 5580, "generatedTokens": 640,
-        "context": { "systemPromptTokens": 4500, "toolTokens": 3500, "mcpToolTokens": 14000, "messageTokens": 22000, "toolCount": 18, "mcpToolCount": 40, "scaledToUsage": true }
-      }
-    },
-    "modelCallAfterTurn": {
-      "kind": "modelCall",
-      "sessionId": "session-1",
-      "afterTurnFinished": true,
-      "call": {
-        "api": "anthropicMessages", "model": "claude-sonnet", "status": 200, "streaming": true,
-        "firstTokenMs": 820, "durationMs": 6400,
-        "usage": { "inputTokens": 1200, "cacheReadTokens": 42000, "cacheWriteTokens": 800, "outputTokens": 640 },
-        "context": { "systemPromptTokens": 4500, "toolTokens": 3500, "mcpToolTokens": 14000, "messageTokens": 22000, "toolCount": 18, "mcpToolCount": 40, "scaledToUsage": true }
-      },
-      "statistics": {
-        "requests": 1, "steps": 1, "failedSteps": 0, "nonStreamingSteps": 0, "durationMs": 6400,
-        "inputTokens": 1200, "cacheReadTokens": 42000, "cacheWriteTokens": 800, "outputTokens": 640, "callsWithUsage": 1,
-        "firstTokenMs": 820, "firstTokenCount": 1, "generationMs": 5580, "generatedTokens": 640,
-        "context": { "systemPromptTokens": 4500, "toolTokens": 3500, "mcpToolTokens": 14000, "messageTokens": 22000, "toolCount": 18, "mcpToolCount": 40, "scaledToUsage": true }
-      }
-    },
-    "modelCallNonStreaming": {
-      "kind": "modelCall",
-      "sessionId": "session-1",
-      "call": {
-        "api": "responses", "status": 200, "streaming": false, "durationMs": 3000,
-        "usage": { "inputTokens": 500, "cacheReadTokens": 0, "cacheWriteTokens": 0, "outputTokens": 300, "reasoningTokens": 100 }
-      },
-      "statistics": {
-        "requests": 1, "steps": 1, "failedSteps": 0, "nonStreamingSteps": 1, "durationMs": 3000,
-        "inputTokens": 500, "cacheReadTokens": 0, "cacheWriteTokens": 0, "outputTokens": 300, "reasoningTokens": 100, "callsWithUsage": 1,
-        "firstTokenMs": 0, "firstTokenCount": 0, "generationMs": 0, "generatedTokens": 0
-      }
-    },
-    "turnFinished": { "kind": "turnFinished", "sessionId": "session-1", "stopReason": "end_turn" },
-    "turnFinishedWithUsage": { "kind": "turnFinished", "sessionId": "session-1", "stopReason": "end_turn", "usage": { "totalTokens": 25000, "inputTokens": 18000, "outputTokens": 2000, "thoughtTokens": 1000, "cachedReadTokens": 3000, "cachedWriteTokens": 1000 } },
-    "turnCancelled": { "kind": "turnFinished", "sessionId": "session-1", "stopReason": "cancelled" },
-    "requestFailed": {
-      "kind": "requestFailed",
-      "token": null,
-      "sessionId": "session-1",
-      "message": "The Agent is still responding in this conversation"
-    },
-    "stopped": { "kind": "stopped", "message": "The Agent connection closed unexpectedly" }
-  },
-  "upstream": {
-    "codexSubscriptionObservation": {
-      "accountRead": {
-        "id": 1,
-        "result": {
-          "account": {
-            "type": "chatgpt",
-            "email": "person@example.test",
-            "planType": "plus"
-          },
-          "workspaceRouting": {
-            "chatgptAccountId": "fixture-account",
-            "backendOrigin": "https://chatgpt.com",
-            "accountRoutingOverride": "NO_CONSTRAINT"
-          }
-        }
-      },
-      "request": {
-        "type": "response.create",
-        "model": "test-model",
-        "instructions": "A fixed system prompt.",
-        "tools": [
-          {
-            "type": "function",
-            "name": "exec_command",
-            "parameters": {}
-          },
-          {
-            "type": "function",
-            "name": "mcp__files__read",
-            "parameters": {}
-          }
-        ],
-        "input": [
-          {
-            "role": "developer",
-            "content": "Project rules."
-          },
-          {
-            "role": "user",
-            "content": "Hello"
-          }
-        ]
-      }
-    },
-    "codexContextReplay": {"resumeRequest": {"id": 7, "method": "thread/resume", "params": {"threadId": "session-a", "excludeTurns": true, "modelProvider": "openai"}}, "resumeResponse": {"id": 7, "result": {"thread": {"id": "session-a"}}}, "notification": {"method": "thread/tokenUsage/updated", "params": {"threadId": "session-a", "turnId": "turn-a", "tokenUsage": {"last": {"totalTokens": 125300}, "total": {"totalTokens": 9000000}, "modelContextWindow": 300000}}}, "hostUpdate": {"sessionUpdate": "usage_update", "used": 125300, "size": 300000, "_meta": {"lithe": {"contextUsageSource": "history"}}}},
-    "codexFailureResponse": {
-      "stopReason": "end_turn", "_meta": {"jetbrains": {"air": {"version": 1, "sessionFailure": {"id": "upstream-turn-1:error", "revision": 5, "category": "connection", "severity": "error", "title": "{\"litheCodexFailure\":{\"message\":\"Local Codex fixture failure\",\"codexErrorInfo\":{\"httpConnectionFailed\":{\"httpStatusCode\":503}},\"turnId\":\"upstream-turn-1\",\"willRetry\":false,\"activeTurn\":true,\"sequence\":5}}", "actions": ["retry", "new_session"]}}}}
-    },
-    "claudeTemporaryFailureResponse": {
-      "stopReason": "end_turn", "_meta": { "jetbrains": { "air": { "version": 1, "sessionFailure": { "id": "upstream-turn-1:error", "revision": 1, "category": "service", "severity": "error", "title": "API Error: 503 No available channel", "actions": ["retry"] } } } }
-    },
-    "claudeSessionRouting": {
-      "provider": {"protocol": "anthropicMessages", "baseUrl": "https://gateway.example.com/v1/messages", "apiKey": "test-key-123", "name": "Example Claude", "model": "model-configured"},
-      "meta": {
-        "claudeCode": {
-          "options": {
-            "model": "model-configured",
-            "env": {"ANTHROPIC_BASE_URL": "https://gateway.example.com", "ANTHROPIC_API_KEY": "test-key-123", "ANTHROPIC_AUTH_TOKEN": "", "ANTHROPIC_CUSTOM_HEADERS": "", "CLAUDE_CODE_OAUTH_TOKEN": "", "CLAUDE_CODE_MAX_RETRIES": "0", "CLAUDE_CODE_RETRY_WATCHDOG": "0", "CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK": "1", "CLAUDE_CODE_USE_BEDROCK": "0", "CLAUDE_CODE_USE_VERTEX": "0", "CLAUDE_CODE_USE_FOUNDRY": "0", "CLAUDE_CODE_USE_ANTHROPIC_AWS": "0", "ANTHROPIC_BEDROCK_BASE_URL": "", "ANTHROPIC_VERTEX_BASE_URL": ""},
-            "settings": {
-              "apiKeyHelper": "",
-              "env": {"ANTHROPIC_BASE_URL": "https://gateway.example.com", "ANTHROPIC_API_KEY": "test-key-123", "ANTHROPIC_AUTH_TOKEN": "", "ANTHROPIC_CUSTOM_HEADERS": "", "CLAUDE_CODE_OAUTH_TOKEN": "", "CLAUDE_CODE_MAX_RETRIES": "0", "CLAUDE_CODE_RETRY_WATCHDOG": "0", "CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK": "1", "CLAUDE_CODE_USE_BEDROCK": "0", "CLAUDE_CODE_USE_VERTEX": "0", "CLAUDE_CODE_USE_FOUNDRY": "0", "CLAUDE_CODE_USE_ANTHROPIC_AWS": "0", "ANTHROPIC_BEDROCK_BASE_URL": "", "ANTHROPIC_VERTEX_BASE_URL": ""}
-            }
-          }
-        }
-      },
-      "restoredMeta": {
-        "claudeCode": {
-          "options": {
-            "env": {
-              "ANTHROPIC_BASE_URL": "https://gateway.example.com",
-              "ANTHROPIC_API_KEY": "test-key-123",
-              "ANTHROPIC_AUTH_TOKEN": "",
-              "ANTHROPIC_CUSTOM_HEADERS": "",
-              "CLAUDE_CODE_OAUTH_TOKEN": "",
-              "CLAUDE_CODE_MAX_RETRIES": "0",
-              "CLAUDE_CODE_RETRY_WATCHDOG": "0",
-              "CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK": "1",
-              "CLAUDE_CODE_USE_BEDROCK": "0",
-              "CLAUDE_CODE_USE_VERTEX": "0",
-              "CLAUDE_CODE_USE_FOUNDRY": "0",
-              "CLAUDE_CODE_USE_ANTHROPIC_AWS": "0",
-              "ANTHROPIC_BEDROCK_BASE_URL": "",
-              "ANTHROPIC_VERTEX_BASE_URL": ""
-            },
-            "settings": {
-              "apiKeyHelper": "",
-              "env": {
-                "ANTHROPIC_BASE_URL": "https://gateway.example.com",
-                "ANTHROPIC_API_KEY": "test-key-123",
-                "ANTHROPIC_AUTH_TOKEN": "",
-                "ANTHROPIC_CUSTOM_HEADERS": "",
-                "CLAUDE_CODE_OAUTH_TOKEN": "",
-                "CLAUDE_CODE_MAX_RETRIES": "0",
-                "CLAUDE_CODE_RETRY_WATCHDOG": "0",
-                "CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK": "1",
-                "CLAUDE_CODE_USE_BEDROCK": "0",
-                "CLAUDE_CODE_USE_VERTEX": "0",
-                "CLAUDE_CODE_USE_FOUNDRY": "0",
-                "CLAUDE_CODE_USE_ANTHROPIC_AWS": "0",
-                "ANTHROPIC_BEDROCK_BASE_URL": "",
-                "ANTHROPIC_VERTEX_BASE_URL": ""
-              }
-            }
-          }
-        }
-      }
-    },
-    "claudeRestoredSession": {
-      "configOptions": [
-        {
-          "id": "restored-model-selector",
-          "name": "Model",
-          "category": "model",
-          "type": "select",
-          "currentValue": "model-restored",
-          "options": [
-            {
-              "value": "model-restored",
-              "name": "Restored"
-            },
-            {
-              "value": "model-configured",
-              "name": "Default"
-            }
-          ]
-        },
-        {
-          "id": "mode",
-          "name": "Permission mode",
-          "category": "mode",
-          "type": "select",
-          "currentValue": "manual",
-          "options": [
-            {
-              "value": "manual",
-              "name": "Manual"
-            }
-          ]
-        },
-        {
-          "id": "effort",
-          "name": "Effort",
-          "type": "select",
-          "currentValue": "medium",
-          "options": [
-            {
-              "value": "medium",
-              "name": "Medium"
-            },
-            {
-              "value": "high",
-              "name": "High"
-            }
-          ]
-        }
-      ]
-    },
-    "promptResponseWithUsage": { "stopReason": "end_turn", "usage": { "totalTokens": 25000, "inputTokens": 18000, "outputTokens": 2000, "thoughtTokens": 1000, "cachedReadTokens": 3000, "cachedWriteTokens": 1000 } },
-    "staleModelSession": {
-      "sessionId": "session-repaired",
-      "models": {
-        "currentModelId": "model-retired[max]",
-        "availableModels": [
-          {
-            "modelId": "model-current[max]",
-            "name": "Current Max"
-          },
-          {
-            "modelId": "model-other[medium]",
-            "name": "Other Medium"
-          }
-        ]
-      },
-      "configOptions": [
-        {
-          "id": "model",
-          "name": "Model",
-          "category": "model",
-          "type": "select",
-          "currentValue": "model-retired",
-          "options": [
-            {
-              "value": "model-retired",
-              "name": "model-retired"
-            },
-            {
-              "value": "model-current",
-              "name": "model-current"
-            },
-            {
-              "value": "model-other",
-              "name": "model-other"
-            }
-          ],
-          "_meta": {
-            "jetbrains": {
-              "air": {
-                "version": 1,
-                "recommendedValue": "model-current"
-              }
-            }
-          }
-        }
-      ]
-    },
-    "repairedModelConfiguration": {
-      "configOptions": [
-        {
-          "id": "model",
-          "name": "Model",
-          "category": "model",
-          "type": "select",
-          "currentValue": "model-current",
-          "options": [
-            {
-              "value": "model-current",
-              "name": "model-current"
-            },
-            {
-              "value": "model-other",
-              "name": "model-other"
-            }
-          ],
-          "_meta": {
-            "jetbrains": {
-              "air": {
-                "version": 1,
-                "recommendedValue": "model-current"
-              }
-            }
-          }
-        }
-      ]
-    }
-  }
-}
diff --git a/rust/fixtures/agent/agent-instructions-v1.json b/rust/fixtures/agent/agent-instructions-v1.json
deleted file mode 100644
index 9a91a904..00000000
--- a/rust/fixtures/agent/agent-instructions-v1.json
+++ /dev/null
@@ -1,40 +0,0 @@
-{
-  "version": 1,
-  "readRequest": {
-    "command": "agent.instructions.read",
-    "payload": {
-      "agentId": "codex-acp"
-    }
-  },
-  "file": {
-    "agentId": "codex-acp",
-    "path": "/fixture/user/.codex/AGENTS.md",
-    "content": "# Working agreements\nUse concise replies.\n",
-    "exists": true,
-    "revision": "5b94dd8e0a4a42bab37c0b1b7bb3d36e15d6cda57bb6cd32de40f2060e051228"
-  },
-  "saveRequest": {
-    "command": "agent.instructions.save",
-    "payload": {
-      "agentId": "codex-acp",
-      "content": "# Updated\n",
-      "expectedPath": "/fixture/user/.codex/AGENTS.md",
-      "expectedRevision": "5b94dd8e0a4a42bab37c0b1b7bb3d36e15d6cda57bb6cd32de40f2060e051228"
-    }
-  },
-  "windowsFile": {
-    "agentId": "claude-acp",
-    "path": "C:\\Users\\fixture\\.claude\\CLAUDE.md",
-    "content": "Claude only",
-    "exists": true,
-    "revision": "6200025904539440f7dde4fa1a3a0ca731c61c31bc8f0d188acf741caf0bdd40"
-  },
-  "conflict": {
-    "ok": false,
-    "error": {
-      "code": "invalid_request",
-      "message": "Global instructions changed outside this editor. Your draft is kept; reload before saving.",
-      "details": "file_changed"
-    }
-  }
-}
diff --git a/rust/fixtures/agent/agent-management-v1.json b/rust/fixtures/agent/agent-management-v1.json
deleted file mode 100644
index a0a9bcc9..00000000
--- a/rust/fixtures/agent/agent-management-v1.json
+++ /dev/null
@@ -1,212 +0,0 @@
-{
-  "version": 1,
-  "requests": {
-    "status": {
-      "command": "agent.status",
-      "payload": {
-        "dataDirectory": "/Users/example/Library/Application Support/Lithe"
-      }
-    },
-    "install": {
-      "command": "agent.install",
-      "payload": {
-        "dataDirectory": "/Users/example/Library/Application Support/Lithe",
-        "agentId": "codex-acp"
-      }
-    },
-    "uninstall": {
-      "command": "agent.uninstall",
-      "payload": {
-        "dataDirectory": "/Users/example/Library/Application Support/Lithe",
-        "agentId": "codex-acp"
-      }
-    },
-    "installCli": {
-      "command": "agent.installCli",
-      "payload": {
-        "dataDirectory": "/Users/example/Library/Application Support/Lithe",
-        "agentId": "codex-acp"
-      }
-    }
-  },
-  "responses": {
-    "status": {
-      "environment": {
-        "node": {
-          "version": "20.11.0",
-          "path": "/opt/example/node/bin/node"
-        },
-        "npm": {
-          "version": "10.2.4",
-          "path": "/opt/example/node/bin/npm"
-        },
-        "usedLoginShell": true
-      },
-      "agents": [
-        {
-          "id": "codex-acp",
-          "name": "Codex",
-          "description": "OpenAI Codex through its ACP adapter",
-          "package": "@agentclientprotocol/codex-acp",
-          "version": "2.2.2",
-          "installedVersion": "2.2.2",
-          "protocol": "responses",
-          "minimumNodeMajor": 20,
-          "verified": true,
-          "cli": {
-            "name": "Codex CLI",
-            "command": "codex",
-            "minimumVersion": "0.160.1",
-            "installHint": "npm install -g @openai/codex",
-            "detected": {
-              "version": "0.160.1",
-              "path": "/opt/example/node/bin/codex"
-            },
-            "package": "@openai/codex",
-            "installation": {
-              "source": "npm",
-              "canUpdate": true,
-              "updateHint": "npm install -g @openai/codex",
-              "updateAvailable": true,
-              "availableVersion": "0.161.1"
-            }
-          },
-          "issues": [],
-          "updateAvailable": false
-        },
-        {
-          "id": "claude-acp",
-          "name": "Claude",
-          "description": "Claude Agent through its ACP adapter",
-          "package": "@agentclientprotocol/claude-agent-acp",
-          "version": "0.95.0",
-          "installedVersion": null,
-          "protocol": "anthropicMessages",
-          "minimumNodeMajor": 22,
-          "verified": false,
-          "cli": {
-            "name": "Claude Code",
-            "command": "claude",
-            "minimumVersion": "2.1.309",
-            "installHint": "npm install -g @anthropic-ai/claude-code",
-            "detected": null,
-            "package": "@anthropic-ai/claude-code",
-            "installation": {
-              "source": "missing",
-              "canUpdate": true,
-              "updateHint": "npm install -g @anthropic-ai/claude-code"
-            }
-          },
-          "issues": [
-            "Claude needs Node.js 22 or later; found 20.11.0.",
-            "Claude Code was not found. Install it (for example `npm install -g @anthropic-ai/claude-code`), then check again."
-          ]
-        }
-      ]
-    },
-    "install": {
-      "agentId": "codex-acp",
-      "installedVersion": "2.2.2"
-    },
-    "uninstall": {
-      "agentId": "codex-acp"
-    },
-    "installCli": {
-      "agentId": "codex-acp",
-      "cliVersion": "0.160.1",
-      "updaterWarning": null
-    },
-    "installCliRecovered": {
-      "agentId": "codex-acp",
-      "cliVersion": "0.161.1",
-      "updaterWarning": "Download failed; retry completed"
-    }
-  },
-  "events": {
-    "preparing": {
-      "kind": "agentInstallProgress",
-      "operationId": "install-example",
-      "progress": {
-        "stage": "preparing",
-        "downloadedBytes": 0,
-        "bytesPerSecond": 0,
-        "elapsedMilliseconds": 0,
-        "idleMilliseconds": 0
-      }
-    },
-    "downloading": {
-      "kind": "agentInstallProgress",
-      "operationId": "install-example",
-      "progress": {
-        "stage": "downloading",
-        "downloadedBytes": 25000000,
-        "bytesPerSecond": 75000,
-        "elapsedMilliseconds": 300000,
-        "idleMilliseconds": 0
-      }
-    },
-    "waiting": {
-      "kind": "agentInstallProgress",
-      "operationId": "install-example",
-      "progress": {
-        "stage": "downloading",
-        "downloadedBytes": 25000000,
-        "bytesPerSecond": 0,
-        "elapsedMilliseconds": 320000,
-        "idleMilliseconds": 20000
-      }
-    },
-    "updating": {
-      "kind": "agentInstallProgress",
-      "operationId": "install-example",
-      "progress": {
-        "stage": "updating",
-        "downloadedBytes": 0,
-        "bytesPerSecond": 0,
-        "elapsedMilliseconds": 0,
-        "idleMilliseconds": 0
-      }
-    }
-  },
-  "cliInstallations": {
-    "npm": {
-      "source": "npm",
-      "canUpdate": true,
-      "updateHint": "npm install -g @openai/codex",
-      "updateAvailable": true,
-      "availableVersion": "0.161.1"
-    },
-    "homebrew": {
-      "source": "homebrew",
-      "canUpdate": true,
-      "updateHint": "brew upgrade --cask codex",
-      "updateAvailable": true
-    },
-    "native": {
-      "source": "native",
-      "canUpdate": true,
-      "updateHint": "claude update"
-    },
-    "missing": {
-      "source": "missing",
-      "canUpdate": true,
-      "updateHint": "npm install -g @anthropic-ai/claude-code"
-    },
-    "unknown": {
-      "source": "unknown",
-      "canUpdate": false,
-      "updateHint": "Update this CLI using its original installer, then check again."
-    },
-    "npmEnvironmentMismatch": {
-      "source": "npm",
-      "canUpdate": false,
-      "updateHint": "Switch to the Node.js/npm environment that installed this CLI, update it there, then check again."
-    },
-    "npmCheckFailed": {
-      "source": "npm",
-      "canUpdate": true,
-      "updateHint": "npm install -g @example/agent",
-      "updateCheckError": "Network request failed: connection refused"
-    }
-  }
-}
diff --git a/rust/fixtures/agent/attachment-retention-v1.json b/rust/fixtures/agent/attachment-retention-v1.json
deleted file mode 100644
index 2fa8ebf1..00000000
--- a/rust/fixtures/agent/attachment-retention-v1.json
+++ /dev/null
@@ -1,359 +0,0 @@
-{
-  "command": "agent.attachments.retentionPlan",
-  "description": "Retention plan for pasted Agent images shared by macOS and Windows. Images that any conversation accepted are kept; abandoned pastes and unreferenced images older than seven days are deleted by the platform.",
-  "cases": [
-    {
-      "name": "recent unreferenced image is kept",
-      "request": {
-        "nowMs": 1800000000000,
-        "entries": [
-          {
-            "path": "/c/a.png",
-            "modifiedMs": 1799913600000
-          }
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [],
-        "keep": [
-          {
-            "path": "/c/a.png",
-            "reason": "recent"
-          }
-        ],
-        "seed": []
-      }
-    },
-    {
-      "name": "old referenced image is kept",
-      "request": {
-        "nowMs": 1800000000000,
-        "entries": [
-          {
-            "path": "/c/a.png",
-            "modifiedMs": 1797408000000
-          }
-        ],
-        "acceptedReferences": [
-          "/c/a.png"
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [],
-        "keep": [
-          {
-            "path": "/c/a.png",
-            "reason": "referenced"
-          }
-        ],
-        "seed": []
-      }
-    },
-    {
-      "name": "old unreferenced image expires",
-      "request": {
-        "nowMs": 1800000000000,
-        "entries": [
-          {
-            "path": "/c/a.png",
-            "modifiedMs": 1799308800000
-          }
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [
-          {
-            "path": "/c/a.png",
-            "reason": "expired"
-          }
-        ],
-        "keep": [],
-        "seed": []
-      }
-    },
-    {
-      "name": "exactly seven days is still kept",
-      "request": {
-        "nowMs": 1800000000000,
-        "entries": [
-          {
-            "path": "/c/a.png",
-            "modifiedMs": 1799395200000
-          }
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [],
-        "keep": [
-          {
-            "path": "/c/a.png",
-            "reason": "recent"
-          }
-        ],
-        "seed": []
-      }
-    },
-    {
-      "name": "abandoned paste is deleted at once",
-      "request": {
-        "nowMs": 1800000000000,
-        "entries": [
-          {
-            "path": "/c/a.png",
-            "modifiedMs": 1800000000000,
-            "abandoned": true
-          }
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [
-          {
-            "path": "/c/a.png",
-            "reason": "abandoned"
-          }
-        ],
-        "keep": [],
-        "seed": []
-      }
-    },
-    {
-      "name": "referenced image survives an abandoned flag",
-      "request": {
-        "nowMs": 1800000000000,
-        "entries": [
-          {
-            "path": "/c/a.png",
-            "modifiedMs": 1800000000000,
-            "abandoned": true
-          }
-        ],
-        "acceptedReferences": [
-          "/c/a.png"
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [],
-        "keep": [
-          {
-            "path": "/c/a.png",
-            "reason": "referenced"
-          }
-        ],
-        "seed": []
-      }
-    },
-    {
-      "name": "unknown age is never expired",
-      "request": {
-        "nowMs": 1800000000000,
-        "entries": [
-          {
-            "path": "/c/a.png"
-          }
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [],
-        "keep": [
-          {
-            "path": "/c/a.png",
-            "reason": "recent"
-          }
-        ],
-        "seed": []
-      }
-    },
-    {
-      "name": "windows paths compare by separator and case",
-      "request": {
-        "nowMs": 1800000000000,
-        "caseInsensitive": true,
-        "entries": [
-          {
-            "path": "C:\\Cache\\Pasted-1.PNG",
-            "modifiedMs": 1797408000000
-          }
-        ],
-        "acceptedReferences": [
-          "c:/cache/pasted-1.png"
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [],
-        "keep": [
-          {
-            "path": "C:\\Cache\\Pasted-1.PNG",
-            "reason": "referenced"
-          }
-        ],
-        "seed": []
-      }
-    },
-    {
-      "name": "case differs on a case-sensitive platform",
-      "request": {
-        "nowMs": 1800000000000,
-        "entries": [
-          {
-            "path": "/c/A.png",
-            "modifiedMs": 1797408000000
-          }
-        ],
-        "acceptedReferences": [
-          "/c/a.png"
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [
-          {
-            "path": "/c/A.png",
-            "reason": "expired"
-          }
-        ],
-        "keep": [],
-        "seed": []
-      }
-    },
-    {
-      "name": "mixed cache keeps order within each list",
-      "request": {
-        "nowMs": 1800000000000,
-        "entries": [
-          {
-            "path": "/c/1.png",
-            "modifiedMs": 1797408000000
-          },
-          {
-            "path": "/c/2.png",
-            "modifiedMs": 1797408000000
-          },
-          {
-            "path": "/c/3.png",
-            "modifiedMs": 1799827200000
-          },
-          {
-            "path": "/c/4.png",
-            "modifiedMs": 1799222400000
-          }
-        ],
-        "acceptedReferences": [
-          "/c/2.png"
-        ],
-        "ledgerPresent": true
-      },
-      "expected": {
-        "delete": [
-          {
-            "path": "/c/1.png",
-            "reason": "expired"
-          },
-          {
-            "path": "/c/4.png",
-            "reason": "expired"
-          }
-        ],
-        "keep": [
-          {
-            "path": "/c/2.png",
-            "reason": "referenced"
-          },
-          {
-            "path": "/c/3.png",
-            "reason": "recent"
-          }
-        ],
-        "seed": []
-      }
-    },
-    {
-      "name": "missing ledger seeds every cached image and keeps old ones",
-      "request": {
-        "nowMs": 1800000000000,
-        "ledgerPresent": false,
-        "entries": [
-          {
-            "path": "/c/old.png",
-            "modifiedMs": 1797408000000
-          },
-          {
-            "path": "/c/new.png",
-            "modifiedMs": 1799913600000
-          }
-        ]
-      },
-      "expected": {
-        "delete": [],
-        "keep": [
-          {
-            "path": "/c/old.png",
-            "reason": "referenced"
-          },
-          {
-            "path": "/c/new.png",
-            "reason": "referenced"
-          }
-        ],
-        "seed": [
-          "/c/old.png",
-          "/c/new.png"
-        ]
-      }
-    },
-    {
-      "name": "empty ledger that exists does not migrate again",
-      "request": {
-        "nowMs": 1800000000000,
-        "ledgerPresent": true,
-        "acceptedReferences": [],
-        "entries": [
-          {
-            "path": "/c/old.png",
-            "modifiedMs": 1797408000000
-          }
-        ]
-      },
-      "expected": {
-        "delete": [
-          {
-            "path": "/c/old.png",
-            "reason": "expired"
-          }
-        ],
-        "keep": [],
-        "seed": []
-      }
-    },
-    {
-      "name": "missing ledger never seeds an abandoned paste",
-      "request": {
-        "nowMs": 1800000000000,
-        "ledgerPresent": false,
-        "entries": [
-          {
-            "path": "/c/gone.png",
-            "abandoned": true
-          }
-        ]
-      },
-      "expected": {
-        "delete": [
-          {
-            "path": "/c/gone.png",
-            "reason": "abandoned"
-          }
-        ],
-        "keep": [],
-        "seed": []
-      }
-    }
-  ]
-}
diff --git a/rust/fixtures/agent/claude-desktop-cards-v1.json b/rust/fixtures/agent/claude-desktop-cards-v1.json
deleted file mode 100644
index 479dcba5..00000000
--- a/rust/fixtures/agent/claude-desktop-cards-v1.json
+++ /dev/null
@@ -1,540 +0,0 @@
-{
-  "schemaVersion": 1,
-  "description": "Claude Desktop tool calls as a host receives them (updates) and as lithe-agent-host presents them to clients (presented), in order. Cards are in _meta.lithe.claudeDesktop; see rust/contracts/application-boundary.md.",
-  "cases": [
-    {
-      "name": "chapter",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "c",
-          "name": "mcp__ccd_session__mark_chapter",
-          "title": "mcp__ccd_session__mark_chapter",
-          "status": "pending",
-          "rawInput": {
-            "title": "Core",
-            "summary": "Rust first"
-          }
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "c",
-          "status": "completed"
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "c",
-          "name": "mcp__ccd_session__mark_chapter",
-          "title": "Chapter: Core",
-          "status": "pending",
-          "rawInput": {
-            "title": "Core",
-            "summary": "Rust first"
-          },
-          "_meta": {
-            "lithe": {
-              "claudeDesktop": {
-                "card": "chapter",
-                "title": "Core",
-                "summary": "Rust first"
-              }
-            }
-          },
-          "kind": "other"
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "c",
-          "status": "completed"
-        }
-      ]
-    },
-    {
-      "name": "next-step-from-wrap-up",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "w",
-          "name": "mcp__ccd_turn__wrap_up",
-          "title": "mcp__ccd_turn__wrap_up",
-          "status": "pending",
-          "rawInput": {
-            "recap": "PR opened.",
-            "ask": "Mark it ready?",
-            "actions": [
-              {
-                "label": "Yes",
-                "message": "yes"
-              },
-              {
-                "label": "Not now"
-              }
-            ]
-          }
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "w",
-          "status": "completed"
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "agent_message_chunk",
-          "content": {
-            "type": "text",
-            "text": "PR opened.\n\nMark it ready?"
-          }
-        },
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "w#next",
-          "title": "Suggested replies",
-          "kind": "other",
-          "status": "completed",
-          "_meta": {
-            "lithe": {
-              "claudeDesktop": {
-                "card": "nextStep",
-                "actions": [
-                  {
-                    "label": "Yes",
-                    "message": "yes"
-                  }
-                ]
-              }
-            }
-          }
-        }
-      ]
-    },
-    {
-      "name": "task-proposed-then-withdrawn",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "t1",
-          "name": "mcp__ccd_session__spawn_task",
-          "title": "mcp__ccd_session__spawn_task",
-          "status": "pending",
-          "rawInput": {
-            "title": "Fix",
-            "tldr": "Why",
-            "prompt": "Do it"
-          }
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "t1",
-          "status": "completed",
-          "content": [
-            {
-              "type": "content",
-              "content": {
-                "type": "text",
-                "text": "Noted (position 1, task_id: task_9edecafe). A chip is showing"
-              }
-            }
-          ]
-        },
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "x",
-          "name": "mcp__ccd_session__dismiss_task",
-          "title": "mcp__ccd_session__dismiss_task",
-          "status": "pending",
-          "rawInput": {
-            "task_id": "task_9edecafe"
-          }
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "x",
-          "status": "completed",
-          "content": [
-            {
-              "type": "content",
-              "content": {
-                "type": "text",
-                "text": "Task task_9edecafe withdrawn"
-              }
-            }
-          ]
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "t1",
-          "name": "mcp__ccd_session__spawn_task",
-          "title": "Suggested task: Fix",
-          "status": "pending",
-          "rawInput": {
-            "title": "Fix",
-            "tldr": "Why",
-            "prompt": "Do it"
-          },
-          "_meta": {
-            "lithe": {
-              "claudeDesktop": {
-                "card": "task",
-                "title": "Fix",
-                "summary": "Why",
-                "prompt": "Do it",
-                "state": "proposed"
-              }
-            }
-          },
-          "kind": "other"
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "t1",
-          "status": "completed",
-          "content": [
-            {
-              "type": "content",
-              "content": {
-                "type": "text",
-                "text": "Noted (position 1, task_id: task_9edecafe). A chip is showing"
-              }
-            }
-          ]
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "t1",
-          "_meta": {
-            "lithe": {
-              "claudeDesktop": {
-                "card": "task",
-                "title": "Fix",
-                "summary": "Why",
-                "prompt": "Do it",
-                "state": "withdrawn"
-              }
-            }
-          }
-        }
-      ]
-    },
-    {
-      "name": "task-handed-off",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "h",
-          "name": "mcp__ccd_session__hand_off_to_session",
-          "title": "mcp__ccd_session__hand_off_to_session",
-          "status": "pending",
-          "rawInput": {
-            "title": "Stats",
-            "remaining_plan": "\nDone: x\nNext: y"
-          }
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "h",
-          "status": "completed"
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "h",
-          "name": "mcp__ccd_session__hand_off_to_session",
-          "title": "Suggested task: Stats",
-          "status": "pending",
-          "rawInput": {
-            "title": "Stats",
-            "remaining_plan": "\nDone: x\nNext: y"
-          },
-          "_meta": {
-            "lithe": {
-              "claudeDesktop": {
-                "card": "task",
-                "title": "Stats",
-                "summary": "Done: x",
-                "prompt": "Done: x\nNext: y",
-                "state": "handedOff"
-              }
-            }
-          },
-          "kind": "other"
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "h",
-          "status": "completed"
-        }
-      ]
-    },
-    {
-      "name": "pull-request-monitored",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "p",
-          "name": "mcp__ccd_pr__set_monitor",
-          "title": "mcp__ccd_pr__set_monitor",
-          "status": "pending",
-          "rawInput": {
-            "url": "https://github.com/o/r/pull/31",
-            "auto_fix": true
-          }
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "p",
-          "status": "completed"
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "p",
-          "name": "mcp__ccd_pr__set_monitor",
-          "title": "Pull request https://github.com/o/r/pull/31",
-          "status": "pending",
-          "rawInput": {
-            "url": "https://github.com/o/r/pull/31",
-            "auto_fix": true
-          },
-          "_meta": {
-            "lithe": {
-              "claudeDesktop": {
-                "card": "pullRequest",
-                "action": "monitored",
-                "url": "https://github.com/o/r/pull/31",
-                "number": 31,
-                "autoFix": true
-              }
-            }
-          },
-          "kind": "other"
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "p",
-          "status": "completed"
-        }
-      ]
-    },
-    {
-      "name": "pull-request-auto-merge",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "m",
-          "name": "mcp__ccd_pr__set_auto_merge",
-          "title": "mcp__ccd_pr__set_auto_merge",
-          "status": "pending",
-          "rawInput": {
-            "url": "https://github.com/o/r/pull/7",
-            "enabled": false
-          }
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "m",
-          "status": "completed"
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "m",
-          "name": "mcp__ccd_pr__set_auto_merge",
-          "title": "Pull request https://github.com/o/r/pull/7",
-          "status": "pending",
-          "rawInput": {
-            "url": "https://github.com/o/r/pull/7",
-            "enabled": false
-          },
-          "_meta": {
-            "lithe": {
-              "claudeDesktop": {
-                "card": "pullRequest",
-                "action": "autoMerge",
-                "url": "https://github.com/o/r/pull/7",
-                "number": 7,
-                "enabled": false
-              }
-            }
-          },
-          "kind": "other"
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "m",
-          "status": "completed"
-        }
-      ]
-    },
-    {
-      "name": "directory-requested",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "d",
-          "name": "mcp__ccd_directory__request_directory",
-          "title": "mcp__ccd_directory__request_directory",
-          "status": "pending",
-          "rawInput": {
-            "path": "/w/other"
-          }
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "d",
-          "status": "completed"
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "d",
-          "name": "mcp__ccd_directory__request_directory",
-          "title": "Working folder /w/other",
-          "status": "pending",
-          "rawInput": {
-            "path": "/w/other"
-          },
-          "_meta": {
-            "lithe": {
-              "claudeDesktop": {
-                "card": "directory",
-                "action": "requested",
-                "path": "/w/other"
-              }
-            }
-          },
-          "kind": "other"
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "d",
-          "status": "completed"
-        }
-      ]
-    },
-    {
-      "name": "widget",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "v",
-          "name": "mcp__visualize__show_widget",
-          "title": "mcp__visualize__show_widget",
-          "status": "pending",
-          "rawInput": {
-            "title": "vcs_layers",
-            "widget_code": "<svg/>"
-          }
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "v",
-          "status": "completed"
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "v",
-          "name": "mcp__visualize__show_widget",
-          "title": "Visualization: vcs layers",
-          "status": "pending",
-          "rawInput": {
-            "title": "vcs_layers",
-            "widget_code": "<svg/>"
-          },
-          "_meta": {
-            "lithe": {
-              "claudeDesktop": {
-                "card": "widget",
-                "title": "vcs layers",
-                "code": "<svg/>"
-              }
-            }
-          },
-          "kind": "other"
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "v",
-          "status": "completed"
-        }
-      ]
-    },
-    {
-      "name": "readable-row-without-card",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "g",
-          "name": "mcp__ccd_pr__get_status",
-          "title": "mcp__ccd_pr__get_status",
-          "status": "pending",
-          "rawInput": {}
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "g",
-          "status": "completed"
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "g",
-          "name": "mcp__ccd_pr__get_status",
-          "title": "Checked the pull request status",
-          "status": "pending",
-          "rawInput": {},
-          "kind": "read"
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "g",
-          "status": "completed"
-        }
-      ]
-    },
-    {
-      "name": "unknown-server-passes-through",
-      "updates": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "u",
-          "name": "mcp__dbx__list_connections",
-          "title": "mcp__dbx__list_connections",
-          "status": "pending",
-          "rawInput": {}
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "u",
-          "status": "completed"
-        }
-      ],
-      "presented": [
-        {
-          "sessionUpdate": "tool_call",
-          "toolCallId": "u",
-          "name": "mcp__dbx__list_connections",
-          "title": "mcp__dbx__list_connections",
-          "status": "pending",
-          "rawInput": {}
-        },
-        {
-          "sessionUpdate": "tool_call_update",
-          "toolCallId": "u",
-          "status": "completed"
-        }
-      ]
-    }
-  ]
-}
diff --git a/rust/fixtures/agent/edit-review-v1.json b/rust/fixtures/agent/edit-review-v1.json
deleted file mode 100644
index 285855fc..00000000
--- a/rust/fixtures/agent/edit-review-v1.json
+++ /dev/null
@@ -1,1087 +0,0 @@
-{
-  "description": "Agent edit evidence normalization (Host annotation `_meta.lithe.diffs`) and `agent.edits.reversePlan`. Text values may be {repeat, count, suffix?} and expand to repeat×count followed by suffix. Limits count Unicode scalar values.",
-  "textLimitScalars": 32768,
-  "contentLimit": 100,
-  "evidence": [
-    {
-      "name": "plain diff",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": "one",
-            "newText": "two"
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": "one",
-          "newText": "two",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "null previous text without creation metadata is an insertion, not revertible",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": null,
-            "newText": "inserted"
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": null,
-          "newText": "inserted",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": false,
-          "revertible": false
-        }
-      ]
-    },
-    {
-      "name": "explicit creation metadata makes null previous text revertible",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": null,
-            "newText": "created",
-            "_meta": {
-              "kind": "add"
-            }
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": null,
-          "newText": "created",
-          "operation": "add",
-          "additions": null,
-          "deletions": null,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "missing newText keeps the hunk as incomplete evidence instead of dropping it",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": "one"
-          },
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": "two",
-            "newText": "three"
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": "one",
-          "newText": "",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": true,
-          "revertible": false
-        },
-        {
-          "path": "a.txt",
-          "oldText": "two",
-          "newText": "three",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "upstream truncation flag",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": "one",
-            "newText": "two",
-            "isTruncated": true
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": "one",
-          "newText": "two",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": true,
-          "revertible": false
-        }
-      ]
-    },
-    {
-      "name": "20000 emoji: 40000 UTF-16 units but 20000 scalars stay complete",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": {
-              "repeat": "😀",
-              "count": 20000
-            },
-            "newText": "x"
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": {
-            "repeat": "😀",
-            "count": 20000
-          },
-          "newText": "x",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "20000 combining sequences: 20000 graphemes but 40000 scalars are truncated",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": "x",
-            "newText": {
-              "repeat": "é",
-              "count": 20000
-            }
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": "x",
-          "newText": {
-            "repeat": "é",
-            "count": 16384,
-            "suffix": "\n[...]"
-          },
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": true,
-          "revertible": false
-        }
-      ]
-    },
-    {
-      "name": "CJK text exactly at the scalar limit stays complete",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": {
-              "repeat": "汉",
-              "count": 32768
-            },
-            "newText": "x"
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": {
-            "repeat": "汉",
-            "count": 32768
-          },
-          "newText": "x",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "CJK text one scalar over the limit is truncated",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": {
-              "repeat": "汉",
-              "count": 32769
-            },
-            "newText": "x"
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": {
-            "repeat": "汉",
-            "count": 32768,
-            "suffix": "\n[...]"
-          },
-          "newText": "x",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": true,
-          "revertible": false
-        }
-      ]
-    },
-    {
-      "name": "version 1 diff statistics are kept",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": "a",
-            "newText": "b",
-            "_meta": {
-              "jetbrains": {
-                "air": {
-                  "diffStats": {
-                    "version": 1,
-                    "added": 3,
-                    "removed": 2
-                  }
-                }
-              }
-            }
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": "a",
-          "newText": "b",
-          "operation": null,
-          "additions": 3,
-          "deletions": 2,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "unknown statistics versions stay unknown",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": "a",
-            "newText": "b",
-            "_meta": {
-              "jetbrains": {
-                "air": {
-                  "diffStats": {
-                    "version": 2,
-                    "added": 3,
-                    "removed": 2
-                  }
-                }
-              }
-            }
-          }
-        ]
-      },
-      "expected": [
-        {
-          "path": "a.txt",
-          "oldText": "a",
-          "newText": "b",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "Claude Write create replaces newline-less hunks",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "w.txt",
-            "oldText": null,
-            "newText": "fragment"
-          }
-        ],
-        "_meta": {
-          "claudeCode": {
-            "toolName": "Write",
-            "toolResponse": {
-              "type": "create",
-              "filePath": "w.txt",
-              "content": "whole\nfile\n"
-            }
-          }
-        }
-      },
-      "expected": [
-        {
-          "path": "w.txt",
-          "oldText": null,
-          "newText": "whole\nfile\n",
-          "operation": "add",
-          "additions": null,
-          "deletions": null,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "Claude Write update keeps complete statistics of the same update",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "w.txt",
-            "oldText": "a",
-            "newText": "b",
-            "_meta": {
-              "jetbrains": {
-                "air": {
-                  "diffStats": {
-                    "version": 1,
-                    "added": 1,
-                    "removed": 1
-                  }
-                }
-              }
-            }
-          }
-        ],
-        "_meta": {
-          "claudeCode": {
-            "toolName": "Write",
-            "toolResponse": {
-              "type": "update",
-              "filePath": "w.txt",
-              "content": "b\n",
-              "originalFile": "a\n"
-            }
-          }
-        }
-      },
-      "expected": [
-        {
-          "path": "w.txt",
-          "oldText": "a\n",
-          "newText": "b\n",
-          "operation": "update",
-          "additions": 1,
-          "deletions": 1,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "Claude Write update without the original file is ignored",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "diff",
-            "path": "w.txt",
-            "oldText": "a",
-            "newText": "b"
-          }
-        ],
-        "_meta": {
-          "claudeCode": {
-            "toolName": "Write",
-            "toolResponse": {
-              "type": "update",
-              "filePath": "w.txt",
-              "content": "b\n"
-            }
-          }
-        }
-      },
-      "expected": [
-        {
-          "path": "w.txt",
-          "oldText": "a",
-          "newText": "b",
-          "operation": null,
-          "additions": null,
-          "deletions": null,
-          "truncated": false,
-          "revertible": true
-        }
-      ]
-    },
-    {
-      "name": "content without diffs clears the evidence",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "content": [
-          {
-            "type": "content",
-            "content": {
-              "type": "text",
-              "text": "done"
-            }
-          }
-        ]
-      },
-      "expected": []
-    },
-    {
-      "name": "an update without content keeps earlier evidence",
-      "update": {
-        "sessionUpdate": "tool_call_update",
-        "toolCallId": "tool-1",
-        "status": "completed",
-        "title": "Edit"
-      },
-      "expected": null
-    },
-    {
-      "name": "non-tool updates are not annotated",
-      "update": {
-        "sessionUpdate": "agent_message_chunk",
-        "content": [
-          {
-            "type": "diff",
-            "path": "a.txt",
-            "oldText": "a",
-            "newText": "b"
-          }
-        ]
-      },
-      "expected": null
-    }
-  ],
-  "reversePlan": [
-    {
-      "name": "reverses chained edits newest first around unrelated text",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "one",
-            "newText": "two",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          },
-          {
-            "oldText": "two",
-            "newText": "three",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "before\nthree\nafter"
-      },
-      "expected": {
-        "action": "write",
-        "text": "before\none\nafter"
-      }
-    },
-    {
-      "name": "complete snapshot matches verbatim",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "A\n",
-            "newText": "B\n",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          },
-          {
-            "oldText": "B\n",
-            "newText": "C\n",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "C\n"
-      },
-      "expected": {
-        "action": "write",
-        "text": "A\n"
-      }
-    },
-    {
-      "name": "LF evidence reverses inside a CRLF file",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "before\n",
-            "newText": "after\n",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "before\r\nafter\r\n"
-      },
-      "expected": {
-        "action": "write",
-        "text": "before\r\nbefore\r\n"
-      }
-    },
-    {
-      "name": "LF snapshot reverses a CRLF file",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "before\n",
-            "newText": "after\n",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "after\r\n"
-      },
-      "expected": {
-        "action": "write",
-        "text": "before\r\n"
-      }
-    },
-    {
-      "name": "mixed line endings rewrite only the matched span",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "before\nend\n",
-            "newText": "after\nend\n",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "keep\r\nx\nafter\nend\r\n"
-      },
-      "expected": {
-        "action": "write",
-        "text": "keep\r\nx\nbefore\r\nend\r\n"
-      }
-    },
-    {
-      "name": "ambiguous excerpt is a conflict",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "old",
-            "newText": "new",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "new new"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "changed"
-      }
-    },
-    {
-      "name": "missing excerpt is a conflict",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "old",
-            "newText": "new",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "unrelated"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "changed"
-      }
-    },
-    {
-      "name": "overlapping exact excerpts are ambiguous",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "x",
-            "newText": "aba",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "ababa"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "changed"
-      }
-    },
-    {
-      "name": "overlapping canonical excerpts are ambiguous",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "x",
-            "newText": "a\nb\na",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "a\nb\r\na\nb\r\na"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "changed"
-      }
-    },
-    {
-      "name": "empty excerpt never matches",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "x",
-            "newText": "",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "abc"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "changed"
-      }
-    },
-    {
-      "name": "insertion without creation metadata is incomplete",
-      "request": {
-        "diffs": [
-          {
-            "oldText": null,
-            "newText": "inserted",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "a inserted"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "incomplete"
-      }
-    },
-    {
-      "name": "creation removes only the exact created content",
-      "request": {
-        "diffs": [
-          {
-            "oldText": null,
-            "newText": "created",
-            "operation": "add",
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "created"
-      },
-      "expected": {
-        "action": "trash"
-      }
-    },
-    {
-      "name": "creation matches across line endings",
-      "request": {
-        "diffs": [
-          {
-            "oldText": null,
-            "newText": "created\n",
-            "operation": "add",
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "created\r\n"
-      },
-      "expected": {
-        "action": "trash"
-      }
-    },
-    {
-      "name": "edited creation is a conflict",
-      "request": {
-        "diffs": [
-          {
-            "oldText": null,
-            "newText": "created",
-            "operation": "add",
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "created and edited"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "changed"
-      }
-    },
-    {
-      "name": "deletion restores a still missing path",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "deleted",
-            "newText": "",
-            "operation": "delete",
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": null
-      },
-      "expected": {
-        "action": "write",
-        "text": "deleted"
-      }
-    },
-    {
-      "name": "deletion never overwrites a recreated path",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "deleted",
-            "newText": "",
-            "operation": "delete",
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "recreated"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "changed"
-      }
-    },
-    {
-      "name": "tool-level delete kind marks an operation-less diff as deletion",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "original",
-            "newText": "",
-            "operation": null,
-            "toolKind": "delete",
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": null
-      },
-      "expected": {
-        "action": "write",
-        "text": "original"
-      }
-    },
-    {
-      "name": "explicit update operation wins over a delete tool kind",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "old",
-            "newText": "new",
-            "operation": "update",
-            "toolKind": "delete",
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "new"
-      },
-      "expected": {
-        "action": "write",
-        "text": "old"
-      }
-    },
-    {
-      "name": "editing a missing file is a conflict",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "old",
-            "newText": "new",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": null
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "changed"
-      }
-    },
-    {
-      "name": "created then deleted needs no change",
-      "request": {
-        "diffs": [
-          {
-            "oldText": null,
-            "newText": "tmp",
-            "operation": "add",
-            "toolKind": null,
-            "truncated": false
-          },
-          {
-            "oldText": "tmp",
-            "newText": "",
-            "operation": "delete",
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": null
-      },
-      "expected": {
-        "action": "none"
-      }
-    },
-    {
-      "name": "restoring identical text needs no write",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "same",
-            "newText": "same",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "same"
-      },
-      "expected": {
-        "action": "none"
-      }
-    },
-    {
-      "name": "pending tools are incomplete",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "old",
-            "newText": "new",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": true,
-        "missingEvidence": false,
-        "disk": "new"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "incomplete"
-      }
-    },
-    {
-      "name": "missing or moved evidence is incomplete",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "old",
-            "newText": "new",
-            "operation": null,
-            "toolKind": null,
-            "truncated": false
-          }
-        ],
-        "pending": false,
-        "missingEvidence": true,
-        "disk": "new"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "incomplete"
-      }
-    },
-    {
-      "name": "truncated evidence is incomplete",
-      "request": {
-        "diffs": [
-          {
-            "oldText": "old",
-            "newText": "new",
-            "operation": null,
-            "toolKind": null,
-            "truncated": true
-          }
-        ],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "new"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "incomplete"
-      }
-    },
-    {
-      "name": "no diffs is incomplete",
-      "request": {
-        "diffs": [],
-        "pending": false,
-        "missingEvidence": false,
-        "disk": "new"
-      },
-      "expected": {
-        "action": "conflict",
-        "reason": "incomplete"
-      }
-    }
-  ]
-}
diff --git a/rust/fixtures/agent/history-activity-v1.json b/rust/fixtures/agent/history-activity-v1.json
deleted file mode 100644
index 06222eec..00000000
--- a/rust/fixtures/agent/history-activity-v1.json
+++ /dev/null
@@ -1,164 +0,0 @@
-{
-  "initial": {
-    "upstream": {
-      "data": [
-        {
-          "id": "session-a",
-          "cwd": "/fixture/workspace",
-          "name": "Earlier conversation",
-          "preview": "First prompt",
-          "updatedAt": 1789893000,
-          "recencyAt": 1789893000,
-          "modelProvider": "native-provider"
-        },
-        {
-          "id": "session-b",
-          "cwd": "/fixture/workspace",
-          "name": "Later conversation",
-          "preview": "Second prompt",
-          "updatedAt": 1789896600,
-          "recencyAt": 1789896600,
-          "modelProvider": "previous-provider"
-        },
-        {
-          "id": "unknown-activity",
-          "cwd": "/fixture/workspace",
-          "name": "Unknown activity",
-          "updatedAt": 1789900200
-        }
-      ],
-      "nextCursor": null
-    },
-    "event": {
-      "kind": "sessions",
-      "token": "history-activity",
-      "sessions": [
-        {
-          "sessionId": "session-a",
-          "title": "Earlier conversation",
-          "updatedAt": "2026-09-20T08:30:00Z",
-          "modelProvider": "native-provider"
-        },
-        {
-          "sessionId": "session-b",
-          "title": "Later conversation",
-          "updatedAt": "2026-09-20T09:30:00Z",
-          "modelProvider": "previous-provider"
-        },
-        {
-          "sessionId": "unknown-activity",
-          "title": "Unknown activity",
-          "updatedAt": null
-        }
-      ]
-    }
-  },
-  "afterViewing": {
-    "upstream": {
-      "data": [
-        {
-          "id": "session-a",
-          "cwd": "/fixture/workspace",
-          "name": "Earlier conversation",
-          "preview": "First prompt",
-          "updatedAt": 1789903800,
-          "recencyAt": 1789893000,
-          "modelProvider": "native-provider"
-        },
-        {
-          "id": "session-b",
-          "cwd": "/fixture/workspace",
-          "name": "Later conversation",
-          "preview": "Second prompt",
-          "updatedAt": 1789896600,
-          "recencyAt": 1789896600,
-          "modelProvider": "previous-provider"
-        },
-        {
-          "id": "unknown-activity",
-          "cwd": "/fixture/workspace",
-          "name": "Unknown activity",
-          "updatedAt": 1789900200
-        }
-      ],
-      "nextCursor": null
-    },
-    "event": {
-      "kind": "sessions",
-      "token": "history-activity",
-      "sessions": [
-        {
-          "sessionId": "session-a",
-          "title": "Earlier conversation",
-          "updatedAt": "2026-09-20T08:30:00Z",
-          "modelProvider": "native-provider"
-        },
-        {
-          "sessionId": "session-b",
-          "title": "Later conversation",
-          "updatedAt": "2026-09-20T09:30:00Z",
-          "modelProvider": "previous-provider"
-        },
-        {
-          "sessionId": "unknown-activity",
-          "title": "Unknown activity",
-          "updatedAt": null
-        }
-      ]
-    }
-  },
-  "afterMessage": {
-    "upstream": {
-      "data": [
-        {
-          "id": "session-a",
-          "cwd": "/fixture/workspace",
-          "name": "Earlier conversation",
-          "preview": "First prompt",
-          "updatedAt": 1789907400,
-          "recencyAt": 1789907400,
-          "modelProvider": "native-provider"
-        },
-        {
-          "id": "session-b",
-          "cwd": "/fixture/workspace",
-          "name": "Later conversation",
-          "preview": "Second prompt",
-          "updatedAt": 1789896600,
-          "recencyAt": 1789896600,
-          "modelProvider": "previous-provider"
-        },
-        {
-          "id": "unknown-activity",
-          "cwd": "/fixture/workspace",
-          "name": "Unknown activity",
-          "updatedAt": 1789900200
-        }
-      ],
-      "nextCursor": null
-    },
-    "event": {
-      "kind": "sessions",
-      "token": "history-activity",
-      "sessions": [
-        {
-          "sessionId": "session-a",
-          "title": "Earlier conversation",
-          "updatedAt": "2026-09-20T12:30:00Z",
-          "modelProvider": "native-provider"
-        },
-        {
-          "sessionId": "session-b",
-          "title": "Later conversation",
-          "updatedAt": "2026-09-20T09:30:00Z",
-          "modelProvider": "previous-provider"
-        },
-        {
-          "sessionId": "unknown-activity",
-          "title": "Unknown activity",
-          "updatedAt": null
-        }
-      ]
-    }
-  }
-}
diff --git a/rust/fixtures/agent/hook-draft-validation-v1.json b/rust/fixtures/agent/hook-draft-validation-v1.json
deleted file mode 100644
index cb44a40f..00000000
--- a/rust/fixtures/agent/hook-draft-validation-v1.json
+++ /dev/null
@@ -1,806 +0,0 @@
-{
-  "command": "agent.hooks.validateDraft",
-  "description": "Field-level Hook draft validation shared by the macOS and Windows editors. The rules are the ones agent.hooks save enforces; platforms localize field/code pairs and enable saving only when valid.",
-  "cases": [
-    {
-      "name": "valid default draft",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": true,
-        "issues": [],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "valid tool draft with explicit timeout",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "before-tool",
-          "matcher": "edit",
-          "command": "printf done",
-          "timeoutText": "86400",
-          "agents": [
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": true,
-        "issues": [],
-        "timeoutSeconds": 86400
-      }
-    },
-    {
-      "name": "editing a Hook keeps its own name",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000001",
-          "name": "NOTIFY",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": true,
-        "issues": [],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "empty name",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "name",
-            "code": "required"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "name over 80 bytes",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "name",
-            "code": "too_long"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "name with path characters",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "../escape",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "name",
-            "code": "invalid_characters"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "name with spaces",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "spaces here",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "name",
-            "code": "invalid_characters"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "duplicate name ignores ASCII case",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "Notify",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "name",
-            "code": "duplicate"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "description over 200 Unicode scalars",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "description",
-            "code": "too_long"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "description of 200 Unicode scalars",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉汉",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": true,
-        "issues": [],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "matcher on a non-tool event",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "shell",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "matcher",
-            "code": "incompatible_event"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "whitespace-only command",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": " \n\t",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "command",
-            "code": "required"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "command over 32768 bytes",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": 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-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "command",
-            "code": "too_long"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "command containing NUL",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf\u0000done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "command",
-            "code": "contains_nul"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "zero timeout",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "0",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "timeout",
-            "code": "out_of_range"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "timeout above one day",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "86401",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "timeout",
-            "code": "out_of_range"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "overlong digit timeout",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "99999999999999999999999",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "timeout",
-            "code": "out_of_range"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "non-numeric timeout",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "abc",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "timeout",
-            "code": "not_integer"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "signed timeout",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "+5",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "timeout",
-            "code": "not_integer"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "no Agent selected",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": []
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "agents",
-            "code": "required"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "unknown Agent",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "gemini-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "agents",
-            "code": "unsupported"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "duplicate Agent",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "codex-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "agents",
-            "code": "duplicate"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "invalid identifier",
-      "request": {
-        "hook": {
-          "id": "not-a-uuid",
-          "name": "remind",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "printf done",
-          "timeoutText": "",
-          "agents": [
-            "codex-acp",
-            "claude-acp"
-          ]
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "id",
-            "code": "invalid"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    },
-    {
-      "name": "several fields report in editor order",
-      "request": {
-        "hook": {
-          "id": "00000000-0000-4000-8000-000000000002",
-          "name": "",
-          "description": "结束提醒",
-          "event": "turn-end",
-          "matcher": "all",
-          "command": "",
-          "timeoutText": "0",
-          "agents": []
-        },
-        "existingHooks": [
-          {
-            "id": "00000000-0000-4000-8000-000000000001",
-            "name": "notify"
-          }
-        ]
-      },
-      "expected": {
-        "valid": false,
-        "issues": [
-          {
-            "field": "name",
-            "code": "required"
-          },
-          {
-            "field": "command",
-            "code": "required"
-          },
-          {
-            "field": "timeout",
-            "code": "out_of_range"
-          },
-          {
-            "field": "agents",
-            "code": "required"
-          }
-        ],
-        "timeoutSeconds": null
-      }
-    }
-  ]
-}
diff --git a/rust/fixtures/agent/hooks-management-v1.json b/rust/fixtures/agent/hooks-management-v1.json
deleted file mode 100644
index 4c7afe01..00000000
--- a/rust/fixtures/agent/hooks-management-v1.json
+++ /dev/null
@@ -1,64 +0,0 @@
-{
-  "command": "agent.hooks",
-  "readRequest": {
-    "dataDirectory": "/fixture/library",
-    "action": "read"
-  },
-  "hook": {
-    "id": "00000000-0000-4000-8000-000000000001",
-    "name": "notify",
-    "description": "一轮结束时提醒",
-    "event": "turn-end",
-    "matcher": "all",
-    "command": "printf done",
-    "timeoutSeconds": null,
-    "agents": [
-      "codex-acp",
-      "claude-acp"
-    ],
-    "enabled": true,
-    "pendingRemoval": false
-  },
-  "library": {
-    "revision": "fixture-library-revision",
-    "hooks": [
-      {
-        "id": "00000000-0000-4000-8000-000000000001",
-        "name": "notify",
-        "description": "一轮结束时提醒",
-        "event": "turn-end",
-        "matcher": "all",
-        "command": "printf done",
-        "timeoutSeconds": null,
-        "agents": [
-          "codex-acp",
-          "claude-acp"
-        ],
-        "enabled": true,
-        "pendingRemoval": false,
-        "configuredAgents": [
-          "codex-acp"
-        ],
-        "needsSync": true
-      }
-    ],
-    "targets": [
-      {
-        "agentId": "codex-acp",
-        "file": {
-          "agentId": "codex-acp",
-          "path": "/fixture/.codex/hooks.json",
-          "revision": "codex-revision"
-        },
-        "issue": null,
-        "disabled": false
-      },
-      {
-        "agentId": "claude-acp",
-        "file": null,
-        "issue": "Hook configuration must be a regular file, not a symbolic link or directory.",
-        "disabled": false
-      }
-    ]
-  }
-}
diff --git a/rust/fixtures/agent/model-call-statistics-v1.json b/rust/fixtures/agent/model-call-statistics-v1.json
deleted file mode 100644
index 72b18b11..00000000
--- a/rust/fixtures/agent/model-call-statistics-v1.json
+++ /dev/null
@@ -1,409 +0,0 @@
-{
-  "version": 1,
-  "description": "Shared accounting of observed model calls. The Host attaches `statistics` to each `modelCall` event; desktop products merge contributions in event order: counters add, reasoningTokens adds over calls that report it, and a present context replaces the previous one.",
-  "cases": [
-    {
-      "name": "failedNonStreamingStepIsNotANonStreamingAnswer",
-      "description": "HTTP 500 counts as a failed step, never as a non-streaming answer; Windows previously counted it.",
-      "events": [
-        {
-          "sessionId": "session-1",
-          "call": {
-            "api": "responses",
-            "status": 500,
-            "streaming": false,
-            "durationMs": 40
-          },
-          "statistics": {
-            "requests": 1,
-            "steps": 1,
-            "failedSteps": 1,
-            "nonStreamingSteps": 0,
-            "durationMs": 40,
-            "inputTokens": 0,
-            "cacheReadTokens": 0,
-            "cacheWriteTokens": 0,
-            "outputTokens": 0,
-            "callsWithUsage": 0,
-            "firstTokenMs": 0,
-            "firstTokenCount": 0,
-            "generationMs": 0,
-            "generatedTokens": 0
-          }
-        },
-        {
-          "sessionId": "session-1",
-          "call": {
-            "api": "responses",
-            "status": 200,
-            "streaming": false,
-            "durationMs": 3000,
-            "usage": {
-              "inputTokens": 500,
-              "cacheReadTokens": 0,
-              "cacheWriteTokens": 0,
-              "outputTokens": 300,
-              "reasoningTokens": 100
-            }
-          },
-          "statistics": {
-            "requests": 1,
-            "steps": 1,
-            "failedSteps": 0,
-            "nonStreamingSteps": 1,
-            "durationMs": 3000,
-            "inputTokens": 500,
-            "cacheReadTokens": 0,
-            "cacheWriteTokens": 0,
-            "outputTokens": 300,
-            "reasoningTokens": 100,
-            "callsWithUsage": 1,
-            "firstTokenMs": 0,
-            "firstTokenCount": 0,
-            "generationMs": 0,
-            "generatedTokens": 0
-          }
-        }
-      ],
-      "total": {
-        "requests": 2,
-        "steps": 2,
-        "failedSteps": 1,
-        "nonStreamingSteps": 1,
-        "durationMs": 3040,
-        "inputTokens": 500,
-        "cacheReadTokens": 0,
-        "cacheWriteTokens": 0,
-        "outputTokens": 300,
-        "reasoningTokens": 100,
-        "callsWithUsage": 1,
-        "firstTokenMs": 0,
-        "firstTokenCount": 0,
-        "generationMs": 0,
-        "generatedTokens": 0
-      }
-    },
-    {
-      "name": "auxiliaryAndToollessRequestsKeepTheMainContext",
-      "description": "An auxiliary title request and an unrecognized tool-less background request spend tokens but never replace the current context; Windows previously showed the last request's composition.",
-      "events": [
-        {
-          "sessionId": "session-1",
-          "call": {
-            "api": "anthropicMessages",
-            "status": 200,
-            "streaming": true,
-            "firstTokenMs": 100,
-            "durationMs": 1000,
-            "usage": {
-              "inputTokens": 100,
-              "cacheReadTokens": 900,
-              "cacheWriteTokens": 0,
-              "outputTokens": 50
-            },
-            "context": {
-              "systemPromptTokens": 10,
-              "toolTokens": 20,
-              "mcpToolTokens": 0,
-              "messageTokens": 70,
-              "toolCount": 12,
-              "mcpToolCount": 0,
-              "scaledToUsage": true
-            }
-          },
-          "statistics": {
-            "requests": 1,
-            "steps": 1,
-            "failedSteps": 0,
-            "nonStreamingSteps": 0,
-            "durationMs": 1000,
-            "inputTokens": 100,
-            "cacheReadTokens": 900,
-            "cacheWriteTokens": 0,
-            "outputTokens": 50,
-            "callsWithUsage": 1,
-            "firstTokenMs": 100,
-            "firstTokenCount": 1,
-            "generationMs": 900,
-            "generatedTokens": 50,
-            "context": {
-              "systemPromptTokens": 10,
-              "toolTokens": 20,
-              "mcpToolTokens": 0,
-              "messageTokens": 70,
-              "toolCount": 12,
-              "mcpToolCount": 0,
-              "scaledToUsage": true
-            }
-          }
-        },
-        {
-          "sessionId": "session-1",
-          "call": {
-            "api": "anthropicMessages",
-            "status": 200,
-            "streaming": true,
-            "firstTokenMs": 1900,
-            "durationMs": 2000,
-            "usage": {
-              "inputTokens": 30,
-              "cacheReadTokens": 0,
-              "cacheWriteTokens": 0,
-              "outputTokens": 20
-            },
-            "context": {
-              "systemPromptTokens": 5,
-              "toolTokens": 0,
-              "mcpToolTokens": 0,
-              "messageTokens": 300,
-              "toolCount": 0,
-              "mcpToolCount": 0,
-              "scaledToUsage": true
-            },
-            "auxiliary": true
-          },
-          "statistics": {
-            "requests": 1,
-            "steps": 0,
-            "failedSteps": 0,
-            "nonStreamingSteps": 0,
-            "durationMs": 0,
-            "inputTokens": 30,
-            "cacheReadTokens": 0,
-            "cacheWriteTokens": 0,
-            "outputTokens": 20,
-            "callsWithUsage": 1,
-            "firstTokenMs": 0,
-            "firstTokenCount": 0,
-            "generationMs": 0,
-            "generatedTokens": 0
-          }
-        },
-        {
-          "sessionId": "session-1",
-          "call": {
-            "api": "anthropicMessages",
-            "status": 200,
-            "streaming": false,
-            "durationMs": 200,
-            "context": {
-              "systemPromptTokens": 1,
-              "toolTokens": 0,
-              "mcpToolTokens": 0,
-              "messageTokens": 40,
-              "toolCount": 0,
-              "mcpToolCount": 0,
-              "scaledToUsage": false
-            }
-          },
-          "statistics": {
-            "requests": 1,
-            "steps": 1,
-            "failedSteps": 0,
-            "nonStreamingSteps": 1,
-            "durationMs": 200,
-            "inputTokens": 0,
-            "cacheReadTokens": 0,
-            "cacheWriteTokens": 0,
-            "outputTokens": 0,
-            "callsWithUsage": 0,
-            "firstTokenMs": 0,
-            "firstTokenCount": 0,
-            "generationMs": 0,
-            "generatedTokens": 0
-          }
-        }
-      ],
-      "total": {
-        "requests": 3,
-        "steps": 2,
-        "failedSteps": 0,
-        "nonStreamingSteps": 1,
-        "durationMs": 1200,
-        "inputTokens": 130,
-        "cacheReadTokens": 900,
-        "cacheWriteTokens": 0,
-        "outputTokens": 70,
-        "callsWithUsage": 2,
-        "firstTokenMs": 100,
-        "firstTokenCount": 1,
-        "generationMs": 900,
-        "generatedTokens": 50,
-        "context": {
-          "systemPromptTokens": 10,
-          "toolTokens": 20,
-          "mcpToolTokens": 0,
-          "messageTokens": 70,
-          "toolCount": 12,
-          "mcpToolCount": 0,
-          "scaledToUsage": true
-        }
-      }
-    },
-    {
-      "name": "toollessAgentRefreshesContextFromEveryStep",
-      "description": "An Agent that never sends tools keeps its composition current instead of freezing the first one.",
-      "events": [
-        {
-          "sessionId": "session-1",
-          "call": {
-            "api": "chatCompletions",
-            "status": 200,
-            "streaming": true,
-            "durationMs": 500,
-            "context": {
-              "systemPromptTokens": 0,
-              "toolTokens": 0,
-              "mcpToolTokens": 0,
-              "messageTokens": 1000,
-              "toolCount": 0,
-              "mcpToolCount": 0,
-              "scaledToUsage": false
-            }
-          },
-          "statistics": {
-            "requests": 1,
-            "steps": 1,
-            "failedSteps": 0,
-            "nonStreamingSteps": 0,
-            "durationMs": 500,
-            "inputTokens": 0,
-            "cacheReadTokens": 0,
-            "cacheWriteTokens": 0,
-            "outputTokens": 0,
-            "callsWithUsage": 0,
-            "firstTokenMs": 0,
-            "firstTokenCount": 0,
-            "generationMs": 0,
-            "generatedTokens": 0,
-            "context": {
-              "systemPromptTokens": 0,
-              "toolTokens": 0,
-              "mcpToolTokens": 0,
-              "messageTokens": 1000,
-              "toolCount": 0,
-              "mcpToolCount": 0,
-              "scaledToUsage": false
-            }
-          }
-        },
-        {
-          "sessionId": "session-1",
-          "call": {
-            "api": "chatCompletions",
-            "status": 200,
-            "streaming": false,
-            "durationMs": 300,
-            "context": {
-              "systemPromptTokens": 0,
-              "toolTokens": 0,
-              "mcpToolTokens": 0,
-              "messageTokens": 5000,
-              "toolCount": 0,
-              "mcpToolCount": 0,
-              "scaledToUsage": false
-            }
-          },
-          "statistics": {
-            "requests": 1,
-            "steps": 1,
-            "failedSteps": 0,
-            "nonStreamingSteps": 1,
-            "durationMs": 300,
-            "inputTokens": 0,
-            "cacheReadTokens": 0,
-            "cacheWriteTokens": 0,
-            "outputTokens": 0,
-            "callsWithUsage": 0,
-            "firstTokenMs": 0,
-            "firstTokenCount": 0,
-            "generationMs": 0,
-            "generatedTokens": 0,
-            "context": {
-              "systemPromptTokens": 0,
-              "toolTokens": 0,
-              "mcpToolTokens": 0,
-              "messageTokens": 5000,
-              "toolCount": 0,
-              "mcpToolCount": 0,
-              "scaledToUsage": false
-            }
-          }
-        }
-      ],
-      "total": {
-        "requests": 2,
-        "steps": 2,
-        "failedSteps": 0,
-        "nonStreamingSteps": 1,
-        "durationMs": 800,
-        "inputTokens": 0,
-        "cacheReadTokens": 0,
-        "cacheWriteTokens": 0,
-        "outputTokens": 0,
-        "callsWithUsage": 0,
-        "firstTokenMs": 0,
-        "firstTokenCount": 0,
-        "generationMs": 0,
-        "generatedTokens": 0,
-        "context": {
-          "systemPromptTokens": 0,
-          "toolTokens": 0,
-          "mcpToolTokens": 0,
-          "messageTokens": 5000,
-          "toolCount": 0,
-          "mcpToolCount": 0,
-          "scaledToUsage": false
-        }
-      }
-    },
-    {
-      "name": "streamWithoutUsageMeasuresLatencyOnly",
-      "description": "A stream without provider counters reports first-token latency but no generation speed, and leaves the token sums a lower bound.",
-      "events": [
-        {
-          "sessionId": "session-1",
-          "call": {
-            "api": "responses",
-            "status": 200,
-            "streaming": true,
-            "firstTokenMs": 300,
-            "durationMs": 900
-          },
-          "statistics": {
-            "requests": 1,
-            "steps": 1,
-            "failedSteps": 0,
-            "nonStreamingSteps": 0,
-            "durationMs": 900,
-            "inputTokens": 0,
-            "cacheReadTokens": 0,
-            "cacheWriteTokens": 0,
-            "outputTokens": 0,
-            "callsWithUsage": 0,
-            "firstTokenMs": 300,
-            "firstTokenCount": 1,
-            "generationMs": 0,
-            "generatedTokens": 0
-          }
-        }
-      ],
-      "total": {
-        "requests": 1,
-        "steps": 1,
-        "failedSteps": 0,
-        "nonStreamingSteps": 0,
-        "durationMs": 900,
-        "inputTokens": 0,
-        "cacheReadTokens": 0,
-        "cacheWriteTokens": 0,
-        "outputTokens": 0,
-        "callsWithUsage": 0,
-        "firstTokenMs": 300,
-        "firstTokenCount": 1,
-        "generationMs": 0,
-        "generatedTokens": 0
-      }
-    }
-  ]
-}
diff --git a/rust/fixtures/agent/next-turn-configuration-v1.json b/rust/fixtures/agent/next-turn-configuration-v1.json
deleted file mode 100644
index c6aceebf..00000000
--- a/rust/fixtures/agent/next-turn-configuration-v1.json
+++ /dev/null
@@ -1,1118 +0,0 @@
-{
-  "version": 1,
-  "description": "Next-turn session settings. The product sends `applyNextTurnConfiguration` with its latest catalog and the user's choices after a turn ends; the Host applies one request at a time and answers with one `nextTurnConfigured` event. `answers` script the Agent's catalog after each request.",
-  "command": {
-    "kind": "applyNextTurnConfiguration",
-    "token": "config-2",
-    "sessionId": "session-1",
-    "catalog": [
-      {
-        "id": "model",
-        "category": "model",
-        "currentValue": "model-a",
-        "choices": [
-          "model-a",
-          "model-b"
-        ]
-      }
-    ],
-    "choices": [
-      {
-        "configId": "model",
-        "value": "model-b"
-      }
-    ]
-  },
-  "events": {
-    "configured": {
-      "kind": "nextTurnConfigured",
-      "token": "config-2",
-      "sessionId": "session-1",
-      "configOptions": [
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-b",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        }
-      ]
-    },
-    "failed": {
-      "kind": "nextTurnConfigured",
-      "token": "config-2",
-      "sessionId": "session-1",
-      "configOptions": [
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-b",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        }
-      ],
-      "failure": "requestFailed",
-      "message": "Rejected"
-    },
-    "unsupportedBeforeAnyRequest": {
-      "kind": "nextTurnConfigured",
-      "token": "config-2",
-      "sessionId": "session-1",
-      "failure": "unsupported"
-    }
-  },
-  "cases": [
-    {
-      "name": "modelFirstThenCatalogOrder",
-      "description": "Model choices apply first; the rest follow the Agent's catalog order, not the order the user chose them (Windows previously used choice order).",
-      "catalog": [
-        {
-          "id": "mode",
-          "name": "mode",
-          "type": "select",
-          "currentValue": "read-only",
-          "options": [
-            {
-              "value": "read-only",
-              "name": "read-only"
-            },
-            {
-              "value": "auto",
-              "name": "auto"
-            },
-            {
-              "value": "plan",
-              "name": "plan"
-            }
-          ],
-          "category": "mode"
-        },
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-a",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        },
-        {
-          "id": "reasoning_effort",
-          "name": "reasoning_effort",
-          "type": "select",
-          "currentValue": "medium",
-          "options": [
-            {
-              "value": "medium",
-              "name": "medium"
-            },
-            {
-              "value": "high",
-              "name": "high"
-            }
-          ],
-          "category": "thought_level"
-        }
-      ],
-      "choices": [
-        {
-          "configId": "reasoning_effort",
-          "value": "high"
-        },
-        {
-          "configId": "mode",
-          "value": "auto"
-        },
-        {
-          "configId": "model",
-          "value": "model-b"
-        }
-      ],
-      "answers": [
-        {
-          "configOptions": [
-            {
-              "id": "mode",
-              "name": "mode",
-              "type": "select",
-              "currentValue": "read-only",
-              "options": [
-                {
-                  "value": "read-only",
-                  "name": "read-only"
-                },
-                {
-                  "value": "auto",
-                  "name": "auto"
-                },
-                {
-                  "value": "plan",
-                  "name": "plan"
-                }
-              ],
-              "category": "mode"
-            },
-            {
-              "id": "model",
-              "name": "model",
-              "type": "select",
-              "currentValue": "model-b",
-              "options": [
-                {
-                  "value": "model-a",
-                  "name": "model-a"
-                },
-                {
-                  "value": "model-b",
-                  "name": "model-b"
-                }
-              ],
-              "category": "model"
-            },
-            {
-              "id": "reasoning_effort",
-              "name": "reasoning_effort",
-              "type": "select",
-              "currentValue": "medium",
-              "options": [
-                {
-                  "value": "medium",
-                  "name": "medium"
-                },
-                {
-                  "value": "high",
-                  "name": "high"
-                }
-              ],
-              "category": "thought_level"
-            }
-          ]
-        },
-        {
-          "configOptions": [
-            {
-              "id": "mode",
-              "name": "mode",
-              "type": "select",
-              "currentValue": "auto",
-              "options": [
-                {
-                  "value": "read-only",
-                  "name": "read-only"
-                },
-                {
-                  "value": "auto",
-                  "name": "auto"
-                },
-                {
-                  "value": "plan",
-                  "name": "plan"
-                }
-              ],
-              "category": "mode"
-            },
-            {
-              "id": "model",
-              "name": "model",
-              "type": "select",
-              "currentValue": "model-b",
-              "options": [
-                {
-                  "value": "model-a",
-                  "name": "model-a"
-                },
-                {
-                  "value": "model-b",
-                  "name": "model-b"
-                }
-              ],
-              "category": "model"
-            },
-            {
-              "id": "reasoning_effort",
-              "name": "reasoning_effort",
-              "type": "select",
-              "currentValue": "medium",
-              "options": [
-                {
-                  "value": "medium",
-                  "name": "medium"
-                },
-                {
-                  "value": "high",
-                  "name": "high"
-                }
-              ],
-              "category": "thought_level"
-            }
-          ]
-        },
-        {
-          "configOptions": [
-            {
-              "id": "mode",
-              "name": "mode",
-              "type": "select",
-              "currentValue": "auto",
-              "options": [
-                {
-                  "value": "read-only",
-                  "name": "read-only"
-                },
-                {
-                  "value": "auto",
-                  "name": "auto"
-                },
-                {
-                  "value": "plan",
-                  "name": "plan"
-                }
-              ],
-              "category": "mode"
-            },
-            {
-              "id": "model",
-              "name": "model",
-              "type": "select",
-              "currentValue": "model-b",
-              "options": [
-                {
-                  "value": "model-a",
-                  "name": "model-a"
-                },
-                {
-                  "value": "model-b",
-                  "name": "model-b"
-                }
-              ],
-              "category": "model"
-            },
-            {
-              "id": "reasoning_effort",
-              "name": "reasoning_effort",
-              "type": "select",
-              "currentValue": "high",
-              "options": [
-                {
-                  "value": "medium",
-                  "name": "medium"
-                },
-                {
-                  "value": "high",
-                  "name": "high"
-                }
-              ],
-              "category": "thought_level"
-            }
-          ]
-        }
-      ],
-      "expected": {
-        "requests": [
-          {
-            "configId": "model",
-            "value": "model-b"
-          },
-          {
-            "configId": "mode",
-            "value": "auto"
-          },
-          {
-            "configId": "reasoning_effort",
-            "value": "high"
-          }
-        ],
-        "failure": null
-      }
-    },
-    {
-      "name": "modelChangeRemovesAChosenValue",
-      "description": "Remaining choices are revalidated against the catalog the model change returned.",
-      "catalog": [
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-a",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        },
-        {
-          "id": "reasoning_effort",
-          "name": "reasoning_effort",
-          "type": "select",
-          "currentValue": "medium",
-          "options": [
-            {
-              "value": "medium",
-              "name": "medium"
-            },
-            {
-              "value": "high",
-              "name": "high"
-            }
-          ],
-          "category": "thought_level"
-        }
-      ],
-      "choices": [
-        {
-          "configId": "model",
-          "value": "model-b"
-        },
-        {
-          "configId": "reasoning_effort",
-          "value": "high"
-        }
-      ],
-      "answers": [
-        {
-          "configOptions": [
-            {
-              "id": "model",
-              "name": "model",
-              "type": "select",
-              "currentValue": "model-b",
-              "options": [
-                {
-                  "value": "model-a",
-                  "name": "model-a"
-                },
-                {
-                  "value": "model-b",
-                  "name": "model-b"
-                }
-              ],
-              "category": "model"
-            },
-            {
-              "id": "reasoning_effort",
-              "name": "reasoning_effort",
-              "type": "select",
-              "currentValue": "medium",
-              "options": [
-                {
-                  "value": "medium",
-                  "name": "medium"
-                }
-              ],
-              "category": "thought_level"
-            }
-          ]
-        }
-      ],
-      "expected": {
-        "requests": [
-          {
-            "configId": "model",
-            "value": "model-b"
-          }
-        ],
-        "failure": "unsupported"
-      }
-    },
-    {
-      "name": "modelChangeAlreadyAppliesAChoice",
-      "description": "A choice the new catalog already reports as current is not sent again.",
-      "catalog": [
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-a",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        },
-        {
-          "id": "reasoning_effort",
-          "name": "reasoning_effort",
-          "type": "select",
-          "currentValue": "medium",
-          "options": [
-            {
-              "value": "medium",
-              "name": "medium"
-            },
-            {
-              "value": "high",
-              "name": "high"
-            }
-          ],
-          "category": "thought_level"
-        }
-      ],
-      "choices": [
-        {
-          "configId": "model",
-          "value": "model-b"
-        },
-        {
-          "configId": "reasoning_effort",
-          "value": "high"
-        }
-      ],
-      "answers": [
-        {
-          "configOptions": [
-            {
-              "id": "model",
-              "name": "model",
-              "type": "select",
-              "currentValue": "model-b",
-              "options": [
-                {
-                  "value": "model-a",
-                  "name": "model-a"
-                },
-                {
-                  "value": "model-b",
-                  "name": "model-b"
-                }
-              ],
-              "category": "model"
-            },
-            {
-              "id": "reasoning_effort",
-              "name": "reasoning_effort",
-              "type": "select",
-              "currentValue": "high",
-              "options": [
-                {
-                  "value": "medium",
-                  "name": "medium"
-                },
-                {
-                  "value": "high",
-                  "name": "high"
-                }
-              ],
-              "category": "thought_level"
-            }
-          ]
-        }
-      ],
-      "expected": {
-        "requests": [
-          {
-            "configId": "model",
-            "value": "model-b"
-          }
-        ],
-        "failure": null
-      }
-    },
-    {
-      "name": "agentDoesNotConfirmTheChoice",
-      "description": "An answer that reports another current value stops the sequence (Windows previously accepted any answer).",
-      "catalog": [
-        {
-          "id": "mode",
-          "name": "mode",
-          "type": "select",
-          "currentValue": "read-only",
-          "options": [
-            {
-              "value": "read-only",
-              "name": "read-only"
-            },
-            {
-              "value": "auto",
-              "name": "auto"
-            },
-            {
-              "value": "plan",
-              "name": "plan"
-            }
-          ],
-          "category": "mode"
-        },
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-a",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        },
-        {
-          "id": "reasoning_effort",
-          "name": "reasoning_effort",
-          "type": "select",
-          "currentValue": "medium",
-          "options": [
-            {
-              "value": "medium",
-              "name": "medium"
-            },
-            {
-              "value": "high",
-              "name": "high"
-            }
-          ],
-          "category": "thought_level"
-        }
-      ],
-      "choices": [
-        {
-          "configId": "model",
-          "value": "model-b"
-        },
-        {
-          "configId": "mode",
-          "value": "auto"
-        }
-      ],
-      "answers": [
-        {
-          "configOptions": [
-            {
-              "id": "mode",
-              "name": "mode",
-              "type": "select",
-              "currentValue": "read-only",
-              "options": [
-                {
-                  "value": "read-only",
-                  "name": "read-only"
-                },
-                {
-                  "value": "auto",
-                  "name": "auto"
-                },
-                {
-                  "value": "plan",
-                  "name": "plan"
-                }
-              ],
-              "category": "mode"
-            },
-            {
-              "id": "model",
-              "name": "model",
-              "type": "select",
-              "currentValue": "model-a",
-              "options": [
-                {
-                  "value": "model-a",
-                  "name": "model-a"
-                },
-                {
-                  "value": "model-b",
-                  "name": "model-b"
-                }
-              ],
-              "category": "model"
-            },
-            {
-              "id": "reasoning_effort",
-              "name": "reasoning_effort",
-              "type": "select",
-              "currentValue": "medium",
-              "options": [
-                {
-                  "value": "medium",
-                  "name": "medium"
-                },
-                {
-                  "value": "high",
-                  "name": "high"
-                }
-              ],
-              "category": "thought_level"
-            }
-          ]
-        }
-      ],
-      "expected": {
-        "requests": [
-          {
-            "configId": "model",
-            "value": "model-b"
-          }
-        ],
-        "failure": "notConfirmed"
-      }
-    },
-    {
-      "name": "optionMissingFromTheCatalog",
-      "description": "Choices for options the Agent still offers apply first; a choice whose option disappeared then fails the sequence.",
-      "catalog": [
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-a",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        }
-      ],
-      "choices": [
-        {
-          "configId": "verbosity",
-          "value": "high"
-        },
-        {
-          "configId": "model",
-          "value": "model-b"
-        }
-      ],
-      "answers": [
-        {
-          "configOptions": [
-            {
-              "id": "model",
-              "name": "model",
-              "type": "select",
-              "currentValue": "model-b",
-              "options": [
-                {
-                  "value": "model-a",
-                  "name": "model-a"
-                },
-                {
-                  "value": "model-b",
-                  "name": "model-b"
-                }
-              ],
-              "category": "model"
-            }
-          ]
-        }
-      ],
-      "expected": {
-        "requests": [
-          {
-            "configId": "model",
-            "value": "model-b"
-          }
-        ],
-        "failure": "unsupported"
-      }
-    },
-    {
-      "name": "requestFailsMidway",
-      "description": "A failed request keeps the settings the Agent already confirmed and abandons the rest.",
-      "catalog": [
-        {
-          "id": "mode",
-          "name": "mode",
-          "type": "select",
-          "currentValue": "read-only",
-          "options": [
-            {
-              "value": "read-only",
-              "name": "read-only"
-            },
-            {
-              "value": "auto",
-              "name": "auto"
-            },
-            {
-              "value": "plan",
-              "name": "plan"
-            }
-          ],
-          "category": "mode"
-        },
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-a",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        },
-        {
-          "id": "reasoning_effort",
-          "name": "reasoning_effort",
-          "type": "select",
-          "currentValue": "medium",
-          "options": [
-            {
-              "value": "medium",
-              "name": "medium"
-            },
-            {
-              "value": "high",
-              "name": "high"
-            }
-          ],
-          "category": "thought_level"
-        }
-      ],
-      "choices": [
-        {
-          "configId": "model",
-          "value": "model-b"
-        },
-        {
-          "configId": "mode",
-          "value": "auto"
-        }
-      ],
-      "answers": [
-        {
-          "configOptions": [
-            {
-              "id": "mode",
-              "name": "mode",
-              "type": "select",
-              "currentValue": "read-only",
-              "options": [
-                {
-                  "value": "read-only",
-                  "name": "read-only"
-                },
-                {
-                  "value": "auto",
-                  "name": "auto"
-                },
-                {
-                  "value": "plan",
-                  "name": "plan"
-                }
-              ],
-              "category": "mode"
-            },
-            {
-              "id": "model",
-              "name": "model",
-              "type": "select",
-              "currentValue": "model-b",
-              "options": [
-                {
-                  "value": "model-a",
-                  "name": "model-a"
-                },
-                {
-                  "value": "model-b",
-                  "name": "model-b"
-                }
-              ],
-              "category": "model"
-            },
-            {
-              "id": "reasoning_effort",
-              "name": "reasoning_effort",
-              "type": "select",
-              "currentValue": "medium",
-              "options": [
-                {
-                  "value": "medium",
-                  "name": "medium"
-                },
-                {
-                  "value": "high",
-                  "name": "high"
-                }
-              ],
-              "category": "thought_level"
-            }
-          ]
-        },
-        {
-          "error": "Rejected"
-        }
-      ],
-      "expected": {
-        "requests": [
-          {
-            "configId": "model",
-            "value": "model-b"
-          },
-          {
-            "configId": "mode",
-            "value": "auto"
-          }
-        ],
-        "failure": "requestFailed"
-      }
-    },
-    {
-      "name": "laterChoiceReplacesEarlierChoice",
-      "description": "Only the latest choice for one option is applied.",
-      "catalog": [
-        {
-          "id": "mode",
-          "name": "mode",
-          "type": "select",
-          "currentValue": "read-only",
-          "options": [
-            {
-              "value": "read-only",
-              "name": "read-only"
-            },
-            {
-              "value": "auto",
-              "name": "auto"
-            },
-            {
-              "value": "plan",
-              "name": "plan"
-            }
-          ],
-          "category": "mode"
-        },
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-a",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        },
-        {
-          "id": "reasoning_effort",
-          "name": "reasoning_effort",
-          "type": "select",
-          "currentValue": "medium",
-          "options": [
-            {
-              "value": "medium",
-              "name": "medium"
-            },
-            {
-              "value": "high",
-              "name": "high"
-            }
-          ],
-          "category": "thought_level"
-        }
-      ],
-      "choices": [
-        {
-          "configId": "mode",
-          "value": "auto"
-        },
-        {
-          "configId": "mode",
-          "value": "plan"
-        }
-      ],
-      "answers": [
-        {
-          "configOptions": [
-            {
-              "id": "mode",
-              "name": "mode",
-              "type": "select",
-              "currentValue": "plan",
-              "options": [
-                {
-                  "value": "read-only",
-                  "name": "read-only"
-                },
-                {
-                  "value": "auto",
-                  "name": "auto"
-                },
-                {
-                  "value": "plan",
-                  "name": "plan"
-                }
-              ],
-              "category": "mode"
-            },
-            {
-              "id": "model",
-              "name": "model",
-              "type": "select",
-              "currentValue": "model-a",
-              "options": [
-                {
-                  "value": "model-a",
-                  "name": "model-a"
-                },
-                {
-                  "value": "model-b",
-                  "name": "model-b"
-                }
-              ],
-              "category": "model"
-            },
-            {
-              "id": "reasoning_effort",
-              "name": "reasoning_effort",
-              "type": "select",
-              "currentValue": "medium",
-              "options": [
-                {
-                  "value": "medium",
-                  "name": "medium"
-                },
-                {
-                  "value": "high",
-                  "name": "high"
-                }
-              ],
-              "category": "thought_level"
-            }
-          ]
-        }
-      ],
-      "expected": {
-        "requests": [
-          {
-            "configId": "mode",
-            "value": "plan"
-          }
-        ],
-        "failure": null
-      }
-    },
-    {
-      "name": "choiceEqualToCurrentValueSendsNothing",
-      "description": "Returning to the confirmed value needs no request.",
-      "catalog": [
-        {
-          "id": "mode",
-          "name": "mode",
-          "type": "select",
-          "currentValue": "read-only",
-          "options": [
-            {
-              "value": "read-only",
-              "name": "read-only"
-            },
-            {
-              "value": "auto",
-              "name": "auto"
-            },
-            {
-              "value": "plan",
-              "name": "plan"
-            }
-          ],
-          "category": "mode"
-        },
-        {
-          "id": "model",
-          "name": "model",
-          "type": "select",
-          "currentValue": "model-a",
-          "options": [
-            {
-              "value": "model-a",
-              "name": "model-a"
-            },
-            {
-              "value": "model-b",
-              "name": "model-b"
-            }
-          ],
-          "category": "model"
-        },
-        {
-          "id": "reasoning_effort",
-          "name": "reasoning_effort",
-          "type": "select",
-          "currentValue": "medium",
-          "options": [
-            {
-              "value": "medium",
-              "name": "medium"
-            },
-            {
-              "value": "high",
-              "name": "high"
-            }
-          ],
-          "category": "thought_level"
-        }
-      ],
-      "choices": [
-        {
-          "configId": "mode",
-          "value": "read-only"
-        }
-      ],
-      "answers": [],
-      "expected": {
-        "requests": [],
-        "failure": null
-      }
-    }
-  ]
-}
diff --git a/rust/fixtures/agent/shared-instructions-v1.json b/rust/fixtures/agent/shared-instructions-v1.json
deleted file mode 100644
index 607a4128..00000000
--- a/rust/fixtures/agent/shared-instructions-v1.json
+++ /dev/null
@@ -1,43 +0,0 @@
-{
-  "version": 1,
-  "readRequest": {
-    "command": "agent.instructions.shared",
-    "payload": {
-      "dataDirectory": "/fixture/app-support/AgentInstructions",
-      "action": "read"
-    }
-  },
-  "library": {
-    "file": {
-      "agentId": "shared",
-      "path": "/fixture/app-support/AgentInstructions/Shared.md",
-      "content": "Use concise Chinese replies.",
-      "exists": true,
-      "revision": "source-sha256"
-    },
-    "agents": [
-      {
-        "agentId": "codex-acp",
-        "file": {
-          "agentId": "codex-acp",
-          "path": "/fixture/user/.codex/AGENTS.md",
-          "content": "Own rules\n<!-- LITHE:SHARED-INSTRUCTIONS:BEGIN -->\nUse concise Chinese replies.\n<!-- LITHE:SHARED-INSTRUCTIONS:END -->\n",
-          "exists": true,
-          "revision": "native-sha256"
-        },
-        "enabled": true,
-        "needsSync": false,
-        "ownLineCount": 1,
-        "issue": null
-      },
-      {
-        "agentId": "claude-acp",
-        "file": null,
-        "enabled": null,
-        "needsSync": false,
-        "ownLineCount": 0,
-        "issue": "The instruction path must be a regular file, not a symbolic link or directory."
-      }
-    ]
-  }
-}
diff --git a/rust/fixtures/agent/skills-management-v1.json b/rust/fixtures/agent/skills-management-v1.json
deleted file mode 100644
index 9e39f281..00000000
--- a/rust/fixtures/agent/skills-management-v1.json
+++ /dev/null
@@ -1,144 +0,0 @@
-{
-  "requests": {
-    "list": {
-      "command": "agent.skills",
-      "payload": {
-        "action": "list",
-        "agentId": "codex-acp",
-        "workspace": "/fixture/workspace"
-      }
-    },
-    "directories": {
-      "command": "agent.skills",
-      "payload": {
-        "action": "directories",
-        "agentId": "claude-acp",
-        "workspace": "/fixture/workspace"
-      }
-    },
-    "create": {
-      "command": "agent.skills",
-      "payload": {
-        "action": "create",
-        "agentId": "codex-acp",
-        "workspace": "/fixture/workspace",
-        "scope": "repo",
-        "name": "example-skill",
-        "description": "Use for a specific workflow",
-        "instructions": "Inspect the project and explain the result."
-      }
-    },
-    "import": {
-      "command": "agent.skills",
-      "payload": {
-        "action": "import",
-        "agentId": "claude-acp",
-        "workspace": "/fixture/workspace",
-        "scope": "user",
-        "source": "/fixture/import/example-skill"
-      }
-    },
-    "read": {
-      "command": "agent.skills",
-      "payload": {
-        "action": "read",
-        "agentId": "codex-acp",
-        "source": "/fixture/home/.agents/skills/shared-checks/SKILL.md"
-      }
-    },
-    "setEnabled": {
-      "command": "agent.skills",
-      "payload": {
-        "action": "setEnabled",
-        "agentId": "codex-acp",
-        "workspace": "/fixture/workspace",
-        "source": "/fixture/workspace/.agents/skills/project-workflow/SKILL.md",
-        "enabled": false,
-        "scope": "repo"
-      }
-    }
-  },
-  "nativeCodex": {
-    "data": [
-      {
-        "cwd": "/fixture/workspace",
-        "skills": [
-          {
-            "name": "plugin-helper",
-            "description": "Use the plugin helper",
-            "path": "/fixture/plugins/helper/SKILL.md",
-            "scope": "user",
-            "enabled": true,
-            "pluginId": "helper@example"
-          },
-          {
-            "name": "project-workflow",
-            "description": "Use for this project",
-            "path": "/fixture/workspace/.agents/skills/project-workflow/SKILL.md",
-            "scope": "repo",
-            "enabled": false,
-            "pluginId": null
-          },
-          {
-            "name": "shared-checks",
-            "description": "Use for common checks",
-            "path": "/fixture/home/.agents/skills/shared-checks/SKILL.md",
-            "scope": "user",
-            "enabled": true,
-            "pluginId": null
-          }
-        ],
-        "errors": []
-      }
-    ]
-  },
-  "normalizedCodex": {
-    "skills": [
-      {
-        "name": "plugin-helper",
-        "description": "Use the plugin helper",
-        "path": "/fixture/plugins/helper/SKILL.md",
-        "scope": "user",
-        "enabled": true,
-        "pluginId": "helper@example"
-      },
-      {
-        "name": "project-workflow",
-        "description": "Use for this project",
-        "path": "/fixture/workspace/.agents/skills/project-workflow/SKILL.md",
-        "scope": "repo",
-        "enabled": false,
-        "pluginId": null
-      },
-      {
-        "name": "shared-checks",
-        "description": "Use for common checks",
-        "path": "/fixture/home/.agents/skills/shared-checks/SKILL.md",
-        "scope": "user",
-        "enabled": true,
-        "pluginId": null
-      }
-    ],
-    "source": "agent",
-    "issues": [],
-    "directories": {}
-  },
-  "claudeInventory": {
-    "skills": [
-      {
-        "name": "local-review",
-        "description": "Review this project's changes",
-        "path": "/fixture/workspace/.claude/skills/local-review/SKILL.md",
-        "scope": "repo",
-        "enabled": false,
-        "pluginId": null
-      }
-    ],
-    "source": "directory",
-    "issues": [],
-    "directories": {
-      "user": "/fixture/home/.claude/skills",
-      "repo": "/fixture/workspace/.claude/skills"
-    }
-  }
-}
diff --git a/rust/lithe-agent-host/Cargo.toml b/rust/lithe-agent-host/Cargo.toml
deleted file mode 100644
index bfef3593..00000000
--- a/rust/lithe-agent-host/Cargo.toml
+++ /dev/null
@@ -1,41 +0,0 @@
-[package]
-name = "lithe-agent-host"
-version = "0.1.0"
-edition = "2021"
-license = "Apache-2.0"
-description = "Shared ACP session and agent process host for Lithe"
-
-[dependencies]
-agent-client-protocol = { version = "=2.2.0", features = ["unstable_end_turn_token_usage", "unstable_session_notices"] }
-bytes = "1"
-futures = "0.3"
-fs2 = "0.4"
-flate2 = { version = "1", default-features = false, features = ["rust_backend"] }
-http-body-util = "0.1"
-hyper = { version = "1", features = ["http1", "server"] }
-hyper-util = { version = "0.1", features = ["tokio"] }
-kill_tree = { version = "0.2", features = ["tokio"] }
-serde = { version = "1", features = ["derive"] }
-reqwest = { version = "0.12", default-features = false, features = ["rustls-tls", "stream"] }
-rmcp = { version = "=3.5.0", default-features = false, features = ["client", "transport-async-rw", "transport-streamable-http-client"] }
-http = "1"
-sse-stream = "=0.2.6"
-serde_json = "1"
-sha2 = "0.10"
-serde_yaml_ng = "0.10.0"
-semver = "1"
-tokio = { version = "1", features = ["io-util", "net", "process", "rt", "sync", "time"] }
-tokio-util = { version = "0.7", features = ["compat"] }
-tungstenite = { version = "0.28", default-features = false }
-url = "2"
-uuid = { version = "1", features = ["v4"] }
-
-[target.'cfg(unix)'.dependencies]
-libc = "0.2"
-
-[target.'cfg(windows)'.dependencies]
-windows-sys = { version = "0.61", features = ["Win32_Storage_FileSystem"] }
-
-[dev-dependencies]
-tokio = { version = "1", features = ["macros", "test-util"] }
-tungstenite = { version = "0.28", default-features = false, features = ["handshake"] }
diff --git a/rust/lithe-agent-host/src/attachment_retention.rs b/rust/lithe-agent-host/src/attachment_retention.rs
deleted file mode 100644
index b99b209f..00000000
--- a/rust/lithe-agent-host/src/attachment_retention.rs
+++ /dev/null
@@ -1,123 +0,0 @@
-//! Retention plan for pasted Agent images.
-//!
-//! A pasted image is a file the Agent reads later as a resource link, so it must
-//! outlive the paste for as long as any conversation still refers to it. Platforms
-//! list their pasted-image cache and keep a ledger of the references a conversation
-//! accepted; this module decides which files may be deleted. Deleting stays with
-//! the platform. Contract: `rust/fixtures/agent/attachment-retention-v1.json`.
-
-use std::collections::HashSet;
-
-use serde::{Deserialize, Serialize};
-
-/// Age after which an unreferenced image is no longer needed (seven days).
-pub const RETENTION_MILLISECONDS: i64 = 7 * 24 * 3600 * 1000;
-
-/// One file in the platform's pasted-image cache.
-#[derive(Clone, Debug, Deserialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct Entry {
-    pub path: String,
-    /// Last modification time in Unix milliseconds; unknown ages are never expired.
-    #[serde(default)]
-    pub modified_ms: Option<i64>,
-    /// True for a paste that was abandoned or failed before any conversation accepted it.
-    #[serde(default)]
-    pub abandoned: bool,
-}
-
-/// Payload of `agent.attachments.retentionPlan`. Pure: no files are read or written.
-#[derive(Clone, Debug, Deserialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct Request {
-    pub now_ms: i64,
-    pub entries: Vec<Entry>,
-    /// Paths a conversation has accepted, from the platform's ledger.
-    #[serde(default)]
-    pub accepted_references: Vec<String>,
-    /// Whether the platform's ledger file exists. Only its existence matters, never
-    /// its contents: a missing ledger means the cache predates the ledger, so every
-    /// image already cached is seeded as accepted instead of being expired.
-    pub ledger_present: bool,
-    /// Compare paths without case (Windows); separators are always normalized.
-    #[serde(default)]
-    pub case_insensitive: bool,
-}
-
-/// Why a file is deleted or kept; stable snake_case codes for logs and tests.
-#[derive(Clone, Copy, Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "snake_case")]
-pub enum Reason {
-    Referenced,
-    Abandoned,
-    Expired,
-    Recent,
-}
-
-/// One decision for one cache entry.
-#[derive(Clone, Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct Decision {
-    pub path: String,
-    pub reason: Reason,
-}
-
-/// Files the platform should delete and files it must keep.
-#[derive(Clone, Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct Plan {
-    pub delete: Vec<Decision>,
-    pub keep: Vec<Decision>,
-    /// Paths the platform must write to a new ledger before deleting anything;
-    /// empty whenever the ledger already exists.
-    pub seed: Vec<String>,
-}
-
-fn key(path: &str, case_insensitive: bool) -> String {
-    let normalized = path.replace('\\', "/");
-    if case_insensitive {
-        normalized.to_lowercase()
-    } else {
-        normalized
-    }
-}
-
-/// A referenced image is always kept, even when the paste was marked abandoned.
-pub fn plan(request: &Request) -> Plan {
-    let seeded = request
-        .entries
-        .iter()
-        .filter(|entry| !request.ledger_present && !entry.abandoned);
-    let referenced: HashSet<String> = request
-        .accepted_references
-        .iter()
-        .chain(seeded.clone().map(|entry| &entry.path))
-        .map(|path| key(path, request.case_insensitive))
-        .collect();
-    let cutoff = request.now_ms.saturating_sub(RETENTION_MILLISECONDS);
-    let mut result = Plan {
-        delete: Vec::new(),
-        keep: Vec::new(),
-        seed: seeded.map(|entry| entry.path.clone()).collect(),
-    };
-    for entry in &request.entries {
-        let reason = if referenced.contains(&key(&entry.path, request.case_insensitive)) {
-            Reason::Referenced
-        } else if entry.abandoned {
-            Reason::Abandoned
-        } else if entry.modified_ms.is_some_and(|modified| modified < cutoff) {
-            Reason::Expired
-        } else {
-            Reason::Recent
-        };
-        let decision = Decision {
-            path: entry.path.clone(),
-            reason,
-        };
-        match reason {
-            Reason::Referenced | Reason::Recent => result.keep.push(decision),
-            Reason::Abandoned | Reason::Expired => result.delete.push(decision),
-        }
-    }
-    result
-}
diff --git a/rust/lithe-agent-host/src/catalog.rs b/rust/lithe-agent-host/src/catalog.rs
deleted file mode 100644
index ccc07c7b..00000000
--- a/rust/lithe-agent-host/src/catalog.rs
+++ /dev/null
@@ -1,139 +0,0 @@
-//! Agents Lithe can install and launch, and how each receives its settings.
-//!
-//! API keys travel over ACP stdio. Codex uses `gateway` authentication; Claude
-//! uses its public session options to avoid gateway placeholder credentials.
-//!
-//! Entries mirror the official ACP registry
-//! (`cdn.agentclientprotocol.com/registry/v1/latest/registry.json`): the same
-//! agent ids, npm packages, and pinned versions. A version is raised only after
-//! the adapter is re-verified, because each adapter speaks its own dialect of
-//! authentication and cancellation.
-
-use serde::{Deserialize, Serialize};
-
-/// Wire protocol of an AI provider, using the platform settings' names.
-#[derive(Clone, Copy, Debug, Deserialize, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub enum ProviderProtocol {
-    Responses,
-    ChatCompletions,
-    AnthropicMessages,
-}
-
-/// How the provider's default model reaches new sessions. Restored models
-/// remain owned by the adapter's session history.
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub enum ModelDelivery {
-    /// `CODEX_CONFIG={"model": ...}`, merged into Codex's session config.
-    CodexConfig,
-    /// `_meta.claudeCode.options.model` on `session/new`, never a process pin.
-    ClaudeSessionOptions,
-}
-
-/// The agent's own command-line tool, which the user installs and updates.
-///
-/// Adapters that can drive an existing CLI normally omit their bundled copy, so
-/// Lithe does not download an agent the user already has.
-#[derive(Debug, PartialEq, Eq)]
-pub struct AgentCli {
-    /// Executable searched on the login shell's `PATH`.
-    pub command: &'static str,
-    pub name: &'static str,
-    /// Lowest version the pinned adapter supports, from its dependency range.
-    pub minimum_version: &'static str,
-    /// Environment variable that tells the adapter which executable to run.
-    pub path_env: &'static str,
-    /// Whether this environment variable accepts an npm `.cmd` shim on Windows.
-    ///
-    /// Codex's relay launches the shim through a shell. Claude's adapter passes
-    /// the path directly to `child_process.spawn`, which cannot execute batch
-    /// files, so Windows keeps the SDK's native launcher for that adapter.
-    pub accepts_windows_shim: bool,
-    /// How users usually install or update the CLI, shown when it is missing.
-    pub install_hint: &'static str,
-    /// npm package that provides the CLI, for one-click install or update
-    /// with the user's npm.
-    pub package: &'static str,
-    /// Known Homebrew package names, including supported release channels.
-    pub brew_packages: &'static [&'static str],
-}
-
-/// One installable ACP adapter distributed as an npm package.
-#[derive(Debug, PartialEq, Eq)]
-pub struct CatalogAgent {
-    /// ACP registry id, also the install directory name.
-    pub id: &'static str,
-    pub name: &'static str,
-    pub description: &'static str,
-    pub package: &'static str,
-    /// Pinned, verified package version.
-    pub version: &'static str,
-    /// Executable the package installs under `node_modules/.bin`.
-    pub bin: &'static str,
-    /// Lowest Node.js major version the adapter and its dependencies run on.
-    pub minimum_node_major: u32,
-    pub protocol: ProviderProtocol,
-    pub model_delivery: ModelDelivery,
-    /// The user's CLI the adapter drives, if it does not bundle one we use.
-    pub cli: Option<AgentCli>,
-    /// Whether sign-in and a conversation were verified against a real
-    /// provider with this version.
-    pub verified: bool,
-}
-
-pub const CATALOG: &[CatalogAgent] = &[
-    CatalogAgent {
-        id: "codex-acp",
-        name: "Codex",
-        description: "OpenAI Codex through its ACP adapter",
-        package: "@agentclientprotocol/codex-acp",
-        version: "2.2.2",
-        bin: "codex-acp",
-        // `open@11`, a dependency of the adapter, requires Node.js 20.
-        minimum_node_major: 20,
-        protocol: ProviderProtocol::Responses,
-        model_delivery: ModelDelivery::CodexConfig,
-        // `@openai/codex ^0.160.1` in the adapter; its platform binaries are
-        // optional dependencies that the install skips.
-        cli: Some(AgentCli {
-            command: "codex",
-            name: "Codex CLI",
-            minimum_version: "0.160.1",
-            path_env: "CODEX_PATH",
-            accepts_windows_shim: true,
-            install_hint: "npm install -g @openai/codex",
-            package: "@openai/codex",
-            brew_packages: &["codex"],
-        }),
-        verified: true,
-    },
-    CatalogAgent {
-        id: "claude-acp",
-        name: "Claude",
-        description: "Claude Agent through its ACP adapter",
-        package: "@agentclientprotocol/claude-agent-acp",
-        version: "0.95.0",
-        bin: "claude-agent-acp",
-        minimum_node_major: 22,
-        protocol: ProviderProtocol::AnthropicMessages,
-        model_delivery: ModelDelivery::ClaudeSessionOptions,
-        // The Claude Agent SDK pairs with Claude Code 2.1.309. Its native
-        // binary is an optional dependency; Windows keeps it because npm's
-        // `claude` shim is a `.cmd` file that the adapter cannot spawn.
-        cli: Some(AgentCli {
-            command: "claude",
-            name: "Claude Code",
-            minimum_version: "2.1.309",
-            path_env: "CLAUDE_CODE_EXECUTABLE",
-            accepts_windows_shim: false,
-            install_hint: "npm install -g @anthropic-ai/claude-code",
-            package: "@anthropic-ai/claude-code",
-            brew_packages: &["claude-code", "claude-code@latest"],
-        }),
-        verified: false,
-    },
-];
-
-pub fn find(id: &str) -> Option<&'static CatalogAgent> {
-    CATALOG.iter().find(|agent| agent.id == id)
-}
diff --git a/rust/lithe-agent-host/src/claude_desktop.rs b/rust/lithe-agent-host/src/claude_desktop.rs
deleted file mode 100644
index 9f6f441d..00000000
--- a/rust/lithe-agent-host/src/claude_desktop.rs
+++ /dev/null
@@ -1,994 +0,0 @@
-//! Readable replay of sessions started in Claude Desktop.
-//!
-//! Claude Desktop runs Claude Code with its own MCP servers (`ccd_turn`,
-//! `ccd_session`, `ccd_pr`, `ccd_view`, `visualize`, `terminal`, …). The model
-//! there reports progress, ends turns, proposes follow-up tasks and binds pull
-//! requests through those tools, and Desktop draws each as part of its UI.
-//! Resumed in Lithe, they would be anonymous `mcp__…` rows in the collapsed
-//! process area and the transcript would look empty or cryptic.
-//!
-//! This presenter turns them into what Desktop shows, in two ways:
-//!
-//! - Standard ACP where it has a shape: `wrap_up` becomes the turn's agent
-//!   message, `update_plan` a `plan` update, files a pane showed become tool
-//!   locations.
-//! - A card for mechanisms ACP has no shape for, as `_meta.lithe.claudeDesktop`
-//!   on the tool call (see `rust/contracts/application-boundary.md`). Every
-//!   such call keeps a readable English title and kind, so a client that does
-//!   not draw the card still shows a sensible tool row.
-//!
-//! It applies to the adapter's replay and to the earlier history read from disk
-//! alike. Lithe never offers these tools, so live turns are unaffected.
-
-use std::collections::{HashMap, HashSet};
-
-use serde_json::{json, Value};
-
-/// Tool Claude Desktop's model uses to end a turn with a recap and a question.
-const WRAP_UP_TOOL: &str = "mcp__ccd_turn__wrap_up";
-/// Tool Claude Desktop's model uses to set or advance its step checklist.
-const UPDATE_PLAN_TOOL: &str = "mcp__ccd_turn__update_plan";
-/// Widget source above this many characters is not carried in the card.
-const WIDGET_CODE_LIMIT: usize = 256 * 1024;
-/// Limit for prompts, summaries and other free text carried in a card.
-const CARD_TEXT_LIMIT: usize = 16 * 1024;
-
-/// One checklist step; `status` is an ACP plan status
-/// (`pending`, `in_progress` or `completed`).
-#[derive(Clone)]
-struct Step {
-    content: String,
-    status: &'static str,
-}
-
-#[derive(Default)]
-pub(crate) struct Presenter {
-    /// Tool call ids already shown another way; their follow-up
-    /// `tool_call_update`s (status, the tool's acknowledgement) are dropped.
-    absorbed: HashSet<String>,
-    /// Latest checklist per session. `update_plan` may only advance or tick
-    /// steps of the list set earlier, so each call is applied to this state.
-    plans: HashMap<String, Vec<Step>>,
-    /// Readable title and kind per retitled call, kept so a later update that
-    /// restates the adapter's own title does not undo them.
-    titles: HashMap<String, (String, &'static str)>,
-    /// Task cards by tool call id, kept so a later call can change their state.
-    tasks: HashMap<String, Value>,
-    /// Desktop task id (`task_…`) → tool call id of the card that proposed it.
-    task_ids: HashMap<String, String>,
-    /// Calls that change a task card once their result arrives, by tool call id.
-    task_changes: HashMap<String, TaskChange>,
-}
-
-/// A `dismiss_task` or `start_session` call held back until its result says
-/// whether the card it targets really changed.
-struct TaskChange {
-    task: String,
-    /// State a successful result means.
-    state: &'static str,
-    /// The call as a readable tool row, shown only if the call fails.
-    call: Value,
-}
-
-impl Presenter {
-    /// `update` as the client should see it: usually one update, none when it
-    /// is absorbed, two when a turn's recap also offers suggested replies.
-    pub(crate) fn present(&mut self, session_id: &str, update: Value) -> Vec<Value> {
-        if update["sessionUpdate"] == "agent_message_chunk" {
-            return vec![present_pr_created(update)];
-        }
-        let Some(id) = update["toolCallId"].as_str().map(str::to_owned) else {
-            return vec![update];
-        };
-        match update["sessionUpdate"].as_str() {
-            Some("tool_call") => self.tool_call(session_id, id, update),
-            Some("tool_call_update") => self.tool_call_update(id, update),
-            _ => vec![update],
-        }
-    }
-
-    fn tool_call(&mut self, session_id: &str, id: String, update: Value) -> Vec<Value> {
-        let Some(name) = update["name"].as_str().map(str::to_owned) else {
-            return vec![update];
-        };
-        let input = update["rawInput"].clone();
-        match name.as_str() {
-            WRAP_UP_TOOL => {
-                let Some(text) = wrap_up_text(&input) else {
-                    return vec![update];
-                };
-                self.absorbed.insert(id.clone());
-                let mut shown = vec![json!({
-                    "sessionUpdate": "agent_message_chunk",
-                    "content": {"type": "text", "text": text},
-                })];
-                // The suggested replies are buttons in Desktop's next-step box.
-                if let Some(actions) = next_step_actions(&input) {
-                    let mut replies = json!({
-                        "sessionUpdate": "tool_call",
-                        "toolCallId": format!("{id}#next"),
-                        "title": "Suggested replies",
-                        "kind": "other",
-                        "status": "completed",
-                    });
-                    set_card(
-                        &mut replies,
-                        json!({"card": "nextStep", "actions": actions}),
-                    );
-                    shown.push(replies);
-                }
-                shown
-            }
-            UPDATE_PLAN_TOOL => {
-                let steps = self.plans.entry(session_id.to_owned()).or_default();
-                if apply_plan(steps, &input) {
-                    self.absorbed.insert(id);
-                    return vec![plan_update(steps)];
-                }
-                self.retitle(id, update, "Updated the task list", "think")
-            }
-            "mcp__ccd_session__dismiss_task" => {
-                // Shown as the state of the card it withdraws, once the result confirms it.
-                if let Some(task) = str_field(&input, "task_id") {
-                    let call = readable_call(update, "Withdrew a suggested task");
-                    self.task_changes.insert(
-                        id.clone(),
-                        TaskChange {
-                            task: task.to_owned(),
-                            state: "withdrawn",
-                            call,
-                        },
-                    );
-                }
-                self.absorbed.insert(id);
-                Vec::new()
-            }
-            "mcp__ccd_session__start_session" if str_field(&input, "proposal_id").is_some() => {
-                // Starting a proposed card: the card itself changes state.
-                let task = str_field(&input, "proposal_id")
-                    .unwrap_or_default()
-                    .to_owned();
-                let call = readable_call(update, "Started a suggested task");
-                self.task_changes.insert(
-                    id.clone(),
-                    TaskChange {
-                        task,
-                        state: "started",
-                        call,
-                    },
-                );
-                self.absorbed.insert(id);
-                Vec::new()
-            }
-            _ => {
-                let Some(described) = describe(&name, &input) else {
-                    return vec![update];
-                };
-                let mut update = update;
-                if !described.locations.is_empty() {
-                    update["locations"] = Value::Array(described.locations);
-                }
-                if let Some(card) = described.card {
-                    if card["card"] == "task" {
-                        self.tasks.insert(id.clone(), card.clone());
-                    }
-                    set_card(&mut update, card);
-                }
-                self.retitle(id, update, &described.title, described.kind)
-            }
-        }
-    }
-
-    fn tool_call_update(&mut self, id: String, mut update: Value) -> Vec<Value> {
-        if self.task_changes.contains_key(&id) {
-            return self.finish_task_change(&id, update);
-        }
-        if self.absorbed.contains(&id) {
-            return Vec::new();
-        }
-        if self.tasks.contains_key(&id) {
-            if let Some(task) = task_id_in(&result_text(&update)) {
-                self.task_ids.insert(task, id.clone());
-            }
-        }
-        if let Some((title, kind)) = self.titles.get(&id) {
-            if update.get("title").is_some() {
-                update["title"] = json!(title);
-                update["kind"] = json!(kind);
-            }
-        }
-        vec![update]
-    }
-
-    /// A held-back task call got an update: wait out progress, apply a success
-    /// to its card, and keep a failure visible, since nothing changed.
-    fn finish_task_change(&mut self, id: &str, update: Value) -> Vec<Value> {
-        let status = update["status"].as_str();
-        if !matches!(status, Some("completed" | "failed")) {
-            return Vec::new();
-        }
-        let Some(change) = self.task_changes.remove(id) else {
-            return vec![update];
-        };
-        self.absorbed.remove(id);
-        if status == Some("failed") {
-            return vec![change.call, update];
-        }
-        // dismiss_task reports a task the user already started instead of withdrawing it.
-        let text = result_text(&update);
-        let state = if text.contains("already started") || text.contains("no longer pending") {
-            "started"
-        } else {
-            change.state
-        };
-        self.change_task(&change.task, state)
-    }
-
-    fn retitle(
-        &mut self,
-        id: String,
-        mut update: Value,
-        title: &str,
-        kind: &'static str,
-    ) -> Vec<Value> {
-        update["title"] = json!(title);
-        update["kind"] = json!(kind);
-        self.titles.insert(id, (title.to_owned(), kind));
-        vec![update]
-    }
-
-    /// The card that proposed `task`, now in `state`.
-    fn change_task(&mut self, task: &str, state: &'static str) -> Vec<Value> {
-        let Some(call) = self.task_ids.get(task).cloned() else {
-            return Vec::new();
-        };
-        let Some(card) = self.tasks.get_mut(&call) else {
-            return Vec::new();
-        };
-        card["state"] = json!(state);
-        let mut update = json!({"sessionUpdate": "tool_call_update", "toolCallId": call});
-        set_card(&mut update, card.clone());
-        vec![update]
-    }
-}
-
-/// `call` as an ordinary tool row with a readable title.
-fn readable_call(mut call: Value, title: &str) -> Value {
-    call["title"] = json!(title);
-    call["kind"] = json!("other");
-    call
-}
-
-/// Whether a tool's input feeds a card, plan or reply, so a replay must carry
-/// it whole instead of cut for a tool-detail preview.
-pub(crate) fn carries_card_input(name: &str) -> bool {
-    name.strip_prefix("mcp__")
-        .and_then(|rest| rest.split_once("__"))
-        .is_some_and(|(server, _)| {
-            matches!(
-                server,
-                "ccd_turn"
-                    | "ccd_session"
-                    | "ccd_pr"
-                    | "ccd_directory"
-                    | "ccd_view"
-                    | "ccd_host"
-                    | "visualize"
-            )
-        })
-}
-
-/// Largest string of such an input a replay carries; the widget source limit
-/// is the largest of the card fields.
-pub(crate) const CARD_INPUT_LIMIT: usize = WIDGET_CODE_LIMIT;
-
-/// Readable presentation of one Desktop tool call.
-struct Described {
-    title: String,
-    kind: &'static str,
-    locations: Vec<Value>,
-    card: Option<Value>,
-}
-
-impl Described {
-    fn row(title: impl Into<String>, kind: &'static str) -> Self {
-        Self {
-            title: title.into(),
-            kind,
-            locations: Vec::new(),
-            card: None,
-        }
-    }
-
-    fn card(title: impl Into<String>, card: Value) -> Self {
-        Self {
-            card: Some(card),
-            ..Self::row(title, "other")
-        }
-    }
-}
-
-/// Title, kind and card for a Desktop tool, or None for any other tool.
-fn describe(name: &str, input: &Value) -> Option<Described> {
-    let (server, tool) = name.strip_prefix("mcp__")?.split_once("__")?;
-    let field = |key: &str| str_field(input, key);
-    let described = match (server, tool) {
-        ("ccd_session", "mark_chapter") => {
-            let title = field("title")?;
-            Described::card(
-                format!("Chapter: {title}"),
-                json!({"card": "chapter", "title": title, "summary": field("summary")}),
-            )
-        }
-        ("ccd_session", "spawn_task") => {
-            task_card(field("title")?, field("tldr"), field("prompt"), "proposed")
-        }
-        ("ccd_session", "start_session") => task_card(
-            field("title")?,
-            None,
-            field("prompt"),
-            // The model may only propose; a start the user asked for runs at once.
-            if field("initiation") == Some("own_initiative") {
-                "proposed"
-            } else {
-                "started"
-            },
-        ),
-        ("ccd_session", "hand_off_to_session") => {
-            let plan = field("remaining_plan");
-            let summary =
-                plan.and_then(|plan| plan.lines().map(str::trim).find(|line| !line.is_empty()));
-            task_card(field("title")?, summary, plan, "handedOff")
-        }
-        ("ccd_session", "read_widget_context") => {
-            Described::row("Read the widget's context", "read")
-        }
-        ("ccd_pr", "get_status") => Described::row("Checked the pull request status", "read"),
-        ("ccd_pr", action @ ("bind_pr" | "unbind_pr" | "set_monitor" | "set_auto_merge")) => {
-            let url = field("url");
-            let action = match action {
-                "bind_pr" => "bound",
-                "unbind_pr" => "unbound",
-                "set_monitor" => "monitored",
-                _ => "autoMerge",
-            };
-            let mut card = json!({"card": "pullRequest", "action": action, "url": url});
-            if let Some(number) = url.and_then(pr_number) {
-                card["number"] = json!(number);
-            }
-            match action {
-                "monitored" => card["autoFix"] = json!(input["auto_fix"] == true),
-                "autoMerge" => card["enabled"] = json!(input["enabled"] != false),
-                _ => {}
-            }
-            let title = url.map_or("Pull request".to_owned(), |url| {
-                format!("Pull request {url}")
-            });
-            Described::card(title, card)
-        }
-        ("ccd_directory", action @ ("change_directory" | "request_directory")) => {
-            let path = field("path")?;
-            let action = if action == "change_directory" {
-                "changed"
-            } else {
-                "requested"
-            };
-            Described::card(
-                format!("Working folder {path}"),
-                json!({"card": "directory", "action": action, "path": path}),
-            )
-        }
-        ("ccd_view", "show_pane") => match field("path") {
-            Some(path) => Described {
-                locations: vec![json!({"path": path})],
-                ..Described::row(format!("Showed {path}"), "read")
-            },
-            None => Described::row(
-                format!("Showed the {} pane", field("pane").unwrap_or("side")),
-                "other",
-            ),
-        },
-        ("ccd_host", tool @ ("open_in_editor" | "reveal_path")) => {
-            let path = field("path")?;
-            let verb = if tool == "open_in_editor" {
-                "Opened"
-            } else {
-                "Revealed"
-            };
-            let mut location = json!({"path": path});
-            if let Some(line) = input["line"].as_u64().filter(|line| *line > 0) {
-                location["line"] = json!(line);
-            }
-            Described {
-                locations: vec![location],
-                ..Described::row(format!("{verb} {path}"), "read")
-            }
-        }
-        ("visualize", "show_widget") => {
-            let title = humanize(field("title").unwrap_or("visualization"));
-            let code =
-                field("widget_code").filter(|code| code.chars().count() <= WIDGET_CODE_LIMIT);
-            Described::card(
-                format!("Visualization: {title}"),
-                json!({"card": "widget", "title": title, "code": code}),
-            )
-        }
-        ("visualize", "read_me") => Described::row("Read the visualization guide", "read"),
-        ("terminal", "run_in_terminal") => Described::row(
-            field("command").map_or("Ran a command in a terminal tab".to_owned(), first_line),
-            "execute",
-        ),
-        ("terminal", "read_terminal") => Described::row("Read a terminal tab", "read"),
-        ("Claude_Browser", "navigate") => Described::row(
-            field("url").map_or("Opened a page".to_owned(), |url| format!("Opened {url}")),
-            "fetch",
-        ),
-        (server, tool) => {
-            let area = match server {
-                "ccd_turn" | "ccd_session" | "ccd_session_mgmt" | "ccd_sidebar" | "ccd_window"
-                | "ccd_view" | "ccd_settings" | "ccd_host" | "ccd_pr" | "ccd_directory"
-                | "ccd_connectors" => "Claude Desktop",
-                "Claude_Browser" => "Browser",
-                "computer-use" => "Computer use",
-                "terminal" => "Terminal",
-                "scheduled-tasks" => "Scheduled tasks",
-                "visualize" => "Visualization",
-                // Desktop names a claude.ai connector by its id, which says nothing to the user.
-                _ if is_connector_id(server) => "Connector",
-                _ => return None,
-            };
-            let kind = match tool.split('_').next() {
-                Some("list" | "get" | "read" | "search" | "find") => "read",
-                _ => "other",
-            };
-            Described::row(format!("{area}: {}", humanize(tool)), kind)
-        }
-    };
-    Some(described)
-}
-
-/// A UUID in its 8-4-4-4-12 form.
-fn is_connector_id(server: &str) -> bool {
-    let groups: Vec<_> = server.split('-').collect();
-    groups.len() == 5
-        && groups
-            .iter()
-            .zip([8, 4, 4, 4, 12])
-            .all(|(group, len)| group.len() == len && group.chars().all(|c| c.is_ascii_hexdigit()))
-}
-
-fn task_card(title: &str, summary: Option<&str>, prompt: Option<&str>, state: &str) -> Described {
-    Described::card(
-        format!("Suggested task: {title}"),
-        json!({
-            "card": "task",
-            "title": title,
-            "summary": summary.map(|text| truncate(text, CARD_TEXT_LIMIT)),
-            "prompt": prompt.map(|text| truncate(text, CARD_TEXT_LIMIT)),
-            "state": state,
-        }),
-    )
-}
-
-fn set_card(update: &mut Value, card: Value) {
-    if !update["_meta"].is_object() {
-        update["_meta"] = json!({});
-    }
-    if !update["_meta"]["lithe"].is_object() {
-        update["_meta"]["lithe"] = json!({});
-    }
-    update["_meta"]["lithe"]["claudeDesktop"] = card;
-}
-
-fn str_field<'a>(input: &'a Value, key: &str) -> Option<&'a str> {
-    input[key]
-        .as_str()
-        .map(str::trim)
-        .filter(|value| !value.is_empty())
-}
-
-/// The recap followed by the question, as separate paragraphs.
-fn wrap_up_text(input: &Value) -> Option<String> {
-    let text = ["recap", "ask"]
-        .iter()
-        .filter_map(|key| str_field(input, key))
-        .collect::<Vec<_>>()
-        .join("\n\n");
-    (!text.is_empty()).then_some(text)
-}
-
-/// Suggested replies that send a message. A label-only action only closes
-/// Desktop's box, so it has nothing to offer here.
-fn next_step_actions(input: &Value) -> Option<Vec<Value>> {
-    let actions: Vec<Value> = input["actions"]
-        .as_array()?
-        .iter()
-        .filter_map(|action| {
-            let label = str_field(action, "label")?;
-            let message = str_field(action, "message")?;
-            Some(json!({"label": label, "message": truncate(message, CARD_TEXT_LIMIT)}))
-        })
-        .take(4)
-        .collect();
-    (!actions.is_empty()).then_some(actions)
-}
-
-/// Desktop asks the model to wrap a created PR's URL in `<pr-created>` so it
-/// can draw a status card; elsewhere the tag is noise around a link.
-fn present_pr_created(mut update: Value) -> Value {
-    const OPEN: &str = "<pr-created>";
-    const CLOSE: &str = "</pr-created>";
-    let Some(text) = update["content"]["text"]
-        .as_str()
-        .filter(|text| text.contains(OPEN))
-    else {
-        return update;
-    };
-    let mut out = String::with_capacity(text.len());
-    let mut rest = text;
-    while let Some(start) = rest.find(OPEN) {
-        let after = &rest[start + OPEN.len()..];
-        let Some(end) = after.find(CLOSE) else { break };
-        let url = after[..end].trim();
-        out.push_str(&rest[..start]);
-        if url.starts_with("https://") && !url.contains(char::is_whitespace) {
-            match pr_number(url) {
-                Some(number) => out.push_str(&format!("[Pull request #{number}]({url})")),
-                None => out.push_str(&format!("[{url}]({url})")),
-            }
-        } else {
-            out.push_str(&rest[start..start + OPEN.len() + end + CLOSE.len()]);
-        }
-        rest = &after[end + CLOSE.len()..];
-    }
-    out.push_str(rest);
-    update["content"]["text"] = json!(out);
-    update
-}
-
-/// Number of a GitHub-style `…/pull/<n>` URL.
-fn pr_number(url: &str) -> Option<u64> {
-    let (_, tail) = url.rsplit_once("/pull/")?;
-    tail.split(['/', '#', '?']).next()?.parse().ok()
-}
-
-/// Text of a tool result update's content blocks.
-fn result_text(update: &Value) -> String {
-    update["content"]
-        .as_array()
-        .into_iter()
-        .flatten()
-        .filter_map(|item| item["content"]["text"].as_str())
-        .collect::<Vec<_>>()
-        .join("\n")
-}
-
-/// First `task_<id>` Desktop names in a tool result, past its `task_id:` label.
-fn task_id_in(text: &str) -> Option<String> {
-    text.match_indices("task_")
-        .map(|(start, _)| {
-            text[start..]
-                .chars()
-                .take_while(|c| c.is_ascii_alphanumeric() || *c == '_')
-                .collect::<String>()
-        })
-        .find(|id| id != "task_id" && id.len() > "task_".len())
-}
-
-/// `list_sessions` → `list sessions`.
-fn humanize(name: &str) -> String {
-    name.replace(['_', '-'], " ")
-}
-
-fn first_line(text: &str) -> String {
-    truncate(text.lines().next().unwrap_or(text), 200)
-}
-
-fn truncate(text: &str, limit: usize) -> String {
-    match text.char_indices().nth(limit) {
-        Some((index, _)) => format!("{}…", &text[..index]),
-        None => text.to_owned(),
-    }
-}
-
-/// Applies one `update_plan` input and reports whether it changed anything.
-/// Inputs either replace the list (`items`), tick steps by one-based index
-/// (`done`) and start one (`start`), or `advance`: finish the running step
-/// and start the next pending one.
-fn apply_plan(steps: &mut Vec<Step>, input: &Value) -> bool {
-    if let Some(items) = input["items"].as_array() {
-        *steps = items
-            .iter()
-            .filter_map(|item| {
-                Some(Step {
-                    content: item["content"].as_str()?.to_owned(),
-                    status: status(item["status"].as_str()),
-                })
-            })
-            .collect();
-        return !steps.is_empty();
-    }
-    if steps.is_empty() {
-        return false;
-    }
-    let mut changed = false;
-    let mut set = |index: usize, value: &'static str| {
-        if let Some(step) = index.checked_sub(1).and_then(|i| steps.get_mut(i)) {
-            step.status = value;
-            changed = true;
-        }
-    };
-    for index in input["done"].as_array().into_iter().flatten() {
-        set(index.as_u64().unwrap_or(0) as usize, "completed");
-    }
-    if let Some(index) = input["start"].as_u64() {
-        set(index as usize, "in_progress");
-    }
-    if input["advance"] == true {
-        let running = steps.iter().position(|s| s.status == "in_progress");
-        if let Some(index) = running {
-            steps[index].status = "completed";
-        }
-        let from = running.map_or(0, |index| index + 1);
-        if let Some(next) = steps[from..].iter_mut().find(|s| s.status == "pending") {
-            next.status = "in_progress";
-        }
-        changed = true;
-    }
-    changed
-}
-
-fn status(value: Option<&str>) -> &'static str {
-    match value {
-        Some("completed") => "completed",
-        Some("in_progress") => "in_progress",
-        _ => "pending",
-    }
-}
-
-fn plan_update(steps: &[Step]) -> Value {
-    let entries: Vec<Value> = steps
-        .iter()
-        .map(|step| json!({"content": step.content, "status": step.status, "priority": "medium"}))
-        .collect();
-    json!({"sessionUpdate": "plan", "entries": entries})
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    fn call(name: &str, id: &str, input: Value) -> Value {
-        json!({"sessionUpdate": "tool_call", "toolCallId": id, "name": name,
-               "title": name, "status": "pending", "rawInput": input})
-    }
-
-    fn done(id: &str) -> Value {
-        json!({"sessionUpdate": "tool_call_update", "toolCallId": id, "status": "completed"})
-    }
-
-    fn result(id: &str, text: &str) -> Value {
-        json!({"sessionUpdate": "tool_call_update", "toolCallId": id, "status": "completed",
-               "content": [{"type": "content", "content": {"type": "text", "text": text}}]})
-    }
-
-    fn one(mut shown: Vec<Value>) -> Value {
-        assert_eq!(shown.len(), 1, "{shown:?}");
-        shown.remove(0)
-    }
-
-    fn card(update: &Value) -> &Value {
-        &update["_meta"]["lithe"]["claudeDesktop"]
-    }
-
-    fn statuses(update: &Value) -> Vec<&str> {
-        update["entries"]
-            .as_array()
-            .unwrap()
-            .iter()
-            .map(|e| e["status"].as_str().unwrap())
-            .collect()
-    }
-
-    /// The shared fixture is what a client decodes cards against, so it must be
-    /// exactly what this presenter produces for each recorded call sequence.
-    #[test]
-    fn presented_updates_match_the_shared_card_fixture() {
-        let fixture: Value = serde_json::from_str(include_str!(
-            "../../fixtures/agent/claude-desktop-cards-v1.json"
-        ))
-        .unwrap();
-        for case in fixture["cases"].as_array().unwrap() {
-            let mut presenter = Presenter::default();
-            let presented: Vec<Value> = case["updates"]
-                .as_array()
-                .unwrap()
-                .iter()
-                .flat_map(|update| presenter.present("s", update.clone()))
-                .collect();
-            assert_eq!(
-                Value::Array(presented),
-                case["presented"],
-                "{}",
-                case["name"]
-            );
-        }
-    }
-
-    #[test]
-    fn a_wrap_up_becomes_the_turn_answer_with_its_suggested_replies() {
-        let mut presenter = Presenter::default();
-        let input = json!({"recap": "PR opened.", "ask": "Mark it ready?",
-                           "actions": [{"label": "Yes", "message": "yes"}, {"label": "Not now"}]});
-        let shown = presenter.present("s", call(WRAP_UP_TOOL, "w", input));
-        assert_eq!(shown.len(), 2);
-        assert_eq!(shown[0]["sessionUpdate"], "agent_message_chunk");
-        assert_eq!(shown[0]["content"]["text"], "PR opened.\n\nMark it ready?");
-        assert_eq!(shown[1]["toolCallId"], "w#next");
-        assert_eq!(card(&shown[1])["card"], "nextStep");
-        assert_eq!(
-            card(&shown[1])["actions"],
-            json!([{"label": "Yes", "message": "yes"}])
-        );
-        assert!(presenter.present("s", done("w")).is_empty());
-
-        let recap_only = presenter.present("s", call(WRAP_UP_TOOL, "v", json!({"recap": "Done."})));
-        assert_eq!(recap_only.len(), 1);
-    }
-
-    #[test]
-    fn plan_calls_become_plan_updates_that_track_incremental_progress() {
-        let mut presenter = Presenter::default();
-        let items = json!({"items": [
-            {"content": "a", "status": "in_progress"},
-            {"content": "b", "status": "pending"},
-            {"content": "c", "status": "pending"},
-        ]});
-        let set = one(presenter.present("s", call(UPDATE_PLAN_TOOL, "p1", items)));
-        assert_eq!(set["sessionUpdate"], "plan");
-        assert_eq!(statuses(&set), ["in_progress", "pending", "pending"]);
-        assert!(presenter.present("s", done("p1")).is_empty());
-
-        let advanced =
-            one(presenter.present("s", call(UPDATE_PLAN_TOOL, "p2", json!({"advance": true}))));
-        assert_eq!(statuses(&advanced), ["completed", "in_progress", "pending"]);
-
-        let ticked = call(UPDATE_PLAN_TOOL, "p3", json!({"done": [2], "start": 3}));
-        let ticked = one(presenter.present("s", ticked));
-        assert_eq!(statuses(&ticked), ["completed", "completed", "in_progress"]);
-    }
-
-    #[test]
-    fn other_tools_empty_calls_and_unknown_sessions_pass_through() {
-        let mut presenter = Presenter::default();
-        let empty = call(WRAP_UP_TOOL, "w", json!({}));
-        assert_eq!(presenter.present("s", empty.clone()), vec![empty]);
-        assert_eq!(presenter.present("s", done("w")), vec![done("w")]);
-        // An increment without a list to apply it to stays a tool call, now titled.
-        let orphan = call(UPDATE_PLAN_TOOL, "p", json!({"advance": true}));
-        assert_eq!(
-            one(presenter.present("t", orphan))["title"],
-            "Updated the task list"
-        );
-        let bash = call("Bash", "b", json!({"command": "ls"}));
-        assert_eq!(presenter.present("s", bash.clone()), vec![bash]);
-        let other_server = call("mcp__dbx__dbx_list_connections", "d", json!({}));
-        assert_eq!(
-            presenter.present("s", other_server.clone()),
-            vec![other_server]
-        );
-        // A claude.ai connector is named by its id; a server merely resembling one is not.
-        let connector = call(
-            "mcp__1a59c906-04da-521d-bda7-7f71b9f9e01c__read",
-            "k",
-            json!({}),
-        );
-        let connector = one(presenter.present("s", connector));
-        assert_eq!(
-            (connector["title"].as_str(), connector["kind"].as_str()),
-            (Some("Connector: read"), Some("read"))
-        );
-        let lookalike = call("mcp__1a59c906-04da-521d-bda7__read", "l", json!({}));
-        assert_eq!(presenter.present("s", lookalike.clone()), vec![lookalike]);
-        let text = json!({"sessionUpdate": "agent_message_chunk", "content": {"type": "text", "text": "hi"}});
-        assert_eq!(presenter.present("s", text.clone()), vec![text]);
-    }
-
-    #[test]
-    fn chapters_pull_requests_folders_and_widgets_become_cards_with_readable_titles() {
-        let mut presenter = Presenter::default();
-        let input = json!({"title": "Core", "summary": "Rust first"});
-        let chapter =
-            one(presenter.present("s", call("mcp__ccd_session__mark_chapter", "c", input)));
-        assert_eq!(chapter["title"], "Chapter: Core");
-        assert_eq!(
-            card(&chapter),
-            &json!({"card": "chapter", "title": "Core", "summary": "Rust first"})
-        );
-        // Card calls keep their own results, so a failed call stays visible as one.
-        assert_eq!(presenter.present("s", done("c")), vec![done("c")]);
-        // A later update restating the adapter's title keeps the readable one.
-        let restated = json!({"sessionUpdate": "tool_call_update", "toolCallId": "c",
-                              "title": "mcp__ccd_session__mark_chapter", "kind": "other"});
-        assert_eq!(
-            one(presenter.present("s", restated))["title"],
-            "Chapter: Core"
-        );
-
-        let input = json!({"url": "https://github.com/o/r/pull/31", "auto_fix": true});
-        let pr = one(presenter.present("s", call("mcp__ccd_pr__set_monitor", "p", input)));
-        assert_eq!(card(&pr)["card"], "pullRequest");
-        assert_eq!(card(&pr)["action"], "monitored");
-        assert_eq!(card(&pr)["number"], 31);
-        assert_eq!(card(&pr)["autoFix"], true);
-
-        let input = json!({"path": "/w/other"});
-        let folder = one(presenter.present(
-            "s",
-            call("mcp__ccd_directory__change_directory", "d", input),
-        ));
-        assert_eq!(
-            card(&folder),
-            &json!({"card": "directory", "action": "changed", "path": "/w/other"})
-        );
-
-        let input = json!({"title": "vcs_layers", "widget_code": "<svg/>"});
-        let widget = one(presenter.present("s", call("mcp__visualize__show_widget", "v", input)));
-        assert_eq!(widget["title"], "Visualization: vcs layers");
-        assert_eq!(card(&widget)["code"], "<svg/>");
-    }
-
-    #[test]
-    fn panes_and_editor_requests_become_file_locations() {
-        let mut presenter = Presenter::default();
-        let input = json!({"pane": "file", "path": "notes/a.md"});
-        let pane = one(presenter.present("s", call("mcp__ccd_view__show_pane", "v", input)));
-        assert_eq!(pane["kind"], "read");
-        assert_eq!(pane["locations"], json!([{"path": "notes/a.md"}]));
-        let input = json!({"path": "/w/a.rs", "line": 12});
-        let editor = one(presenter.present("s", call("mcp__ccd_host__open_in_editor", "e", input)));
-        assert_eq!(
-            editor["locations"],
-            json!([{"path": "/w/a.rs", "line": 12}])
-        );
-        let layout = one(presenter.present(
-            "s",
-            call("mcp__ccd_window__get_window_layout", "l", json!({})),
-        ));
-        assert_eq!(layout["title"], "Claude Desktop: get window layout");
-        assert_eq!(layout["kind"], "read");
-        let shot = one(presenter.present(
-            "s",
-            call("mcp__computer-use__app_screenshot", "x", json!({})),
-        ));
-        assert_eq!(shot["title"], "Computer use: app screenshot");
-    }
-
-    #[test]
-    fn task_cards_follow_their_proposal_withdrawal_and_start() {
-        let mut presenter = Presenter::default();
-        let input = json!({"title": "Fix", "tldr": "Why", "prompt": "Do it"});
-        let proposed =
-            one(presenter.present("s", call("mcp__ccd_session__spawn_task", "t1", input)));
-        assert_eq!(card(&proposed)["state"], "proposed");
-        assert_eq!(card(&proposed)["prompt"], "Do it");
-        presenter.present(
-            "s",
-            result(
-                "t1",
-                "Noted (position 1, task_id: task_9edecafe). A chip is showing",
-            ),
-        );
-
-        // The withdrawal call itself is absorbed; its result restates the card.
-        let dismiss = call(
-            "mcp__ccd_session__dismiss_task",
-            "x",
-            json!({"task_id": "task_9edecafe"}),
-        );
-        assert!(presenter.present("s", dismiss).is_empty());
-        let withdrawn = one(presenter.present("s", result("x", "Task task_9edecafe withdrawn")));
-        assert_eq!(withdrawn["toolCallId"], "t1");
-        assert_eq!(card(&withdrawn)["state"], "withdrawn");
-
-        let input = json!({"initiation": "own_initiative", "title": "Move", "prompt": "Go"});
-        presenter.present("s", call("mcp__ccd_session__start_session", "t2", input));
-        presenter.present(
-            "s",
-            result(
-                "t2",
-                "Proposed \"Move\" (task_id: task_0f1ad1a7). The user sees a card",
-            ),
-        );
-        let start = call(
-            "mcp__ccd_session__start_session",
-            "y",
-            json!({"proposal_id": "task_0f1ad1a7"}),
-        );
-        assert!(presenter.present("s", start).is_empty());
-        assert_eq!(
-            card(&one(presenter.present("s", done("y"))))["state"],
-            "started"
-        );
-
-        let dismiss = call(
-            "mcp__ccd_session__dismiss_task",
-            "z",
-            json!({"task_id": "task_0f1ad1a7"}),
-        );
-        presenter.present("s", dismiss);
-        let late =
-            one(presenter.present("s", result("z", "Task task_0f1ad1a7 was already started")));
-        assert_eq!(card(&late)["state"], "started");
-
-        let input = json!({"title": "Stats", "remaining_plan": "\nDone: x\nNext: y"});
-        let handoff = one(presenter.present(
-            "s",
-            call("mcp__ccd_session__hand_off_to_session", "h", input),
-        ));
-        assert_eq!(card(&handoff)["state"], "handedOff");
-        assert_eq!(card(&handoff)["summary"], "Done: x");
-    }
-
-    #[test]
-    fn failed_task_actions_stay_visible_and_progress_does_not_change_the_card() {
-        let mut presenter = Presenter::default();
-        presenter.present(
-            "s",
-            call(
-                "mcp__ccd_session__spawn_task",
-                "t1",
-                json!({"title": "Fix", "prompt": "Do it"}),
-            ),
-        );
-        presenter.present("s", result("t1", "Noted (task_id: task_9edecafe)."));
-
-        let dismiss = call(
-            "mcp__ccd_session__dismiss_task",
-            "x",
-            json!({"task_id": "task_9edecafe"}),
-        );
-        assert!(presenter.present("s", dismiss).is_empty());
-        let progress = json!({"sessionUpdate": "tool_call_update", "toolCallId": "x", "status": "in_progress"});
-        assert!(
-            presenter.present("s", progress).is_empty(),
-            "Progress must not withdraw the card"
-        );
-        let failed = json!({"sessionUpdate": "tool_call_update", "toolCallId": "x", "status": "failed",
-                            "content": [{"type": "content", "content": {"type": "text", "text": "Denied"}}]});
-        let shown = presenter.present("s", failed);
-        assert_eq!(shown.len(), 2, "{shown:?}");
-        assert_eq!(shown[0]["sessionUpdate"], "tool_call");
-        assert_eq!(shown[0]["toolCallId"], "x");
-        assert_eq!(shown[0]["title"], "Withdrew a suggested task");
-        assert_eq!(shown[1]["status"], "failed");
-
-        let start = call(
-            "mcp__ccd_session__start_session",
-            "y",
-            json!({"proposal_id": "task_9edecafe"}),
-        );
-        assert!(presenter.present("s", start).is_empty());
-        let failed =
-            json!({"sessionUpdate": "tool_call_update", "toolCallId": "y", "status": "failed"});
-        assert_eq!(
-            presenter.present("s", failed)[0]["title"],
-            "Started a suggested task"
-        );
-    }
-
-    #[test]
-    fn created_pull_request_tags_become_links() {
-        let mut presenter = Presenter::default();
-        let chunk = |text: &str| json!({"sessionUpdate": "agent_message_chunk", "content": {"type": "text", "text": text}});
-        let tagged = chunk("Opened.\n<pr-created>https://github.com/o/r/pull/7</pr-created>\n");
-        let shown = one(presenter.present("s", tagged));
-        assert_eq!(
-            shown["content"]["text"],
-            "Opened.\n[Pull request #7](https://github.com/o/r/pull/7)\n"
-        );
-        // Anything but a URL is left as the model wrote it.
-        let odd = chunk("<pr-created>not a url</pr-created>");
-        assert_eq!(one(presenter.present("s", odd.clone())), odd);
-    }
-}
diff --git a/rust/lithe-agent-host/src/claude_earlier_history.rs b/rust/lithe-agent-host/src/claude_earlier_history.rs
deleted file mode 100644
index ac9123dd..00000000
--- a/rust/lithe-agent-host/src/claude_earlier_history.rs
+++ /dev/null
@@ -1,559 +0,0 @@
-//! Transcript segments that Claude Code compaction hides from `session/load`.
-//!
-//! The Claude Agent SDK replays only the active parent chain. A compaction
-//! boundary has no parent, so everything before the latest boundary is on disk
-//! but never reaches the client. This module reads those earlier segments from
-//! the account's project transcript, read-only and bounded, and renders them as
-//! the same ACP updates a replay would carry. The adapter's own replay then
-//! continues from the latest boundary, so nothing is shown twice.
-//!
-//! Only `<config dir>/projects/*/<session id>.jsonl` is opened. Credentials and
-//! the rest of the account directory stay untouched, and nothing is written.
-
-use std::fs::File;
-use std::io::{BufRead, BufReader};
-use std::path::{Path, PathBuf};
-
-use serde_json::{json, Value};
-
-use crate::claude_desktop;
-
-/// Larger transcripts are skipped rather than read: the recap alone is shown.
-const MAX_TRANSCRIPT_BYTES: u64 = 128 * 1024 * 1024;
-/// Upper bound on emitted updates, keeping the replay event queue bounded.
-const MAX_UPDATES: usize = 30_000;
-/// Per-field text limit, in characters, for tool output and tool input values.
-const TEXT_LIMIT: usize = 4_000;
-/// Longest base64 image replayed, in bytes: the client's 10 MB decoded limit
-/// (`AgentImage.maximumBytes`) inflated by a third. A larger screenshot would only
-/// be dropped on arrival, so it is not sent.
-const IMAGE_DATA_LIMIT: usize = 10_000_000 / 3 * 4;
-
-/// Projects directory of the account the adapter runs under: the explicit
-/// account directory, then `CLAUDE_CONFIG_DIR`, then `~/.claude`.
-pub(crate) fn projects_directory(config_dir: Option<&Path>) -> Option<PathBuf> {
-    let base = match config_dir {
-        Some(directory) => directory.to_path_buf(),
-        None => match std::env::var_os("CLAUDE_CONFIG_DIR").filter(|v| !v.is_empty()) {
-            Some(directory) => PathBuf::from(directory),
-            None => PathBuf::from(std::env::var_os(if cfg!(windows) {
-                "USERPROFILE"
-            } else {
-                "HOME"
-            })?)
-            .join(".claude"),
-        },
-    };
-    base.is_absolute().then(|| base.join("projects"))
-}
-
-/// Updates for every transcript row before the latest compaction boundary, in
-/// order. Empty when the session was never compacted or the file is unusable.
-pub(crate) fn earlier_updates(projects: &Path, cwd: &Path, session_id: &str) -> Vec<Value> {
-    // The id becomes a file name, so anything but a plain identifier is refused.
-    if session_id.is_empty()
-        || !session_id
-            .chars()
-            .all(|c| c.is_ascii_alphanumeric() || c == '-' || c == '_')
-    {
-        return Vec::new();
-    }
-    let Some(path) = locate(projects, cwd, session_id) else {
-        return Vec::new();
-    };
-    let Some(boundary) = last_boundary_line(&path) else {
-        return Vec::new();
-    };
-    let Ok(file) = File::open(&path) else {
-        return Vec::new();
-    };
-    let mut converter = Converter::default();
-    for line in BufReader::new(file).lines().take(boundary) {
-        let Ok(line) = line else { break };
-        if let Ok(row) = serde_json::from_str::<Value>(&line) {
-            converter.row(&row);
-        }
-        if converter.updates.len() >= MAX_UPDATES {
-            break;
-        }
-    }
-    converter.updates
-}
-
-/// Claude names a project directory after its workspace with every character
-/// outside `[A-Za-z0-9]` replaced by `-`; other directories are searched when
-/// that name does not match, for example after Claude shortens a long path.
-fn locate(projects: &Path, cwd: &Path, session_id: &str) -> Option<PathBuf> {
-    let name = format!("{session_id}.jsonl");
-    let encoded: String = cwd
-        .to_string_lossy()
-        .chars()
-        .map(|c| if c.is_ascii_alphanumeric() { c } else { '-' })
-        .collect();
-    let direct = projects.join(encoded).join(&name);
-    let found = if direct.is_file() {
-        Some(direct)
-    } else {
-        std::fs::read_dir(projects)
-            .ok()?
-            .filter_map(Result::ok)
-            .map(|entry| entry.path().join(&name))
-            .find(|candidate| candidate.is_file())
-    }?;
-    (found.metadata().ok()?.len() <= MAX_TRANSCRIPT_BYTES).then_some(found)
-}
-
-/// Zero-based line of the latest `compact_boundary` record.
-fn last_boundary_line(path: &Path) -> Option<usize> {
-    let mut latest = None;
-    for (index, line) in BufReader::new(File::open(path).ok()?).lines().enumerate() {
-        let Ok(line) = line else { break };
-        // Cheap substring test first; most rows are never parsed.
-        if !line.contains("compact_boundary") {
-            continue;
-        }
-        if let Ok(row) = serde_json::from_str::<Value>(&line) {
-            if row["type"] == "system" && row["subtype"] == "compact_boundary" {
-                latest = Some(index);
-            }
-        }
-    }
-    latest
-}
-
-/// Which kind of text chunk was emitted last, so a new chunk of the same kind
-/// starts a new paragraph instead of fusing with the previous message.
-#[derive(Clone, Copy, PartialEq, Eq)]
-enum Chunk {
-    User,
-    Agent,
-    Thought,
-}
-
-#[derive(Default)]
-struct Converter {
-    updates: Vec<Value>,
-    last: Option<Chunk>,
-    /// `uuid` of the row being converted; stamps user chunks so the client can
-    /// tell consecutive user messages apart, as the adapter's own replay does.
-    row_id: Option<String>,
-}
-
-impl Converter {
-    fn row(&mut self, row: &Value) {
-        // Subagent sidechains and meta rows (hooks, reminders) are not conversation.
-        if row["isSidechain"] == true || row["isMeta"] == true {
-            return;
-        }
-        self.row_id = row["uuid"].as_str().map(str::to_owned);
-        let role = match row["type"].as_str() {
-            Some("user") => Chunk::User,
-            Some("assistant") => Chunk::Agent,
-            // A prompt sent while a turn was running is stored only as this
-            // attachment, never as a user row, so it is the message itself.
-            Some("attachment") if row["attachment"]["type"] == "queued_command" => {
-                return self.content(Chunk::User, &row["attachment"]["prompt"]);
-            }
-            _ => return,
-        };
-        // API error stand-ins are synthesized by the CLI, not model output.
-        if row["message"]["model"] == "<synthetic>" {
-            return;
-        }
-        self.content(role, &row["message"]["content"]);
-    }
-
-    fn content(&mut self, role: Chunk, content: &Value) {
-        match content {
-            Value::String(text) if role == Chunk::User => self.text(Chunk::User, text),
-            Value::Array(blocks) => {
-                for block in blocks {
-                    self.block(role, block);
-                }
-            }
-            _ => {}
-        }
-    }
-
-    fn block(&mut self, role: Chunk, block: &Value) {
-        match (role, block["type"].as_str()) {
-            (Chunk::User, Some("text")) => {
-                self.text(Chunk::User, block["text"].as_str().unwrap_or(""))
-            }
-            (Chunk::Agent, Some("text")) => {
-                self.text(Chunk::Agent, block["text"].as_str().unwrap_or(""))
-            }
-            (Chunk::Agent, Some("thinking")) => {
-                self.text(Chunk::Thought, block["thinking"].as_str().unwrap_or(""))
-            }
-            (Chunk::Agent, Some("tool_use")) => self.tool_call(block),
-            (Chunk::User, Some("tool_result")) => self.tool_result(block),
-            (Chunk::User, Some("image")) => self.user_image(block),
-            _ => {}
-        }
-    }
-
-    /// A pasted screenshot stays attached to the user message that references
-    /// it. Only inline base64 sources are replayed; the client bounds the size.
-    fn user_image(&mut self, block: &Value) {
-        let source = &block["source"];
-        let (Some("base64"), Some(data)) = (source["type"].as_str(), source["data"].as_str())
-        else {
-            return;
-        };
-        if data.is_empty() || data.len() > IMAGE_DATA_LIMIT {
-            return;
-        }
-        self.last = Some(Chunk::User);
-        let mut update = json!({
-            "sessionUpdate": "user_message_chunk",
-            "content": {
-                "type": "image",
-                "data": data,
-                "mimeType": source["media_type"].as_str().unwrap_or("image/png"),
-            },
-        });
-        if let Some(id) = &self.row_id {
-            update["messageId"] = json!(id);
-        }
-        self.updates.push(update);
-    }
-
-    fn text(&mut self, kind: Chunk, text: &str) {
-        if text.trim().is_empty() {
-            return;
-        }
-        let name = match kind {
-            Chunk::User => "user_message_chunk",
-            Chunk::Agent => "agent_message_chunk",
-            Chunk::Thought => "agent_thought_chunk",
-        };
-        // Same-kind chunks of one reply are fused by the client, so a new
-        // reply needs a break; user messages are told apart by message id.
-        let text = if kind != Chunk::User && self.last == Some(kind) {
-            format!("\n\n{text}")
-        } else {
-            text.to_owned()
-        };
-        self.last = Some(kind);
-        let mut update = json!({"sessionUpdate": name, "content": {"type": "text", "text": text}});
-        if let (Chunk::User, Some(id)) = (kind, &self.row_id) {
-            update["messageId"] = json!(id);
-        }
-        self.updates.push(update);
-    }
-
-    fn tool_call(&mut self, block: &Value) {
-        let Some(id) = block["id"].as_str() else {
-            return;
-        };
-        let name = block["name"].as_str().unwrap_or("Tool");
-        let input = &block["input"];
-        self.last = None;
-        self.updates.push(json!({
-            "sessionUpdate": "tool_call",
-            "toolCallId": id,
-            "name": name,
-            "title": title(name, input),
-            "kind": kind(name),
-            "status": "completed",
-            // A card, plan or reply is built from this input, so it is not cut to a preview.
-            "rawInput": if claude_desktop::carries_card_input(name) {
-                bounded(input, claude_desktop::CARD_INPUT_LIMIT)
-            } else {
-                bounded(input, TEXT_LIMIT)
-            },
-        }));
-    }
-
-    fn tool_result(&mut self, block: &Value) {
-        let Some(id) = block["tool_use_id"].as_str() else {
-            return;
-        };
-        let text = match &block["content"] {
-            Value::String(text) => text.clone(),
-            Value::Array(parts) => parts
-                .iter()
-                .filter_map(|part| part["text"].as_str())
-                .collect::<Vec<_>>()
-                .join("\n"),
-            _ => String::new(),
-        };
-        self.last = None;
-        let mut update = json!({
-            "sessionUpdate": "tool_call_update",
-            "toolCallId": id,
-            "status": if block["is_error"] == true { "failed" } else { "completed" },
-        });
-        if !text.trim().is_empty() {
-            update["content"] =
-                json!([{"type": "content", "content": {"type": "text", "text": truncate(&text)}}]);
-        }
-        self.updates.push(update);
-    }
-}
-
-/// ACP tool kind of a Claude Code tool, as the adapter classifies them.
-fn kind(name: &str) -> &'static str {
-    match name {
-        "Bash" | "BashOutput" | "KillShell" => "execute",
-        "Read" | "NotebookRead" => "read",
-        "Edit" | "MultiEdit" | "Write" | "NotebookEdit" => "edit",
-        "Grep" | "Glob" => "search",
-        "WebFetch" | "WebSearch" => "fetch",
-        "Task" | "Agent" | "TodoWrite" => "think",
-        _ => "other",
-    }
-}
-
-/// Row title in the adapter's style: the command or target, not the tool name alone.
-fn title(name: &str, input: &Value) -> String {
-    let field = |key: &str| input[key].as_str().filter(|v| !v.is_empty());
-    let detail = match name {
-        "Bash" => field("description").or_else(|| field("command")),
-        "Read" | "Edit" | "MultiEdit" | "Write" | "NotebookEdit" => {
-            field("file_path").or_else(|| field("notebook_path"))
-        }
-        "Grep" | "Glob" => field("pattern"),
-        "WebFetch" => field("url"),
-        "WebSearch" => field("query"),
-        "Task" | "Agent" => field("description"),
-        _ => None,
-    };
-    match detail {
-        Some(detail) => {
-            let first = detail.lines().next().unwrap_or(detail);
-            truncate_to(&format!("{name} {first}"), 200)
-        }
-        None => name.to_owned(),
-    }
-}
-
-/// Copy of `value` whose strings are cut to `limit` characters, so a whole-file
-/// `Write` input does not travel through the replay queue.
-fn bounded(value: &Value, limit: usize) -> Value {
-    match value {
-        Value::String(text) => Value::String(truncate_to(text, limit)),
-        Value::Array(items) => {
-            Value::Array(items.iter().map(|item| bounded(item, limit)).collect())
-        }
-        Value::Object(map) => Value::Object(
-            map.iter()
-                .map(|(k, v)| (k.clone(), bounded(v, limit)))
-                .collect(),
-        ),
-        other => other.clone(),
-    }
-}
-
-fn truncate(text: &str) -> String {
-    truncate_to(text, TEXT_LIMIT)
-}
-
-fn truncate_to(text: &str, limit: usize) -> String {
-    match text.char_indices().nth(limit) {
-        Some((index, _)) => format!("{}…", &text[..index]),
-        None => text.to_owned(),
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use std::io::Write;
-
-    /// Writes `rows` as a transcript under a fresh projects directory and
-    /// returns that directory together with the workspace it belongs to.
-    fn transcript(rows: &[Value]) -> (tempdir::Dir, PathBuf) {
-        let dir = tempdir::Dir::new();
-        let cwd = PathBuf::from("/work/my.app");
-        let project = dir.path().join("-work-my-app");
-        std::fs::create_dir_all(&project).unwrap();
-        let mut file = File::create(project.join("abc-1.jsonl")).unwrap();
-        for row in rows {
-            writeln!(file, "{row}").unwrap();
-        }
-        (dir, cwd)
-    }
-
-    fn user(text: &str) -> Value {
-        json!({"type": "user", "uuid": text, "message": {"role": "user", "content": text}})
-    }
-
-    fn boundary() -> Value {
-        json!({"type": "system", "subtype": "compact_boundary", "parentUuid": null})
-    }
-
-    #[test]
-    fn replays_only_what_precedes_the_latest_boundary() {
-        let (dir, cwd) = transcript(&[
-            user("first question"),
-            json!({"type": "assistant", "message": {"content": [
-                {"type": "thinking", "thinking": "hmm"},
-                {"type": "text", "text": "first answer"},
-                {"type": "tool_use", "id": "t1", "name": "Bash", "input": {"command": "ls", "description": "List files"}},
-            ]}}),
-            json!({"type": "user", "message": {"content": [
-                {"type": "tool_result", "tool_use_id": "t1", "content": "a\nb"},
-            ]}}),
-            boundary(),
-            user("This session is being continued from a previous conversation"),
-            user("second question"),
-            boundary(),
-            user("after the last boundary"),
-        ]);
-        let updates = earlier_updates(dir.path(), &cwd, "abc-1");
-        let kinds: Vec<_> = updates
-            .iter()
-            .map(|u| u["sessionUpdate"].as_str().unwrap())
-            .collect();
-        assert_eq!(
-            kinds,
-            [
-                "user_message_chunk",
-                "agent_thought_chunk",
-                "agent_message_chunk",
-                "tool_call",
-                "tool_call_update",
-                "user_message_chunk",
-                "user_message_chunk",
-            ]
-        );
-        assert_eq!(updates[3]["title"], "Bash List files");
-        assert_eq!(updates[3]["kind"], "execute");
-        assert_eq!(updates[4]["content"][0]["content"]["text"], "a\nb");
-        // Two user rows in a row must not fuse into one bubble.
-        assert_ne!(updates[5]["messageId"], updates[6]["messageId"]);
-        assert!(updates[5]["messageId"].is_string());
-    }
-
-    #[test]
-    fn an_uncompacted_or_unsafe_session_yields_nothing() {
-        let (dir, cwd) = transcript(&[user("hi")]);
-        assert!(earlier_updates(dir.path(), &cwd, "abc-1").is_empty());
-        assert!(earlier_updates(dir.path(), &cwd, "../abc-1").is_empty());
-        assert!(earlier_updates(dir.path(), &cwd, "missing").is_empty());
-    }
-
-    #[test]
-    fn sidechains_meta_rows_and_failed_results_are_classified() {
-        let (dir, cwd) = transcript(&[
-            json!({"type": "user", "isMeta": true, "message": {"content": "reminder"}}),
-            json!({"type": "assistant", "isSidechain": true, "message": {"content": [{"type": "text", "text": "child"}]}}),
-            json!({"type": "assistant", "message": {"content": [{"type": "tool_use", "id": "t", "name": "Read", "input": {"file_path": "/a/b.rs"}}]}}),
-            json!({"type": "user", "message": {"content": [{"type": "tool_result", "tool_use_id": "t", "is_error": true, "content": [{"type": "text", "text": "denied"}]}]}}),
-            boundary(),
-        ]);
-        let updates = earlier_updates(dir.path(), &cwd, "abc-1");
-        assert_eq!(updates.len(), 2);
-        assert_eq!(updates[0]["title"], "Read /a/b.rs");
-        assert_eq!(updates[1]["status"], "failed");
-    }
-
-    #[test]
-    fn prompts_queued_during_a_turn_and_tool_names_are_kept() {
-        let (dir, cwd) = transcript(&[
-            json!({"type": "assistant", "message": {"content": [{"type": "tool_use", "id": "w", "name": "mcp__ccd_turn__wrap_up", "input": {"recap": "done"}}]}}),
-            json!({"type": "attachment", "uuid": "q1", "attachment": {"type": "queued_command", "prompt": "go faster"}}),
-            json!({"type": "attachment", "uuid": "r1", "attachment": {"type": "total_tokens_reminder"}}),
-            boundary(),
-        ]);
-        let updates = earlier_updates(dir.path(), &cwd, "abc-1");
-        assert_eq!(updates.len(), 2);
-        assert_eq!(updates[0]["name"], "mcp__ccd_turn__wrap_up");
-        assert_eq!(updates[1]["sessionUpdate"], "user_message_chunk");
-        assert_eq!(updates[1]["content"]["text"], "go faster");
-        assert_eq!(updates[1]["messageId"], "q1");
-    }
-
-    #[test]
-    fn card_inputs_survive_the_replay_whole_while_other_tool_inputs_are_cut() {
-        let widget = format!("<svg>{}</svg>", "x".repeat(TEXT_LIMIT * 2));
-        let (dir, cwd) = transcript(&[
-            json!({"type": "assistant", "message": {"content": [
-                {"type": "tool_use", "id": "v", "name": "mcp__visualize__show_widget",
-                 "input": {"title": "chart", "widget_code": widget}},
-                {"type": "tool_use", "id": "w", "name": "Write",
-                 "input": {"file_path": "/a/b.rs", "content": "y".repeat(TEXT_LIMIT * 2)}},
-            ]}}),
-            boundary(),
-        ]);
-        let updates = earlier_updates(dir.path(), &cwd, "abc-1");
-        let mut presenter = claude_desktop::Presenter::default();
-        let shown = presenter.present("s", updates[0].clone());
-        assert_eq!(
-            shown[0]["_meta"]["lithe"]["claudeDesktop"]["code"],
-            widget.as_str()
-        );
-        let write = updates[1]["rawInput"]["content"].as_str().unwrap();
-        assert_eq!(
-            write.chars().count(),
-            TEXT_LIMIT + 1,
-            "Ordinary inputs stay previews"
-        );
-    }
-
-    #[test]
-    fn pasted_screenshots_stay_on_the_user_message_that_references_them() {
-        let (dir, cwd) = transcript(&[
-            json!({"type": "user", "uuid": "u1", "message": {"content": [
-                {"type": "text", "text": "[Image #1] look"},
-                {"type": "image", "source": {"type": "base64", "media_type": "image/jpeg", "data": "/9j/4A=="}},
-                {"type": "image", "source": {"type": "url", "url": "https://example.test/a.png"}},
-                {"type": "image", "source": {"type": "base64", "media_type": "image/png", "data": ""}},
-                {"type": "image", "source": {"type": "base64", "media_type": "image/png", "data": "A".repeat(IMAGE_DATA_LIMIT + 4)}},
-            ]}}),
-            boundary(),
-        ]);
-        let updates = earlier_updates(dir.path(), &cwd, "abc-1");
-        assert_eq!(
-            updates.len(),
-            2,
-            "only the inline base64 image within the limit is replayed"
-        );
-        assert_eq!(updates[1]["sessionUpdate"], "user_message_chunk");
-        assert_eq!(updates[1]["content"]["type"], "image");
-        assert_eq!(updates[1]["content"]["data"], "/9j/4A==");
-        assert_eq!(updates[1]["content"]["mimeType"], "image/jpeg");
-        assert_eq!(updates[1]["messageId"], updates[0]["messageId"]);
-    }
-
-    #[test]
-    fn long_text_is_cut_on_a_character_boundary() {
-        let long = "é".repeat(TEXT_LIMIT + 10);
-        let cut = truncate(&long);
-        assert_eq!(cut.chars().count(), TEXT_LIMIT + 1);
-        assert!(cut.ends_with('…'));
-    }
-
-    /// Minimal self-cleaning temporary directory; the crate has no tempfile dependency.
-    mod tempdir {
-        use std::path::{Path, PathBuf};
-
-        pub struct Dir(PathBuf);
-
-        impl Dir {
-            pub fn new() -> Self {
-                use std::sync::atomic::{AtomicU32, Ordering};
-                static NEXT: AtomicU32 = AtomicU32::new(0);
-                let path = std::env::temp_dir().join(format!(
-                    "lithe-earlier-history-{}-{}",
-                    std::process::id(),
-                    NEXT.fetch_add(1, Ordering::Relaxed)
-                ));
-                std::fs::create_dir_all(&path).unwrap();
-                Self(path)
-            }
-
-            pub fn path(&self) -> &Path {
-                &self.0
-            }
-        }
-
-        impl Drop for Dir {
-            fn drop(&mut self) {
-                let _ = std::fs::remove_dir_all(&self.0);
-            }
-        }
-    }
-}
diff --git a/rust/lithe-agent-host/src/claude_subscription.rs b/rust/lithe-agent-host/src/claude_subscription.rs
deleted file mode 100644
index c7cfa4ff..00000000
--- a/rust/lithe-agent-host/src/claude_subscription.rs
+++ /dev/null
@@ -1,151 +0,0 @@
-//! Claude Code subscription access through the user's own signed-in CLI.
-//!
-//! The installed ACP adapter runs the user's Claude Code, which owns the
-//! claude.ai login and its credentials. Lithe passes no key and never reads,
-//! copies, stores or refreshes a token: this mode refrains from the API-key
-//! overrides and reports whether the CLI is signed in. With model-call
-//! statistics on, the only route Lithe adds is the loopback observation proxy
-//! (`ANTHROPIC_BASE_URL`), which forwards every request byte-for-byte to the
-//! official origin; the CLI keeps sending its own credentials in its headers.
-
-use super::*;
-
-/// Shown when the adapter reports a signed-out CLI. Lithe does not start a
-/// browser login; the user signs in with the CLI they already use.
-pub(super) const SIGN_IN_REQUIRED: &str =
-    "Claude Code is not signed in. Run `claude` in a terminal, sign in with /login, then retry.";
-
-/// The adapter probes `claude auth status` at initialization with a 5 second
-/// bound of its own. A missing report is "unknown", never "signed out".
-const STATUS_TIMEOUT: Duration = Duration::from_secs(8);
-
-/// Variables inherited from Lithe's environment that would outrank the
-/// subscription login or pin a model the restored session does not own.
-pub(super) const INHERITED_OVERRIDES: [&str; 6] = [
-    "ANTHROPIC_API_KEY",
-    "ANTHROPIC_AUTH_TOKEN",
-    "ANTHROPIC_BASE_URL",
-    "ANTHROPIC_MODEL",
-    "CLAUDE_CODE_OAUTH_TOKEN",
-    // An inherited executable can be an unusable Windows batch shim; the
-    // resolved CLI path is added back through the launch environment.
-    "CLAUDE_CODE_EXECUTABLE",
-];
-
-/// Official inference origin the observation proxy forwards to.
-pub(super) const INFERENCE_ORIGIN: &str = "https://api.anthropic.com";
-
-/// Whether the user points Claude Code at their own endpoint, through the
-/// launch environment or the inherited process environment.
-pub(super) fn has_custom_base_url(launch: &ResolvedLaunch) -> bool {
-    let is_custom = |value: &str| {
-        let value = value.trim().trim_end_matches('/');
-        !value.is_empty() && value != INFERENCE_ORIGIN
-    };
-    match launch
-        .env
-        .iter()
-        .find(|(name, _)| name == "ANTHROPIC_BASE_URL")
-    {
-        Some((_, value)) => is_custom(value),
-        None => std::env::var("ANTHROPIC_BASE_URL").is_ok_and(|value| is_custom(&value)),
-    }
-}
-
-/// Route Claude Code's requests through the loopback observation proxy. Only the
-/// base URL changes; authentication stays with the CLI and the proxy forwards it
-/// untouched, so the billing source and account are the ones the user signed in with.
-pub(super) fn observe_model_calls(launch: &mut ResolvedLaunch, proxy: &str) {
-    launch.env.retain(|(name, _)| name != "ANTHROPIC_BASE_URL");
-    launch
-        .env
-        .push(("ANTHROPIC_BASE_URL".into(), proxy.to_owned()));
-}
-
-/// Claude Code's own switch for selecting an isolated account directory.
-pub(super) const CONFIG_DIR_ENVIRONMENT: &str = "CLAUDE_CONFIG_DIR";
-
-/// Launch the installed Claude adapter against the detected Claude Code CLI,
-/// without an API provider.
-pub(super) fn resolve(
-    launch: AgentLaunch,
-    find_cli: &dyn Fn(&str) -> Option<environment::DetectedTool>,
-) -> Result<ResolvedLaunch, String> {
-    if launch.agent_id.as_deref() != Some("claude-acp") {
-        return Err("Claude subscription sign-in is only available for Claude Agent".into());
-    }
-    if !launch.cwd.is_absolute() {
-        return Err("The workspace path must be absolute".into());
-    }
-    let data = launch
-        .data_directory
-        .ok_or("The Agent install directory is not configured")?;
-    let agent = catalog::find("claude-acp").ok_or("Claude Agent is unavailable")?;
-    if install::installed_version(&data, agent).is_none() {
-        return Err("Claude Agent is not installed. Install it in Agent Settings.".into());
-    }
-    let cli = agent.cli.as_ref().ok_or("Claude Code is unavailable")?;
-    let detected = find_cli(cli.command);
-    if let Some(issue) = install::cli_issue(cli, detected.as_ref()) {
-        return Err(issue);
-    }
-    let detected = detected.ok_or("Claude Code is unavailable")?;
-    let mut env: Vec<(String, String)> = cli_path_env(cli, &detected).into_iter().collect();
-    env.extend(claude_context_env(launch.context_limits));
-    if let Some(directory) = launch.claude_config_dir {
-        // A relative path would resolve against the adapter's working directory
-        // and silently select a different account than the one the user chose.
-        if !directory.is_absolute() {
-            return Err("The Claude account directory must be an absolute path".into());
-        }
-        env.retain(|(name, _)| name != CONFIG_DIR_ENVIRONMENT);
-        env.push((
-            CONFIG_DIR_ENVIRONMENT.into(),
-            directory.to_string_lossy().into_owned(),
-        ));
-    }
-    let claude_projects = crate::claude_earlier_history::projects_directory(
-        env.iter()
-            .find(|(name, _)| name == CONFIG_DIR_ENVIRONMENT)
-            .map(|(_, value)| std::path::Path::new(value)),
-    );
-    Ok(ResolvedLaunch {
-        command: install::installed_command(&data, agent),
-        args: launch.args,
-        cwd: launch.cwd,
-        env,
-        gateway: None,
-        secret: String::new(),
-        subscription_cli: None,
-        claude_subscription: true,
-        codex_home: None,
-        claude_projects,
-    })
-}
-
-/// Fail the connection with an actionable message when the CLI is signed out.
-/// A status that never arrives, or any signed-in kind (account, API key,
-/// external backend), lets the connection continue unchanged. A claude.ai
-/// account the adapter reported is returned for display only.
-pub(super) async fn ensure_signed_in(
-    status: &mut tokio::sync::watch::Receiver<Option<subscription::AuthStatus>>,
-) -> Result<Option<subscription::Account>, String> {
-    let reported = tokio::time::timeout(STATUS_TIMEOUT, async {
-        loop {
-            if let Some(value) = status.borrow_and_update().clone() {
-                return Some(value);
-            }
-            if status.changed().await.is_err() {
-                return None;
-            }
-        }
-    })
-    .await
-    .ok()
-    .flatten();
-    match reported {
-        Some(value) if value.kind == "none" => Err(SIGN_IN_REQUIRED.into()),
-        Some(value) if value.kind == "account" => Ok(value.account),
-        _ => Ok(None),
-    }
-}
diff --git a/rust/lithe-agent-host/src/cli_update.rs b/rust/lithe-agent-host/src/cli_update.rs
deleted file mode 100644
index ebf8e735..00000000
--- a/rust/lithe-agent-host/src/cli_update.rs
+++ /dev/null
@@ -1,627 +0,0 @@
-//! Identify the installation owning the active CLI before selecting an updater.
-//! Package managers retain their fetching, validation, cache and release channels.
-
-use std::ffi::OsStr;
-use std::io::Read;
-use std::path::{Path, PathBuf};
-use std::process::Command;
-use std::time::Duration;
-
-use serde::{Deserialize, Serialize};
-
-use crate::catalog::AgentCli;
-use crate::environment::{self, RunError, RuntimeEnvironment};
-use crate::install::ManagementError;
-
-const PROBE_TIMEOUT: Duration = Duration::from_secs(3);
-pub(crate) const MANUAL_HINT: &str =
-    "Update this CLI using its original installer, then check again.";
-
-/// Installation provenance of the executable selected by the launch PATH.
-#[derive(Clone, Debug, Deserialize, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub enum CliSource {
-    Npm,
-    Homebrew,
-    Native,
-    Missing,
-    Unknown,
-}
-
-/// Presentation facts; hosts must not execute the displayed update hint.
-#[derive(Clone, Debug, Deserialize, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct CliInstallation {
-    pub source: CliSource,
-    pub can_update: bool,
-    pub update_hint: String,
-    /// Whether the owning package manager confirmed a newer CLI release.
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub update_available: Option<bool>,
-    /// Bounded read-only probe failure; absence of a protocol is not a failed probe.
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub update_check_error: Option<String>,
-    /// Target version returned by the same read-only package-manager query.
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub available_version: Option<String>,
-}
-
-/// An owned executable and arguments, never an interpolated shell command.
-#[derive(Debug)]
-pub(crate) struct UpdateCommand {
-    pub program: PathBuf,
-    pub arguments: Vec<String>,
-    pub observes_npm: bool,
-}
-
-/// Freshly resolved ownership evidence and the permitted updater, if any.
-#[derive(Debug)]
-pub(crate) struct UpdatePlan {
-    pub installation: CliInstallation,
-    pub command: Option<UpdateCommand>,
-}
-
-impl UpdatePlan {
-    fn manual(source: CliSource, hint: &str) -> Self {
-        Self {
-            installation: CliInstallation {
-                source,
-                can_update: false,
-                update_hint: hint.into(),
-                update_available: None,
-                update_check_error: None,
-                available_version: None,
-            },
-            command: None,
-        }
-    }
-
-    fn automatic(
-        source: CliSource,
-        hint: String,
-        program: &Path,
-        arguments: Vec<String>,
-        observes_npm: bool,
-    ) -> Self {
-        Self {
-            installation: CliInstallation {
-                source,
-                can_update: true,
-                update_hint: hint,
-                update_available: None,
-                update_check_error: None,
-                available_version: None,
-            },
-            command: Some(UpdateCommand {
-                program: program.into(),
-                arguments,
-                observes_npm,
-            }),
-        }
-    }
-}
-
-/// A confirmed availability result and its package-manager target, when provided.
-#[derive(Debug, PartialEq, Eq)]
-pub(crate) struct UpdateCheck {
-    pub available: bool,
-    pub version: Option<String>,
-}
-
-/// Ask the verified owner whether it can actually upgrade this CLI. A failed
-/// read-only check is unknown, never evidence of a newer release.
-pub(crate) fn update_available(
-    plan: &UpdatePlan,
-    installed: &str,
-    path: Option<&OsStr>,
-    cancel: &dyn Fn() -> bool,
-) -> Result<Option<UpdateCheck>, ManagementError> {
-    let Some(command) = plan.command.as_ref() else {
-        return Ok(None);
-    };
-    // Query the same package/channel the verified updater will use. New catalog
-    // agents reuse this path without a command-name allowlist.
-    let package = match plan.installation.source {
-        CliSource::Npm => command
-            .arguments
-            .last()
-            .map(String::as_str)
-            .ok_or_else(|| ManagementError::Failed("Missing npm update target".into()))?,
-        CliSource::Homebrew => command
-            .arguments
-            .get(2)
-            .map(String::as_str)
-            .ok_or_else(|| ManagementError::Failed("Missing Homebrew update target".into()))?,
-        // Native installers have no shared read-only version protocol. Do not
-        // run an updater as a probe or substitute another channel's version.
-        _ => return Ok(None),
-    };
-    let args: Vec<&str> = match plan.installation.source {
-        CliSource::Npm => vec![
-            "view",
-            package,
-            "version",
-            "--json",
-            "--fetch-retries=0",
-            "--fetch-timeout=2500",
-        ],
-        CliSource::Homebrew => vec![
-            "outdated",
-            command
-                .arguments
-                .get(1)
-                .map(String::as_str)
-                .ok_or_else(|| ManagementError::Failed("Missing Homebrew package kind".into()))?,
-            "--json=v2",
-            package,
-        ],
-        _ => return Ok(None),
-    };
-    let mut probe = Command::new(&command.program);
-    probe.args(args);
-    if let Some(path) = path {
-        probe.env("PATH", path);
-    }
-    if plan.installation.source == CliSource::Homebrew {
-        probe.env("HOMEBREW_NO_AUTO_UPDATE", "1");
-    }
-    let (success, output, diagnostics) =
-        environment::run_bounded_status_separated(&mut probe, Duration::from_secs(5), cancel)
-            .map_err(|error| match error {
-                RunError::Cancelled => ManagementError::Cancelled,
-                RunError::TimedOut => ManagementError::Failed("The update check timed out".into()),
-                RunError::Start(message) => ManagementError::Failed(message),
-            })?;
-    let available = parse_update_available(&plan.installation.source, package, installed, &output);
-    // Homebrew exits nonzero when a named package is outdated; require a valid positive result.
-    if !success
-        && !(plan.installation.source == CliSource::Homebrew
-            && available.as_ref().is_some_and(|check| check.available))
-    {
-        let reason = if diagnostics.trim().is_empty() {
-            output.trim()
-        } else {
-            diagnostics.trim()
-        };
-        let reason = if reason.is_empty() {
-            "The package manager exited unsuccessfully without diagnostics."
-        } else {
-            reason
-        };
-        return Err(ManagementError::Failed(format!(
-            "Update check failed: {reason}"
-        )));
-    }
-    available.map(Some).ok_or_else(|| {
-        ManagementError::Failed("The package manager returned an invalid version response".into())
-    })
-}
-
-fn parse_update_available(
-    source: &CliSource,
-    package: &str,
-    installed: &str,
-    output: &str,
-) -> Option<UpdateCheck> {
-    match source {
-        CliSource::Npm => {
-            let value: serde_json::Value = serde_json::from_str(output.trim()).ok()?;
-            let latest = match &value {
-                serde_json::Value::String(version) => version.as_str(),
-                serde_json::Value::Array(versions) if versions.len() == 1 => {
-                    versions[0].as_str()?
-                }
-                _ => return None,
-            };
-            Some(UpdateCheck {
-                available: environment::newer_version_available(installed, latest)?,
-                version: Some(latest.to_owned()),
-            })
-        }
-        CliSource::Homebrew => {
-            let value: serde_json::Value = serde_json::from_str(output).ok()?;
-            let packages = value["casks"]
-                .as_array()?
-                .iter()
-                .chain(value["formulae"].as_array()?);
-            let mut target = None;
-            for entry in packages {
-                if entry["name"].as_str()? == package {
-                    target = Some(entry);
-                }
-            }
-            Some(UpdateCheck {
-                available: target.is_some(),
-                version: target
-                    .and_then(|entry| entry["current_version"].as_str())
-                    .filter(|v| !v.trim().is_empty())
-                    .map(str::to_owned),
-            })
-        }
-        _ => None,
-    }
-}
-
-/// Resolve actual PATH ownership on every click; GUI status is never authority to mutate.
-pub(crate) fn detect(
-    cli: &AgentCli,
-    runtime: &RuntimeEnvironment,
-    cancel: &dyn Fn() -> bool,
-) -> Result<UpdatePlan, ManagementError> {
-    if cancel() {
-        return Err(ManagementError::Cancelled);
-    }
-    let path = environment::search_path();
-    let executable = environment::find_executable(cli.command, path.as_deref());
-    // A broken symlink or non-executable command is still an existing installation.
-    let existing = executable.or_else(|| {
-        std::env::split_paths(path.as_deref().unwrap_or(OsStr::new("")))
-            .map(|directory| directory.join(cli.command))
-            .find(|candidate| std::fs::symlink_metadata(candidate).is_ok())
-    });
-    let brew = existing
-        .as_ref()
-        .and_then(|file| file.parent())
-        .and_then(|directory| std::env::join_paths([directory]).ok())
-        .and_then(|path| environment::find_executable("brew", Some(&path)))
-        .or_else(|| environment::find_executable("brew", path.as_deref()));
-    let home = std::env::var_os("HOME")
-        .or_else(|| std::env::var_os("USERPROFILE"))
-        .map(PathBuf::from);
-    resolve(
-        cli,
-        existing.as_deref(),
-        runtime.npm.as_ref().map(|tool| tool.path.as_path()),
-        brew.as_deref(),
-        home.as_deref(),
-        &|program, args| {
-            let mut command = Command::new(program);
-            command
-                .args(args)
-                .env("HOMEBREW_NO_AUTO_UPDATE", "1")
-                .env("HOMEBREW_NO_ANALYTICS", "1");
-            if let Some(path) = &path {
-                command.env("PATH", path);
-            }
-            environment::run_bounded(command, PROBE_TIMEOUT, cancel)
-        },
-    )
-}
-
-fn query(
-    probe: &dyn Fn(&Path, &[&str]) -> Result<String, RunError>,
-    program: &Path,
-    args: &[&str],
-) -> Result<Option<String>, ManagementError> {
-    match probe(program, args) {
-        Ok(output) => Ok(Some(output.trim().into())),
-        Err(RunError::Start(_)) => Ok(None),
-        Err(RunError::Cancelled) => Err(ManagementError::Cancelled),
-        Err(RunError::TimedOut) => Err(ManagementError::TimedOut),
-    }
-}
-
-/// Filesystem identity and read-only manager probes are injected for deterministic tests.
-fn resolve(
-    cli: &AgentCli,
-    executable: Option<&Path>,
-    npm: Option<&Path>,
-    brew: Option<&Path>,
-    home: Option<&Path>,
-    probe: &dyn Fn(&Path, &[&str]) -> Result<String, RunError>,
-) -> Result<UpdatePlan, ManagementError> {
-    let target = executable.and_then(|path| path.canonicalize().ok());
-    if executable.is_some() && target.is_none() {
-        return Ok(UpdatePlan::manual(CliSource::Unknown, MANUAL_HINT));
-    }
-    if let (Some(target), Some(brew)) = (&target, brew) {
-        for (root_option, kind) in [("--caskroom", "--cask"), ("--cellar", "--formula")] {
-            let Some(root) = query(probe, brew, &[root_option])?
-                .and_then(|root| Path::new(&root).canonicalize().ok())
-            else {
-                continue;
-            };
-            let Some(package) = target
-                .strip_prefix(&root)
-                .ok()
-                .and_then(|relative| relative.components().next())
-                .and_then(|component| component.as_os_str().to_str())
-            else {
-                continue;
-            };
-            if !cli.brew_packages.contains(&package) {
-                continue;
-            }
-            let installed = query(probe, brew, &["list", kind, "--versions", package])?;
-            if installed.as_deref().is_some_and(|output| {
-                output.lines().any(|line| {
-                    let mut fields = line.split_whitespace();
-                    fields.next() == Some(package) && fields.next().is_some()
-                })
-            }) {
-                return Ok(UpdatePlan::automatic(
-                    CliSource::Homebrew,
-                    format!("brew upgrade {kind} {package}"),
-                    brew,
-                    vec!["upgrade".into(), kind.into(), package.into()],
-                    false,
-                ));
-            }
-            // A manager-owned path without its receipt must never fall back to npm.
-            return Ok(UpdatePlan::manual(CliSource::Homebrew, MANUAL_HINT));
-        }
-    }
-    if let (Some(executable), Some(target), Some(home)) = (executable, &target, home) {
-        let launcher = home.join(".local/bin/claude");
-        let versions = home
-            .join(".local/share/claude/versions")
-            .canonicalize()
-            .ok();
-        if cli.command == "claude"
-            && executable == launcher
-            && std::fs::read_link(executable).is_ok()
-            && versions.is_some_and(|versions| target.parent() == Some(versions.as_path()))
-        {
-            return Ok(UpdatePlan::automatic(
-                CliSource::Native,
-                "claude update".into(),
-                executable,
-                vec!["update".into()],
-                false,
-            ));
-        }
-    }
-    let npm_owned = target.as_ref().is_some_and(|target| {
-        target.ancestors().any(|root| {
-            root.file_name().is_some_and(|name| name == "node_modules")
-                && owns_npm_bin(&root.join(cli.package), cli, target)
-        })
-    });
-    let source = if executable.is_none() {
-        CliSource::Missing
-    } else if npm_owned {
-        CliSource::Npm
-    } else {
-        CliSource::Unknown
-    };
-    if executable.is_some() && !npm_owned {
-        return Ok(UpdatePlan::manual(source, MANUAL_HINT));
-    }
-    let Some(npm) = npm else {
-        return Ok(UpdatePlan::manual(source, MANUAL_HINT));
-    };
-    let Some(prefix) = query(probe, npm, &["prefix", "--global"])? else {
-        return Ok(UpdatePlan::manual(source, MANUAL_HINT));
-    };
-    let prefix = PathBuf::from(prefix);
-    if !prefix.is_absolute() {
-        return Ok(UpdatePlan::manual(source, MANUAL_HINT));
-    }
-    let bin = if cfg!(windows) {
-        prefix.join(format!("{}.cmd", cli.command))
-    } else {
-        prefix.join("bin").join(cli.command)
-    };
-    if let Some(target) = &target {
-        let Some(root) = query(probe, npm, &["root", "--global"])? else {
-            return Ok(UpdatePlan::manual(source, MANUAL_HINT));
-        };
-        let Ok(root) = Path::new(&root).canonicalize() else {
-            return Ok(UpdatePlan::manual(source, MANUAL_HINT));
-        };
-        let package = root.join(cli.package);
-        if !package
-            .canonicalize()
-            .is_ok_and(|package| package.starts_with(&root))
-            || !owns_npm_bin(&package, cli, target)
-            || bin.canonicalize().ok().as_ref() != Some(target)
-        {
-            return Ok(UpdatePlan::manual(CliSource::Npm,
-                "Switch to the Node.js/npm environment that installed this CLI, update it there, then check again."));
-        }
-    } else if std::fs::symlink_metadata(&bin).is_ok() {
-        return Ok(UpdatePlan::manual(CliSource::Unknown, MANUAL_HINT));
-    }
-    Ok(UpdatePlan::automatic(
-        source,
-        cli.install_hint.into(),
-        npm,
-        vec![
-            "install".into(),
-            "-g".into(),
-            "--no-audit".into(),
-            "--no-fund".into(),
-            "--loglevel=error".into(),
-            format!("{}@latest", cli.package),
-        ],
-        true,
-    ))
-}
-
-fn owns_npm_bin(package: &Path, cli: &AgentCli, target: &Path) -> bool {
-    let manifest = (|| {
-        let file = std::fs::File::open(package.join("package.json")).ok()?;
-        let mut bytes = Vec::new();
-        file.take(64 * 1024).read_to_end(&mut bytes).ok()?;
-        serde_json::from_slice::<serde_json::Value>(&bytes).ok()
-    })();
-    let Some(manifest) = manifest else {
-        return false;
-    };
-    if manifest["name"] != cli.package {
-        return false;
-    }
-    let Some(bin) = manifest["bin"]
-        .get(cli.command)
-        .unwrap_or(&manifest["bin"])
-        .as_str()
-    else {
-        return false;
-    };
-    let Ok(package_root) = package.canonicalize() else {
-        return false;
-    };
-    package
-        .join(bin)
-        .canonicalize()
-        .is_ok_and(|bin| bin.starts_with(package_root) && bin == target)
-}
-
-#[cfg(all(test, unix))]
-mod tests;
-
-#[cfg(test)]
-mod update_tests {
-    use super::*;
-
-    #[test]
-    fn update_targets_are_retained_for_every_package_and_manager() {
-        for package in ["codex", "claude-code@latest", "future-agent"] {
-            let npm =
-                parse_update_available(&CliSource::Npm, package, "2.0.0", r#""3.0.0""#).unwrap();
-            assert_eq!(
-                npm,
-                UpdateCheck {
-                    available: true,
-                    version: Some("3.0.0".into())
-                }
-            );
-            let current =
-                parse_update_available(&CliSource::Npm, package, "4.0.0", r#""3.0.0""#).unwrap();
-            assert!(!current.available);
-            assert_eq!(current.version.as_deref(), Some("3.0.0"));
-            for kind in ["casks", "formulae"] {
-                let mut output = serde_json::json!({"casks": [], "formulae": []});
-                output[kind] = serde_json::json!([
-                    {"name": "unrelated", "current_version": "99.0.0"},
-                    {"name": package, "current_version": "3.0.0"}
-                ]);
-                let check = parse_update_available(
-                    &CliSource::Homebrew,
-                    package,
-                    "2.0.0",
-                    &output.to_string(),
-                )
-                .unwrap();
-                assert_eq!(
-                    check,
-                    UpdateCheck {
-                        available: true,
-                        version: Some("3.0.0".into())
-                    }
-                );
-                output[kind][1]
-                    .as_object_mut()
-                    .unwrap()
-                    .remove("current_version");
-                let unknown = parse_update_available(
-                    &CliSource::Homebrew,
-                    package,
-                    "2.0.0",
-                    &output.to_string(),
-                )
-                .unwrap();
-                assert!(unknown.available);
-                assert_eq!(unknown.version, None);
-            }
-        }
-    }
-
-    #[test]
-    fn confirmed_updates_only_when_the_owner_reports_one() {
-        for output in [r#""0.160.0""#, r#"["0.160.0"]"#] {
-            assert_eq!(
-                parse_update_available(&CliSource::Npm, "@openai/codex@latest", "0.159.3", output)
-                    .map(|check| check.available),
-                Some(true)
-            );
-        }
-        for output in ["[]", r#"["0.159.3","0.160.0"]"#, "[42]", r#"["invalid"]"#] {
-            assert_eq!(
-                parse_update_available(&CliSource::Npm, "@openai/codex@latest", "0.159.3", output)
-                    .map(|check| check.available),
-                None
-            );
-        }
-        assert_eq!(
-            parse_update_available(
-                &CliSource::Npm,
-                "@openai/codex@latest",
-                "0.159.3",
-                "\"0.159.3\""
-            )
-            .map(|check| check.available),
-            Some(false)
-        );
-        assert_eq!(
-            parse_update_available(
-                &CliSource::Npm,
-                "@openai/codex@latest",
-                "0.159.3",
-                "\"0.160.0\""
-            )
-            .map(|check| check.available),
-            Some(true)
-        );
-        assert_eq!(
-            parse_update_available(
-                &CliSource::Npm,
-                "@openai/codex@latest",
-                "0.159.3-beta.1",
-                "\"0.159.3\""
-            )
-            .map(|check| check.available),
-            Some(true)
-        );
-        assert_eq!(
-            parse_update_available(
-                &CliSource::Npm,
-                "@openai/codex@latest",
-                "0.159.3",
-                "network error"
-            )
-            .map(|check| check.available),
-            None
-        );
-        assert_eq!(
-            parse_update_available(&CliSource::Npm, "@openai/codex@latest", "0.159.3", "\"\"")
-                .map(|check| check.available),
-            None
-        );
-        assert_eq!(
-            parse_update_available(
-                &CliSource::Homebrew,
-                "codex",
-                "0.159.3",
-                r#"{"casks":[],"formulae":[]}"#
-            )
-            .map(|check| check.available),
-            Some(false)
-        );
-        assert_eq!(
-            parse_update_available(
-                &CliSource::Homebrew,
-                "codex",
-                "0.159.3",
-                r#"{"casks":[{"name":"codex"}],"formulae":[]}"#
-            )
-            .map(|check| check.available),
-            Some(true)
-        );
-        assert_eq!(
-            parse_update_available(
-                &CliSource::Homebrew,
-                "codex",
-                "0.159.3",
-                r#"{"casks":[],"formulae":[{"name":"codex"}]}"#
-            )
-            .map(|check| check.available),
-            Some(true)
-        );
-        assert_eq!(
-            parse_update_available(&CliSource::Homebrew, "codex", "0.159.3", "error")
-                .map(|check| check.available),
-            None
-        );
-    }
-}
diff --git a/rust/lithe-agent-host/src/cli_update/tests.rs b/rust/lithe-agent-host/src/cli_update/tests.rs
deleted file mode 100644
index b525d56d..00000000
--- a/rust/lithe-agent-host/src/cli_update/tests.rs
+++ /dev/null
@@ -1,523 +0,0 @@
-use super::*;
-use std::os::unix::fs::{symlink, PermissionsExt};
-
-struct Fixture(PathBuf);
-impl Fixture {
-    fn new() -> Self {
-        let root = std::env::temp_dir().join(format!("lithe-cli-owner-{}", uuid::Uuid::new_v4()));
-        std::fs::create_dir_all(&root).unwrap();
-        Self(root)
-    }
-    fn file(&self, relative: &str, contents: &str) -> PathBuf {
-        let path = self.0.join(relative);
-        std::fs::create_dir_all(path.parent().unwrap()).unwrap();
-        std::fs::write(&path, contents).unwrap();
-        std::fs::set_permissions(&path, std::fs::Permissions::from_mode(0o755)).unwrap();
-        path
-    }
-    fn link(&self, relative: &str, target: &Path) -> PathBuf {
-        let path = self.0.join(relative);
-        std::fs::create_dir_all(path.parent().unwrap()).unwrap();
-        symlink(target, &path).unwrap();
-        path
-    }
-    fn npm_cli(&self) -> PathBuf {
-        let target = self.file(
-            "npm space/node_modules/@openai/codex/bin/codex.js",
-            "#!/bin/sh\n",
-        );
-        self.file(
-            "npm space/node_modules/@openai/codex/package.json",
-            r#"{"name":"@openai/codex","bin":{"codex":"bin/codex.js"}}"#,
-        );
-        self.link("npm space/bin/codex", &target)
-    }
-    fn npm_probe(&self, _: &Path, args: &[&str]) -> Result<String, RunError> {
-        match args {
-            ["prefix", "--global"] => Ok(self.0.join("npm space").display().to_string()),
-            ["root", "--global"] => Ok(self.0.join("npm space/node_modules").display().to_string()),
-            _ => panic!("unexpected probe: {args:?}"),
-        }
-    }
-}
-impl Drop for Fixture {
-    fn drop(&mut self) {
-        let _ = std::fs::remove_dir_all(&self.0);
-    }
-}
-fn codex() -> &'static AgentCli {
-    crate::catalog::find("codex-acp")
-        .unwrap()
-        .cli
-        .as_ref()
-        .unwrap()
-}
-fn claude() -> &'static AgentCli {
-    crate::catalog::find("claude-acp")
-        .unwrap()
-        .cli
-        .as_ref()
-        .unwrap()
-}
-
-#[test]
-fn update_probe_accepts_homebrew_outdated_exit_but_not_other_failures() {
-    let fixture = Fixture::new();
-    for (source, output, exit, expected) in [
-        (
-            CliSource::Homebrew,
-            r#"{"casks":[{"name":"codex"}],"formulae":[]}"#,
-            1,
-            Some(true),
-        ),
-        (
-            CliSource::Homebrew,
-            r#"{"casks":[],"formulae":[]}"#,
-            0,
-            Some(false),
-        ),
-        (
-            CliSource::Homebrew,
-            r#"{"casks":[],"formulae":[]}"#,
-            1,
-            None,
-        ),
-        (CliSource::Homebrew, "unavailable", 1, None),
-        (CliSource::Npm, r#""0.160.0""#, 1, None),
-        (CliSource::Npm, r#""0.160.0""#, 0, Some(true)),
-        (CliSource::Npm, r#"["0.160.0"]"#, 0, Some(true)),
-    ] {
-        let executable = fixture.file(
-            "manager",
-            &format!("#!/bin/sh\nprintf '%s\\n' 'nonfatal warning' >&2\nprintf '%s\\n' '{output}'\nexit {exit}\n"),
-        );
-        let plan = UpdatePlan::automatic(
-            source,
-            String::new(),
-            &executable,
-            vec!["upgrade".into(), "--cask".into(), "codex".into()],
-            false,
-        );
-        assert_eq!(
-            update_available(&plan, "0.159.3", None, &|| false)
-                .ok()
-                .flatten()
-                .map(|check| check.available),
-            expected
-        );
-        assert_eq!(
-            update_available(&plan, "0.159.3", None, &|| true)
-                .ok()
-                .flatten()
-                .map(|check| check.available),
-            None
-        );
-    }
-}
-
-#[test]
-fn failed_update_probe_preserves_diagnostics_and_never_confirms_an_update() {
-    let fixture = Fixture::new();
-    for (output, diagnostics, exit, expected) in [
-        ("Registry unavailable", "", 1, "Registry unavailable"),
-        ("", "", 1, "without diagnostics"),
-        (
-            "",
-            "Network connection refused",
-            1,
-            "Network connection refused",
-        ),
-        ("invalid-json", "", 0, "invalid version response"),
-        ("\"3.0.0\"", "Permission denied", 1, "Permission denied"),
-    ] {
-        let executable = fixture.file(
-            "manager",
-            &format!(
-                "#!/bin/sh\nprintf '%s' '{output}'\nprintf '%s' '{diagnostics}' >&2\nexit {exit}\n"
-            ),
-        );
-        let plan = UpdatePlan::automatic(
-            CliSource::Npm,
-            String::new(),
-            &executable,
-            vec!["install".into(), "@example/future@latest".into()],
-            false,
-        );
-        let error = update_available(&plan, "2.0.0", None, &|| false).unwrap_err();
-        assert!(error.message().contains(expected), "{}", error.message());
-        assert_eq!(
-            update_available(&plan, "2.0.0", None, &|| true),
-            Err(ManagementError::Cancelled)
-        );
-    }
-    let plan = UpdatePlan::manual(CliSource::Native, MANUAL_HINT);
-    assert_eq!(update_available(&plan, "2.0.0", None, &|| false), Ok(None));
-}
-
-#[test]
-fn update_probe_uses_the_same_latest_tag_as_the_updater() {
-    let fixture = Fixture::new();
-    let executable = fixture.npm_cli();
-    // Model an npm configuration whose default tag is beta. An unqualified
-    // query returns a prerelease even though latest has a stable update.
-    let npm = fixture.file(
-        "npm space/bin/npm",
-        r#"#!/bin/sh
-case "$1:$2" in
-  view:@openai/codex@latest) printf '"0.160.0"\n' ;;
-  view:@openai/codex) printf '"0.161.0-beta.1"\n' ;;
-  *) exit 2 ;;
-esac
-"#,
-    );
-    let plan = resolve(
-        codex(),
-        Some(&executable),
-        Some(&npm),
-        None,
-        None,
-        &|program, args| fixture.npm_probe(program, args),
-    )
-    .unwrap();
-    assert!(plan
-        .command
-        .as_ref()
-        .unwrap()
-        .arguments
-        .contains(&"@openai/codex@latest".to_string()));
-    assert_eq!(
-        update_available(&plan, "0.159.3", None, &|| false)
-            .ok()
-            .flatten()
-            .map(|check| check.available),
-        Some(true)
-    );
-    assert_eq!(
-        update_available(&plan, "0.160.0", None, &|| false)
-            .ok()
-            .flatten()
-            .map(|check| check.available),
-        Some(false)
-    );
-}
-
-#[test]
-fn every_catalog_package_uses_its_verified_update_target() {
-    let fixture = Fixture::new();
-    let future = AgentCli {
-        command: "future-agent",
-        name: "Future Agent",
-        minimum_version: "1.0.0",
-        path_env: "FUTURE_AGENT_PATH",
-        accepts_windows_shim: false,
-        install_hint: "npm install -g @example/agent",
-        package: "@example/agent",
-        brew_packages: &["future-agent"],
-    };
-    for cli in [codex(), claude(), &future] {
-        for source in [CliSource::Npm, CliSource::Homebrew] {
-            let packages = if source == CliSource::Npm {
-                vec![format!("{}@latest", cli.package)]
-            } else {
-                cli.brew_packages
-                    .iter()
-                    .map(|package| (*package).to_owned())
-                    .collect()
-            };
-            for package in packages {
-                let (arguments, expected_args, output) = if source == CliSource::Npm {
-                    (
-                        vec!["install".into(), "-g".into(), package.clone()],
-                        format!(
-                            "view {package} version --json --fetch-retries=0 --fetch-timeout=2500"
-                        ),
-                        r#""3.0.0""#.to_owned(),
-                    )
-                } else {
-                    (
-                        vec!["upgrade".into(), "--cask".into(), package.clone()],
-                        format!("outdated --cask --json=v2 {package}"),
-                        format!(r#"{{"casks":[{{"name":"{package}"}}],"formulae":[]}}"#),
-                    )
-                };
-                let executable = fixture.file(
-                    "manager",
-                    &format!(
-                    "#!/bin/sh\n[ \"$*\" = '{expected_args}' ] || exit 2\nprintf '%s' '{output}'\n"
-                ),
-                );
-                let plan = UpdatePlan::automatic(
-                    source.clone(),
-                    String::new(),
-                    &executable,
-                    arguments,
-                    false,
-                );
-                assert_eq!(
-                    update_available(&plan, "2.0.0", None, &|| false)
-                        .ok()
-                        .flatten()
-                        .map(|check| check.available),
-                    Some(true),
-                    "{} {package}",
-                    cli.command
-                );
-                if source == CliSource::Npm {
-                    for installed in ["3.0.0", "4.0.0"] {
-                        assert_eq!(
-                            update_available(&plan, installed, None, &|| false)
-                                .ok()
-                                .flatten()
-                                .map(|check| check.available),
-                            Some(false),
-                            "{} {package}",
-                            cli.command
-                        );
-                    }
-                }
-                assert_eq!(
-                    parse_update_available(
-                        &CliSource::Homebrew,
-                        &package,
-                        "2.0.0",
-                        r#"{"casks":[{"name":"unrelated"}],"formulae":[]}"#
-                    )
-                    .map(|check| check.available),
-                    Some(false)
-                );
-            }
-        }
-    }
-    // Even an updatable native installation must not execute its updater while
-    // checking status. Unknown is distinct from both current and outdated.
-    let marker = fixture.0.join("native-was-run");
-    let executable = fixture.file(
-        "native",
-        &format!("#!/bin/sh\nprintf mutated > '{}'\n", marker.display()),
-    );
-    let plan = UpdatePlan::automatic(
-        CliSource::Native,
-        String::new(),
-        &executable,
-        vec!["update".into()],
-        false,
-    );
-    assert_eq!(
-        update_available(&plan, "2.0.0", None, &|| false)
-            .ok()
-            .flatten()
-            .map(|check| check.available),
-        None
-    );
-    assert!(
-        !marker.exists(),
-        "checking status must never execute the native updater"
-    );
-}
-
-#[test]
-fn homebrew_receipt_and_actual_target_win_over_an_unrelated_npm_install() {
-    // Preserve cask/formula ownership and Claude's chosen release channel.
-    for (kind, directory, package, cli) in [
-        ("--cask", "Caskroom", "codex", codex()),
-        ("--formula", "Cellar", "codex", codex()),
-        ("--cask", "Caskroom", "claude-code@latest", claude()),
-    ] {
-        let fixture = Fixture::new();
-        let npm = fixture.file("npm space/bin/npm", "#!/bin/sh\n");
-        fixture.npm_cli();
-        let brew = fixture.file("brew prefix/bin/brew", "#!/bin/sh\n");
-        let target = fixture.file(
-            &format!("brew prefix/{directory}/{package}/1/cli"),
-            "#!/bin/sh\n",
-        );
-        let executable = fixture.link(&format!("brew prefix/bin/{}", cli.command), &target);
-        std::fs::create_dir_all(fixture.0.join("brew prefix/Cellar")).unwrap();
-        std::fs::create_dir_all(fixture.0.join("brew prefix/Caskroom")).unwrap();
-        let plan = resolve(
-            cli,
-            Some(&executable),
-            Some(&npm),
-            Some(&brew),
-            None,
-            &|program, args| {
-                assert_eq!(
-                    program, brew,
-                    "npm must not be consulted for a verified Homebrew CLI"
-                );
-                match args {
-                    ["--caskroom"] => {
-                        Ok(fixture.0.join("brew prefix/Caskroom").display().to_string())
-                    }
-                    ["--cellar"] => Ok(fixture.0.join("brew prefix/Cellar").display().to_string()),
-                    ["list", flag, "--versions", name] if *flag == kind && *name == package => {
-                        Ok(format!("{package} 1"))
-                    }
-                    _ => panic!("unexpected probe: {args:?}"),
-                }
-            },
-        )
-        .unwrap();
-        assert_eq!(plan.installation.source, CliSource::Homebrew);
-        assert!(plan.installation.can_update);
-        let command = plan.command.unwrap();
-        assert_eq!(command.program, brew);
-        assert_eq!(command.arguments, ["upgrade", kind, package]);
-        assert!(!command.observes_npm);
-    }
-}
-
-#[test]
-fn npm_requires_its_global_package_manifest_bin_and_active_link_to_agree() {
-    let fixture = Fixture::new();
-    let executable = fixture.npm_cli();
-    let npm = fixture.file("npm space/bin/npm", "#!/bin/sh\n");
-    let plan = resolve(
-        codex(),
-        Some(&executable),
-        Some(&npm),
-        None,
-        None,
-        &|program, args| fixture.npm_probe(program, args),
-    )
-    .unwrap();
-    assert_eq!(plan.installation.source, CliSource::Npm);
-    assert!(plan.installation.can_update);
-    assert_eq!(plan.command.unwrap().program, npm);
-
-    fixture.file(
-        "npm space/node_modules/@openai/codex/package.json",
-        r#"{"name":"different-package","bin":{"codex":"bin/codex.js"}}"#,
-    );
-    let plan = resolve(
-        codex(),
-        Some(&executable),
-        Some(&npm),
-        None,
-        None,
-        &|_, _| panic!("unverified packages must not be updated"),
-    )
-    .unwrap();
-    assert_eq!(plan.installation.source, CliSource::Unknown);
-    assert!(plan.command.is_none());
-}
-
-#[test]
-fn another_node_environment_cannot_update_the_active_npm_install() {
-    let fixture = Fixture::new();
-    let executable = fixture.npm_cli();
-    let npm = fixture.file("other-node/bin/npm", "#!/bin/sh\n");
-    std::fs::create_dir_all(fixture.0.join("other-node/node_modules")).unwrap();
-    let plan = resolve(
-        codex(),
-        Some(&executable),
-        Some(&npm),
-        None,
-        None,
-        &|_, args| {
-            Ok(fixture
-                .0
-                .join(if args[0] == "prefix" {
-                    "other-node"
-                } else {
-                    "other-node/node_modules"
-                })
-                .display()
-                .to_string())
-        },
-    )
-    .unwrap();
-    assert_eq!(plan.installation.source, CliSource::Npm);
-    assert!(!plan.installation.can_update);
-    assert!(plan.command.is_none());
-    assert!(plan
-        .installation
-        .update_hint
-        .contains("Node.js/npm environment"));
-}
-
-#[test]
-fn native_claude_launcher_uses_self_update_without_requiring_npm() {
-    let fixture = Fixture::new();
-    let target = fixture.file("home/.local/share/claude/versions/2.1.280", "#!/bin/sh\n");
-    let executable = fixture.link("home/.local/bin/claude", &target);
-    let plan = resolve(
-        claude(),
-        Some(&executable),
-        None,
-        None,
-        Some(&fixture.0.join("home")),
-        &|_, _| panic!("native installation does not need package manager probes"),
-    )
-    .unwrap();
-    assert_eq!(plan.installation.source, CliSource::Native);
-    let command = plan.command.unwrap();
-    assert_eq!(command.program, executable);
-    assert_eq!(command.arguments, ["update"]);
-}
-
-#[test]
-fn missing_cli_can_use_npm_but_existing_or_broken_commands_are_never_overwritten() {
-    let fixture = Fixture::new();
-    let npm = fixture.file("npm space/bin/npm", "#!/bin/sh\n");
-    let plan = resolve(codex(), None, Some(&npm), None, None, &|p, a| {
-        fixture.npm_probe(p, a)
-    })
-    .unwrap();
-    assert_eq!(plan.installation.source, CliSource::Missing);
-    assert!(plan.installation.can_update);
-
-    let broken = fixture.link("npm space/bin/codex", &fixture.0.join("missing-target"));
-    for executable in [None, Some(broken.as_path())] {
-        let plan = resolve(codex(), executable, Some(&npm), None, None, &|p, a| {
-            fixture.npm_probe(p, a)
-        })
-        .unwrap();
-        assert!(!plan.installation.can_update);
-        assert!(plan.command.is_none());
-    }
-    let manual = fixture.file("manual/codex", "#!/bin/sh\n");
-    let plan = resolve(codex(), Some(&manual), Some(&npm), None, None, &|_, _| {
-        panic!("do not probe/update unknown owners")
-    })
-    .unwrap();
-    assert_eq!(plan.installation.source, CliSource::Unknown);
-    assert!(plan.command.is_none());
-}
-
-#[test]
-fn unrecorded_homebrew_target_cannot_fall_back_to_npm_and_cancel_is_preserved() {
-    let fixture = Fixture::new();
-    let target = fixture.file("Caskroom/codex/1/cli", "#!/bin/sh\n");
-    let brew = fixture.file("bin/brew", "#!/bin/sh\n");
-    let plan = resolve(
-        codex(),
-        Some(&target),
-        Some(Path::new("unused-npm")),
-        Some(&brew),
-        None,
-        &|_, args| {
-            if args[0] == "--caskroom" {
-                Ok(fixture.0.join("Caskroom").display().to_string())
-            } else {
-                Err(RunError::Start("no installed receipt".into()))
-            }
-        },
-    )
-    .unwrap();
-    assert_eq!(plan.installation.source, CliSource::Homebrew);
-    assert!(plan.command.is_none());
-    for (failure, expected) in [
-        (RunError::Cancelled, ManagementError::Cancelled),
-        (RunError::TimedOut, ManagementError::TimedOut),
-    ] {
-        let result = resolve(codex(), Some(&target), None, Some(&brew), None, &|_, _| {
-            Err(if failure == RunError::Cancelled {
-                RunError::Cancelled
-            } else {
-                RunError::TimedOut
-            })
-        });
-        assert_eq!(result.unwrap_err(), expected);
-    }
-}
diff --git a/rust/lithe-agent-host/src/codex-config-relay.cjs b/rust/lithe-agent-host/src/codex-config-relay.cjs
deleted file mode 100755
index 499ee2ac..00000000
--- a/rust/lithe-agent-host/src/codex-config-relay.cjs
+++ /dev/null
@@ -1,260 +0,0 @@
-#!/usr/bin/env node
-'use strict';
-
-// Preserve the complete native App Server. The ACP adapter replaces its
-// custom provider table, so apply public retry options at thread creation.
-const { spawn } = require('node:child_process');
-const { Transform } = require('node:stream');
-const { StringDecoder } = require('node:string_decoder');
-const { request: httpRequest } = require('node:http');
-const executable = process.env.LITHE_CODEX_EXECUTABLE;
-const retries = Number(process.env.LITHE_CODEX_STREAM_RETRIES);
-const nativeRecovery = process.env.LITHE_CODEX_NATIVE_RECOVERY !== '0';
-const contextURL = process.env.LITHE_CODEX_CONTEXT_URL;
-const observationBase = process.env.LITHE_CODEX_OBSERVATION_BASE;
-if (!executable || !Number.isInteger(retries) || retries < 0 || retries > 100 || process.argv.slice(2).join(' ') !== 'app-server') {
-  process.stderr.write('Codex retry configuration is unavailable.\n');
-  process.exit(1);
-}
-const env = { ...process.env };
-delete env.LITHE_CODEX_EXECUTABLE;
-delete env.LITHE_CODEX_STREAM_RETRIES;
-delete env.LITHE_CODEX_NATIVE_RECOVERY;
-delete env.LITHE_CODEX_CONTEXT_URL;
-delete env.LITHE_CODEX_OBSERVATION_BASE;
-env.CODEX_PATH = executable;
-const options = { env, stdio: ['pipe', 'pipe', 'inherit'] };
-// Codex 0.166 rechecks the process provider before accepting each turn. ACP's
-// per-thread route alone no longer suffices. These process-local, non-secret
-// defaults match the explicit authentication mode; ACP still supplies the
-// complete gateway definition over stdio for every new/resumed/forked thread.
-// Codex's CLI accepts bare string override values. Fixed, space-free values
-// also avoid adding a second layer of TOML quoting through Windows npm shims.
-const nativeArguments = ['-c', `model_provider=${nativeRecovery ? 'custom-gateway' : 'openai'}`];
-if (nativeRecovery) nativeArguments.push('-c', 'model_providers.custom-gateway.name=ACP-gateway', '-c', 'model_providers.custom-gateway.wire_api=responses');
-nativeArguments.push('app-server');
-// Match upstream's Windows launcher support, including npm's codex.cmd.
-// Only fixed arguments are appended, never gateway URLs, headers or credentials.
-const native = process.platform === 'win32'
-  ? spawn(`"${executable}" ${nativeArguments.join(' ')}`, { ...options, shell: true })
-  : spawn(executable, nativeArguments, options);
-const turns = new Map();
-let sequence = 0;
-const pendingResumes = new Map();
-const contextCaptures = new Map();
-const MAX_CAPTURES = 32;
-const pendingAccounts = new Map();
-let unrestrictedAccount = false;
-let observedThread = false;
-
-// A custom inference origin is independent in native Codex's routing owner.
-// Allow it only after native discovery confirms the ordinary unrestricted
-// backend. Managed/resident/unknown accounts keep their original native route.
-function configureObservation(message) {
-  if (!observationBase) return;
-  if (message.method === 'account/read') {
-    unrestrictedAccount = false;
-    pendingAccounts.clear();
-    boundedSet(pendingAccounts, message.id, true);
-  }
-  if (!['thread/start', 'thread/resume', 'thread/fork'].includes(message.method)) return;
-  const config = message.params?.config;
-  if (!config || config.openai_base_url !== observationBase) return;
-  if (!unrestrictedAccount) config.openai_base_url = '';
-  else observedThread = true;
-}
-
-function observeAccount(message) {
-  if (!observationBase) return;
-  if (message.method === 'account/updated' || message.method === 'account/login/completed') {
-    unrestrictedAccount = false;
-    // Discovery begun before an identity/workspace change cannot authorize
-    // the new route, even when the native account keeps the same email.
-    pendingAccounts.clear();
-    if (observedThread) native.kill();
-  }
-  if (!pendingAccounts.has(message.id)) return;
-  pendingAccounts.delete(message.id);
-  const result = message.result;
-  unrestrictedAccount = !message.error && result?.account?.type === 'chatgpt'
-    && result.workspaceRouting?.backendOrigin === 'https://chatgpt.com'
-    && result.workspaceRouting?.accountRoutingOverride === 'NO_CONSTRAINT';
-  if (!unrestrictedAccount && observedThread) native.kill();
-}
-
-// The Host arms a random ticket before its ACP load. This channel carries only
-// actual native counters, never transcript content, provider URLs or secrets.
-function contextExchange(action, payload) {
-  if (!contextURL) return Promise.resolve(null);
-  return new Promise(resolve => {
-    try {
-      // node:http connects directly to this launch's loopback listener; user
-      // HTTP proxy settings and redirects must never route the capability out.
-      const request = httpRequest(`${contextURL}/${action}`, { method: 'POST', agent: false, timeout: 1000 }, response => {
-        let body = '';
-        response.on('data', chunk => {
-          body += chunk.toString();
-          if (body.length > 4096) { response.destroy(); resolve(null); }
-        });
-        response.on('error', () => resolve(null));
-        response.on('end', () => {
-          try { resolve(response.statusCode === 200 ? JSON.parse(body) : null); }
-          catch { resolve(null); }
-        });
-      });
-      request.on('timeout', () => { request.destroy(); resolve(null); });
-      request.on('error', () => resolve(null));
-      request.end(JSON.stringify(payload));
-    } catch { resolve(null); } // Optional observation cannot break native transport.
-  });
-}
-
-function boundedSet(map, key, value) {
-  map.delete(key);
-  if (map.size >= MAX_CAPTURES) map.delete(map.keys().next().value);
-  map.set(key, value);
-}
-
-function prepareContext(message) {
-  if (message.method !== 'thread/resume' || !contextURL || typeof message.params?.threadId !== 'string') return message;
-  return contextExchange('capture', { sessionId: message.params.threadId }).then(capture => {
-    if (typeof capture?.ticket !== 'string' || capture.ticket.length > 64) return message;
-    const item = { sessionId: message.params.threadId, ticket: capture.ticket };
-    // Codex deliberately skips token-usage replay on the cheap excludeTurns
-    // path for legacy histories. Reuse its full native restore to obtain it.
-    message.params.excludeTurns = false;
-    boundedSet(pendingResumes, message.id, item);
-    contextCaptures.delete(item.sessionId);
-    return message;
-  });
-}
-
-function observeContext(message) {
-  const pending = pendingResumes.get(message.id);
-  if (pending) {
-    pendingResumes.delete(message.id);
-    if (!message.error && message.result?.thread?.id === pending.sessionId) {
-      boundedSet(contextCaptures, pending.sessionId, pending);
-    }
-  }
-  if (message.method === 'turn/started') contextCaptures.delete(message.params?.threadId);
-  if (message.method !== 'thread/tokenUsage/updated') return message;
-  const capture = contextCaptures.get(message.params?.threadId);
-  const usage = message.params?.tokenUsage;
-  const used = usage?.last?.totalTokens, size = usage?.modelContextWindow;
-  if (capture && Number.isSafeInteger(used) && used >= 0 && Number.isSafeInteger(size) && size > 0) {
-    contextCaptures.delete(capture.sessionId);
-    void contextExchange('report', { ...capture, used, size });
-  }
-  return message;
-}
-
-function configure(message) {
-  configureObservation(message);
-  if (!nativeRecovery) return prepareContext(message);
-  if (!['thread/start', 'thread/resume', 'thread/fork'].includes(message.method)) return message;
-  const provider = message.params?.config?.model_providers?.['custom-gateway'];
-  if (!provider || typeof provider !== 'object' || Array.isArray(provider)) return prepareContext(message);
-  provider.request_max_retries = 0;
-  provider.stream_max_retries = retries;
-  // Remove competing dotted overrides before the native unordered override
-  // map is applied. The selected gateway table owns this route and budget.
-  for (const key of Object.keys(message.params.config)) {
-    if (key === 'model_providers.custom-gateway' || key.startsWith('model_providers.custom-gateway.') || key === 'features.unbounded_connection_retries') delete message.params.config[key];
-  }
-  const features = message.params.config.features ??= {};
-  features.unbounded_connection_retries = false;
-  return prepareContext(message);
-}
-
-function preserveFailure(message) {
-  observeAccount(message);
-  observeContext(message);
-  if (!nativeRecovery) return message;
-  if (message.method === 'turn/started') turns.set(message.params.threadId, message.params.turn.id);
-  if (message.method === 'turn/completed' && turns.get(message.params.threadId) === message.params.turn.id) turns.delete(message.params.threadId);
-  if (message.method !== 'error' || !message.params?.error) return message;
-  // AIR keeps a retry warning's message but drops codexErrorInfo and details.
-  // Carry the original structured native failure through that string field;
-  // only the Lithe host decodes this envelope, never assistant/model text.
-  const error = message.params.error;
-  error.message = JSON.stringify({ litheCodexFailure: {
-    message: String(error.additionalDetails || error.message).slice(0, 4096),
-    codexErrorInfo: error.codexErrorInfo ?? null,
-    turnId: message.params.turnId,
-    willRetry: message.params.willRetry,
-    activeTurn: turns.get(message.params.threadId) === message.params.turnId,
-    sequence: ++sequence,
-  } });
-  // Adapter 2.x answers a 401 with an authentication-required prompt error and
-  // publishes no failure update, so the host would never learn the failure is
-  // permanent and would wait out Codex's own Retry-After. The envelope above
-  // already carries the real category; hide it from the adapter so it reports a
-  // typed failure the way 1.x did.
-  if (unauthorized(error.codexErrorInfo)) error.codexErrorInfo = 'other';
-  return message;
-}
-
-function unauthorized(info) {
-  if (info === 'unauthorized') return true;
-  if (!info || typeof info !== 'object') return false;
-  const details = Object.values(info)[0];
-  return !!details && typeof details === 'object' && details.httpStatusCode === 401;
-}
-
-function jsonLines(map) {
-  let pending = '';
-  const decoder = new StringDecoder('utf8');
-  return new Transform({
-    transform(chunk, encoding, done) {
-      pending += decoder.write(chunk);
-      if (pending.length > 128 * 1024 * 1024) return done(new Error('Codex protocol message is too large'));
-      const drain = () => { try {
-        let end;
-        while ((end = pending.indexOf('\n')) >= 0) {
-          const line = pending.slice(0, end);
-          pending = pending.slice(end + 1);
-          if (!line.trim()) { this.push('\n'); continue; }
-          const mapped = map(JSON.parse(line));
-          if (mapped && typeof mapped.then === 'function') {
-            mapped.then(value => { this.push(JSON.stringify(value) + '\n'); drain(); }, () => done(new Error('Codex protocol mapping failed')));
-            return;
-          }
-          this.push(JSON.stringify(mapped) + '\n');
-        }
-        done();
-      } catch { done(new Error('Codex sent an invalid protocol message')); } };
-      drain();
-    },
-    flush(done) {
-      pending += decoder.end();
-      if (pending.trim()) done(new Error('Codex sent an incomplete protocol message'));
-      else done();
-    },
-  });
-}
-const input = jsonLines(configure);
-const output = jsonLines(preserveFailure);
-let stopped = false;
-let transportFailed = false;
-function stop() {
-  if (stopped) return;
-  stopped = true;
-  input.destroy(); output.destroy(); native.stdin.destroy();
-  native.kill();
-  // The owning Rust host also terminates the complete process tree.
-  const deadline = setTimeout(() => native.kill('SIGKILL'), 1000);
-  deadline.unref();
-}
-for (const stream of [input, output, native.stdin, native.stdout, process.stdin, process.stdout]) stream.on('error', () => {
-  transportFailed = true;
-  process.exitCode = 1;
-  process.stderr.write('Codex protocol transport failed.\n');
-  stop();
-});
-native.on('error', () => { process.stderr.write('Could not start Codex.\n'); process.exitCode = 1; stop(); });
-native.on('close', code => { process.exitCode = transportFailed ? 1 : code ?? 1; process.stdin.destroy(); input.destroy(); output.destroy(); });
-process.on('SIGTERM', stop); process.on('SIGINT', stop);
-process.stdin.on('end', stop);
-process.stdin.pipe(input).pipe(native.stdin);
-native.stdout.pipe(output).pipe(process.stdout);
diff --git a/rust/lithe-agent-host/src/codex_context.rs b/rust/lithe-agent-host/src/codex_context.rs
deleted file mode 100644
index 32e333ff..00000000
--- a/rust/lithe-agent-host/src/codex_context.rs
+++ /dev/null
@@ -1,237 +0,0 @@
-//! Restore actual Codex context reports through the existing native connection.
-//!
-//! The pinned ACP adapter omits usage during history loading. Its per-launch
-//! native relay asks this loopback bridge for a load ticket and returns the
-//! official App Server replay. Only the matching load may consume that report.
-//! No transcript files, credentials, model calls, or installed packages are used.
-//! Decision: .agents/notes/implemented/architecture/2026-09-25-shared-acp-agent-conversation.md
-
-use std::collections::HashMap;
-use std::convert::Infallible;
-use std::sync::{Arc, Mutex};
-use std::time::Duration;
-
-use bytes::Bytes;
-use http_body_util::{BodyExt, Full, Limited};
-use hyper::{body::Incoming, Method, Request, Response, StatusCode};
-use serde::Deserialize;
-use serde_json::{json, Value};
-use tokio::sync::oneshot;
-
-const REPORT_WAIT: Duration = Duration::from_millis(500);
-const REQUEST_TIMEOUT: Duration = Duration::from_secs(2);
-const MAX_BODY: usize = 4096;
-const MAX_LOADS: usize = 32;
-
-/// One load owns one sender, so cancelled/replaced loads cannot publish later.
-struct PendingLoad {
-    ticket: String,
-    report: Option<oneshot::Sender<Value>>,
-    upstream_reported: bool,
-}
-
-/// Connection-local tickets; never persisted or shared between Agent processes.
-type Loads = Arc<Mutex<HashMap<String, PendingLoad>>>;
-
-/// Owns the listener and every accepted HTTP connection until the Agent stops.
-pub(crate) struct Recovery {
-    url: String,
-    loads: Loads,
-    server: tokio::task::JoinHandle<()>,
-}
-
-impl Drop for Recovery {
-    fn drop(&mut self) {
-        self.server.abort();
-    }
-}
-
-impl Recovery {
-    /// Optional compatibility bridge. Failure leaves standard ACP loading intact.
-    pub(crate) async fn start() -> std::io::Result<Self> {
-        let listener = tokio::net::TcpListener::bind((std::net::Ipv4Addr::LOCALHOST, 0)).await?;
-        let path = format!("/{}", uuid::Uuid::new_v4());
-        let url = format!("http://{}{path}", listener.local_addr()?);
-        let loads = Loads::default();
-        let server_loads = loads.clone();
-        let server = tokio::spawn(async move {
-            let mut connections = tokio::task::JoinSet::new();
-            loop {
-                tokio::select! {
-                    accepted = listener.accept() => {
-                        let Ok((stream, _)) = accepted else { break };
-                        if connections.len() >= MAX_LOADS { continue; }
-                        let (loads, path) = (server_loads.clone(), path.clone());
-                        connections.spawn(async move {
-                            let service = hyper::service::service_fn(move |request| handle(request, loads.clone(), path.clone()));
-                            let connection = hyper::server::conn::http1::Builder::new()
-                                .keep_alive(false)
-                                .serve_connection(hyper_util::rt::TokioIo::new(stream), service);
-                            // log-exempt: 预期的缺失：客户端未在连接期限内完成请求，超时关闭该连接，没有遗留进程或服务。
-                            if let Ok(result) = tokio::time::timeout(REQUEST_TIMEOUT, connection).await {
-                                crate::failure_log::connection("agent.host.operation_failed", "history_connection", result);
-                            }
-                        });
-                    }
-                    _ = connections.join_next(), if !connections.is_empty() => {}
-                }
-            }
-            // JoinSet drops and aborts all in-flight clients when this owner stops.
-        });
-        Ok(Self { url, loads, server })
-    }
-
-    pub(crate) fn url(&self) -> &str {
-        &self.url
-    }
-
-    pub(crate) fn capture(&self, session: &str) -> Option<Capture> {
-        capture(&self.loads, session)
-    }
-
-    /// Standard ACP is authoritative, including an explicitly invalid report.
-    pub(crate) fn prefer_upstream_report(&self, session: &str) {
-        if let Ok(mut loads) = self.loads.lock() {
-            if let Some(load) = loads.get_mut(session) {
-                load.upstream_reported = true;
-                load.report = None;
-            }
-        }
-    }
-}
-
-/// RAII ticket for one ACP load. Its result is historical, not a new live report.
-pub(crate) struct Capture {
-    session: String,
-    ticket: String,
-    loads: Loads,
-    report: Option<oneshot::Receiver<Value>>,
-}
-
-impl Capture {
-    pub(crate) async fn finish(mut self) -> Option<Value> {
-        let report = tokio::time::timeout(REPORT_WAIT, self.report.take()?)
-            .await
-            .ok()?
-            .ok()?;
-        let current = self
-            .loads
-            .lock()
-            .ok()?
-            .get(&self.session)
-            .is_some_and(|load| load.ticket == self.ticket && !load.upstream_reported);
-        current.then_some(report)
-    }
-}
-
-impl Drop for Capture {
-    fn drop(&mut self) {
-        if let Ok(mut loads) = self.loads.lock() {
-            if loads
-                .get(&self.session)
-                .is_some_and(|load| load.ticket == self.ticket)
-            {
-                loads.remove(&self.session);
-            }
-        }
-    }
-}
-
-fn capture(loads: &Loads, session: &str) -> Option<Capture> {
-    let mut pending = loads.lock().ok()?;
-    if session.is_empty()
-        || session.len() > 256
-        || (!pending.contains_key(session) && pending.len() >= MAX_LOADS)
-    {
-        return None;
-    }
-    let ticket = uuid::Uuid::new_v4().to_string();
-    let (sender, receiver) = oneshot::channel();
-    pending.insert(
-        session.to_owned(),
-        PendingLoad {
-            ticket: ticket.clone(),
-            report: Some(sender),
-            upstream_reported: false,
-        },
-    );
-    Some(Capture {
-        session: session.to_owned(),
-        ticket,
-        loads: loads.clone(),
-        report: Some(receiver),
-    })
-}
-
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase")]
-struct Report {
-    session_id: String,
-    ticket: String,
-    used: u64,
-    size: u64,
-}
-
-/// Accept only an armed load and a positive native capacity. Report once.
-fn dispatch(loads: &Loads, action: &str, value: Value) -> Value {
-    let Ok(mut loads) = loads.lock() else {
-        return Value::Null;
-    };
-    if action == "capture" {
-        return value["sessionId"]
-            .as_str()
-            .and_then(|id| loads.get(id))
-            .map(|load| json!({ "ticket": load.ticket }))
-            .unwrap_or(Value::Null);
-    }
-    if action == "report" {
-        if let Ok(report) = serde_json::from_value::<Report>(value) {
-            if report.size > 0 {
-                if let Some(load) = loads
-                    .get_mut(&report.session_id)
-                    .filter(|load| load.ticket == report.ticket && !load.upstream_reported)
-                {
-                    if let Some(sender) = load.report.take() {
-                        // log-exempt: 用户取消：历史上下文请求方已结束本轮加载，放弃等待 usage 应答。
-                        let _ = sender.send(json!({ "sessionUpdate": "usage_update", "used": report.used, "size": report.size,
-                            "_meta": { "lithe": { "contextUsageSource": "history" } } }));
-                    }
-                }
-            }
-        }
-    }
-    Value::Null
-}
-
-async fn handle(
-    request: Request<Incoming>,
-    loads: Loads,
-    path: String,
-) -> Result<Response<Full<Bytes>>, Infallible> {
-    let action = request
-        .uri()
-        .path()
-        .strip_prefix(&(path + "/"))
-        .map(str::to_owned);
-    let mut response = Response::new(Full::new(Bytes::new()));
-    if request.method() != Method::POST || !matches!(action.as_deref(), Some("capture" | "report"))
-    {
-        *response.status_mut() = StatusCode::NOT_FOUND;
-        return Ok(response);
-    }
-    let body = Limited::new(request.into_body(), MAX_BODY).collect().await;
-    let value = body
-        .ok()
-        .and_then(|body| serde_json::from_slice(&body.to_bytes()).ok());
-    let Some(value) = value else {
-        *response.status_mut() = StatusCode::BAD_REQUEST;
-        return Ok(response);
-    };
-    *response.body_mut() = Full::new(Bytes::from(
-        dispatch(&loads, action.as_deref().unwrap_or_default(), value).to_string(),
-    ));
-    Ok(response)
-}
-
-#[cfg(test)]
-mod tests;
diff --git a/rust/lithe-agent-host/src/codex_context/tests.rs b/rust/lithe-agent-host/src/codex_context/tests.rs
deleted file mode 100644
index a816f41a..00000000
--- a/rust/lithe-agent-host/src/codex_context/tests.rs
+++ /dev/null
@@ -1,131 +0,0 @@
-//! Bounded recovery, stale tickets, hostile loopback requests, and cancellation.
-
-use super::*;
-
-fn report(loads: &Loads, session: &str, ticket: &str, used: u64, size: u64) {
-    dispatch(
-        loads,
-        "report",
-        json!({"sessionId": session, "ticket": ticket, "used": used, "size": size}),
-    );
-}
-
-#[tokio::test(start_paused = true)]
-async fn native_zero_and_compacted_counts_remain_actual_historical_reports() {
-    let loads = Loads::default();
-    for used in [18700, 1000, 0] {
-        let capture = capture(&loads, "session-a").unwrap();
-        report(&loads, "session-a", &capture.ticket, used, 258400);
-        let value = capture.finish().await.unwrap();
-        assert_eq!(value["used"], used);
-        assert_eq!(value["size"], 258400);
-        assert_eq!(value["_meta"]["lithe"]["contextUsageSource"], "history");
-        assert!(loads.lock().unwrap().is_empty());
-    }
-}
-
-#[tokio::test(start_paused = true)]
-async fn late_wrong_session_and_replaced_loads_cannot_supply_a_snapshot() {
-    let loads = Loads::default();
-    let old = capture(&loads, "session-a").unwrap();
-    let old_ticket = old.ticket.clone();
-    let current = capture(&loads, "session-a").unwrap();
-    drop(old);
-    assert_eq!(
-        dispatch(&loads, "capture", json!({"sessionId":"session-a"}))["ticket"],
-        current.ticket
-    );
-    report(&loads, "session-a", &old_ticket, 999, 1000);
-    report(&loads, "session-b", &current.ticket, 999, 1000);
-    report(&loads, "session-a", &current.ticket, 999, 0);
-    // Virtual time reaches the optional report deadline; no real sleep occurs.
-    assert!(current.finish().await.is_none());
-    assert!(loads.lock().unwrap().is_empty());
-    report(&loads, "session-a", &old_ticket, 1, 1000);
-    assert!(loads.lock().unwrap().is_empty());
-}
-
-#[tokio::test(start_paused = true)]
-async fn capture_count_is_bounded_and_abandoned_loads_release_their_slots() {
-    let loads = Loads::default();
-    let mut captures = (0..MAX_LOADS)
-        .map(|id| capture(&loads, &format!("session-{id}")).unwrap())
-        .collect::<Vec<_>>();
-    assert!(capture(&loads, "overflow").is_none());
-    captures.pop();
-    assert!(capture(&loads, "overflow").is_some());
-    drop(captures);
-    assert!(loads.lock().unwrap().is_empty());
-}
-
-#[tokio::test(start_paused = true)]
-async fn queued_native_reports_cannot_override_a_new_load_or_an_acp_report() {
-    let recovery = Recovery::start().await.unwrap();
-    let old = recovery.capture("session-a").unwrap();
-    report(&recovery.loads, "session-a", &old.ticket, 100, 1000);
-    let current = recovery.capture("session-a").unwrap();
-    assert!(old.finish().await.is_none());
-    report(&recovery.loads, "session-a", &current.ticket, 100, 1000);
-    recovery.prefer_upstream_report("session-a");
-    assert!(current.finish().await.is_none());
-}
-
-#[tokio::test]
-async fn loopback_requires_the_launch_capability_and_bounds_message_bodies() {
-    tokio::time::timeout(Duration::from_secs(3), async {
-        let recovery = Recovery::start().await.unwrap();
-        let client = reqwest::Client::builder()
-            .timeout(Duration::from_secs(1))
-            .no_proxy()
-            .build()
-            .unwrap();
-        let authority = url::Url::parse(recovery.url())
-            .unwrap()
-            .origin()
-            .ascii_serialization();
-        assert_eq!(
-            client
-                .post(format!("{authority}/wrong/capture"))
-                .body("{}")
-                .send()
-                .await
-                .unwrap()
-                .status(),
-            StatusCode::NOT_FOUND
-        );
-        let capture = recovery.capture("session-a").unwrap();
-        let response = client
-            .post(format!("{}/capture", recovery.url()))
-            .body(r#"{"sessionId":"session-a"}"#)
-            .send()
-            .await
-            .unwrap()
-            .bytes()
-            .await
-            .unwrap();
-        let response: Value = serde_json::from_slice(&response).unwrap();
-        assert_eq!(response["ticket"], capture.ticket);
-        assert_eq!(
-            client
-                .post(format!("{}/report", recovery.url()))
-                .body("x".repeat(MAX_BODY + 1))
-                .send()
-                .await
-                .unwrap()
-                .status(),
-            StatusCode::BAD_REQUEST
-        );
-        let payload =
-            json!({"sessionId":"session-a", "ticket":capture.ticket, "used":125300, "size":300000});
-        client
-            .post(format!("{}/report", recovery.url()))
-            .body(payload.to_string())
-            .send()
-            .await
-            .unwrap();
-        assert_eq!(capture.finish().await.unwrap()["used"], 125300);
-        drop(recovery);
-    })
-    .await
-    .expect("loopback exchange finishes within its local deadline");
-}
diff --git a/rust/lithe-agent-host/src/codex_history.rs b/rust/lithe-agent-host/src/codex_history.rs
deleted file mode 100644
index 4eaf0d91..00000000
--- a/rust/lithe-agent-host/src/codex_history.rs
+++ /dev/null
@@ -1,495 +0,0 @@
-//! Codex history and conversation activity through a short-lived official App Server.
-//!
-//! The pinned codex-acp lists only unarchived threads and offers neither an
-//! archive filter nor a conversation-activity timestamp. Like the quota probe, Lithe starts
-//! the user's Codex CLI as `codex app-server` for one bounded exchange: listing
-//! is read-only, and `thread/unarchive` runs only on an explicit user request.
-//! Codex owns the history files; Lithe never reads them and caches nothing.
-
-use super::*;
-use serde_json::{json, Value};
-use tokio::io::{AsyncBufRead, AsyncWrite, AsyncWriteExt, BufReader};
-
-const PROBE_TIMEOUT: Duration = Duration::from_secs(30);
-const CANCEL_POLL_INTERVAL: Duration = Duration::from_millis(50);
-const PAGE_SIZE: u32 = 50;
-
-/// Source kinds codex-acp lists, so archived and active history share a scope.
-const SOURCE_KINDS: [&str; 5] = ["cli", "vscode", "exec", "appServer", "unknown"];
-
-/// Threads for the workspace. `complete` is false when the page bound
-/// stopped the listing, allowing the archived-history UI to disclose truncation.
-#[derive(Debug, PartialEq, Eq)]
-pub(crate) struct ListedSessions {
-    pub sessions: Vec<AgentSessionSummary>,
-    pub complete: bool,
-}
-
-/// How to reach the same Codex CLI and history scope as the ACP connection.
-#[derive(Clone, Debug)]
-pub(crate) struct CodexHistory {
-    executable: PathBuf,
-    cwd: PathBuf,
-    /// Account directory, so archived history belongs to the selected account.
-    codex_home: Option<PathBuf>,
-}
-
-impl CodexHistory {
-    /// Validate the selected path against native discovery before changing its
-    /// configuration, then return freshly reported state from the same server.
-    pub(crate) async fn set_skill_enabled(
-        executable: PathBuf,
-        cwd: PathBuf,
-        path: PathBuf,
-        enabled: bool,
-        codex_home: Option<PathBuf>,
-        cancelled: &dyn Fn() -> bool,
-    ) -> Result<Value, &'static str> {
-        let probe = Self {
-            executable,
-            cwd: cwd.clone(),
-            codex_home,
-        };
-        probe
-            .exchange_cancellable(
-                |mut input, mut output| async move {
-                    let params = json!({"cwds": [cwd], "forceReload": true});
-                    let before = subscription::request(
-                        &mut input,
-                        &mut output,
-                        2,
-                        "skills/list",
-                        params.clone(),
-                    )
-                    .await?;
-                    let path = crate::skills::codex_skill_path(&before, &cwd, &path)
-                        .ok_or("unknown skill")?;
-                    if cancelled() {
-                        return Err("cancelled");
-                    }
-                    subscription::request(
-                        &mut input,
-                        &mut output,
-                        3,
-                        "skills/config/write",
-                        json!({"path":path,"enabled":enabled}),
-                    )
-                    .await?;
-                    subscription::request(&mut input, &mut output, 4, "skills/list", params).await
-                },
-                cancelled,
-            )
-            .await
-    }
-
-    /// Reuse the bounded, credential-free App Server lifecycle for native skill discovery.
-    pub(crate) async fn skills(
-        executable: PathBuf,
-        cwd: PathBuf,
-        codex_home: Option<PathBuf>,
-        cancelled: &dyn Fn() -> bool,
-    ) -> Result<Value, &'static str> {
-        let probe = Self {
-            executable,
-            cwd: cwd.clone(),
-            codex_home,
-        };
-        probe
-            .exchange_cancellable(
-                |mut input, mut output| async move {
-                    subscription::request(
-                        &mut input,
-                        &mut output,
-                        2,
-                        "skills/list",
-                        json!({"cwds": [cwd], "forceReload": true}),
-                    )
-                    .await
-                },
-                cancelled,
-            )
-            .await
-    }
-
-    /// Only Codex connections have archived history; other Agents return None.
-    pub(crate) fn for_launch(launch: &ResolvedLaunch) -> Option<Self> {
-        let executable = match &launch.subscription_cli {
-            Some(executable) => executable.clone(),
-            None => launch
-                .env
-                .iter()
-                .find(|(name, _)| name == "CODEX_PATH")
-                .map(|(_, value)| PathBuf::from(value))?,
-        };
-        Some(Self {
-            executable,
-            cwd: launch.cwd.clone(),
-            codex_home: launch.codex_home.clone(),
-        })
-    }
-
-    pub(crate) async fn list_active(
-        &self,
-        workspace: &workspace_context::WorkspaceContext,
-        token: &str,
-        emit: &Emit,
-    ) -> Result<Vec<AgentSessionSummary>, String> {
-        self.list(workspace, false, |threads| {
-            emit(AgentEvent::SessionsPage {
-                token: token.to_owned(),
-                sessions: threads
-                    .iter()
-                    .map(|thread| thread.summary(workspace))
-                    .collect(),
-            });
-        })
-        .await
-        .map(|listed| listed.sessions)
-    }
-
-    pub(crate) async fn list_archived(
-        &self,
-        workspace: &workspace_context::WorkspaceContext,
-    ) -> Result<ListedSessions, String> {
-        self.list(workspace, true, |_| {}).await
-    }
-
-    async fn list(
-        &self,
-        workspace: &workspace_context::WorkspaceContext,
-        archived: bool,
-        mut on_page: impl FnMut(&[HistoryThread]),
-    ) -> Result<ListedSessions, String> {
-        let workspace_path = normalize_path(&self.cwd.to_string_lossy());
-        self.exchange(|mut input, mut output| async move {
-            list_pages(
-                &mut input,
-                &mut output,
-                &workspace_path,
-                archived,
-                &mut on_page,
-            )
-            .await
-        })
-        .await
-        .map(|(threads, complete)| ListedSessions {
-            sessions: threads
-                .iter()
-                .map(|thread| thread.summary(workspace))
-                .collect(),
-            complete,
-        })
-        .map_err(|_| {
-            if archived {
-                "Codex archived history could not be read."
-            } else {
-                "Codex history could not be read."
-            }
-            .to_owned()
-        })
-    }
-
-    pub(crate) async fn unarchive(&self, session_id: String) -> Result<(), String> {
-        self.exchange(|mut input, mut output| async move {
-            subscription::request(
-                &mut input,
-                &mut output,
-                2,
-                "thread/unarchive",
-                json!({ "threadId": session_id }),
-            )
-            .await
-            .map(|_| ())
-        })
-        .await
-        .map_err(|_| "Codex could not restore this archived conversation.".to_owned())
-    }
-
-    /// Start `codex app-server`, initialize it, run `operation`, and always
-    /// terminate the process tree within the probe bound.
-    async fn exchange<T, F, Fut>(&self, operation: F) -> Result<T, &'static str>
-    where
-        F: FnOnce(tokio::process::ChildStdin, BufReader<tokio::process::ChildStdout>) -> Fut,
-        Fut: std::future::Future<Output = Result<T, &'static str>>,
-    {
-        self.exchange_cancellable(operation, || false).await
-    }
-
-    /// Cancellation participates in the exchange so cleanup is awaited before
-    /// a short-lived caller drops its Tokio runtime, including during initialization.
-    async fn exchange_cancellable<T, F, Fut, C>(
-        &self,
-        operation: F,
-        cancelled: C,
-    ) -> Result<T, &'static str>
-    where
-        F: FnOnce(tokio::process::ChildStdin, BufReader<tokio::process::ChildStdout>) -> Fut,
-        Fut: std::future::Future<Output = Result<T, &'static str>>,
-        C: Fn() -> bool,
-    {
-        let mut process = std::process::Command::new(&self.executable);
-        // History needs no credentials; never hand API overrides to this process.
-        subscription::isolate_environment(&mut process);
-        if let Some(home) = &self.codex_home {
-            process.env(subscription::CODEX_HOME_ENVIRONMENT, home);
-        }
-        process
-            .arg("app-server")
-            .current_dir(&self.cwd)
-            .stdin(Stdio::piped())
-            .stdout(Stdio::piped())
-            .stderr(Stdio::null());
-        if let Some(path) = child_path(&self.executable, environment::search_path()) {
-            process.env("PATH", path);
-        }
-        #[cfg(unix)]
-        {
-            use std::os::unix::process::CommandExt;
-            process.process_group(0);
-        }
-        let mut process = tokio::process::Command::from(process);
-        #[cfg(windows)]
-        {
-            process.creation_flags(CREATE_NO_WINDOW);
-        }
-        process.kill_on_drop(true);
-        let mut child = subscription::ProbeProcess(process.spawn().map_err(|_| "unavailable")?);
-        let result = {
-            let exchange = async {
-                let mut input = child.0.stdin.take().ok_or("unavailable")?;
-                let mut output = BufReader::new(child.0.stdout.take().ok_or("unavailable")?);
-                initialize(&mut input, &mut output).await?;
-                operation(input, output).await
-            };
-            let bounded = tokio::time::timeout(PROBE_TIMEOUT, exchange);
-            tokio::pin!(bounded);
-            loop {
-                if cancelled() {
-                    break Err("cancelled");
-                }
-                tokio::select! {
-                    result = &mut bounded => break result.unwrap_or(Err("timeout")),
-                    _ = tokio::time::sleep(CANCEL_POLL_INTERVAL) => {}
-                }
-            }
-        };
-        terminate_tree(&mut child.0).await;
-        result
-    }
-}
-
-async fn initialize(
-    input: &mut (impl AsyncWrite + Unpin),
-    output: &mut (impl AsyncBufRead + Unpin),
-) -> Result<(), &'static str> {
-    subscription::request(
-        input,
-        output,
-        1,
-        "initialize",
-        json!({"clientInfo": {"name": "lithe-history", "version": "1"}}),
-    )
-    .await?;
-    input
-        .write_all(b"{\"method\":\"initialized\"}\n")
-        .await
-        .map_err(|_| "unavailable")
-}
-
-#[derive(Debug, PartialEq, Eq)]
-struct HistoryThread {
-    id: String,
-    title: Option<String>,
-    updated_at: Option<String>,
-    model_provider: Option<String>,
-}
-
-impl HistoryThread {
-    /// Pages and final snapshots share title filtering and activity semantics.
-    fn summary(&self, workspace: &workspace_context::WorkspaceContext) -> AgentSessionSummary {
-        AgentSessionSummary {
-            session_id: self.id.clone(),
-            title: self
-                .title
-                .as_deref()
-                .and_then(|title| workspace.present_title(title)),
-            updated_at: self.updated_at.clone(),
-            model_provider: self.model_provider.clone(),
-        }
-    }
-}
-
-/// Follow cursors to the end. A page whose threads all belong to other
-/// workspaces is still followed: filtering is local, so an empty page does
-/// not mean the history ended.
-async fn list_pages(
-    input: &mut (impl AsyncWrite + Unpin),
-    output: &mut (impl AsyncBufRead + Unpin),
-    workspace: &str,
-    archived: bool,
-    on_page: &mut impl FnMut(&[HistoryThread]),
-) -> Result<(Vec<HistoryThread>, bool), &'static str> {
-    let mut threads = Vec::new();
-    let mut seen = std::collections::HashSet::new();
-    let mut cursor: Option<String> = None;
-    for page in 0..MAX_SESSION_LIST_PAGES {
-        let result = subscription::request(
-            input,
-            output,
-            2 + page as u64,
-            "thread/list",
-            json!({
-                "archived": archived,
-                "sortKey": "recency_at",
-                // Read-only listing must not repair metadata from rollout file modification times.
-                "useStateDbOnly": true,
-                "cursor": cursor,
-                // Bounded pages keep each reply under the probe's size limit.
-                "limit": PAGE_SIZE,
-                // Billing routes can change without changing this account's
-                // history. The official API's empty filter includes native,
-                // gateway and previous providers without guessing their ids.
-                "modelProviders": [],
-                "sourceKinds": SOURCE_KINDS,
-            }),
-        )
-        .await?;
-        let (page_threads, next) = parse_page(&result, workspace)?;
-        let first_new = threads.len();
-        for thread in page_threads {
-            if seen.insert(thread.id.clone()) {
-                threads.push(thread);
-            }
-        }
-        // Do not wait for a later global page to expose this workspace's rows.
-        // Deduplication and recency normalization are identical to the final snapshot.
-        if next.is_some() && threads.len() > first_new {
-            on_page(&threads[first_new..]);
-        }
-        match next {
-            Some(next) => cursor = Some(next),
-            None => return Ok((threads, true)),
-        }
-    }
-    Ok((threads, false))
-}
-
-/// Threads of one `thread/list` page that belong to `workspace`, and the next cursor.
-fn parse_page(
-    result: &Value,
-    workspace: &str,
-) -> Result<(Vec<HistoryThread>, Option<String>), &'static str> {
-    let data = result["data"].as_array().ok_or("unparsable")?;
-    let threads = data
-        .iter()
-        .filter_map(|thread| {
-            let id = thread["id"].as_str().filter(|id| !id.is_empty())?;
-            let cwd = thread["cwd"].as_str()?;
-            if normalize_path(cwd) != workspace {
-                return None;
-            }
-            // Same title rule as codex-acp: the user's name, else the preview.
-            let title = [&thread["name"], &thread["preview"]]
-                .into_iter()
-                .filter_map(Value::as_str)
-                .find(|title| !title.trim().is_empty())
-                .map(str::to_owned);
-            Some(HistoryThread {
-                id: id.to_owned(),
-                title,
-                // Resume/settings can touch updatedAt without a new conversation turn.
-                // Missing activity is unknown; never substitute metadata time or the local clock.
-                updated_at: thread["recencyAt"].as_i64().and_then(iso8601),
-                model_provider: thread["modelProvider"]
-                    .as_str()
-                    .map(str::trim)
-                    .filter(|provider| !provider.is_empty())
-                    .map(str::to_owned),
-            })
-        })
-        .collect();
-    let next = result["nextCursor"]
-        .as_str()
-        .filter(|cursor| !cursor.is_empty())
-        .map(str::to_owned);
-    Ok((threads, next))
-}
-
-/// codex-acp's comparison: `.`/`..` and repeated or trailing separators are
-/// normalized; Windows drive and UNC paths compare case-insensitively.
-fn normalize_path(value: &str) -> String {
-    let trimmed = value.trim();
-    let bytes = trimmed.as_bytes();
-    let windows = (bytes.len() >= 3
-        && bytes[0].is_ascii_alphabetic()
-        && bytes[1] == b':'
-        && (bytes[2] == b'\\' || bytes[2] == b'/'))
-        || trimmed.starts_with("\\\\");
-    let slashed = if windows {
-        trimmed.replace('\\', "/")
-    } else {
-        trimmed.to_owned()
-    };
-    let absolute = slashed.starts_with('/');
-    let unc = windows && slashed.starts_with("//");
-    let mut parts: Vec<&str> = Vec::new();
-    for part in slashed.split('/') {
-        match part {
-            "" | "." => {}
-            ".." => {
-                if parts.last().is_some_and(|last| *last != "..") {
-                    parts.pop();
-                } else if !absolute {
-                    parts.push("..");
-                }
-            }
-            part => parts.push(part),
-        }
-    }
-    let joined = parts.join("/");
-    let normalized = match (unc, absolute) {
-        (true, _) => format!("//{joined}"),
-        (false, true) => format!("/{joined}"),
-        (false, false) => joined,
-    };
-    if windows {
-        normalized.to_lowercase()
-    } else {
-        normalized
-    }
-}
-
-/// Unix seconds as `YYYY-MM-DDTHH:MM:SSZ`, the form the platforms already parse.
-fn iso8601(seconds: i64) -> Option<String> {
-    // The platform parser expects a four-digit ISO year, through 9999-12-31.
-    const MAX_ISO8601_SECONDS: i64 = 253_402_300_799;
-    if !(0..=MAX_ISO8601_SECONDS).contains(&seconds) {
-        return None;
-    }
-    let days = seconds / 86_400;
-    let time = seconds % 86_400;
-    // Howard Hinnant's civil_from_days.
-    let z = days + 719_468;
-    let era = z / 146_097;
-    let day_of_era = z - era * 146_097;
-    let year_of_era =
-        (day_of_era - day_of_era / 1_460 + day_of_era / 36_524 - day_of_era / 146_096) / 365;
-    let day_of_year = day_of_era - (365 * year_of_era + year_of_era / 4 - year_of_era / 100);
-    let month_index = (5 * day_of_year + 2) / 153;
-    let day = day_of_year - (153 * month_index + 2) / 5 + 1;
-    let month = if month_index < 10 {
-        month_index + 3
-    } else {
-        month_index - 9
-    };
-    let year = year_of_era + era * 400 + i64::from(month <= 2);
-    Some(format!(
-        "{year:04}-{month:02}-{day:02}T{:02}:{:02}:{:02}Z",
-        time / 3_600,
-        time / 60 % 60,
-        time % 60
-    ))
-}
-
-#[cfg(test)]
-mod tests;
diff --git a/rust/lithe-agent-host/src/codex_history/tests.rs b/rust/lithe-agent-host/src/codex_history/tests.rs
deleted file mode 100644
index aa5ec055..00000000
--- a/rust/lithe-agent-host/src/codex_history/tests.rs
+++ /dev/null
@@ -1,567 +0,0 @@
-//! Archived Codex history: scope, paging and the one state-changing request.
-use super::*;
-use tokio::io::{AsyncBufReadExt, DuplexStream, ReadHalf, WriteHalf};
-
-const WORKSPACE: &str = "/fixture/workspace";
-
-fn launch(env: Vec<(String, String)>, subscription_cli: Option<PathBuf>) -> ResolvedLaunch {
-    ResolvedLaunch {
-        command: PathBuf::from("/fixture/codex-acp"),
-        args: Vec::new(),
-        cwd: PathBuf::from(WORKSPACE),
-        env,
-        gateway: None,
-        secret: String::new(),
-        subscription_cli,
-        claude_subscription: false,
-        codex_home: None,
-        claude_projects: None,
-    }
-}
-
-fn thread(id: &str, cwd: &str) -> Value {
-    json!({"id": id, "cwd": cwd, "name": null, "preview": format!("Preview {id}"), "updatedAt": 1789993000, "recencyAt": 1789893000})
-}
-
-/// Answer each `thread/list` request with `page(index, params)`, then report
-/// every params object it received.
-async fn serve_pages(
-    server: DuplexStream,
-    pages: usize,
-    page: impl Fn(usize) -> Value,
-) -> Vec<Value> {
-    let (reader, mut writer) = tokio::io::split(server);
-    let mut lines = BufReader::new(reader).lines();
-    let mut received = Vec::new();
-    for index in 0..pages {
-        let request: Value =
-            serde_json::from_str(&lines.next_line().await.unwrap().unwrap()).unwrap();
-        assert_eq!(request["method"], "thread/list");
-        received.push(request["params"].clone());
-        writer
-            .write_all(
-                format!("{}\n", json!({"id": request["id"], "result": page(index)})).as_bytes(),
-            )
-            .await
-            .unwrap();
-    }
-    received
-}
-
-fn client(client: DuplexStream) -> (WriteHalf<DuplexStream>, BufReader<ReadHalf<DuplexStream>>) {
-    let (reader, writer) = tokio::io::split(client);
-    (writer, BufReader::new(reader))
-}
-
-#[test]
-fn only_codex_launches_have_history_in_the_selected_account() {
-    let mut subscription_launch = launch(
-        vec![("CODEX_PATH".into(), "/fixture/other".into())],
-        Some(PathBuf::from("/fixture/codex")),
-    );
-    subscription_launch.codex_home = Some(PathBuf::from("/fixture/account"));
-    let subscription = CodexHistory::for_launch(&subscription_launch).unwrap();
-    assert_eq!(subscription.executable, PathBuf::from("/fixture/codex"));
-    assert_eq!(subscription.codex_home, subscription_launch.codex_home);
-
-    let gateway = CodexHistory::for_launch(&launch(
-        vec![("CODEX_PATH".into(), "/fixture/codex".into())],
-        None,
-    ))
-    .unwrap();
-    assert_eq!(gateway.executable, PathBuf::from("/fixture/codex"));
-
-    let claude = launch(
-        vec![("CLAUDE_CODE_EXECUTABLE".into(), "/fixture/claude".into())],
-        None,
-    );
-    assert!(CodexHistory::for_launch(&claude).is_none());
-}
-
-#[test]
-fn workspace_paths_compare_like_codex_acp() {
-    assert_eq!(normalize_path("/w/project/"), "/w/project");
-    assert_eq!(normalize_path("/w/./other/../project//"), "/w/project");
-    assert_ne!(normalize_path("/W/Project"), normalize_path("/w/project"));
-    assert_eq!(normalize_path("C:\\Work\\Project\\"), "c:/work/project");
-    assert_eq!(normalize_path("c:/work/project"), "c:/work/project");
-    assert_eq!(
-        normalize_path("\\\\Server\\Share\\Repo"),
-        "//server/share/repo"
-    );
-}
-
-#[test]
-fn updated_at_seconds_become_utc_timestamps() {
-    assert_eq!(iso8601(0).as_deref(), Some("1970-01-01T00:00:00Z"));
-    assert_eq!(iso8601(951782400).as_deref(), Some("2000-02-29T00:00:00Z"));
-    assert_eq!(iso8601(1789893000).as_deref(), Some("2026-09-20T08:30:00Z"));
-    assert_eq!(iso8601(4133980799).as_deref(), Some("2100-12-31T23:59:59Z"));
-    assert_eq!(iso8601(-1), None);
-    assert_eq!(iso8601(i64::MAX), None);
-}
-
-#[test]
-fn viewing_history_preserves_activity_but_a_new_turn_advances_it() {
-    let fixture: Value = serde_json::from_str(include_str!(
-        "../../../fixtures/agent/history-activity-v1.json"
-    ))
-    .unwrap();
-    for stage in ["initial", "afterViewing", "afterMessage"] {
-        let (threads, _) = parse_page(&fixture[stage]["upstream"], WORKSPACE).unwrap();
-        let sessions: Vec<_> = threads
-            .into_iter()
-            .map(|thread| AgentSessionSummary {
-                session_id: thread.id,
-                title: thread.title,
-                updated_at: thread.updated_at,
-                model_provider: thread.model_provider,
-            })
-            .collect();
-        assert_eq!(
-            serde_json::to_value(sessions).unwrap(),
-            fixture[stage]["event"]["sessions"]
-        );
-    }
-    assert_eq!(
-        fixture["initial"]["event"],
-        fixture["afterViewing"]["event"]
-    );
-    assert_ne!(
-        fixture["initial"]["event"],
-        fixture["afterMessage"]["event"]
-    );
-}
-
-#[test]
-fn missing_or_invalid_activity_never_falls_back_to_metadata_time() {
-    for activity in [
-        Value::Null,
-        json!("1789893000"),
-        json!(-1),
-        json!(true),
-        json!(i64::MAX),
-    ] {
-        let mut row = thread("unknown", WORKSPACE);
-        row["recencyAt"] = activity;
-        let (threads, _) = parse_page(&json!({"data": [row]}), WORKSPACE).unwrap();
-        assert_eq!(threads[0].updated_at, None);
-    }
-}
-
-#[test]
-fn provider_identity_is_upstream_metadata_and_missing_values_remain_unknown() {
-    for (value, expected) in [
-        (json!("native-provider"), Some("native-provider")),
-        (json!(" previous-provider "), Some("previous-provider")),
-        (Value::Null, None),
-        (json!(" \n "), None),
-        (json!(42), None),
-    ] {
-        let mut row = thread("source", WORKSPACE);
-        row["modelProvider"] = value;
-        let (threads, _) = parse_page(&json!({"data": [row]}), WORKSPACE).unwrap();
-        assert_eq!(threads[0].model_provider.as_deref(), expected);
-        let workspace = workspace_context::WorkspaceContext::new(Path::new(WORKSPACE)).unwrap();
-        let summary = serde_json::to_value(threads[0].summary(&workspace)).unwrap();
-        assert_eq!(summary["modelProvider"], json!(expected));
-        if expected.is_none() {
-            assert!(
-                summary.get("modelProvider").is_none(),
-                "older wire shape stays compatible"
-            );
-        }
-    }
-}
-
-#[test]
-fn pages_keep_only_this_workspace_and_prefer_the_user_title() {
-    let page = json!({
-        "data": [
-            {"id": "named", "cwd": "/fixture/workspace/", "name": "Renamed", "preview": "First prompt", "updatedAt": 1789993000, "recencyAt": 1789893000},
-            {"id": "preview", "cwd": WORKSPACE, "name": " ", "preview": "First prompt"},
-            {"id": "elsewhere", "cwd": "/fixture/other", "name": "Other"},
-            {"id": "no-cwd", "name": "Unknown"},
-            {"id": "", "cwd": WORKSPACE}
-        ],
-        "nextCursor": "page-2"
-    });
-    let (threads, next) = parse_page(&page, WORKSPACE).unwrap();
-    assert_eq!(
-        threads,
-        vec![
-            HistoryThread {
-                id: "named".into(),
-                title: Some("Renamed".into()),
-                updated_at: Some("2026-09-20T08:30:00Z".into()),
-                model_provider: None,
-            },
-            HistoryThread {
-                id: "preview".into(),
-                title: Some("First prompt".into()),
-                updated_at: None,
-                model_provider: None,
-            },
-        ]
-    );
-    assert_eq!(next.as_deref(), Some("page-2"));
-    assert_eq!(
-        parse_page(&json!({"data": [], "nextCursor": ""}), WORKSPACE)
-            .unwrap()
-            .1,
-        None
-    );
-    assert!(parse_page(&json!({}), WORKSPACE).is_err());
-}
-
-#[tokio::test]
-async fn listing_follows_cursors_past_foreign_pages_without_duplicates() {
-    let (local, server) = tokio::io::duplex(64 * 1024);
-    let (mut writer, mut reader) = client(local);
-    let mut on_page = |_: &[HistoryThread]| {};
-    let peer = serve_pages(server, 3, |index| match index {
-        0 => json!({"data": [thread("a", WORKSPACE)], "nextCursor": "c1"}),
-        // Another workspace fills this page; the history has not ended.
-        1 => json!({"data": [thread("x", "/fixture/other")], "nextCursor": "c2"}),
-        _ => json!({"data": [thread("a", WORKSPACE), thread("b", WORKSPACE)], "nextCursor": null}),
-    });
-    let (result, received) = tokio::time::timeout(Duration::from_secs(5), async {
-        tokio::join!(
-            list_pages(&mut writer, &mut reader, WORKSPACE, true, &mut on_page),
-            peer
-        )
-    })
-    .await
-    .expect("bounded in-memory listing");
-    let (threads, complete) = result.unwrap();
-    assert!(complete);
-    let ids: Vec<_> = threads.iter().map(|thread| thread.id.as_str()).collect();
-    assert_eq!(ids, ["a", "b"]);
-    assert_eq!(received[0]["archived"], true);
-    assert_eq!(received[0]["sortKey"], "recency_at");
-    assert_eq!(received[0]["useStateDbOnly"], true);
-    assert_eq!(received[0]["cursor"], Value::Null);
-    assert_eq!(received[0]["modelProviders"], json!([]));
-    assert_eq!(received[0]["sourceKinds"], json!(SOURCE_KINDS));
-    assert_eq!(received[1]["cursor"], "c1");
-    assert_eq!(received[2]["cursor"], "c2");
-}
-
-#[tokio::test]
-async fn active_and_archived_history_include_native_and_previous_providers() {
-    for archived in [false, true] {
-        let (local, server) = tokio::io::duplex(64 * 1024);
-        let (mut writer, mut reader) = client(local);
-        let mut on_page = |_: &[HistoryThread]| {};
-        let peer = async {
-            let (reader, mut writer) = tokio::io::split(server);
-            let mut lines = BufReader::new(reader).lines();
-            let request: Value =
-                serde_json::from_str(&lines.next_line().await.unwrap().unwrap()).unwrap();
-            let providers = request["params"]["modelProviders"].as_array().unwrap();
-            let rows: Vec<_> = [
-                "openai",
-                "custom-gateway",
-                "native-provider",
-                "previous-provider",
-            ]
-            .into_iter()
-            .filter(|provider| providers.is_empty() || providers.contains(&json!(provider)))
-            .map(|provider| {
-                let mut row = thread(provider, WORKSPACE);
-                row["modelProvider"] = json!(provider);
-                row
-            })
-            .chain([thread("foreign", "/fixture/other")])
-            .collect();
-            writer
-                .write_all(
-                    format!(
-                        "{}\n",
-                        json!({"id": request["id"], "result": {"data": rows, "nextCursor": null}})
-                    )
-                    .as_bytes(),
-                )
-                .await
-                .unwrap();
-            request["params"].clone()
-        };
-        let (result, params) = tokio::time::timeout(Duration::from_secs(5), async {
-            tokio::join!(
-                list_pages(&mut writer, &mut reader, WORKSPACE, archived, &mut on_page),
-                peer
-            )
-        })
-        .await
-        .expect("bounded mixed-provider history listing");
-        let (threads, complete) = result.unwrap();
-        assert!(complete);
-        assert_eq!(
-            threads
-                .iter()
-                .map(|thread| thread.model_provider.as_deref())
-                .collect::<Vec<_>>(),
-            [
-                Some("openai"),
-                Some("custom-gateway"),
-                Some("native-provider"),
-                Some("previous-provider")
-            ]
-        );
-        assert_eq!(
-            threads
-                .iter()
-                .map(|thread| thread.id.as_str())
-                .collect::<Vec<_>>(),
-            [
-                "openai",
-                "custom-gateway",
-                "native-provider",
-                "previous-provider"
-            ]
-        );
-        assert_eq!(params["archived"], archived);
-        assert_eq!(params["sourceKinds"], json!(SOURCE_KINDS));
-        assert_eq!(params["useStateDbOnly"], true);
-    }
-}
-
-#[tokio::test]
-async fn listing_reports_when_the_page_bound_truncated_it() {
-    let (local, server) = tokio::io::duplex(64 * 1024);
-    let (mut writer, mut reader) = client(local);
-    let mut on_page = |_: &[HistoryThread]| {};
-    let peer = serve_pages(
-        server,
-        MAX_SESSION_LIST_PAGES,
-        |index| json!({"data": [thread(&format!("t{index}"), WORKSPACE)], "nextCursor": format!("c{index}")}),
-    );
-    let (result, received) = tokio::time::timeout(Duration::from_secs(5), async {
-        tokio::join!(
-            list_pages(&mut writer, &mut reader, WORKSPACE, true, &mut on_page),
-            peer
-        )
-    })
-    .await
-    .expect("bounded in-memory listing");
-    let (threads, complete) = result.unwrap();
-    assert!(!complete);
-    assert_eq!(threads.len(), MAX_SESSION_LIST_PAGES);
-    assert_eq!(received.len(), MAX_SESSION_LIST_PAGES);
-}
-
-#[tokio::test]
-async fn active_history_publishes_matching_rows_before_later_pages_without_duplicates() {
-    let (local, server) = tokio::io::duplex(64 * 1024);
-    let (mut writer, mut reader) = client(local);
-    let workspace = workspace_context::WorkspaceContext::new(Path::new(WORKSPACE)).unwrap();
-    let published = Mutex::new(Vec::<Vec<AgentSessionSummary>>::new());
-    let mut on_page = |threads: &[HistoryThread]| {
-        published.lock().unwrap().push(
-            threads
-                .iter()
-                .map(|thread| thread.summary(&workspace))
-                .collect(),
-        );
-    };
-    let peer = serve_pages(server, 4, |index| {
-        if index > 0 {
-            // Each next request is observed before its response is sent. The first
-            // page must already be visible, even while the scan is incomplete.
-            let pages = published.lock().unwrap();
-            assert_eq!(
-                pages.len(),
-                1,
-                "Foreign and duplicate-only pages add no rows"
-            );
-            assert_eq!(pages[0][0].session_id, "a");
-            assert_eq!(pages[0][0].title.as_deref(), Some("Preview a"));
-            assert_eq!(
-                pages[0][0].updated_at.as_deref(),
-                Some("2026-09-20T08:30:00Z")
-            );
-        }
-        match index {
-            0 => json!({"data": [thread("a", WORKSPACE)], "nextCursor": "c1"}),
-            1 => json!({"data": [thread("foreign", "/fixture/other")], "nextCursor": "c2"}),
-            2 => json!({"data": [thread("a", WORKSPACE)], "nextCursor": "c3"}),
-            _ => json!({"data": [thread("b", WORKSPACE)], "nextCursor": null}),
-        }
-    });
-    let (result, received) = tokio::time::timeout(Duration::from_secs(5), async {
-        tokio::join!(
-            list_pages(&mut writer, &mut reader, WORKSPACE, false, &mut on_page),
-            peer
-        )
-    })
-    .await
-    .expect("bounded incremental official history listing");
-    let (threads, complete) = result.unwrap();
-    assert!(complete);
-    assert_eq!(
-        threads
-            .iter()
-            .map(|thread| thread.id.as_str())
-            .collect::<Vec<_>>(),
-        ["a", "b"]
-    );
-    assert_eq!(
-        published.lock().unwrap().len(),
-        1,
-        "The final page belongs to the full snapshot"
-    );
-    assert!(received
-        .iter()
-        .all(|params| params["useStateDbOnly"] == true
-            && params["sortKey"] == "recency_at"
-            && params["archived"] == false));
-}
-
-/// A fake `codex app-server` that records requests and answers every id.
-#[cfg(unix)]
-fn fake_app_server(directory: &Path, reply: &str) -> PathBuf {
-    use std::os::unix::fs::PermissionsExt;
-    let log = directory.join("requests.log");
-    let script = directory.join("codex");
-    std::fs::write(
-        &script,
-        format!(
-            "#!/bin/sh\n[ \"$1\" = app-server ] || exit 2\nwhile IFS= read -r line; do\n  printf '%s\\n' \"$line\" >> '{}'\n  id=$(printf '%s' \"$line\" | sed -n 's/.*\"id\":\\([0-9]*\\).*/\\1/p')\n  [ -n \"$id\" ] && printf '{{\"id\":%s,{reply}}}\\n' \"$id\"\ndone\n",
-            log.display()
-        ),
-    )
-    .unwrap();
-    std::fs::set_permissions(&script, std::fs::Permissions::from_mode(0o755)).unwrap();
-    script
-}
-
-#[cfg(unix)]
-struct TempDirectory(PathBuf);
-
-#[cfg(unix)]
-impl TempDirectory {
-    fn new(name: &str) -> Self {
-        let path =
-            std::env::temp_dir().join(format!("lithe-codex-history-{name}-{}", std::process::id()));
-        let _ = std::fs::remove_dir_all(&path);
-        std::fs::create_dir_all(&path).unwrap();
-        Self(path)
-    }
-}
-
-#[cfg(unix)]
-impl Drop for TempDirectory {
-    fn drop(&mut self) {
-        let _ = std::fs::remove_dir_all(&self.0);
-    }
-}
-
-#[cfg(unix)]
-#[tokio::test]
-async fn active_and_archived_listing_only_read_official_activity_metadata() {
-    let directory = TempDirectory::new("activity");
-    let mut row = thread("saved", directory.0.to_str().unwrap());
-    row["updatedAt"] = json!(1789993000);
-    let reply = format!("\"result\":{}", json!({"data": [row], "nextCursor": null}));
-    let history = CodexHistory {
-        executable: fake_app_server(&directory.0, &reply),
-        cwd: directory.0.clone(),
-        codex_home: None,
-    };
-    let workspace = workspace_context::WorkspaceContext::new(&directory.0).unwrap();
-    let emit: Emit = Arc::new(|_| {});
-    tokio::time::timeout(Duration::from_secs(10), async {
-        let active = history
-            .list_active(&workspace, "active", &emit)
-            .await
-            .unwrap();
-        let archived = history.list_archived(&workspace).await.unwrap();
-        assert_eq!(active, archived.sessions);
-        assert_eq!(
-            active[0].updated_at.as_deref(),
-            Some("2026-09-20T08:30:00Z")
-        );
-    })
-    .await
-    .expect("bounded official history reads");
-    let requests: Vec<Value> = std::fs::read_to_string(directory.0.join("requests.log"))
-        .unwrap()
-        .lines()
-        .map(|line| serde_json::from_str(line).unwrap())
-        .collect();
-    let methods: Vec<_> = requests
-        .iter()
-        .map(|request| request["method"].as_str().unwrap())
-        .collect();
-    assert_eq!(
-        methods,
-        [
-            "initialize",
-            "initialized",
-            "thread/list",
-            "initialize",
-            "initialized",
-            "thread/list"
-        ]
-    );
-    let lists: Vec<_> = requests
-        .iter()
-        .filter(|request| request["method"] == "thread/list")
-        .collect();
-    assert_eq!(lists[0]["params"]["archived"], false);
-    assert_eq!(lists[1]["params"]["archived"], true);
-    assert!(lists
-        .iter()
-        .all(|request| request["params"]["useStateDbOnly"] == true));
-}
-
-#[cfg(unix)]
-#[tokio::test]
-async fn unarchive_sends_only_the_selected_thread_to_the_users_cli() {
-    let directory = TempDirectory::new("unarchive");
-    let history = CodexHistory {
-        executable: fake_app_server(&directory.0, "\"result\":{\"thread\":{}}"),
-        cwd: directory.0.clone(),
-        codex_home: None,
-    };
-    tokio::time::timeout(
-        Duration::from_secs(10),
-        history.unarchive("thread-1".into()),
-    )
-    .await
-    .expect("bounded app-server exchange")
-    .unwrap();
-    let requests: Vec<Value> = std::fs::read_to_string(directory.0.join("requests.log"))
-        .unwrap()
-        .lines()
-        .map(|line| serde_json::from_str(line).unwrap())
-        .collect();
-    let methods: Vec<_> = requests
-        .iter()
-        .map(|request| request["method"].as_str().unwrap())
-        .collect();
-    assert_eq!(methods, ["initialize", "initialized", "thread/unarchive"]);
-    assert_eq!(requests[2]["params"], json!({"threadId": "thread-1"}));
-}
-
-#[cfg(unix)]
-#[tokio::test]
-async fn upstream_errors_never_reach_the_ui() {
-    let directory = TempDirectory::new("error");
-    let history = CodexHistory {
-        executable: fake_app_server(
-            &directory.0,
-            "\"error\":{\"message\":\"/Users/secret/.codex failed\"}",
-        ),
-        cwd: directory.0.clone(),
-        codex_home: None,
-    };
-    let error = tokio::time::timeout(
-        Duration::from_secs(10),
-        history.unarchive("thread-1".into()),
-    )
-    .await
-    .expect("bounded app-server exchange")
-    .unwrap_err();
-    assert_eq!(error, "Codex could not restore this archived conversation.");
-}
diff --git a/rust/lithe-agent-host/src/codex_retry.rs b/rust/lithe-agent-host/src/codex_retry.rs
deleted file mode 100644
index 566dde66..00000000
--- a/rust/lithe-agent-host/src/codex_retry.rs
+++ /dev/null
@@ -1,148 +0,0 @@
-//! Native Codex configuration compatibility and bounded reconnect observation.
-//!
-//! The public ACP adapter replaces the gateway provider table. A per-launch
-//! stdio relay supplies native App Server options without modifying the user's
-//! CLI, configuration, or installed adapter. Native Codex still owns recovery.
-//! Decision: .agents/notes/implemented/architecture/2026-09-25-shared-acp-agent-conversation.md
-
-use std::path::{Path, PathBuf};
-
-use serde_json::Value;
-
-use crate::prompt_retry::MAX_ATTEMPTS;
-
-/// One launch owns its temporary helper until the complete process tree stops.
-pub(crate) struct Relay(PathBuf);
-
-impl Relay {
-    pub(crate) fn create(
-        executable: &Path,
-        native_recovery: bool,
-    ) -> Result<(Self, Vec<(String, String)>), String> {
-        let directory =
-            std::env::temp_dir().join(format!("lithe-codex-retry-{}", uuid::Uuid::new_v4()));
-        std::fs::create_dir(&directory)
-            .map_err(|_| "Could not prepare Codex retry configuration")?;
-        let relay = Self(directory);
-        #[cfg(unix)]
-        {
-            use std::os::unix::fs::PermissionsExt;
-            std::fs::set_permissions(&relay.0, std::fs::Permissions::from_mode(0o700))
-                .map_err(|_| "Could not protect Codex retry launcher")?;
-        }
-        let script = relay.0.join("codex-config-relay.cjs");
-        std::fs::write(&script, include_str!("codex-config-relay.cjs"))
-            .map_err(|_| "Could not write Codex retry configuration")?;
-        #[cfg(unix)]
-        {
-            use std::os::unix::fs::PermissionsExt;
-            std::fs::set_permissions(&script, std::fs::Permissions::from_mode(0o700))
-                .map_err(|_| "Could not prepare Codex retry launcher")?;
-        }
-        #[cfg(windows)]
-        let script = {
-            let launcher = relay.0.join("codex-config-relay.cmd");
-            // Only the upstream adapter's fixed `app-server` argument reaches
-            // this launcher. Paths resolve beside it; credentials remain stdio.
-            std::fs::write(
-                &launcher,
-                "@echo off\r\nnode \"%~dp0codex-config-relay.cjs\" app-server\r\n",
-            )
-            .map_err(|_| "Could not prepare Codex retry launcher")?;
-            launcher
-        };
-        Ok((
-            relay,
-            vec![
-                ("CODEX_PATH".into(), script.to_string_lossy().into_owned()),
-                (
-                    "LITHE_CODEX_NATIVE_RECOVERY".into(),
-                    if native_recovery { "1" } else { "0" }.into(),
-                ),
-                (
-                    "LITHE_CODEX_EXECUTABLE".into(),
-                    executable.to_string_lossy().into_owned(),
-                ),
-                (
-                    "LITHE_CODEX_STREAM_RETRIES".into(),
-                    (MAX_ATTEMPTS - 1).to_string(),
-                ),
-            ],
-        ))
-    }
-}
-
-impl Drop for Relay {
-    fn drop(&mut self) {
-        crate::failure_log::cleanup(
-            "agent.retry.cleanup_failed",
-            "launcher",
-            std::fs::remove_dir_all(&self.0),
-        );
-    }
-}
-
-/// Decode only the relay's envelope inside negotiated native failure metadata.
-/// Malformed or ordinary provider titles retain the adapter's own category.
-pub(crate) fn failure(title: &str) -> Option<Value> {
-    if title.len() > 64 * 1024 {
-        return None;
-    }
-    let value: Value = serde_json::from_str(title).ok()?;
-    let failure = value.get("litheCodexFailure")?;
-    failure.get("message")?.as_str()?;
-    failure.get("codexErrorInfo")?;
-    Some(failure.clone())
-}
-
-pub(crate) fn permanent(failure: &Value) -> bool {
-    let info = &failure["codexErrorInfo"];
-    if matches!(
-        info.as_str(),
-        Some(
-            "unauthorized"
-                | "badRequest"
-                | "usageLimitExceeded"
-                | "contextWindowExceeded"
-                | "sessionBudgetExceeded"
-                | "cyberPolicy"
-                | "misalignmentPolicyViolation"
-        )
-    ) {
-        return true;
-    }
-    info.as_object().is_some_and(|variants| {
-        variants.values().any(|details| {
-            details["httpStatusCode"].as_u64().is_some_and(|status| {
-                status < 500 && status >= 400 && !matches!(status, 408 | 409 | 429)
-            })
-        })
-    })
-}
-
-/// Native HTTP 429 can exhaust immediately: its public HTTP retry policy
-/// excludes rate limits. Only that typed gap may use the pre-work Host replay;
-/// pre-work native retries and this fallback share one five-attempt budget.
-pub(crate) fn rate_limit(error: &agent_client_protocol::Error) -> bool {
-    let Some(native) = error
-        .data
-        .as_ref()
-        .and_then(|data| data["sessionFailure"]["title"].as_str())
-        .and_then(failure)
-    else {
-        return false;
-    };
-    !permanent(&native)
-        && native["codexErrorInfo"]
-            .as_object()
-            .is_some_and(|variants| {
-                variants
-                    .values()
-                    .any(|details| details["httpStatusCode"] == 429)
-            })
-}
-
-pub(crate) fn terminal_sequence(error: &agent_client_protocol::Error) -> Option<u64> {
-    let title = error.data.as_ref()?["sessionFailure"]["title"].as_str()?;
-    failure(title)?["sequence"].as_u64()
-}
diff --git a/rust/lithe-agent-host/src/edit_review.rs b/rust/lithe-agent-host/src/edit_review.rs
deleted file mode 100644
index cfbbe071..00000000
--- a/rust/lithe-agent-host/src/edit_review.rs
+++ /dev/null
@@ -1,403 +0,0 @@
-//! Agent edit evidence: one normalization of ACP diff reports and one rollback planner.
-//!
-//! The Host annotates every presented tool update that restates its diffs with
-//! `_meta.lithe.diffs`, so both desktop products store identical evidence and
-//! revert eligibility. Text limits count Unicode scalar values: Rust `char`,
-//! Swift `unicodeScalars` and JavaScript code points agree on them, unlike
-//! grapheme clusters or UTF-16 code units. Rollback planning is pure text work;
-//! path containment, encoding, guarded writes and Trash stay with the platform.
-//! Contract: `rust/contracts/agent-edit-review.md`.
-
-use serde::{Deserialize, Serialize};
-use serde_json::{json, Value};
-
-/// Largest `oldText`/`newText` kept per diff, in Unicode scalar values.
-pub const TEXT_LIMIT_SCALARS: usize = 32_768;
-/// Content entries inspected per update; any beyond make every diff incomplete.
-pub const CONTENT_LIMIT: usize = 100;
-/// Appended to bounded text so a reader sees that the excerpt is shortened.
-const TRUNCATION_MARKER: &str = "\n[...]";
-
-/// One normalized diff of a tool update, as stored by both platforms.
-#[derive(Clone, Debug, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct DiffEvidence {
-    /// Path exactly as the Agent reported it; platforms resolve it in the workspace.
-    pub path: String,
-    /// Previous text, or `None` when the Agent reported none (insertion or creation).
-    pub old_text: Option<String>,
-    /// Reported text after the edit; empty when the Agent omitted it.
-    pub new_text: String,
-    /// Explicit upstream operation (`add`, `delete`, `update`), never inferred.
-    pub operation: Option<String>,
-    /// Upstream-reported added lines; `None` when the Agent did not report them.
-    pub additions: Option<u64>,
-    /// Upstream-reported removed lines; `None` when the Agent did not report them.
-    pub deletions: Option<u64>,
-    /// The texts are not a complete copy of what the Agent changed.
-    pub truncated: bool,
-    /// The evidence alone is sufficient to plan a rollback of this diff.
-    pub revertible: bool,
-}
-
-/// Adds `_meta.lithe.diffs` to a `tool_call` or `tool_call_update` that restates
-/// its diffs. Updates without diff information are left untouched, so platforms
-/// keep earlier evidence exactly when the Agent sent none.
-pub fn annotate(update: &mut Value) {
-    if !matches!(
-        update["sessionUpdate"].as_str(),
-        Some("tool_call" | "tool_call_update")
-    ) {
-        return;
-    }
-    let Some(diffs) = evidence(update) else {
-        return;
-    };
-    let Ok(diffs) = serde_json::to_value(diffs) else {
-        return;
-    };
-    if !update["_meta"].is_object() {
-        update["_meta"] = json!({});
-    }
-    if !update["_meta"]["lithe"].is_object() {
-        update["_meta"]["lithe"] = json!({});
-    }
-    update["_meta"]["lithe"]["diffs"] = diffs;
-}
-
-/// Diff evidence an update determines, or `None` when it carries no diff information.
-pub fn evidence(update: &Value) -> Option<Vec<DiffEvidence>> {
-    let content = update["content"].as_array();
-    let reported = content.map(|content| content_diffs(content));
-    if let Some(written) = claude_write(update, reported.as_deref()) {
-        return Some(vec![written]);
-    }
-    reported
-}
-
-fn content_diffs(content: &[Value]) -> Vec<DiffEvidence> {
-    let overflow = content.len() > CONTENT_LIMIT;
-    content
-        .iter()
-        .take(CONTENT_LIMIT)
-        .filter(|entry| entry["type"] == "diff")
-        .filter_map(|entry| {
-            let path = entry["path"].as_str()?;
-            let old = entry["oldText"].as_str();
-            let new = entry["newText"].as_str();
-            let operation = entry["_meta"]["kind"].as_str().map(str::to_owned);
-            let stats = &entry["_meta"]["jetbrains"]["air"]["diffStats"];
-            let stats_valid = stats["version"].as_i64() == Some(1);
-            let stat = |key: &str| stats_valid.then(|| stats[key].as_u64()).flatten();
-            let truncated = overflow
-                || new.is_none()
-                || entry["isTruncated"].as_bool() == Some(true)
-                || old.is_some_and(exceeds_limit)
-                || new.is_some_and(exceeds_limit);
-            Some(diff(
-                path,
-                old,
-                new.unwrap_or(""),
-                operation,
-                (stat("added"), stat("removed")),
-                truncated,
-            ))
-        })
-        .collect()
-}
-
-/// The pinned Claude adapter forwards the SDK's public `FileWriteOutput`. Its
-/// complete text replaces newline-less hunks, and its explicit `create` type is
-/// the only proof that a null previous text means file creation.
-fn claude_write(update: &Value, reported: Option<&[DiffEvidence]>) -> Option<DiffEvidence> {
-    let claude = &update["_meta"]["claudeCode"];
-    if claude["toolName"] != "Write" {
-        return None;
-    }
-    let response = &claude["toolResponse"];
-    let path = response["filePath"]
-        .as_str()
-        .filter(|path| !path.is_empty())?;
-    let new = response["content"].as_str()?;
-    let old = response["originalFile"].as_str();
-    let operation = match response["type"].as_str()? {
-        "create" => "add",
-        "update" if old.is_some() => "update",
-        _ => return None,
-    };
-    let old = (operation == "update").then_some(old).flatten();
-    // Statistics stay upstream-scoped: only complete hunks of the same update
-    // may describe the whole write.
-    let hunks: Vec<&DiffEvidence> = reported
-        .unwrap_or_default()
-        .iter()
-        .filter(|diff| diff.path == path)
-        .collect();
-    let complete = !hunks.iter().any(|diff| diff.truncated);
-    let total = |field: fn(&DiffEvidence) -> Option<u64>| {
-        if !complete || hunks.is_empty() {
-            return None;
-        }
-        hunks
-            .iter()
-            .try_fold(0u64, |sum, diff| sum.checked_add(field(diff)?))
-    };
-    let stats = (total(|diff| diff.additions), total(|diff| diff.deletions));
-    let truncated = exceeds_limit(new) || old.is_some_and(exceeds_limit);
-    Some(diff(
-        path,
-        old,
-        new,
-        Some(operation.to_owned()),
-        stats,
-        truncated,
-    ))
-}
-
-fn diff(
-    path: &str,
-    old: Option<&str>,
-    new: &str,
-    operation: Option<String>,
-    (additions, deletions): (Option<u64>, Option<u64>),
-    truncated: bool,
-) -> DiffEvidence {
-    let revertible = is_revertible(truncated, old.is_some(), operation.as_deref());
-    DiffEvidence {
-        path: path.to_owned(),
-        old_text: old.map(bounded),
-        new_text: bounded(new),
-        operation,
-        additions,
-        deletions,
-        truncated,
-        revertible,
-    }
-}
-
-/// A null previous text is only reversible with explicit creation metadata,
-/// because some Agents report an inserted excerpt the same way.
-fn is_revertible(truncated: bool, has_old: bool, operation: Option<&str>) -> bool {
-    !truncated && (has_old || operation == Some("add"))
-}
-
-fn exceeds_limit(text: &str) -> bool {
-    text.chars().nth(TEXT_LIMIT_SCALARS).is_some()
-}
-
-fn bounded(text: &str) -> String {
-    match text.char_indices().nth(TEXT_LIMIT_SCALARS) {
-        Some((end, _)) => format!("{}{TRUNCATION_MARKER}", &text[..end]),
-        None => text.to_owned(),
-    }
-}
-
-/// Payload of `agent.edits.reversePlan`: one file's evidence plus its disk text.
-#[derive(Clone, Debug, Deserialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct ReverseRequest {
-    /// Evidence in tool execution order; the newest diff is reversed first.
-    pub diffs: Vec<ReverseDiff>,
-    /// Some tool that touched the file has not completed yet.
-    #[serde(default)]
-    pub pending: bool,
-    /// Some tool touched the file without diff evidence, or moved it.
-    #[serde(default)]
-    pub missing_evidence: bool,
-    /// Current decoded disk text, or `None` when the file does not exist.
-    pub disk: Option<String>,
-}
-
-/// One diff of [`ReverseRequest`], as stored from [`DiffEvidence`].
-#[derive(Clone, Debug, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ReverseDiff {
-    /// Previous text; `None` without creation metadata is not reversible.
-    pub old_text: Option<String>,
-    /// Reported text after the edit.
-    pub new_text: String,
-    /// Explicit upstream operation of the diff.
-    #[serde(default)]
-    pub operation: Option<String>,
-    /// ACP `kind` of the tool that reported the diff. A `delete` tool marks an
-    /// operation-less diff as a deletion.
-    #[serde(default)]
-    pub tool_kind: Option<String>,
-    /// The diff texts are incomplete.
-    pub truncated: bool,
-}
-
-/// What the platform must do to reverse one file's Agent edits.
-#[derive(Clone, Debug, PartialEq, Eq, Serialize)]
-#[serde(tag = "action", rename_all = "camelCase")]
-pub enum ReversePlan {
-    /// Write `text` with the platform's guarded write, keeping the disk encoding.
-    Write {
-        /// Restored text, in the disk's dominant line ending where text was matched.
-        text: String,
-    },
-    /// Move the existing file to recoverable Trash; it did not exist before.
-    Trash,
-    /// The disk already matches the state before the edits.
-    None,
-    /// Rollback is unsafe; nothing may be written.
-    Conflict {
-        /// Stable reason code, localized by the platform.
-        reason: ConflictReason,
-    },
-}
-
-/// Stable rollback conflict codes.
-#[derive(Clone, Copy, Debug, PartialEq, Eq, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub enum ConflictReason {
-    /// The evidence is pending, missing, truncated or lacks original content.
-    Incomplete,
-    /// The disk no longer matches the evidence (edited, missing or ambiguous).
-    Changed,
-}
-
-/// Plans a rollback of one file's edits, newest first.
-///
-/// Matching tolerates LF evidence against CRLF files: ACP diffs carry LF while
-/// a document read keeps the disk's line endings. Only the matched span is
-/// rewritten, in the disk's dominant line ending, so unrelated lines keep theirs.
-pub fn reverse_plan(request: &ReverseRequest) -> ReversePlan {
-    let conflict = |reason| ReversePlan::Conflict { reason };
-    let eligible = !request.pending
-        && !request.missing_evidence
-        && !request.diffs.is_empty()
-        && request.diffs.iter().all(|diff| {
-            is_revertible(
-                diff.truncated,
-                diff.old_text.is_some(),
-                diff.operation.as_deref(),
-            )
-        });
-    if !eligible {
-        return conflict(ConflictReason::Incomplete);
-    }
-    let mut restored = request.disk.clone();
-    for diff in request.diffs.iter().rev() {
-        let deletion = match diff.operation.as_deref() {
-            Some(operation) => operation == "delete",
-            None => diff.tool_kind.as_deref() == Some("delete"),
-        };
-        restored = match (deletion, diff.old_text.as_deref(), restored) {
-            // A deleted file is restored only while its path is still free.
-            (true, Some(old), None) => Some(old.to_owned()),
-            (true, _, _) => return conflict(ConflictReason::Changed),
-            // Creation: remove only the exact created content.
-            (false, None, Some(current))
-                if canonical(&current).0 == canonical(&diff.new_text).0 =>
-            {
-                None
-            }
-            (false, None, _) => return conflict(ConflictReason::Changed),
-            (false, Some(old), Some(current)) => {
-                match unique_replacement(&current, &diff.new_text, old) {
-                    Some(text) => Some(text),
-                    None => return conflict(ConflictReason::Changed),
-                }
-            }
-            (false, Some(_), None) => return conflict(ConflictReason::Changed),
-        };
-    }
-    match (restored, request.disk.as_deref()) {
-        (None, None) => ReversePlan::None,
-        (None, Some(_)) => ReversePlan::Trash,
-        (Some(text), Some(disk)) if text == disk => ReversePlan::None,
-        (Some(text), _) => ReversePlan::Write { text },
-    }
-}
-
-/// Replaces exactly one occurrence of `new` in `current` with `old`.
-/// Complete snapshots match verbatim; excerpts must be nonempty and unambiguous,
-/// including overlapping occurrences.
-fn unique_replacement(current: &str, new: &str, old: &str) -> Option<String> {
-    if current == new {
-        return Some(old.to_owned());
-    }
-    if new.is_empty() {
-        return None;
-    }
-    let ending = dominant_line_ending(current);
-    let disk_new = with_line_ending(new, ending);
-    let disk_old = with_line_ending(old, ending);
-    if let Some(start) = unique_occurrence(current, &disk_new)? {
-        return Some(splice(current, start, start + disk_new.len(), &disk_old));
-    }
-    // Mixed line endings defeat the exact match; compare canonically and map
-    // the matched span back to original byte offsets.
-    let (canonical_current, offsets) = canonical(current);
-    let canonical_new = canonical(new).0;
-    let start = unique_occurrence(&canonical_current, &canonical_new)??;
-    let end = start + canonical_new.len();
-    let original = |index: usize| offsets.get(index).copied().unwrap_or(current.len());
-    Some(splice(current, original(start), original(end), &disk_old))
-}
-
-/// `Some(Some(index))` for one match, `Some(None)` for none, `None` for several.
-fn unique_occurrence(haystack: &str, needle: &str) -> Option<Option<usize>> {
-    let Some(first) = haystack.find(needle) else {
-        return Some(None);
-    };
-    // Resume one character later so overlapping repeats count as ambiguous.
-    let next = first + haystack[first..].chars().next().map_or(1, char::len_utf8);
-    if haystack[next..].contains(needle) {
-        None
-    } else {
-        Some(Some(first))
-    }
-}
-
-fn splice(text: &str, start: usize, end: usize, replacement: &str) -> String {
-    format!("{}{replacement}{}", &text[..start], &text[end..])
-}
-
-/// LF-normalized text plus, per canonical byte, its original byte offset.
-fn canonical(text: &str) -> (String, Vec<usize>) {
-    let mut normalized = String::with_capacity(text.len());
-    let mut offsets = Vec::with_capacity(text.len());
-    let bytes = text.as_bytes();
-    let mut index = 0;
-    while index < bytes.len() {
-        if bytes[index] == b'\r' {
-            offsets.push(index);
-            normalized.push('\n');
-            index += if bytes.get(index + 1) == Some(&b'\n') {
-                2
-            } else {
-                1
-            };
-            continue;
-        }
-        let character = text[index..].chars().next().unwrap_or_default();
-        for _ in 0..character.len_utf8() {
-            offsets.push(index);
-        }
-        normalized.push(character);
-        index += character.len_utf8();
-    }
-    (normalized, offsets)
-}
-
-fn dominant_line_ending(text: &str) -> &'static str {
-    if text.contains("\r\n") {
-        "\r\n"
-    } else {
-        "\n"
-    }
-}
-
-fn with_line_ending(text: &str, ending: &str) -> String {
-    let normalized = canonical(text).0;
-    if ending == "\n" {
-        normalized
-    } else {
-        normalized.replace('\n', ending)
-    }
-}
-
-#[cfg(test)]
-mod tests;
diff --git a/rust/lithe-agent-host/src/edit_review/tests.rs b/rust/lithe-agent-host/src/edit_review/tests.rs
deleted file mode 100644
index 74b49e2d..00000000
--- a/rust/lithe-agent-host/src/edit_review/tests.rs
+++ /dev/null
@@ -1,131 +0,0 @@
-use super::*;
-
-fn fixture() -> Value {
-    serde_json::from_str(include_str!("../../../fixtures/agent/edit-review-v1.json"))
-        .expect("edit review fixture is JSON")
-}
-
-/// Expands `{repeat, count, suffix?}` text generators used by the shared fixture.
-fn expand(value: &Value) -> Value {
-    match value {
-        Value::Object(object) if object.contains_key("repeat") => {
-            let unit = object["repeat"].as_str().expect("repeat text");
-            let count = object["count"].as_u64().expect("repeat count") as usize;
-            let suffix = object.get("suffix").and_then(Value::as_str).unwrap_or("");
-            Value::String(unit.repeat(count) + suffix)
-        }
-        Value::Object(object) => Value::Object(
-            object
-                .iter()
-                .map(|(key, value)| (key.clone(), expand(value)))
-                .collect(),
-        ),
-        Value::Array(items) => Value::Array(items.iter().map(expand).collect()),
-        other => other.clone(),
-    }
-}
-
-#[test]
-fn shared_evidence_fixture_matches_host_annotation() {
-    let fixture = fixture();
-    assert_eq!(fixture["textLimitScalars"], TEXT_LIMIT_SCALARS);
-    assert_eq!(fixture["contentLimit"], CONTENT_LIMIT);
-    for case in fixture["evidence"].as_array().expect("evidence cases") {
-        let name = case["name"].as_str().unwrap_or_default();
-        let mut update = expand(&case["update"]);
-        let original = update.clone();
-        annotate(&mut update);
-        let expected = expand(&case["expected"]);
-        if expected.is_null() {
-            assert_eq!(update, original, "{name}: update must stay untouched");
-        } else {
-            assert_eq!(update["_meta"]["lithe"]["diffs"], expected, "{name}");
-            // Annotation adds evidence without rewriting the raw ACP fields.
-            assert_eq!(update["content"], original["content"], "{name}");
-        }
-    }
-}
-
-#[test]
-fn shared_reverse_plan_fixture_matches_planner() {
-    let fixture = fixture();
-    for case in fixture["reversePlan"]
-        .as_array()
-        .expect("reverse plan cases")
-    {
-        let name = case["name"].as_str().unwrap_or_default();
-        let request: ReverseRequest = serde_json::from_value(expand(&case["request"])).expect(name);
-        let plan = serde_json::to_value(reverse_plan(&request)).expect(name);
-        assert_eq!(plan, expand(&case["expected"]), "{name}");
-    }
-}
-
-#[test]
-fn content_beyond_the_entry_limit_marks_every_diff_incomplete() {
-    let mut content =
-        vec![json!({"type": "diff", "path": "a.txt", "oldText": "a", "newText": "b"})];
-    content.extend(
-        (0..CONTENT_LIMIT)
-            .map(|_| json!({"type": "content", "content": {"type": "text", "text": "x"}})),
-    );
-    let diffs =
-        evidence(&json!({"sessionUpdate": "tool_call", "content": content})).expect("diffs");
-    assert_eq!(diffs.len(), 1);
-    assert!(diffs[0].truncated && !diffs[0].revertible);
-}
-
-#[test]
-fn existing_lithe_metadata_is_preserved() {
-    let mut update = json!({
-        "sessionUpdate": "tool_call_update",
-        "content": [{"type": "diff", "path": "a.txt", "oldText": "a", "newText": "b"}],
-        "_meta": {"lithe": {"claudeDesktop": {"kind": "card"}}, "other": 1}
-    });
-    annotate(&mut update);
-    assert_eq!(update["_meta"]["lithe"]["claudeDesktop"]["kind"], "card");
-    assert_eq!(update["_meta"]["other"], 1);
-    assert_eq!(update["_meta"]["lithe"]["diffs"][0]["newText"], "b");
-}
-
-#[test]
-fn canonical_match_maps_multibyte_offsets_back_to_the_original() {
-    // A lone CR and multibyte text before the match must not shift the span.
-    let request = ReverseRequest {
-        diffs: vec![ReverseDiff {
-            old_text: Some("旧\n".into()),
-            new_text: "新\n".into(),
-            operation: None,
-            tool_kind: None,
-            truncated: false,
-        }],
-        pending: false,
-        missing_evidence: false,
-        disk: Some("😀\r前\r\n新\n后".into()),
-    };
-    assert_eq!(
-        reverse_plan(&request),
-        ReversePlan::Write {
-            text: "😀\r前\r\n旧\r\n后".into()
-        }
-    );
-}
-
-#[test]
-fn presented_acp_fixture_edits_carry_host_evidence() {
-    // The platform event fixture shows presented updates; removing the Host
-    // annotation and presenting again must reproduce them exactly.
-    let fixture: Value =
-        serde_json::from_str(include_str!("../../../fixtures/agent/acp-events-v1.json"))
-            .expect("ACP event fixture is JSON");
-    for name in ["fileEdit", "claudeFileCreated", "claudeFileWriteUpdated"] {
-        let presented = &fixture["events"][name]["update"];
-        let mut raw = presented.clone();
-        let meta = raw["_meta"].as_object_mut().expect("annotated metadata");
-        meta.remove("lithe");
-        if meta.is_empty() {
-            raw.as_object_mut().expect("update").remove("_meta");
-        }
-        annotate(&mut raw);
-        assert_eq!(&raw, presented, "{name}");
-    }
-}
diff --git a/rust/lithe-agent-host/src/environment.rs b/rust/lithe-agent-host/src/environment.rs
deleted file mode 100644
index 79498ae4..00000000
--- a/rust/lithe-agent-host/src/environment.rs
+++ /dev/null
@@ -1,565 +0,0 @@
-//! Detection of the user-installed runtime that npm-distributed agents need.
-//!
-//! Lithe never installs Node.js; it only reports what it finds. GUI apps on
-//! macOS do not inherit the login shell's `PATH`, so version managers such as
-//! nvm or fnm are invisible unless the shell is asked for its `PATH`.
-
-use std::ffi::OsString;
-use std::io::{BufRead, BufReader, Read};
-use std::path::{Path, PathBuf};
-use std::process::{Command, Stdio};
-use std::sync::Mutex;
-use std::time::{Duration, Instant};
-
-use serde::Serialize;
-
-const SHELL_TIMEOUT: Duration = Duration::from_secs(10);
-const VERSION_TIMEOUT: Duration = Duration::from_secs(10);
-const POLL_INTERVAL: Duration = Duration::from_millis(50);
-/// How long to wait for output after the child exited or was killed.
-const OUTPUT_GRACE: Duration = Duration::from_secs(2);
-const PATH_START: &str = "__LITHE_PATH_START__";
-const PATH_END: &str = "__LITHE_PATH_END__";
-
-/// Most recent search path, refreshed by [`detect`] and reused by launches.
-static SEARCH_PATH: Mutex<Option<OsString>> = Mutex::new(None);
-
-/// A tool found on the search path.
-#[derive(Clone, Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct DetectedTool {
-    pub version: String,
-    pub path: PathBuf,
-}
-
-/// Node.js and npm as seen by agent launches and installs.
-#[derive(Clone, Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct RuntimeEnvironment {
-    pub node: Option<DetectedTool>,
-    pub npm: Option<DetectedTool>,
-    /// Whether the login shell reported a `PATH`; false means only the app's
-    /// own `PATH` was searched.
-    pub used_login_shell: bool,
-}
-
-impl RuntimeEnvironment {
-    /// Major version of the detected Node.js, e.g. 22 for `v22.3.1`.
-    pub fn node_major(&self) -> Option<u32> {
-        self.node
-            .as_ref()
-            .and_then(|node| parse_major(&node.version))
-    }
-}
-
-/// Failure of a bounded child process.
-#[derive(Debug, PartialEq, Eq)]
-pub(crate) enum RunError {
-    Start(String),
-    TimedOut,
-    Cancelled,
-}
-
-/// Detect Node.js and npm, refreshing the cached search path.
-pub fn detect(cancel: &dyn Fn() -> bool) -> RuntimeEnvironment {
-    let shell_path = login_shell_path(cancel);
-    let used_login_shell = shell_path.is_some();
-    let path = merge_paths(shell_path, std::env::var_os("PATH"));
-    if let Ok(mut cached) = SEARCH_PATH.lock() {
-        *cached = path.clone();
-    }
-    let tool = |name: &str| {
-        let executable = find_executable(name, path.as_deref())?;
-        let version = tool_version(&executable, path.as_deref(), cancel)?;
-        Some(DetectedTool {
-            version,
-            path: executable,
-        })
-    };
-    RuntimeEnvironment {
-        node: tool("node"),
-        npm: tool("npm"),
-        used_login_shell,
-    }
-}
-
-/// Search path for launching agents, detecting it on first use.
-pub fn search_path() -> Option<OsString> {
-    search_path_with_cancel(&|| false)
-}
-
-/// Search path for launching agents while allowing first-use detection to stop.
-pub fn search_path_with_cancel(cancel: &dyn Fn() -> bool) -> Option<OsString> {
-    if let Some(path) = SEARCH_PATH.lock().ok().and_then(|cached| cached.clone()) {
-        return Some(path);
-    }
-    // Launches only need PATH. Probing node/npm versions here can delay even a
-    // missing custom executable by VERSION_TIMEOUT for each installed tool.
-    let path = merge_paths(login_shell_path(cancel), std::env::var_os("PATH"));
-    if let Ok(mut cached) = SEARCH_PATH.lock() {
-        *cached = path.clone();
-    }
-    path
-}
-
-/// `PATH` reported by the user's interactive login shell (Unix only).
-fn login_shell_path(cancel: &dyn Fn() -> bool) -> Option<OsString> {
-    if cfg!(windows) {
-        return None;
-    }
-    let shell = std::env::var_os("SHELL")
-        .filter(|shell| !shell.is_empty())
-        .unwrap_or_else(|| OsString::from("/bin/sh"));
-    let is_fish = Path::new(&shell)
-        .file_name()
-        .is_some_and(|name| name == "fish");
-    // Markers separate the value from greetings printed by shell startup files.
-    let script = if is_fish {
-        format!("printf '{PATH_START}%s{PATH_END}' (string join : $PATH)")
-    } else {
-        format!("printf '{PATH_START}%s{PATH_END}' \"$PATH\"")
-    };
-    let mut command = Command::new(&shell);
-    command.args(["-i", "-l", "-c", &script]);
-    let output = run_bounded(command, SHELL_TIMEOUT, cancel).ok()?;
-    parse_marked_path(&output)
-}
-
-fn parse_marked_path(output: &str) -> Option<OsString> {
-    let start = output.rfind(PATH_START)? + PATH_START.len();
-    let end = start + output[start..].find(PATH_END)?;
-    let path = output[start..end].trim();
-    (!path.is_empty()).then(|| OsString::from(path))
-}
-
-/// Shell entries first, then the app's own entries not already present.
-fn merge_paths(first: Option<OsString>, second: Option<OsString>) -> Option<OsString> {
-    let mut entries: Vec<PathBuf> = Vec::new();
-    for path in [first, second].into_iter().flatten() {
-        for entry in std::env::split_paths(&path) {
-            if !entry.as_os_str().is_empty() && !entries.contains(&entry) {
-                entries.push(entry);
-            }
-        }
-    }
-    (!entries.is_empty())
-        .then(|| std::env::join_paths(entries).ok())
-        .flatten()
-}
-
-/// First `name` executable on `path`; on Windows also `name.cmd` and `name.exe`.
-pub(crate) fn find_executable(name: &str, path: Option<&std::ffi::OsStr>) -> Option<PathBuf> {
-    let candidates: &[&str] = if cfg!(windows) {
-        &[".exe", ".cmd", ""]
-    } else {
-        &[""]
-    };
-    std::env::split_paths(path?).find_map(|directory| {
-        candidates
-            .iter()
-            .map(|suffix| directory.join(format!("{name}{suffix}")))
-            .find(|candidate| is_executable(candidate))
-    })
-}
-
-fn is_executable(path: &Path) -> bool {
-    let Ok(metadata) = std::fs::metadata(path) else {
-        return false;
-    };
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::PermissionsExt;
-        metadata.is_file() && metadata.permissions().mode() & 0o111 != 0
-    }
-    #[cfg(not(unix))]
-    {
-        metadata.is_file()
-    }
-}
-
-fn tool_version(
-    executable: &Path,
-    path: Option<&std::ffi::OsStr>,
-    cancel: &dyn Fn() -> bool,
-) -> Option<String> {
-    let mut command = Command::new(executable);
-    command.arg("--version");
-    if let Some(path) = path {
-        command.env("PATH", path);
-    }
-    let output = run_bounded(command, VERSION_TIMEOUT, cancel).ok()?;
-    let line = output
-        .lines()
-        .map(str::trim)
-        .find(|line| !line.is_empty())?;
-    // `v22.3.1`, `10.2.4`, or a named banner such as `codex-cli 0.156.1`.
-    let version = line
-        .split_whitespace()
-        .map(|token| token.trim_start_matches('v'))
-        .find(|token| token.starts_with(|c: char| c.is_ascii_digit()))
-        .unwrap_or(line);
-    Some(version.to_owned())
-}
-
-/// Find `command` on the agent search path and read its version.
-pub fn detect_tool(command: &str, cancel: &dyn Fn() -> bool) -> Option<DetectedTool> {
-    let path = search_path_with_cancel(cancel);
-    let executable = find_executable(command, path.as_deref())?;
-    let version = tool_version(&executable, path.as_deref(), cancel)?;
-    Some(DetectedTool {
-        version,
-        path: executable,
-    })
-}
-
-/// Whether dotted `version` is at least `minimum`, comparing numeric parts;
-/// pre-release suffixes such as `-alpha.1` are ignored.
-pub fn version_at_least(version: &str, minimum: &str) -> bool {
-    let parts = |value: &str| -> Vec<u64> {
-        value
-            .trim()
-            .trim_start_matches('v')
-            .split(['-', '+'])
-            .next()
-            .unwrap_or_default()
-            .split('.')
-            .map(|part| part.parse().unwrap_or(0))
-            .collect()
-    };
-    let (version, minimum) = (parts(version), parts(minimum));
-    for index in 0..version.len().max(minimum.len()) {
-        let (left, right) = (
-            version.get(index).copied().unwrap_or(0),
-            minimum.get(index).copied().unwrap_or(0),
-        );
-        if left != right {
-            return left > right;
-        }
-    }
-    true
-}
-
-/// Confirm strict SemVer precedence; malformed versions remain unknown and build metadata is ignored.
-pub(crate) fn newer_version_available(installed: &str, target: &str) -> Option<bool> {
-    let parse = |value: &str| semver::Version::parse(value.trim().trim_start_matches('v')).ok();
-    Some(parse(target)?.cmp_precedence(&parse(installed)?).is_gt())
-}
-
-/// Major version of `22.3.1` or `v22.3.1`.
-pub fn parse_major(version: &str) -> Option<u32> {
-    version
-        .trim()
-        .trim_start_matches('v')
-        .split('.')
-        .next()?
-        .parse()
-        .ok()
-}
-
-/// Run a child to completion within `timeout`, returning combined output.
-///
-/// Output is collected on reader threads so a chatty child cannot block on a
-/// full pipe. The child is killed on timeout or cancellation.
-pub(crate) fn run_bounded(
-    mut command: Command,
-    timeout: Duration,
-    cancel: &dyn Fn() -> bool,
-) -> Result<String, RunError> {
-    let (status, output) = run_bounded_status(&mut command, timeout, cancel)?;
-    if status {
-        Ok(output)
-    } else {
-        Err(RunError::Start(output))
-    }
-}
-
-/// Like [`run_bounded`], but returns whether the child succeeded with its output.
-pub(crate) fn run_bounded_status(
-    command: &mut Command,
-    timeout: Duration,
-    cancel: &dyn Fn() -> bool,
-) -> Result<(bool, String), RunError> {
-    run_bounded_status_observed(command, timeout, cancel, &mut |_| {})
-}
-
-/// Streams bounded output lines on the caller thread while retaining a diagnostic tail.
-/// Observers must not block; their lifetime ends before this function returns.
-pub(crate) fn run_bounded_status_observed(
-    command: &mut Command,
-    timeout: Duration,
-    cancel: &dyn Fn() -> bool,
-    observe: &mut dyn FnMut(&str),
-) -> Result<(bool, String), RunError> {
-    run_bounded_streams(command, timeout, cancel, observe, false)
-        .map(|(success, output, _)| (success, output))
-}
-
-/// Capture structured stdout separately from bounded stderr diagnostics.
-pub(crate) fn run_bounded_status_separated(
-    command: &mut Command,
-    timeout: Duration,
-    cancel: &dyn Fn() -> bool,
-) -> Result<(bool, String, String), RunError> {
-    run_bounded_streams(command, timeout, cancel, &mut |_| {}, true)
-}
-
-fn run_bounded_streams(
-    command: &mut Command,
-    timeout: Duration,
-    cancel: &dyn Fn() -> bool,
-    observe: &mut dyn FnMut(&str),
-    separate_stderr: bool,
-) -> Result<(bool, String, String), RunError> {
-    command
-        .stdin(Stdio::null())
-        .stdout(Stdio::piped())
-        .stderr(Stdio::piped());
-    #[cfg(unix)]
-    {
-        use std::os::unix::process::CommandExt;
-        // Keep the child in its own group so a terminal-reading shell cannot
-        // stop Lithe with SIGTTIN, and so the whole tree can be killed.
-        command.process_group(0);
-    }
-    #[cfg(windows)]
-    {
-        use std::os::windows::process::CommandExt;
-        // Every bounded probe (`node --version`, `npm.cmd`, CLI update checks)
-        // is a console program started by a GUI host; without this flag each
-        // one opens a visible console window while the Agent panel loads.
-        command.creation_flags(crate::CREATE_NO_WINDOW);
-    }
-    let mut child = command
-        .spawn()
-        .map_err(|error| RunError::Start(error.to_string()))?;
-    let (output_tx, output_rx) = std::sync::mpsc::sync_channel::<(usize, Option<Vec<u8>>)>(32);
-    let readers: Vec<_> = [
-        child
-            .stdout
-            .take()
-            .map(|p| Box::new(p) as Box<dyn std::io::Read + Send>),
-        child
-            .stderr
-            .take()
-            .map(|p| Box::new(p) as Box<dyn std::io::Read + Send>),
-    ]
-    .into_iter()
-    .enumerate()
-    .filter_map(|(stream, pipe)| pipe.map(|pipe| (stream, pipe)))
-    .map(|(stream, pipe)| {
-        let sender = output_tx.clone();
-        std::thread::spawn(move || {
-            let mut reader = BufReader::new(pipe);
-            // Bound individual lines even if a child never writes a newline.
-            loop {
-                let mut bytes = Vec::new();
-                let read = std::io::Read::by_ref(&mut reader)
-                    .take(8192)
-                    .read_until(b'\n', &mut bytes);
-                match read {
-                    Ok(0) | Err(_) => break,
-                    Ok(_) if sender.send((stream, Some(bytes))).is_err() => return,
-                    _ => {}
-                }
-            }
-            // log-exempt: 用户取消：命令调用方已结束输出收集并关闭接收通道，放弃等待 reader 完成通知。
-            let _ = sender.send((stream, None));
-        })
-    })
-    .collect();
-    let reader_count = readers.len();
-    drop(output_tx);
-    let mut outputs = [String::new(), String::new()];
-    let ended = std::cell::Cell::new(0);
-    let mut collect = |(stream, event): (usize, Option<Vec<u8>>)| {
-        if let Some(bytes) = event {
-            let text = String::from_utf8_lossy(&bytes);
-            observe(&text);
-            let output = &mut outputs[if separate_stderr { stream } else { 0 }];
-            output.push_str(&text);
-            if output.len() > 65536 {
-                let mut first = output.len() - 65536;
-                while !output.is_char_boundary(first) {
-                    first += 1;
-                }
-                output.drain(..first);
-            }
-        } else {
-            ended.set(ended.get() + 1);
-        }
-    };
-    let deadline = Instant::now() + timeout;
-    let outcome = loop {
-        // A chatty process must not starve cancellation or its deadline.
-        for _ in 0..32 {
-            match output_rx.try_recv() {
-                Ok(event) => collect(event),
-                Err(_) => break,
-            }
-        }
-        match child.try_wait() {
-            Ok(Some(status)) => break Ok(status.success()),
-            Ok(None) if cancel() => break Err(RunError::Cancelled),
-            Ok(None) if Instant::now() >= deadline => break Err(RunError::TimedOut),
-            Ok(None) => std::thread::sleep(POLL_INTERVAL),
-            Err(error) => break Err(RunError::Start(error.to_string())),
-        }
-    };
-    // Reap the direct child and terminate descendants on every path. A process
-    // that exits successfully can still leave a child holding stdout/stderr.
-    crate::force_kill_tree(child.id());
-    crate::failure_log::io("agent.host.operation_failed", "process_wait", child.wait());
-    // A descendant that escaped the process group can still hold a pipe open;
-    // do not let it block the caller past a short grace period.
-    let output_deadline = Instant::now() + OUTPUT_GRACE;
-    while ended.get() < reader_count {
-        match output_rx.recv_timeout(output_deadline.saturating_duration_since(Instant::now())) {
-            Ok(event) => {
-                collect(event);
-            }
-            Err(_) => break,
-        }
-    }
-    drop(collect);
-    // The process-group cleanup above should close every pipe. Joining keeps
-    // successful, failed, cancelled and timed-out calls from leaking reader
-    // threads; the bounded grace period still protects the caller from a
-    // descendant that deliberately escaped the group.
-    for reader in readers {
-        crate::failure_log::outcome(
-            "agent.host.operation_failed",
-            "reader_join",
-            reader.join(),
-            "panic",
-            "thread",
-        );
-    }
-    let [stdout, stderr] = outputs;
-    outcome.map(|success| (success, stdout, stderr))
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn marked_path_ignores_shell_greetings() {
-        let output = format!("Welcome!\n{PATH_START}/opt/node/bin:/usr/bin{PATH_END}\nbye");
-        assert_eq!(
-            parse_marked_path(&output),
-            Some(OsString::from("/opt/node/bin:/usr/bin"))
-        );
-        assert_eq!(parse_marked_path("no markers"), None);
-        assert_eq!(parse_marked_path(&format!("{PATH_START}{PATH_END}")), None);
-    }
-
-    #[test]
-    fn merged_path_keeps_shell_order_without_duplicates() {
-        let merged = merge_paths(
-            Some(std::env::join_paths(["/shell/bin", "/usr/bin"]).unwrap()),
-            Some(std::env::join_paths(["/usr/bin", "/app/bin"]).unwrap()),
-        )
-        .unwrap();
-        let entries: Vec<PathBuf> = std::env::split_paths(&merged).collect();
-        assert_eq!(
-            entries,
-            [
-                PathBuf::from("/shell/bin"),
-                "/usr/bin".into(),
-                "/app/bin".into()
-            ]
-        );
-        assert_eq!(merge_paths(None, None), None);
-    }
-
-    #[test]
-    fn versions_compare_numerically() {
-        assert!(version_at_least("0.156.1", "0.156.0"));
-        assert!(version_at_least("0.160.0", "0.156.0"));
-        assert!(version_at_least("1.0.0", "0.156.0"));
-        assert!(!version_at_least("0.99.9", "0.156.0"));
-        assert!(!version_at_least("0.155.9-alpha.1", "0.156.0"));
-        assert!(version_at_least("v22", "22.0.0"));
-    }
-
-    #[test]
-    fn major_versions_parse_with_or_without_prefix() {
-        assert_eq!(parse_major("v22.3.1"), Some(22));
-        assert_eq!(parse_major("20.11.0"), Some(20));
-        assert_eq!(parse_major("latest"), None);
-    }
-
-    #[cfg(unix)]
-    #[test]
-    fn bounded_run_reports_timeout_and_cancellation() {
-        let sleeper = || {
-            let mut command = Command::new("sh");
-            command.args(["-c", "sleep 30"]);
-            command
-        };
-        let started = Instant::now();
-        assert_eq!(
-            run_bounded(sleeper(), Duration::from_millis(200), &|| false),
-            Err(RunError::TimedOut)
-        );
-        assert_eq!(
-            run_bounded(sleeper(), Duration::from_secs(30), &|| true),
-            Err(RunError::Cancelled)
-        );
-        assert!(
-            started.elapsed() < Duration::from_secs(10),
-            "child was killed"
-        );
-        let mut echo = Command::new("sh");
-        echo.args(["-c", "echo out; echo err >&2"]);
-        let output = run_bounded(echo, Duration::from_secs(10), &|| false).unwrap();
-        assert!(output.contains("out") && output.contains("err"));
-        let mut separated = Command::new("sh");
-        separated.args(["-c", "printf out; printf err >&2"]);
-        assert_eq!(
-            run_bounded_status_separated(&mut separated, Duration::from_secs(5), &|| false)
-                .unwrap(),
-            (true, "out".to_string(), "err".to_string())
-        );
-    }
-
-    #[cfg(unix)]
-    #[test]
-    fn parent_exit_closes_descendant_pipes_before_returning() {
-        let mut command = Command::new("sh");
-        command.args(["-c", "(sleep 30) & printf parent; exit 0"]);
-        let started = Instant::now();
-        let output = run_bounded(command, Duration::from_secs(5), &|| false).unwrap();
-        assert!(output.contains("parent"));
-        assert!(
-            started.elapsed() < Duration::from_secs(5),
-            "reader cleanup is bounded"
-        );
-    }
-
-    #[cfg(unix)]
-    #[test]
-    fn executables_are_found_only_when_runnable() {
-        use std::os::unix::fs::PermissionsExt;
-        let directory = std::env::temp_dir().join(format!("lithe-env-{}", std::process::id()));
-        std::fs::create_dir_all(&directory).unwrap();
-        let tool = directory.join("lithe-tool");
-        std::fs::write(&tool, "#!/bin/sh\necho lithe-tool v1.2.3\n").unwrap();
-        let path = OsString::from(directory.as_os_str());
-        assert_eq!(
-            find_executable("lithe-tool", Some(&path)),
-            None,
-            "not executable yet"
-        );
-        std::fs::set_permissions(&tool, std::fs::Permissions::from_mode(0o755)).unwrap();
-        assert_eq!(
-            find_executable("lithe-tool", Some(&path)),
-            Some(tool.clone())
-        );
-        assert_eq!(
-            tool_version(&tool, Some(&path), &|| false).as_deref(),
-            Some("1.2.3")
-        );
-        let _ = std::fs::remove_dir_all(&directory);
-    }
-}
diff --git a/rust/lithe-agent-host/src/failure_log.rs b/rust/lithe-agent-host/src/failure_log.rs
deleted file mode 100644
index fcc06146..00000000
--- a/rust/lithe-agent-host/src/failure_log.rs
+++ /dev/null
@@ -1,283 +0,0 @@
-//! Injected scalar failure facts; the owning Core supplies the only log writer.
-
-use serde_json::{json, Value};
-use std::sync::atomic::{AtomicU64, Ordering};
-use std::sync::OnceLock;
-
-/// Complete catalog surface emitted by this adapter.
-pub const EVENTS: &[&str] = &[
-    "agent.history.prepare_failed",
-    "agent.host.operation_failed",
-    "agent.observation.start_failed",
-    "agent.retry.cleanup_failed",
-    "agent.skills.cleanup_failed",
-];
-
-/// Borrowed scalar fields; callers supply only fixed summaries and stable categories.
-pub type Fields<'a> = &'a [(&'static str, Value)];
-/// Process-owned callback; no file writer or dependency on Core lives here.
-pub type FailureSink = fn(&str, Fields<'_>);
-
-#[derive(Default)]
-struct Hook {
-    sink: OnceLock<FailureSink>,
-    missed: AtomicU64,
-}
-impl Hook {
-    fn install(&self, sink: FailureSink) {
-        self.sink.get_or_init(|| sink);
-    }
-    fn emit(&self, event: &str, fields: Fields<'_>) {
-        if let Some(sink) = self.sink.get() {
-            sink(event, fields);
-        } else {
-            self.missed.fetch_add(1, Ordering::Relaxed);
-        }
-    }
-}
-static HOOK: Hook = Hook {
-    sink: OnceLock::new(),
-    missed: AtomicU64::new(0),
-};
-
-/// First installation wins; repeated installation never resets the callback.
-pub fn install_failure_sink(sink: FailureSink) {
-    HOOK.install(sink);
-}
-/// Failures observed before the owning process installed its sink.
-pub fn uninstalled_count() -> u64 {
-    HOOK.missed.load(Ordering::Relaxed)
-}
-/// No error display text is accepted: only caller-controlled categories cross the hook.
-pub(crate) fn failed(event: &str, stage: &'static str, code: &str, domain: &'static str) {
-    HOOK.failed(event, stage, code, domain);
-}
-impl Hook {
-    fn failed(&self, event: &str, stage: &'static str, code: &str, domain: &'static str) {
-        self.emit(
-            event,
-            &[
-                ("stage", json!(stage)),
-                ("error", json!("Helper operation failed")),
-                ("error_code", json!(code)),
-                ("error_domain", json!(domain)),
-            ],
-        );
-    }
-    fn teardown<T>(&self, event: &str, stage: &'static str, result: std::io::Result<T>) {
-        match result {
-            Ok(_) => {}
-            // log-exempt: 预期的缺失：对端已经断开，没有仍需关闭或传输的连接。
-            Err(error) if disconnected_io(error.kind()) => {}
-            Err(error) => self.failed(event, stage, &format!("{:?}", error.kind()), "io"),
-        }
-    }
-}
-
-/// Connection teardown only reports errors that lose a cleanup result.
-pub(crate) fn teardown<T>(event: &str, stage: &'static str, result: std::io::Result<T>) {
-    HOOK.teardown(event, stage, result);
-}
-
-/// Preserve the stable I/O category without copying paths or error messages.
-pub(crate) fn io<T>(event: &str, stage: &'static str, result: std::io::Result<T>) {
-    if let Err(error) = result {
-        failed(event, stage, &format!("{:?}", error.kind()), "io");
-    }
-}
-/// Observe cleanup without changing the business result; missing artifacts are normal.
-pub(crate) fn cleanup(event: &str, stage: &'static str, result: std::io::Result<()>) {
-    match result {
-        Ok(()) => {}
-        // log-exempt: 预期的缺失：清理对象可能尚未创建或已被并发清理。
-        Err(error) if error.kind() == std::io::ErrorKind::NotFound => {}
-        Err(error) => io::<()>(event, stage, Err(error)),
-    }
-}
-
-/// Classifies non-I/O completion failures without accepting diagnostic text.
-pub(crate) fn outcome<T, E>(
-    event: &str,
-    stage: &'static str,
-    result: Result<T, E>,
-    code: &'static str,
-    domain: &'static str,
-) {
-    if result.is_err() {
-        failed(event, stage, code, domain);
-    }
-}
-
-/// A bounded asynchronous completion has separate deadline and inner failures.
-pub(crate) fn nested<T, D>(
-    event: &str,
-    stage: &'static str,
-    result: Result<Result<T, tokio::task::JoinError>, D>,
-    code: &'static str,
-    domain: &'static str,
-) {
-    match result {
-        Ok(Ok(_)) => {}
-        // log-exempt: 预期的缺失：任务已被关闭流程取消，不存在仍需等待的任务。
-        Ok(Err(error)) if error.is_cancelled() => {}
-        Ok(Err(_)) => failed(event, stage, code, domain),
-        Err(_) => failed(event, stage, "timeout", "deadline"),
-    }
-}
-
-fn disconnected_io(kind: std::io::ErrorKind) -> bool {
-    use std::io::ErrorKind::*;
-    matches!(
-        kind,
-        NotConnected | BrokenPipe | ConnectionReset | ConnectionAborted | UnexpectedEof
-    )
-}
-
-/// Killing an already reaped child has achieved the desired terminal state.
-pub(crate) fn kill(event: &str, stage: &'static str, result: std::io::Result<()>) {
-    match result {
-        Ok(()) => {}
-        // log-exempt: 预期的缺失：进程已经退出或已被回收，没有仍需终止的进程。
-        Err(error) if error.kind() == std::io::ErrorKind::InvalidInput => {}
-        #[cfg(unix)]
-        // log-exempt: 预期的缺失：ESRCH 表示进程已经退出，没有仍需终止的进程。
-        Err(error) if error.raw_os_error() == Some(libc::ESRCH) => {}
-        Err(error) => io::<()>(event, stage, Err(error)),
-    }
-}
-
-/// ACP 2.2 maps both a closed outgoing queue and serialization to InternalError.
-pub(crate) fn cancel_notification(result: Result<(), agent_client_protocol::Error>) {
-    match result {
-        Ok(()) => {}
-        // log-exempt: 预期的缺失：Agent 已退出时取消目标已不存在；ACP 将断连和序列化共用 InternalError，无法可靠区分正常关闭。
-        Err(error) if error.code == agent_client_protocol::ErrorCode::InternalError => {}
-        Err(_) => failed(
-            "agent.host.operation_failed",
-            "cancel_notification",
-            "notification_failed",
-            "acp",
-        ),
-    }
-}
-
-/// Hyper exposes disconnects through flags or a typed I/O source chain.
-pub(crate) fn connection(event: &str, stage: &'static str, result: Result<(), hyper::Error>) {
-    let Err(error) = result else { return };
-    if error.is_closed()
-        || error.is_canceled()
-        || error.is_incomplete_message()
-        || error.is_body_write_aborted()
-    {
-        // log-exempt: 预期的缺失：HTTP 客户端已经关闭连接，没有仍需服务的请求。
-        return;
-    }
-    let mut source = std::error::Error::source(&error);
-    while let Some(cause) = source {
-        if let Some(io) = cause.downcast_ref::<std::io::Error>() {
-            // Preserve the category only, never the upstream diagnostic message.
-            teardown::<()>(event, stage, Err(std::io::Error::from(io.kind())));
-            return;
-        }
-        source = cause.source();
-    }
-    if error.is_user() {
-        failed(event, stage, "handler_failed", "http");
-    }
-    // log-exempt: 预期的缺失：其余连接级错误没有可识别的存活请求，Hyper 未提供能区分客户端提前关闭和异常的类别。
-}
-
-/// Waiting for a killed process preserves I/O categories and orphan deadlines.
-pub(crate) fn process_wait<D>(
-    event: &str,
-    stage: &'static str,
-    result: Result<std::io::Result<std::process::ExitStatus>, D>,
-) {
-    match result {
-        Ok(result) => io(event, stage, result),
-        Err(_) => failed(event, stage, "timeout", "deadline"),
-    }
-}
-
-/// Tree enumeration failures are distinct from an already absent target.
-pub(crate) fn kill_tree(result: kill_tree::Result<kill_tree::Outputs>) {
-    match result {
-        Ok(_) => {}
-        Err(kill_tree::Error::Io(error)) => kill(
-            "agent.host.operation_failed",
-            "process_tree_kill",
-            Err(error),
-        ),
-        #[cfg(unix)]
-        // log-exempt: 预期的缺失：ESRCH 表示进程树的目标已经退出。
-        Err(kill_tree::Error::Unix(error)) if error as i32 == libc::ESRCH => {}
-        Err(_) => failed(
-            "agent.host.operation_failed",
-            "process_tree_kill",
-            "tree_kill_failed",
-            "process",
-        ),
-    }
-}
-
-/// A closed completion channel means the worker has already exited.
-pub(crate) fn worker_stop(result: Result<(), std::sync::mpsc::RecvTimeoutError>) {
-    match result {
-        Ok(()) => {}
-        // log-exempt: 预期的缺失：完成通道已关闭，worker 已经退出，不存在仍需停止的 worker。
-        Err(std::sync::mpsc::RecvTimeoutError::Disconnected) => {}
-        Err(std::sync::mpsc::RecvTimeoutError::Timeout) => failed(
-            "agent.host.operation_failed",
-            "worker_stop",
-            "timeout",
-            "deadline",
-        ),
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    #[test]
-    fn teardown_filters_disconnects_but_reports_permission_denied() {
-        use std::io::{Error, ErrorKind};
-        static EMITTED: AtomicU64 = AtomicU64::new(0);
-        let hook = Hook::default();
-        hook.install(|event, fields| {
-            assert_eq!(event, EVENTS[0]);
-            assert!(fields
-                .iter()
-                .any(|(key, value)| *key == "error_code" && value == "PermissionDenied"));
-            EMITTED.fetch_add(1, Ordering::Relaxed);
-        });
-        for kind in [
-            ErrorKind::NotConnected,
-            ErrorKind::BrokenPipe,
-            ErrorKind::ConnectionReset,
-            ErrorKind::ConnectionAborted,
-            ErrorKind::UnexpectedEof,
-        ] {
-            hook.teardown::<()>(EVENTS[0], "test", Err(Error::from(kind)));
-        }
-        assert_eq!(EMITTED.load(Ordering::Relaxed), 0);
-        hook.teardown::<()>(
-            EVENTS[0],
-            "test",
-            Err(Error::from(ErrorKind::PermissionDenied)),
-        );
-        assert_eq!(EMITTED.load(Ordering::Relaxed), 1);
-    }
-    #[test]
-    fn missing_sink_counts_and_install_is_idempotent() {
-        let hook = Hook::default();
-        hook.emit(EVENTS[0], &[]);
-        assert_eq!(hook.missed.load(Ordering::Relaxed), 1);
-        hook.install(|event, fields| {
-            assert_eq!(event, EVENTS[0]);
-            assert!(fields.is_empty());
-        });
-        hook.install(|_, _| panic!("installation replaced the original sink"));
-        hook.emit(EVENTS[0], &[]);
-        assert_eq!(hook.missed.load(Ordering::Relaxed), 1);
-    }
-}
diff --git a/rust/lithe-agent-host/src/hooks.rs b/rust/lithe-agent-host/src/hooks.rs
deleted file mode 100644
index 38f61566..00000000
--- a/rust/lithe-agent-host/src/hooks.rs
+++ /dev/null
@@ -1,842 +0,0 @@
-//! User-owned Hook library and explicit synchronization into native Agent files.
-//! Agent runtimes own execution, JSON stdin, timeouts and trust. This adapter
-//! never executes commands or grants trust, and preserves native group positions.
-
-mod storage;
-#[cfg(test)]
-mod tests;
-
-use crate::instructions::{self, InstructionFile};
-use serde::{Deserialize, Serialize};
-use serde_json::{json, Value};
-use std::path::PathBuf;
-use std::sync::Mutex;
-
-const AGENTS: [&str; 2] = ["codex-acp", "claude-acp"];
-static WRITE_LOCK: Mutex<()> = Mutex::new(());
-
-/// Portable lifecycle events implemented by both supported native runtimes.
-#[derive(Clone, Copy, Debug, Deserialize, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "kebab-case")]
-pub enum Event {
-    TurnEnd,
-    AfterTool,
-    BeforeTool,
-    Prompt,
-    SessionStart,
-}
-
-impl Event {
-    fn native(self) -> &'static str {
-        match self {
-            Self::TurnEnd => "Stop",
-            Self::AfterTool => "PostToolUse",
-            Self::BeforeTool => "PreToolUse",
-            Self::Prompt => "UserPromptSubmit",
-            Self::SessionStart => "SessionStart",
-        }
-    }
-}
-
-/// Portable tool families; upstream tool names remain provider-specific.
-#[derive(Clone, Copy, Debug, Default, Deserialize, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub enum Matcher {
-    #[default]
-    All,
-    Shell,
-    Edit,
-}
-
-/// One user-authored command. Names/descriptions stay in the library only.
-#[derive(Clone, Debug, Deserialize, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct Hook {
-    pub id: String,
-    pub name: String,
-    pub description: String,
-    pub event: Event,
-    pub matcher: Matcher,
-    pub command: String,
-    /// None inherits the Agent's own timeout; supplied values are seconds.
-    pub timeout_seconds: Option<u64>,
-    pub agents: Vec<String>,
-    pub enabled: bool,
-    /// A failed native removal retains a visible, retryable library entry.
-    #[serde(default)]
-    pub pending_removal: bool,
-}
-
-/// Guard against external edits and changes to the native profile directory.
-#[derive(Clone, Debug, Deserialize, Serialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct FileGuard {
-    pub agent_id: String,
-    pub path: PathBuf,
-    pub revision: String,
-}
-
-/// Native file metadata; configuration contents may contain secrets and stay private.
-#[derive(Debug, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct Target {
-    pub agent_id: String,
-    pub file: Option<FileGuard>,
-    pub issue: Option<String>,
-    pub disabled: bool,
-}
-
-/// Actual native placement is independent of the library's desired state.
-#[derive(Debug, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct HookView {
-    #[serde(flatten)]
-    pub hook: Hook,
-    pub configured_agents: Vec<String>,
-    pub needs_sync: bool,
-}
-
-/// Read-only snapshot used to guard the next explicit operation.
-#[derive(Debug, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct Library {
-    pub revision: String,
-    pub hooks: Vec<HookView>,
-    pub targets: Vec<Target>,
-}
-
-/// Platform-owned writable directory and one explicit library operation.
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct Request {
-    pub data_directory: PathBuf,
-    #[serde(flatten)]
-    pub action: Action,
-}
-
-/// Mutations always carry the source and native snapshots the user reviewed.
-#[derive(Deserialize)]
-#[serde(tag = "action", rename_all = "camelCase", deny_unknown_fields)]
-pub enum Action {
-    Read {},
-    Save {
-        hook: Hook,
-        #[serde(rename = "expectedRevision")]
-        expected_revision: String,
-        files: Vec<FileGuard>,
-    },
-    Remove {
-        id: String,
-        #[serde(rename = "expectedRevision")]
-        expected_revision: String,
-        files: Vec<FileGuard>,
-    },
-    Sync {
-        #[serde(rename = "expectedRevision")]
-        expected_revision: String,
-        files: Vec<FileGuard>,
-    },
-}
-
-/// Stable reason and credential-free diagnostic for Core's shared error envelope.
-#[derive(Debug)]
-pub struct Error {
-    pub reason: &'static str,
-    pub message: &'static str,
-}
-
-fn error(reason: &'static str, message: &'static str) -> Error {
-    Error { reason, message }
-}
-
-/// Execute without running any Hook command or modifying native trust settings.
-pub fn execute(request: Request, cancelled: &impl Fn() -> bool) -> Result<Library, Error> {
-    execute_in(request, &instructions::profile, cancelled, &WRITE_LOCK)
-}
-
-#[derive(Default, Deserialize, Serialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-struct Stored {
-    hooks: Vec<Hook>,
-    /// Includes planned placements until native replacement is confirmed. A
-    /// crash between source/native commits therefore never loses write ownership.
-    placements: Vec<Placement>,
-}
-
-#[derive(Clone, Debug, Deserialize, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-struct Placement {
-    id: String,
-    agent_id: String,
-    path: PathBuf,
-    event: String,
-    index: usize,
-    entry: Value,
-}
-
-type Resolver<'a> = dyn Fn(&str) -> Result<PathBuf, instructions::InstructionError> + 'a;
-
-fn execute_in(
-    request: Request,
-    resolve: &Resolver<'_>,
-    cancelled: &impl Fn() -> bool,
-    write_lock: &Mutex<()>,
-) -> Result<Library, Error> {
-    if !request.data_directory.is_absolute() {
-        return Err(error(
-            "invalid_request",
-            "The Hook library directory must be absolute.",
-        ));
-    }
-    check_cancelled(cancelled)?;
-    let path = request.data_directory.join("hooks.json");
-    if matches!(request.action, Action::Read {}) {
-        return view(storage::read("library", path)?, resolve);
-    }
-    let _guard = write_lock
-        .try_lock()
-        .map_err(|_| error("busy", "Another Hook update is running. Try again."))?;
-    let (expected_revision, guards) = match &request.action {
-        Action::Save {
-            hook,
-            expected_revision,
-            files,
-        } => {
-            validate(hook)?;
-            if hook.pending_removal {
-                return Err(error("invalid_request", "A removed Hook cannot be saved."));
-            }
-            (expected_revision, files)
-        }
-        Action::Remove {
-            expected_revision,
-            files,
-            ..
-        }
-        | Action::Sync {
-            expected_revision,
-            files,
-        } => (expected_revision, files),
-        Action::Read {} => unreachable!(),
-    };
-    if guards.len() > AGENTS.len()
-        || guards
-            .iter()
-            .any(|g| !AGENTS.contains(&g.agent_id.as_str()))
-        || guards
-            .iter()
-            .enumerate()
-            .any(|(i, g)| guards[..i].iter().any(|other| other.agent_id == g.agent_id))
-    {
-        return Err(error("invalid_request", "Invalid Hook file guards."));
-    }
-    let mut source = storage::read("library", path.clone())?;
-    if &source.revision != expected_revision {
-        return Err(storage::changed());
-    }
-    let mut stored = decode(&source)?;
-    check_cancelled(cancelled)?;
-    let _file_lock = storage::lock(&request.data_directory)?;
-    if storage::read("library", path.clone())?.revision != source.revision {
-        return Err(storage::changed());
-    }
-    match &request.action {
-        Action::Save { hook, .. } => {
-            let mut hook = hook.clone();
-            if name_taken(
-                stored
-                    .hooks
-                    .iter()
-                    .map(|h| (h.id.as_str(), h.name.as_str())),
-                &hook.id,
-                &hook.name,
-            ) {
-                return Err(error(
-                    "invalid_request",
-                    "A Hook with this name already exists.",
-                ));
-            }
-            hook.agents.sort();
-            if let Some(existing) = stored.hooks.iter_mut().find(|h| h.id == hook.id) {
-                *existing = hook;
-            } else {
-                if stored.hooks.len() >= 200 {
-                    return Err(error(
-                        "limit",
-                        "The Hook library can contain at most 200 Hooks.",
-                    ));
-                }
-                stored.hooks.push(hook);
-            }
-        }
-        Action::Remove { id, .. } => {
-            let hook = stored
-                .hooks
-                .iter_mut()
-                .find(|h| &h.id == id)
-                .ok_or_else(|| {
-                    error(
-                        "invalid_request",
-                        "This Hook no longer exists. Reload the library.",
-                    )
-                })?;
-            hook.pending_removal = true;
-        }
-        _ => {}
-    }
-    // Commit desired state first; a failed target remains explicitly out of sync.
-    source = storage::save(&source, &stored)?;
-    let guards = match &request.action {
-        Action::Save { files, .. } | Action::Remove { files, .. } | Action::Sync { files, .. } => {
-            files
-        }
-        _ => unreachable!(),
-    };
-    let mut failures = Vec::new();
-    for agent in AGENTS {
-        let result = (|| {
-            check_cancelled(cancelled)?;
-            let native = native_file(agent, resolve)?;
-            let (next, placements) = plan(&stored, &native)?;
-            if next == native.content {
-                stored.placements.retain(|p| p.agent_id != agent);
-                stored.placements.extend(placements);
-                source = storage::save(&source, &stored)?;
-                return Ok(());
-            }
-            let guard = guards
-                .iter()
-                .find(|g| g.agent_id == agent)
-                .ok_or_else(storage::changed)?;
-            if guard.path != native.path || guard.revision != native.revision {
-                return Err(storage::changed());
-            }
-            // Journal both versions BEFORE writing the target. On retry the
-            // exact matching version is recognized; no entry is claimed by name.
-            for placement in &placements {
-                if !stored.placements.contains(placement) {
-                    stored.placements.push(placement.clone());
-                }
-            }
-            source = storage::save(&source, &stored)?;
-            check_cancelled(cancelled)?;
-            storage::write_native(&native, &next)?;
-            stored.placements.retain(|p| p.agent_id != agent);
-            stored.placements.extend(placements);
-            source = storage::save(&source, &stored)?;
-            Ok::<(), Error>(())
-        })();
-        if let Err(issue) = result {
-            failures.push((agent, issue.message));
-        }
-    }
-    stored
-        .hooks
-        .retain(|h| !h.pending_removal || stored.placements.iter().any(|p| p.id == h.id));
-    source = storage::save(&source, &stored)?;
-    let mut result = view(source, resolve)?;
-    for (agent, issue) in failures {
-        if let Some(target) = result.targets.iter_mut().find(|t| t.agent_id == agent) {
-            target.issue = Some(issue.into());
-        }
-    }
-    Ok(result)
-}
-
-fn check_cancelled(cancelled: &impl Fn() -> bool) -> Result<(), Error> {
-    if cancelled() {
-        Err(error("cancelled", "Hook synchronization was cancelled."))
-    } else {
-        Ok(())
-    }
-}
-
-fn decode(source: &InstructionFile) -> Result<Stored, Error> {
-    if !source.exists {
-        return Ok(Stored::default());
-    }
-    let stored: Stored = serde_json::from_str(&source.content).map_err(|_| {
-        error(
-            "invalid_library",
-            "The Hook library is invalid. Restore it before making changes.",
-        )
-    })?;
-    if stored.hooks.len() > 200 || stored.placements.len() > 2000 {
-        return Err(error("limit", "The Hook library exceeded its size limit."));
-    }
-    for hook in &stored.hooks {
-        validate(hook)?;
-    }
-    if stored.hooks.iter().enumerate().any(|(i, h)| {
-        stored.hooks[..i]
-            .iter()
-            .any(|other| other.id == h.id || other.name.eq_ignore_ascii_case(&h.name))
-    }) {
-        return Err(error(
-            "invalid_library",
-            "The Hook library contains duplicate Hooks.",
-        ));
-    }
-    Ok(stored)
-}
-
-fn validate(hook: &Hook) -> Result<(), Error> {
-    let fields = Fields {
-        id: &hook.id,
-        name: &hook.name,
-        description: &hook.description,
-        event: hook.event,
-        matcher: hook.matcher,
-        command: &hook.command,
-        timeout: Ok(hook.timeout_seconds),
-        agents: &hook.agents,
-    };
-    if !field_issues(&fields, &[]).is_empty() {
-        return Err(error(
-            "invalid_request",
-            "Check the Hook name, command, event, Agents and timeout (1–86400 seconds).",
-        ));
-    }
-    Ok(())
-}
-
-/// Longest Hook name in UTF-8 bytes; names are ASCII-only, so bytes equal characters.
-const MAX_NAME_BYTES: usize = 80;
-/// Longest description in Unicode scalar values.
-const MAX_DESCRIPTION_SCALARS: usize = 200;
-/// Longest command in UTF-8 bytes, matching the native file write budget.
-const MAX_COMMAND_BYTES: usize = 32768;
-/// Largest explicit timeout in seconds (one day).
-const MAX_TIMEOUT_SECONDS: u64 = 86400;
-
-/// Unsaved editor state. `timeoutText` is the raw text field so integer parsing
-/// and the range rule stay in one place; an empty value inherits the Agent default.
-#[derive(Clone, Debug, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct Draft {
-    pub id: String,
-    pub name: String,
-    pub description: String,
-    pub event: Event,
-    pub matcher: Matcher,
-    pub command: String,
-    pub timeout_text: String,
-    pub agents: Vec<String>,
-}
-
-/// Identity of a Hook already in the library, used only for the unique-name rule.
-#[derive(Clone, Debug, Deserialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct ExistingHook {
-    pub id: String,
-    pub name: String,
-}
-
-/// Payload of `agent.hooks.validateDraft`. Pure: no files are read or written.
-#[derive(Clone, Debug, Deserialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct DraftRequest {
-    pub hook: Draft,
-    /// Library rows other than the draft; the draft's own id is ignored here.
-    #[serde(default)]
-    pub existing_hooks: Vec<ExistingHook>,
-}
-
-/// One field-level problem. `field` is a draft field name (`id`, `name`,
-/// `description`, `command`, `timeout`, `agents`, `matcher`); `code` is a stable
-/// snake_case reason the platform localizes. Each field reports at most one issue.
-#[derive(Clone, Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct DraftIssue {
-    pub field: &'static str,
-    pub code: &'static str,
-}
-
-/// Draft verdict. Saving is allowed only when `valid`; `timeoutSeconds` is the
-/// parsed value the platform stores in the Hook it saves.
-#[derive(Clone, Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct DraftValidation {
-    pub valid: bool,
-    pub issues: Vec<DraftIssue>,
-    pub timeout_seconds: Option<u64>,
-}
-
-/// Applies the same rules `save` enforces, field by field, without touching files.
-pub fn validate_draft(request: &DraftRequest) -> DraftValidation {
-    let draft = &request.hook;
-    let timeout = parse_timeout(&draft.timeout_text);
-    let fields = Fields {
-        id: &draft.id,
-        name: &draft.name,
-        description: &draft.description,
-        event: draft.event,
-        matcher: draft.matcher,
-        command: &draft.command,
-        timeout,
-        agents: &draft.agents,
-    };
-    let issues = field_issues(&fields, &request.existing_hooks);
-    // A rejected timeout has no value to store.
-    let timeout_seconds = if issues.iter().any(|issue| issue.field == "timeout") {
-        None
-    } else {
-        timeout.ok().flatten()
-    };
-    DraftValidation {
-        valid: issues.is_empty(),
-        timeout_seconds,
-        issues,
-    }
-}
-
-/// Names are unique ignoring ASCII case; a Hook never conflicts with itself.
-fn name_taken<'a>(
-    mut others: impl Iterator<Item = (&'a str, &'a str)>,
-    id: &str,
-    name: &str,
-) -> bool {
-    others.any(|(other_id, other_name)| other_id != id && other_name.eq_ignore_ascii_case(name))
-}
-
-/// Accepts only ASCII digits so signs, spaces and fractions never round silently.
-fn parse_timeout(text: &str) -> Result<Option<u64>, &'static str> {
-    if text.is_empty() {
-        return Ok(None);
-    }
-    if !text.bytes().all(|b| b.is_ascii_digit()) {
-        return Err("not_integer");
-    }
-    // Overlong digit strings are still integers, just out of range.
-    Ok(Some(text.parse::<u64>().unwrap_or(u64::MAX)))
-}
-
-struct Fields<'a> {
-    id: &'a str,
-    name: &'a str,
-    description: &'a str,
-    event: Event,
-    matcher: Matcher,
-    command: &'a str,
-    timeout: Result<Option<u64>, &'static str>,
-    agents: &'a [String],
-}
-
-// Field order is the editor's top-to-bottom order so the first issue is the first
-// control the user sees.
-fn field_issues(fields: &Fields<'_>, existing: &[ExistingHook]) -> Vec<DraftIssue> {
-    let mut issues = Vec::new();
-    let mut push = |field, code: Option<&'static str>| {
-        if let Some(code) = code {
-            issues.push(DraftIssue { field, code });
-        }
-    };
-    push(
-        "id",
-        uuid::Uuid::parse_str(fields.id)
-            .is_err()
-            .then_some("invalid"),
-    );
-    let name = fields.name;
-    push(
-        "name",
-        if name.is_empty() {
-            Some("required")
-        } else if name.len() > MAX_NAME_BYTES {
-            Some("too_long")
-        } else if !name
-            .bytes()
-            .all(|c| c.is_ascii_alphanumeric() || c == b'-' || c == b'_')
-        {
-            Some("invalid_characters")
-        } else if name_taken(
-            existing.iter().map(|h| (h.id.as_str(), h.name.as_str())),
-            fields.id,
-            name,
-        ) {
-            Some("duplicate")
-        } else {
-            None
-        },
-    );
-    push(
-        "description",
-        (fields.description.chars().count() > MAX_DESCRIPTION_SCALARS).then_some("too_long"),
-    );
-    push(
-        "matcher",
-        (!matches!(fields.event, Event::BeforeTool | Event::AfterTool)
-            && fields.matcher != Matcher::All)
-            .then_some("incompatible_event"),
-    );
-    let command = fields.command;
-    push(
-        "command",
-        if command.trim().is_empty() {
-            Some("required")
-        } else if command.len() > MAX_COMMAND_BYTES {
-            Some("too_long")
-        } else if command.contains('\0') {
-            Some("contains_nul")
-        } else {
-            None
-        },
-    );
-    push(
-        "timeout",
-        match fields.timeout {
-            Err(code) => Some(code),
-            Ok(Some(seconds)) if seconds == 0 || seconds > MAX_TIMEOUT_SECONDS => {
-                Some("out_of_range")
-            }
-            Ok(_) => None,
-        },
-    );
-    let agents = fields.agents;
-    push(
-        "agents",
-        if agents.is_empty() {
-            Some("required")
-        } else if agents.iter().any(|a| !AGENTS.contains(&a.as_str())) {
-            Some("unsupported")
-        } else if agents
-            .iter()
-            .enumerate()
-            .any(|(i, a)| agents[..i].contains(a))
-        {
-            Some("duplicate")
-        } else {
-            None
-        },
-    );
-    issues
-}
-
-fn native_file(agent: &str, resolve: &Resolver<'_>) -> Result<InstructionFile, Error> {
-    let directory = resolve(agent).map_err(storage::file_error)?;
-    storage::read(
-        agent,
-        directory.join(if agent == "codex-acp" {
-            "hooks.json"
-        } else {
-            "settings.json"
-        }),
-    )
-}
-
-fn document(file: &InstructionFile) -> Result<Value, Error> {
-    let value = if !file.exists {
-        json!({})
-    } else {
-        storage::parse_json(&file.content).map_err(|_| {
-            error(
-                "invalid_json",
-                "The native Hook configuration must be valid JSON. Existing contents were kept.",
-            )
-        })?
-    };
-    if !value.is_object() || value.get("hooks").is_some_and(|h| !h.is_object()) {
-        return Err(error(
-            "invalid_json",
-            "The native hooks field must be a JSON object. Existing contents were kept.",
-        ));
-    }
-    Ok(value)
-}
-
-fn entry(hook: &Hook, agent: &str) -> Value {
-    let mut command = json!({"type": "command", "command": hook.command});
-    if let Some(timeout) = hook.timeout_seconds {
-        command["timeout"] = json!(timeout);
-    }
-    let mut value = json!({"hooks": [command]});
-    let matcher = match hook.matcher {
-        Matcher::All => None,
-        Matcher::Shell => Some("Bash"),
-        Matcher::Edit if agent == "codex-acp" => Some("apply_patch"),
-        Matcher::Edit => Some("Edit|Write|MultiEdit"),
-    };
-    if let Some(matcher) = matcher {
-        value["matcher"] = json!(matcher);
-    }
-    value
-}
-
-fn group<'a>(doc: &'a Value, placement: &Placement) -> Option<&'a Value> {
-    doc.get("hooks")?
-        .get(&placement.event)?
-        .as_array()?
-        .get(placement.index)
-}
-
-// Removing a group by compaction would move Codex's index-based trust to another
-// command. Keep empty groups as tombstones and append new commands only.
-fn plan(stored: &Stored, native: &InstructionFile) -> Result<(String, Vec<Placement>), Error> {
-    let mut doc = document(native)?;
-    let original = doc.clone();
-    let mut kept = Vec::new();
-    for placement in stored
-        .placements
-        .iter()
-        .filter(|p| p.agent_id == native.agent_id)
-    {
-        if placement.path != native.path {
-            return Err(error("profile_changed", "The Agent profile changed. Restore the previous profile before synchronizing its Hooks."));
-        }
-        let current = group(&doc, placement);
-        let matches = current == Some(&placement.entry);
-        let known_variant = stored.placements.iter().any(|p| {
-            p.agent_id == placement.agent_id
-                && p.path == placement.path
-                && p.event == placement.event
-                && p.index == placement.index
-                && group(&doc, p) == Some(&p.entry)
-        });
-        if !matches {
-            if current.is_some_and(|g| g != &json!({"hooks": []})) && !known_variant {
-                return Err(error("ownership_changed", "A managed Hook was edited outside Lithe. Restore or remove that native entry before synchronizing."));
-            }
-            continue;
-        }
-        let wanted = stored.hooks.iter().find(|h| {
-            h.id == placement.id
-                && !h.pending_removal
-                && h.enabled
-                && h.agents.contains(&native.agent_id)
-        });
-        if wanted.is_some_and(|h| {
-            h.event.native() == placement.event && entry(h, &native.agent_id) == placement.entry
-        }) && !kept.iter().any(|p: &Placement| p.id == placement.id)
-        {
-            kept.push(placement.clone());
-        } else {
-            doc["hooks"][&placement.event][placement.index] = json!({"hooks": []});
-        }
-    }
-    for hook in stored
-        .hooks
-        .iter()
-        .filter(|h| !h.pending_removal && h.enabled && h.agents.contains(&native.agent_id))
-    {
-        if kept.iter().any(|p| p.id == hook.id) {
-            continue;
-        }
-        let event = hook.event.native();
-        if doc.get("hooks").is_none() {
-            doc["hooks"] = json!({});
-        }
-        if doc["hooks"].get(event).is_none() {
-            doc["hooks"][event] = json!([]);
-        }
-        let groups = doc["hooks"][event].as_array_mut().ok_or_else(|| {
-            error(
-                "invalid_json",
-                "The native Hook event must contain an array. Existing contents were kept.",
-            )
-        })?;
-        if groups.contains(&entry(hook, &native.agent_id)) {
-            return Err(error(
-                "duplicate_native",
-                "An identical native Hook already exists. Lithe kept it unchanged.",
-            ));
-        }
-        let placement = Placement {
-            id: hook.id.clone(),
-            agent_id: native.agent_id.clone(),
-            path: native.path.clone(),
-            event: event.into(),
-            index: groups.len(),
-            entry: entry(hook, &native.agent_id),
-        };
-        groups.push(placement.entry.clone());
-        kept.push(placement);
-    }
-    let content = if doc == original {
-        native.content.clone()
-    } else {
-        serde_json::to_string_pretty(&doc)
-            .map_err(|_| error("invalid_json", "Cannot encode Hook configuration."))?
-            + "\n"
-    };
-    Ok((content, kept))
-}
-
-fn view(source: InstructionFile, resolve: &Resolver<'_>) -> Result<Library, Error> {
-    let stored = decode(&source)?;
-    let mut targets = Vec::new();
-    let mut native_docs = Vec::new();
-    for agent in AGENTS {
-        let result = native_file(agent, resolve).and_then(|file| {
-            let doc = document(&file)?;
-            Ok((file, doc))
-        });
-        match result {
-            Ok((file, doc)) => {
-                let issue = plan(&stored, &file).err().map(|e| e.message.into());
-                targets.push(Target {
-                    agent_id: agent.into(),
-                    file: Some(FileGuard {
-                        agent_id: agent.into(),
-                        path: file.path.clone(),
-                        revision: file.revision,
-                    }),
-                    issue,
-                    disabled: doc.get("disableAllHooks").and_then(Value::as_bool) == Some(true),
-                });
-                native_docs.push((agent, file.path, doc));
-            }
-            Err(issue) => targets.push(Target {
-                agent_id: agent.into(),
-                file: None,
-                issue: Some(issue.message.into()),
-                disabled: false,
-            }),
-        }
-    }
-    let hooks = stored
-        .hooks
-        .iter()
-        .map(|hook| {
-            let mut configured_agents = Vec::new();
-            let mut stale = false;
-            for placement in stored.placements.iter().filter(|p| p.id == hook.id) {
-                let current = native_docs
-                    .iter()
-                    .find(|(agent, path, _)| {
-                        *agent == placement.agent_id && *path == placement.path
-                    })
-                    .and_then(|(_, _, doc)| group(doc, placement));
-                if current == Some(&placement.entry) {
-                    if hook.event.native() == placement.event
-                        && entry(hook, &placement.agent_id) == placement.entry
-                    {
-                        if !configured_agents.contains(&placement.agent_id) {
-                            configured_agents.push(placement.agent_id.clone());
-                        }
-                    } else {
-                        stale = true;
-                    }
-                } else if current.is_some_and(|g| g != &json!({"hooks": []})) {
-                    stale = true;
-                }
-            }
-            configured_agents.sort();
-            let mut wanted = if hook.enabled && !hook.pending_removal {
-                hook.agents.clone()
-            } else {
-                Vec::new()
-            };
-            wanted.sort();
-            HookView {
-                hook: hook.clone(),
-                needs_sync: stale || configured_agents != wanted,
-                configured_agents,
-            }
-        })
-        .collect();
-    Ok(Library {
-        revision: source.revision,
-        hooks,
-        targets,
-    })
-}
diff --git a/rust/lithe-agent-host/src/hooks/storage.rs b/rust/lithe-agent-host/src/hooks/storage.rs
deleted file mode 100644
index b0146ad8..00000000
--- a/rust/lithe-agent-host/src/hooks/storage.rs
+++ /dev/null
@@ -1,150 +0,0 @@
-//! Bounded, guarded file access shared with the native instruction adapter.
-
-use super::*;
-use fs2::FileExt;
-use std::fs::{self, File, OpenOptions};
-use std::path::Path;
-
-// Reject duplicate object keys instead of silently discarding the earlier
-// value while rewriting an unrelated Hook in a user's native settings.
-pub(super) fn parse_json(content: &str) -> Result<Value, serde_json::Error> {
-    use serde::de::{self, MapAccess, SeqAccess, Visitor};
-    struct Unique(Value);
-    impl<'de> Deserialize<'de> for Unique {
-        fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
-            struct UniqueVisitor;
-            impl<'de> Visitor<'de> for UniqueVisitor {
-                type Value = Unique;
-                fn expecting(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-                    f.write_str("JSON with unique object keys")
-                }
-                fn visit_bool<E: de::Error>(self, v: bool) -> Result<Unique, E> {
-                    Ok(Unique(Value::Bool(v)))
-                }
-                fn visit_i64<E: de::Error>(self, v: i64) -> Result<Unique, E> {
-                    Ok(Unique(v.into()))
-                }
-                fn visit_u64<E: de::Error>(self, v: u64) -> Result<Unique, E> {
-                    Ok(Unique(v.into()))
-                }
-                fn visit_f64<E: de::Error>(self, v: f64) -> Result<Unique, E> {
-                    serde_json::Number::from_f64(v)
-                        .map(|n| Unique(Value::Number(n)))
-                        .ok_or_else(|| E::custom("invalid number"))
-                }
-                fn visit_str<E: de::Error>(self, v: &str) -> Result<Unique, E> {
-                    Ok(Unique(Value::String(v.into())))
-                }
-                fn visit_string<E: de::Error>(self, v: String) -> Result<Unique, E> {
-                    Ok(Unique(Value::String(v)))
-                }
-                fn visit_unit<E: de::Error>(self) -> Result<Unique, E> {
-                    Ok(Unique(Value::Null))
-                }
-                fn visit_seq<A: SeqAccess<'de>>(self, mut seq: A) -> Result<Unique, A::Error> {
-                    let mut values = Vec::new();
-                    while let Some(value) = seq.next_element::<Unique>()? {
-                        values.push(value.0);
-                    }
-                    Ok(Unique(Value::Array(values)))
-                }
-                fn visit_map<A: MapAccess<'de>>(self, mut map: A) -> Result<Unique, A::Error> {
-                    let mut values = serde_json::Map::new();
-                    while let Some((key, value)) = map.next_entry::<String, Unique>()? {
-                        if values.insert(key, value.0).is_some() {
-                            return Err(de::Error::custom("duplicate object key"));
-                        }
-                    }
-                    Ok(Unique(Value::Object(values)))
-                }
-            }
-            deserializer.deserialize_any(UniqueVisitor)
-        }
-    }
-    serde_json::from_str::<Unique>(content).map(|value| value.0)
-}
-
-pub(super) fn file_error(issue: instructions::InstructionError) -> Error {
-    let message = match issue.reason {
-        "file_changed" => "Hook configuration changed outside this editor. Reload before saving.",
-        "unsafe_file" => {
-            "Hook configuration must be a regular file, not a symbolic link or directory."
-        }
-        "file_too_large" => "Hook configuration must be no larger than 1 MiB.",
-        "invalid_utf8" => "Hook configuration must use UTF-8 encoding.",
-        _ => "Cannot access Hook configuration. Check the file permissions and Agent profile.",
-    };
-    error(issue.reason, message)
-}
-
-pub(super) fn changed() -> Error {
-    error(
-        "file_changed",
-        "Hook configuration changed outside this editor. Reload before saving.",
-    )
-}
-
-pub(super) fn read(agent: &str, path: PathBuf) -> Result<InstructionFile, Error> {
-    instructions::snapshot(agent, path).map_err(file_error)
-}
-
-pub(super) fn write_native(previous: &InstructionFile, content: &str) -> Result<(), Error> {
-    instructions::write_snapshot(previous, content, || {
-        instructions::snapshot(&previous.agent_id, previous.path.clone())
-    })
-    .map_err(file_error)
-}
-
-pub(super) fn save(previous: &InstructionFile, stored: &Stored) -> Result<InstructionFile, Error> {
-    let content = serde_json::to_string_pretty(stored)
-        .map_err(|_| error("invalid_library", "Cannot encode the Hook library."))?
-        + "\n";
-    if previous.content != content {
-        write_native(previous, &content)?;
-    }
-    read("library", previous.path.clone())
-}
-
-// The empty lock belongs to user state. Nonblocking OS locking coordinates
-// distinct Lithe processes; it never relies on a stale PID or timeout sleep.
-pub(super) fn lock(directory: &Path) -> Result<File, Error> {
-    let access = |_| {
-        error(
-            "file_access",
-            "Cannot access the Hook library. Check its permissions.",
-        )
-    };
-    let mut directories = fs::DirBuilder::new();
-    directories.recursive(true);
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::DirBuilderExt;
-        directories.mode(0o700);
-    }
-    directories.create(directory).map_err(access)?;
-    let mut options = OpenOptions::new();
-    options.read(true).write(true).create(true).truncate(false);
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::OpenOptionsExt;
-        options
-            .mode(0o600)
-            .custom_flags(libc::O_NOFOLLOW | libc::O_NONBLOCK);
-    }
-    #[cfg(windows)]
-    {
-        use std::os::windows::fs::OpenOptionsExt;
-        options.custom_flags(0x00200000);
-    }
-    let lock = options.open(directory.join(".sync.lock")).map_err(access)?;
-    let kind = lock.metadata().map_err(access)?.file_type();
-    if !kind.is_file() || kind.is_symlink() {
-        return Err(error(
-            "unsafe_file",
-            "The Hook library lock must be a regular file.",
-        ));
-    }
-    lock.try_lock_exclusive()
-        .map_err(|_| error("busy", "Another Hook update is running. Try again."))?;
-    Ok(lock)
-}
diff --git a/rust/lithe-agent-host/src/hooks/tests.rs b/rust/lithe-agent-host/src/hooks/tests.rs
deleted file mode 100644
index d51261b7..00000000
--- a/rust/lithe-agent-host/src/hooks/tests.rs
+++ /dev/null
@@ -1,516 +0,0 @@
-use super::*;
-use std::fs;
-
-struct Fixture(PathBuf);
-impl Fixture {
-    fn new() -> Self {
-        Self(std::env::temp_dir().join(format!("lithe-hooks-test-{}", uuid::Uuid::new_v4())))
-    }
-    fn directory(&self) -> PathBuf {
-        self.0.join("library")
-    }
-    fn profile(&self, agent: &str) -> PathBuf {
-        self.0.join("profiles").join(agent)
-    }
-    fn native(&self, agent: &str) -> PathBuf {
-        self.profile(agent).join(if agent == "codex-acp" {
-            "hooks.json"
-        } else {
-            "settings.json"
-        })
-    }
-    fn write(&self, agent: &str, content: &str) {
-        fs::create_dir_all(self.profile(agent)).unwrap();
-        fs::write(self.native(agent), content).unwrap();
-    }
-    fn run(&self, action: Action) -> Result<Library, Error> {
-        execute_in(
-            Request {
-                data_directory: self.directory(),
-                action,
-            },
-            &|agent| Ok(self.profile(agent)),
-            &|| false,
-            &Mutex::new(()),
-        )
-    }
-    fn read(&self) -> Library {
-        self.run(Action::Read {}).unwrap()
-    }
-    fn save(&self, hook: Hook, before: &Library) -> Library {
-        self.run(Action::Save {
-            hook,
-            expected_revision: before.revision.clone(),
-            files: guards(before),
-        })
-        .unwrap()
-    }
-    fn sync(&self, before: &Library) -> Library {
-        self.run(Action::Sync {
-            expected_revision: before.revision.clone(),
-            files: guards(before),
-        })
-        .unwrap()
-    }
-    fn doc(&self, agent: &str) -> Value {
-        serde_json::from_slice(&fs::read(self.native(agent)).unwrap()).unwrap()
-    }
-}
-impl Drop for Fixture {
-    fn drop(&mut self) {
-        if self.0.exists() {
-            fs::remove_dir_all(&self.0).expect("remove owned Hook fixture");
-        }
-    }
-}
-fn guards(library: &Library) -> Vec<FileGuard> {
-    library
-        .targets
-        .iter()
-        .filter_map(|t| t.file.clone())
-        .collect()
-}
-fn hook() -> Hook {
-    Hook {
-        id: uuid::Uuid::new_v4().to_string(),
-        name: "notify".into(),
-        description: "一轮结束时提醒".into(),
-        event: Event::TurnEnd,
-        matcher: Matcher::All,
-        command: "printf done".into(),
-        timeout_seconds: None,
-        agents: AGENTS.iter().map(|a| (*a).into()).collect(),
-        enabled: true,
-        pending_removal: false,
-    }
-}
-
-#[test]
-fn opening_the_library_is_read_only_and_does_not_expose_native_secrets() {
-    let fixture = Fixture::new();
-    assert!(fixture.read().hooks.is_empty());
-    assert!(!fixture.0.exists());
-    fixture.write("claude-acp", r#"{"env":{"API_KEY":"fixture-secret"}}"#);
-    let encoded = serde_json::to_string(&fixture.read()).unwrap();
-    assert!(!encoded.contains("fixture-secret"));
-}
-
-#[test]
-fn saves_both_native_formats_without_executing_commands_or_replacing_other_settings() {
-    let fixture = Fixture::new();
-    let own = json!({"hooks": [{"type": "command", "command": "own-hook"}], "matcher": "custom"});
-    fixture.write("claude-acp", &json!({"env": {"TOKEN": "fixture"}, "hooks": {"Stop": [own.clone()]}, "disableAllHooks": true}).to_string());
-    let mut wanted = hook();
-    wanted.command = format!("touch {}", fixture.0.join("must-not-exist").display());
-    let saved = fixture.save(wanted.clone(), &fixture.read());
-    assert!(!saved.hooks[0].needs_sync);
-    assert_eq!(saved.hooks[0].configured_agents.len(), 2);
-    assert_eq!(fixture.doc("claude-acp")["env"]["TOKEN"], "fixture");
-    assert_eq!(fixture.doc("claude-acp")["hooks"]["Stop"][0], own);
-    assert_eq!(
-        fixture.doc("codex-acp")["hooks"]["Stop"][0],
-        entry(&wanted, "codex-acp")
-    );
-    assert!(
-        saved
-            .targets
-            .iter()
-            .find(|t| t.agent_id == "claude-acp")
-            .unwrap()
-            .disabled
-    );
-    assert!(!fixture.0.join("must-not-exist").exists());
-    assert!(fixture.doc("codex-acp")["hooks"]["Stop"][0]["hooks"][0]
-        .get("timeout")
-        .is_none());
-}
-
-#[test]
-fn portable_tool_filters_and_timeouts_use_the_agents_own_names() {
-    let fixture = Fixture::new();
-    let mut wanted = hook();
-    wanted.event = Event::AfterTool;
-    wanted.matcher = Matcher::Edit;
-    wanted.timeout_seconds = Some(30);
-    fixture.save(wanted, &fixture.read());
-    assert_eq!(
-        fixture.doc("codex-acp")["hooks"]["PostToolUse"][0]["matcher"],
-        "apply_patch"
-    );
-    assert_eq!(
-        fixture.doc("claude-acp")["hooks"]["PostToolUse"][0]["matcher"],
-        "Edit|Write|MultiEdit"
-    );
-    assert_eq!(
-        fixture.doc("claude-acp")["hooks"]["PostToolUse"][0]["hooks"][0]["timeout"],
-        30
-    );
-    for event in [
-        Event::TurnEnd,
-        Event::AfterTool,
-        Event::BeforeTool,
-        Event::Prompt,
-        Event::SessionStart,
-    ] {
-        let mut wanted = hook();
-        wanted.event = event;
-        wanted.matcher = Matcher::All;
-        assert!(entry(&wanted, "codex-acp").get("matcher").is_none());
-    }
-}
-
-#[test]
-fn editing_disabling_and_deleting_preserve_codex_trust_positions_and_user_hooks() {
-    let fixture = Fixture::new();
-    let own = json!({"hooks": [{"type": "command", "command": "user-command"}]});
-    fixture.write(
-        "codex-acp",
-        &json!({"hooks": {"Stop": [own.clone()]}}).to_string(),
-    );
-    let trust_path = fixture.profile("codex-acp").join("config.toml");
-    fs::write(
-        &trust_path,
-        "# user-owned trust state\n[features]\nhooks = true\n",
-    )
-    .unwrap();
-    let trust = fs::read(&trust_path).unwrap();
-    let mut wanted = hook();
-    let first = fixture.save(wanted.clone(), &fixture.read());
-    wanted.command = "printf updated".into();
-    let second = fixture.save(wanted.clone(), &first);
-    assert_eq!(fixture.doc("codex-acp")["hooks"]["Stop"][0], own);
-    assert_eq!(
-        fixture.doc("codex-acp")["hooks"]["Stop"][1],
-        json!({"hooks": []})
-    );
-    assert_eq!(
-        fixture.doc("codex-acp")["hooks"]["Stop"][2]["hooks"][0]["command"],
-        wanted.command
-    );
-    wanted.enabled = false;
-    let disabled = fixture.save(wanted.clone(), &second);
-    assert!(disabled.hooks[0].configured_agents.is_empty());
-    assert!(!disabled.hooks[0].needs_sync);
-    wanted.enabled = true;
-    let enabled = fixture.save(wanted.clone(), &disabled);
-    let removed = fixture
-        .run(Action::Remove {
-            id: wanted.id,
-            expected_revision: enabled.revision.clone(),
-            files: guards(&enabled),
-        })
-        .unwrap();
-    assert!(removed.hooks.is_empty());
-    assert_eq!(fixture.doc("codex-acp")["hooks"]["Stop"][0], own);
-    assert_eq!(fs::read(trust_path).unwrap(), trust);
-}
-
-#[test]
-fn saving_an_unrelated_hook_keeps_an_existing_trusted_command_at_its_position() {
-    let fixture = Fixture::new();
-    let first = fixture.save(hook(), &fixture.read());
-    let original = fixture.doc("codex-acp")["hooks"]["Stop"][0].clone();
-    let mut other = hook();
-    other.name = "other".into();
-    other.command = "printf other".into();
-    let second = fixture.save(other, &first);
-    assert!(second.hooks.iter().all(|h| !h.needs_sync));
-    assert_eq!(fixture.doc("codex-acp")["hooks"]["Stop"][0], original);
-    assert_eq!(
-        fixture.doc("codex-acp")["hooks"]["Stop"]
-            .as_array()
-            .unwrap()
-            .len(),
-        2
-    );
-}
-
-#[test]
-fn stale_source_is_rejected_and_native_conflicts_report_partial_success_then_retry() {
-    let fixture = Fixture::new();
-    let before = fixture.read();
-    fixture.write("codex-acp", r#"{"external":true}"#);
-    let saved = fixture.save(hook(), &before);
-    assert!(saved.hooks[0].needs_sync);
-    assert_eq!(saved.hooks[0].configured_agents, ["claude-acp"]);
-    assert!(saved.targets[0].issue.is_some());
-    assert_eq!(fixture.doc("codex-acp"), json!({"external": true}));
-    assert_eq!(
-        fixture
-            .run(Action::Save {
-                hook: hook(),
-                expected_revision: before.revision,
-                files: vec![]
-            })
-            .unwrap_err()
-            .reason,
-        "file_changed"
-    );
-    let retried = fixture.sync(&fixture.read());
-    assert!(!retried.hooks[0].needs_sync);
-    assert_eq!(fixture.doc("codex-acp")["external"], true);
-}
-
-#[test]
-fn malformed_native_settings_are_preserved_while_the_other_agent_can_sync() {
-    let fixture = Fixture::new();
-    fixture.write("claude-acp", "{ invalid settings");
-    let saved = fixture.save(hook(), &fixture.read());
-    assert!(saved.hooks[0].needs_sync);
-    assert_eq!(saved.hooks[0].configured_agents, ["codex-acp"]);
-    assert_eq!(
-        fs::read_to_string(fixture.native("claude-acp")).unwrap(),
-        "{ invalid settings"
-    );
-}
-
-#[test]
-fn externally_edited_owned_commands_are_never_removed_or_duplicated() {
-    let fixture = Fixture::new();
-    let saved = fixture.save(hook(), &fixture.read());
-    let mut changed = fixture.doc("codex-acp");
-    changed["hooks"]["Stop"][0]["hooks"][0]["command"] = json!("user-modified");
-    fixture.write("codex-acp", &changed.to_string());
-    let reread = fixture.read();
-    assert!(reread.hooks[0].needs_sync);
-    let removed = fixture
-        .run(Action::Remove {
-            id: saved.hooks[0].hook.id.clone(),
-            expected_revision: reread.revision.clone(),
-            files: guards(&reread),
-        })
-        .unwrap();
-    assert!(removed.hooks[0].hook.pending_removal);
-    assert!(removed.targets[0].issue.is_some());
-    assert_eq!(fixture.doc("codex-acp"), changed);
-    // Removing the external entry explicitly makes the pending operation retryable.
-    fixture.write("codex-acp", "{}");
-    assert!(fixture.sync(&fixture.read()).hooks.is_empty());
-}
-
-#[test]
-fn journals_survive_a_crash_before_or_after_a_native_write_without_duplicate_execution() {
-    for native_committed in [false, true] {
-        let fixture = Fixture::new();
-        let saved = fixture.save(hook(), &fixture.read());
-        let source = storage::read("library", fixture.directory().join("hooks.json")).unwrap();
-        let mut stored = decode(&source).unwrap();
-        stored.hooks[0].command = "printf replacement".into();
-        let native = native_file("codex-acp", &|agent| Ok(fixture.profile(agent))).unwrap();
-        let (next, planned) = plan(&stored, &native).unwrap();
-        stored.placements.extend(planned);
-        storage::save(&source, &stored).unwrap();
-        if native_committed {
-            storage::write_native(&native, &next).unwrap();
-        }
-        let recovered = fixture.sync(&fixture.read());
-        assert!(recovered.hooks.iter().all(|h| !h.needs_sync));
-        let doc = fixture.doc("codex-acp");
-        let running = doc["hooks"]["Stop"]
-            .as_array()
-            .unwrap()
-            .iter()
-            .flat_map(|g| g["hooks"].as_array().unwrap());
-        assert_eq!(running.count(), 1);
-        assert_eq!(recovered.hooks[0].hook.id, saved.hooks[0].hook.id);
-    }
-}
-
-#[test]
-fn cancellation_before_start_has_no_side_effects_and_between_targets_is_retryable() {
-    let fixture = Fixture::new();
-    let request = Request {
-        data_directory: fixture.directory(),
-        action: Action::Read {},
-    };
-    assert_eq!(
-        execute_in(
-            request,
-            &|agent| Ok(fixture.profile(agent)),
-            &|| true,
-            &Mutex::new(())
-        )
-        .unwrap_err()
-        .reason,
-        "cancelled"
-    );
-    assert!(!fixture.0.exists());
-    let before = fixture.read();
-    let result = execute_in(
-        Request {
-            data_directory: fixture.directory(),
-            action: Action::Save {
-                hook: hook(),
-                expected_revision: before.revision.clone(),
-                files: guards(&before),
-            },
-        },
-        &|agent| Ok(fixture.profile(agent)),
-        &|| fixture.native("codex-acp").exists(),
-        &Mutex::new(()),
-    )
-    .unwrap();
-    assert!(result.hooks[0].needs_sync);
-    assert!(!fixture.native("claude-acp").exists());
-    assert!(!fixture.sync(&fixture.read()).hooks[0].needs_sync);
-}
-
-#[test]
-fn validates_names_events_timeout_agent_selection_and_strict_requests_before_writing() {
-    let mut invalid = hook();
-    invalid.name = "../escape".into();
-    assert!(validate(&invalid).is_err());
-    let mut invalid = hook();
-    invalid.timeout_seconds = Some(0);
-    assert!(validate(&invalid).is_err());
-    let mut invalid = hook();
-    invalid.timeout_seconds = Some(86401);
-    assert!(validate(&invalid).is_err());
-    let mut invalid = hook();
-    invalid.agents = vec!["unknown".into()];
-    assert!(validate(&invalid).is_err());
-    let mut invalid = hook();
-    invalid.matcher = Matcher::Shell;
-    assert!(validate(&invalid).is_err());
-    let mut invalid = hook();
-    invalid.description = "汉".repeat(201);
-    assert!(validate(&invalid).is_err());
-    assert!(serde_json::from_value::<Request>(
-        json!({"dataDirectory": "/fixture", "action": "read", "command": "must-not-run"})
-    )
-    .is_err());
-}
-
-#[test]
-fn duplicate_json_keys_and_identical_user_owned_commands_are_never_overwritten_or_claimed() {
-    let fixture = Fixture::new();
-    let wanted = hook();
-    fixture.write(
-        "codex-acp",
-        &json!({"hooks": {"Stop": [entry(&wanted, "codex-acp")]}}).to_string(),
-    );
-    let duplicate = "{\"env\":{\"TOKEN\":\"first\",\"TOKEN\":\"second\"}}";
-    fixture.write("claude-acp", duplicate);
-    let result = fixture.save(wanted.clone(), &fixture.read());
-    assert!(result.targets.iter().all(|t| t.issue.is_some()));
-    assert!(result.hooks[0].configured_agents.is_empty());
-    assert_eq!(
-        fixture.doc("codex-acp")["hooks"]["Stop"]
-            .as_array()
-            .unwrap()
-            .len(),
-        1
-    );
-    assert_eq!(
-        fs::read_to_string(fixture.native("claude-acp")).unwrap(),
-        duplicate
-    );
-    let source = storage::read("library", fixture.directory().join("hooks.json")).unwrap();
-    assert!(decode(&source).unwrap().placements.is_empty());
-}
-
-#[test]
-fn os_library_lock_is_nonblocking_and_released_with_its_owner() {
-    let fixture = Fixture::new();
-    let first = storage::lock(&fixture.directory()).unwrap();
-    assert_eq!(
-        storage::lock(&fixture.directory()).unwrap_err().reason,
-        "busy"
-    );
-    drop(first);
-    assert!(storage::lock(&fixture.directory()).is_ok());
-}
-
-#[cfg(unix)]
-#[test]
-fn symlinked_native_files_are_not_followed_and_readonly_permissions_are_preserved() {
-    use std::os::unix::fs::{symlink, PermissionsExt};
-    let fixture = Fixture::new();
-    fixture.write("codex-acp", "{}");
-    let outside = fixture.0.join("outside.json");
-    fs::write(&outside, "{}").unwrap();
-    fs::remove_file(fixture.native("codex-acp")).unwrap();
-    symlink(&outside, fixture.native("codex-acp")).unwrap();
-    fixture.write("claude-acp", "{}");
-    fs::set_permissions(
-        fixture.native("claude-acp"),
-        fs::Permissions::from_mode(0o400),
-    )
-    .unwrap();
-    let saved = fixture.save(hook(), &fixture.read());
-    assert!(saved.targets.iter().all(|t| t.issue.is_some()));
-    assert_eq!(fs::read_to_string(outside).unwrap(), "{}");
-    assert_eq!(
-        fs::metadata(fixture.native("claude-acp"))
-            .unwrap()
-            .permissions()
-            .mode()
-            & 0o777,
-        0o400
-    );
-}
-
-fn draft(hook: &Hook) -> Draft {
-    Draft {
-        id: hook.id.clone(),
-        name: hook.name.clone(),
-        description: hook.description.clone(),
-        event: hook.event,
-        matcher: hook.matcher,
-        command: hook.command.clone(),
-        timeout_text: hook
-            .timeout_seconds
-            .map(|s| s.to_string())
-            .unwrap_or_default(),
-        agents: hook.agents.clone(),
-    }
-}
-
-/// The shared fixture pins every field-level code both editors localize, so a
-/// platform cannot accept a draft that `save` would later reject.
-#[test]
-fn draft_validation_matches_the_shared_fixture_and_the_save_rules() {
-    let fixture: Value = serde_json::from_str(include_str!(
-        "../../../fixtures/agent/hook-draft-validation-v1.json"
-    ))
-    .unwrap();
-    for case in fixture["cases"].as_array().unwrap() {
-        let request: DraftRequest = serde_json::from_value(case["request"].clone()).unwrap();
-        let result = serde_json::to_value(validate_draft(&request)).unwrap();
-        assert_eq!(result, case["expected"], "{}", case["name"]);
-    }
-}
-
-#[test]
-fn every_draft_accepted_by_the_editor_is_accepted_by_save_validation() {
-    let base = hook();
-    let mut timed = base.clone();
-    timed.timeout_seconds = Some(MAX_TIMEOUT_SECONDS);
-    let mut tool = base.clone();
-    tool.event = Event::BeforeTool;
-    tool.matcher = Matcher::Edit;
-    for accepted in [base.clone(), timed, tool] {
-        let verdict = validate_draft(&DraftRequest {
-            hook: draft(&accepted),
-            existing_hooks: vec![],
-        });
-        assert!(verdict.valid, "{verdict:?}");
-        assert_eq!(verdict.timeout_seconds, accepted.timeout_seconds);
-        assert!(validate(&accepted).is_ok());
-    }
-    // Swift previously accepted these; the host always rejected them at save time.
-    let mut duplicate_agents = base.clone();
-    duplicate_agents.agents = vec!["codex-acp".into(), "codex-acp".into()];
-    let mut matcher = base.clone();
-    matcher.matcher = Matcher::Shell;
-    for rejected in [duplicate_agents, matcher] {
-        assert!(
-            !validate_draft(&DraftRequest {
-                hook: draft(&rejected),
-                existing_hooks: vec![]
-            })
-            .valid
-        );
-        assert!(validate(&rejected).is_err());
-    }
-}
diff --git a/rust/lithe-agent-host/src/install.rs b/rust/lithe-agent-host/src/install.rs
deleted file mode 100644
index 255f0b66..00000000
--- a/rust/lithe-agent-host/src/install.rs
+++ /dev/null
@@ -1,1041 +0,0 @@
-//! One-click installation of ACP adapters with the user's own npm.
-//!
-//! Each adapter lives in `<data>/agents/<id>` with a `lithe-agent.json` marker
-//! naming the installed version. Installs run in a staging directory that
-//! replaces the old one only after npm succeeded and the executable exists, so
-//! a failed or cancelled install never breaks a working adapter.
-
-use std::path::{Path, PathBuf};
-use std::process::Command;
-use std::sync::{Mutex, OnceLock};
-use std::time::Duration;
-
-use serde::{Deserialize, Serialize};
-
-use crate::catalog::{AgentCli, CatalogAgent, ProviderProtocol, CATALOG};
-use crate::cli_update::{self, CliInstallation, CliSource};
-use crate::environment::{self, DetectedTool, RunError, RuntimeEnvironment};
-
-const INSTALL_TIMEOUT: Duration = Duration::from_secs(15 * 60);
-const MARKER: &str = "lithe-agent.json";
-/// Characters of npm output kept for a failure report.
-const OUTPUT_TAIL: usize = 2000;
-
-// Install and uninstall share fixed per-agent paths. Serialize mutations in
-// this host process so one request cannot remove or replace another request's
-// staging directory or rollback marker.
-static INSTALL_MUTEX: OnceLock<Mutex<()>> = OnceLock::new();
-
-fn install_lock() -> std::sync::MutexGuard<'static, ()> {
-    INSTALL_MUTEX
-        .get_or_init(|| Mutex::new(()))
-        .lock()
-        .expect("agent install lock should not be poisoned")
-}
-
-/// Verified CLI version, with bounded installer diagnostics when it reported failure.
-#[derive(Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct CliUpdateResult {
-    pub cli_version: String,
-    /// A warning only after a newly installed or strictly newer usable CLI is verified.
-    pub updater_warning: Option<String>,
-}
-
-/// Why a management request failed; hosts map these to stable error codes.
-#[derive(Debug, PartialEq, Eq)]
-pub enum ManagementError {
-    UnknownAgent(String),
-    RuntimeMissing(String),
-    Failed(String),
-    Cancelled,
-    TimedOut,
-}
-
-impl ManagementError {
-    pub fn message(&self) -> String {
-        match self {
-            Self::UnknownAgent(id) => format!("Unknown agent `{id}`"),
-            Self::RuntimeMissing(message) | Self::Failed(message) => message.clone(),
-            Self::Cancelled => "The installation was cancelled".into(),
-            Self::TimedOut => "The installation did not finish in time".into(),
-        }
-    }
-}
-
-#[derive(Debug, Deserialize, Serialize)]
-struct Marker {
-    id: String,
-    version: String,
-}
-
-/// The user's own agent CLI that an adapter drives.
-#[derive(Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct CliStatus {
-    pub name: String,
-    pub command: String,
-    pub minimum_version: String,
-    pub install_hint: String,
-    /// npm package Lithe installs globally on request.
-    pub package: String,
-    pub detected: Option<DetectedTool>,
-    pub installation: Option<CliInstallation>,
-}
-
-/// Status of one catalog agent on this machine.
-#[derive(Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct AgentStatus {
-    pub id: String,
-    pub name: String,
-    pub description: String,
-    pub package: String,
-    /// Version Lithe installs.
-    pub version: String,
-    pub installed_version: Option<String>,
-    /// Whether the verified catalog target is strictly newer than the local adapter.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub update_available: Option<bool>,
-    pub protocol: ProviderProtocol,
-    pub minimum_node_major: u32,
-    pub verified: bool,
-    /// The user's CLI this adapter runs, when it does not bundle one.
-    pub cli: Option<CliStatus>,
-    /// User-facing reasons the agent cannot be installed or started now.
-    pub issues: Vec<String>,
-}
-
-/// Runtime detection plus every catalog agent's status.
-#[derive(Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct ManagementStatus {
-    pub environment: RuntimeEnvironment,
-    pub agents: Vec<AgentStatus>,
-}
-
-/// Detect the runtime and report each catalog agent's installation state.
-pub fn status(data_directory: &Path, cancel: &dyn Fn() -> bool) -> ManagementStatus {
-    let environment = environment::detect(cancel);
-    status_with(
-        data_directory,
-        environment.clone(),
-        &|command| environment::detect_tool(command, cancel),
-        &|cli| {
-            Some(
-                cli_update::detect(cli, &environment, cancel)
-                    .map(|mut plan| {
-                        if let Some(installed) = environment::detect_tool(cli.command, cancel) {
-                            match cli_update::update_available(
-                                &plan,
-                                &installed.version,
-                                environment::search_path().as_deref(),
-                                cancel,
-                            ) {
-                                Ok(Some(check)) => {
-                                    plan.installation.update_available = Some(check.available);
-                                    plan.installation.available_version = check.version;
-                                }
-                                Ok(None) => {}
-                                Err(error) => {
-                                    plan.installation.update_check_error = Some(error.message())
-                                }
-                            }
-                        }
-                        plan.installation
-                    })
-                    .unwrap_or_else(|error| CliInstallation {
-                        source: CliSource::Unknown,
-                        can_update: false,
-                        update_hint: cli_update::MANUAL_HINT.into(),
-                        update_available: None,
-                        update_check_error: Some(error.message()),
-                        available_version: None,
-                    }),
-            )
-        },
-    )
-}
-
-/// Catalog statuses for an already detected runtime; `find_cli` looks up an
-/// agent CLI on the search path and `find_installation` supplies ownership evidence.
-pub(crate) fn status_with(
-    data_directory: &Path,
-    environment: RuntimeEnvironment,
-    find_cli: &dyn Fn(&str) -> Option<DetectedTool>,
-    find_installation: &dyn Fn(&AgentCli) -> Option<CliInstallation>,
-) -> ManagementStatus {
-    let agents = CATALOG
-        .iter()
-        .map(|agent| {
-            let cli = agent.cli.as_ref().map(|cli| CliStatus {
-                name: cli.name.into(),
-                command: cli.command.into(),
-                minimum_version: cli.minimum_version.into(),
-                install_hint: cli.install_hint.into(),
-                package: cli.package.into(),
-                detected: find_cli(cli.command),
-                installation: find_installation(cli),
-            });
-            let mut issues = runtime_issues(agent, &environment);
-            if let (Some(cli), Some(status)) = (&agent.cli, &cli) {
-                issues.extend(cli_issue(cli, status.detected.as_ref()));
-            }
-            let installed_version = installed_version(data_directory, agent);
-            let update_available = installed_version.as_deref().and_then(|installed| {
-                environment::newer_version_available(installed, agent.version)
-            });
-            AgentStatus {
-                id: agent.id.into(),
-                name: agent.name.into(),
-                description: agent.description.into(),
-                package: agent.package.into(),
-                version: agent.version.into(),
-                installed_version,
-                update_available,
-                protocol: agent.protocol,
-                minimum_node_major: agent.minimum_node_major,
-                verified: agent.verified,
-                cli,
-                issues,
-            }
-        })
-        .collect();
-    ManagementStatus {
-        environment,
-        agents,
-    }
-}
-
-/// Why the user's CLI cannot be used, if it is missing or too old.
-pub(crate) fn cli_issue(cli: &AgentCli, detected: Option<&DetectedTool>) -> Option<String> {
-    match detected {
-        None => Some(format!(
-            "{} was not found. Install it (for example `{}`), then check again.",
-            cli.name, cli.install_hint
-        )),
-        Some(tool) if !environment::version_at_least(&tool.version, cli.minimum_version) => {
-            Some(format!(
-                "{} {} or later is required; found {}. Update it, then check again.",
-                cli.name, cli.minimum_version, tool.version
-            ))
-        }
-        Some(_) => None,
-    }
-}
-
-fn runtime_issues(agent: &CatalogAgent, environment: &RuntimeEnvironment) -> Vec<String> {
-    let mut issues = Vec::new();
-    match environment.node_major() {
-        None => issues.push(format!(
-            "Node.js {} or later was not found. Install it, then check again.",
-            agent.minimum_node_major
-        )),
-        Some(major) if major < agent.minimum_node_major => issues.push(format!(
-            "{} needs Node.js {} or later; found {}.",
-            agent.name,
-            agent.minimum_node_major,
-            environment
-                .node
-                .as_ref()
-                .map_or("", |node| node.version.as_str())
-        )),
-        Some(_) => {}
-    }
-    if environment.npm.is_none() {
-        issues.push("npm was not found. It is normally installed with Node.js.".into());
-    }
-    issues
-}
-
-/// Installed adapter directory for `agent`.
-pub fn agent_directory(data_directory: &Path, agent: &CatalogAgent) -> PathBuf {
-    data_directory.join("agents").join(agent.id)
-}
-
-/// Executable of an installed adapter.
-pub fn installed_command(data_directory: &Path, agent: &CatalogAgent) -> PathBuf {
-    bin_path(&agent_directory(data_directory, agent), agent)
-}
-
-fn bin_path(root: &Path, agent: &CatalogAgent) -> PathBuf {
-    let name = if cfg!(windows) {
-        format!("{}.cmd", agent.bin)
-    } else {
-        agent.bin.to_owned()
-    };
-    root.join("node_modules").join(".bin").join(name)
-}
-
-/// Version recorded by a complete install whose executable still exists.
-pub fn installed_version(data_directory: &Path, agent: &CatalogAgent) -> Option<String> {
-    let root = agent_directory(data_directory, agent);
-    let marker: Marker = serde_json::from_slice(&std::fs::read(root.join(MARKER)).ok()?).ok()?;
-    (marker.id == agent.id && bin_path(&root, agent).exists()).then_some(marker.version)
-}
-
-/// Live npm transfer counters. The package set and its total size are not known
-/// in advance, so these counters intentionally do not claim an overall percentage.
-#[derive(Clone, Debug, Deserialize, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct InstallProgress {
-    pub stage: InstallStage,
-    pub downloaded_bytes: u64,
-    pub bytes_per_second: u64,
-    pub elapsed_milliseconds: u64,
-    /// Time since the last received package bytes; not an install timeout.
-    pub idle_milliseconds: u64,
-}
-
-/// Observable npm stage, independent of whether the overall install succeeded.
-#[derive(Clone, Debug, Deserialize, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub enum InstallStage {
-    Preparing,
-    Downloading,
-    Installing,
-    /// An external CLI updater owns its transfer and does not expose byte counters.
-    Updating,
-}
-
-impl InstallProgress {
-    fn preparing() -> Self {
-        Self {
-            stage: InstallStage::Preparing,
-            downloaded_bytes: 0,
-            bytes_per_second: 0,
-            elapsed_milliseconds: 0,
-            idle_milliseconds: 0,
-        }
-    }
-}
-
-/// Load a built-in, numbers-only observer in npm's Node process. A data URL
-/// avoids writing executable helpers or a second download cache to disk.
-fn observe_npm(command: &mut Command) {
-    let original = std::env::var("NODE_OPTIONS").unwrap_or_default();
-    let encoded = include_bytes!("npm-progress.mjs")
-        .iter()
-        .map(|byte| format!("%{byte:02X}"))
-        .collect::<String>();
-    command
-        .env("LITHE_NPM_ORIGINAL_NODE_OPTIONS", &original)
-        .env(
-            "NODE_OPTIONS",
-            format!("{original} --import=data:text/javascript,{encoded}"),
-        );
-}
-
-fn run_observed_npm(
-    command: &mut Command,
-    cancel: &dyn Fn() -> bool,
-    progress: &dyn Fn(InstallProgress),
-) -> Result<(bool, String), environment::RunError> {
-    observe_npm(command);
-    environment::run_bounded_status_observed(command, INSTALL_TIMEOUT, cancel, &mut |line| {
-        if let Some(json) = line.strip_prefix("LITHE_NPM_PROGRESS ") {
-            if let Ok(event) = serde_json::from_str::<InstallProgress>(json.trim()) {
-                progress(event);
-            }
-        }
-    })
-}
-
-/// Install or replace `agent_id` with its pinned version using the user's npm.
-pub fn install(
-    data_directory: &Path,
-    agent_id: &str,
-    cancel: &dyn Fn() -> bool,
-) -> Result<String, ManagementError> {
-    install_with_progress(data_directory, agent_id, cancel, &|_| {})
-}
-
-/// Installs an adapter and publishes live npm counters on the calling thread.
-pub fn install_with_progress(
-    data_directory: &Path,
-    agent_id: &str,
-    cancel: &dyn Fn() -> bool,
-    progress: &dyn Fn(InstallProgress),
-) -> Result<String, ManagementError> {
-    let _lock = install_lock();
-    progress(InstallProgress::preparing());
-    let agent = crate::catalog::find(agent_id)
-        .ok_or_else(|| ManagementError::UnknownAgent(agent_id.into()))?;
-    let environment = environment::detect(cancel);
-    // Detection returns an optional snapshot so callers can report missing
-    // tools, but cancellation must retain its original error semantics.
-    if cancel() {
-        return Err(ManagementError::Cancelled);
-    }
-    if let Some(issue) = runtime_issues(agent, &environment).into_iter().next() {
-        return Err(ManagementError::RuntimeMissing(issue));
-    }
-    let npm = environment
-        .npm
-        .as_ref()
-        .map(|npm| npm.path.clone())
-        .ok_or_else(|| ManagementError::RuntimeMissing("npm was not found".into()))?;
-    let agents = data_directory.join("agents");
-    let staging = agents.join(format!(".{}.installing", agent.id));
-    crate::failure_log::cleanup(
-        "agent.host.operation_failed",
-        "install_staging_cleanup",
-        std::fs::remove_dir_all(&staging),
-    );
-    std::fs::create_dir_all(&staging).map_err(|error| {
-        ManagementError::Failed(format!("Could not create {}: {error}", staging.display()))
-    })?;
-    let result = run_npm_install_observed(&npm, &staging, agent, cancel, progress).and_then(|()| {
-        if cancel() {
-            return Err(ManagementError::Cancelled);
-        }
-        if !bin_path(&staging, agent).exists() {
-            return Err(ManagementError::Failed(format!(
-                "npm finished, but `{}` was not installed",
-                agent.bin
-            )));
-        }
-        let marker = serde_json::to_vec(&Marker {
-            id: agent.id.into(),
-            version: agent.version.into(),
-        })
-        .map_err(|error| ManagementError::Failed(error.to_string()))?;
-        std::fs::write(staging.join(MARKER), marker)
-            .map_err(|error| ManagementError::Failed(error.to_string()))?;
-        if cancel() {
-            return Err(ManagementError::Cancelled);
-        }
-        replace_directory(&staging, &agent_directory(data_directory, agent))
-    });
-    if result.is_err() {
-        crate::failure_log::cleanup(
-            "agent.host.operation_failed",
-            "install_staging_cleanup",
-            std::fs::remove_dir_all(&staging),
-        );
-    }
-    result.map(|()| agent.version.to_owned())
-}
-
-/// Install a missing CLI with npm or update it using its verified installation owner.
-///
-/// Runs only on an explicit click; unknown owners require manual updating.
-pub fn install_cli(
-    agent_id: &str,
-    cancel: &dyn Fn() -> bool,
-) -> Result<CliUpdateResult, ManagementError> {
-    install_cli_with_progress(agent_id, cancel, &|_| {})
-}
-
-/// Updates through the verified installation owner, publishing only available progress.
-pub fn install_cli_with_progress(
-    agent_id: &str,
-    cancel: &dyn Fn() -> bool,
-    progress: &dyn Fn(InstallProgress),
-) -> Result<CliUpdateResult, ManagementError> {
-    progress(InstallProgress::preparing());
-    let agent = crate::catalog::find(agent_id)
-        .ok_or_else(|| ManagementError::UnknownAgent(agent_id.into()))?;
-    let cli = agent.cli.as_ref().ok_or_else(|| {
-        ManagementError::Failed(format!("{} does not use a separate CLI", agent.name))
-    })?;
-    let environment = environment::detect(cancel);
-    let plan = cli_update::detect(cli, &environment, cancel)?;
-    let was_missing = plan.installation.source == CliSource::Missing;
-    let updater = plan.command.ok_or_else(|| {
-        ManagementError::Failed(format!(
-            "{} cannot be updated automatically. {}",
-            cli.name, plan.installation.update_hint
-        ))
-    })?;
-    let previous = environment::detect_tool(cli.command, cancel);
-    let result = run_cli_updater(
-        &updater,
-        environment::search_path().as_deref(),
-        cancel,
-        progress,
-    );
-    finish_cli_update(cli, previous.as_ref(), was_missing, result, || {
-        // Even a nonzero exit can follow an upstream download retry that succeeded.
-        // Verify the CLI the Agent actually runs, without interpreting log wording.
-        environment::detect(cancel);
-        if cancel() {
-            return Err(ManagementError::Cancelled);
-        }
-        let detected = environment::detect_tool(cli.command, cancel);
-        if cancel() {
-            return Err(ManagementError::Cancelled);
-        }
-        Ok(detected)
-    })
-}
-
-fn finish_cli_update(
-    cli: &AgentCli,
-    previous: Option<&DetectedTool>,
-    was_missing: bool,
-    result: Result<(bool, String), RunError>,
-    detect: impl FnOnce() -> Result<Option<DetectedTool>, ManagementError>,
-) -> Result<CliUpdateResult, ManagementError> {
-    let (success, output) = match result {
-        Ok(completed) => completed,
-        Err(RunError::Cancelled) => return Err(ManagementError::Cancelled),
-        Err(RunError::TimedOut) => return Err(ManagementError::TimedOut),
-        Err(RunError::Start(message)) => {
-            return Err(ManagementError::Failed(format!(
-                "Could not run the CLI updater: {message}"
-            )))
-        }
-    };
-    let detected = detect()?;
-    let verified = verify_updated_cli(cli, detected);
-    if !success {
-        // An already usable CLI does not prove a failed update installed anything.
-        let advanced = verified.as_ref().is_ok_and(|version| {
-            previous.map_or(was_missing, |old| {
-                !environment::version_at_least(&old.version, version)
-            })
-        });
-        if !advanced {
-            let verification = verified
-                .err()
-                .map(|error| format!("\n{}", error.message()))
-                .unwrap_or_default();
-            return Err(ManagementError::Failed(format!(
-                "Could not update {} using its installation manager:\n{}{}",
-                cli.name,
-                tail(&output),
-                verification
-            )));
-        }
-    }
-    Ok(CliUpdateResult {
-        cli_version: verified?,
-        updater_warning: (!success).then(|| tail(&output)),
-    })
-}
-
-fn run_cli_updater(
-    updater: &cli_update::UpdateCommand,
-    path: Option<&std::ffi::OsStr>,
-    cancel: &dyn Fn() -> bool,
-    progress: &dyn Fn(InstallProgress),
-) -> Result<(bool, String), RunError> {
-    let mut command = Command::new(&updater.program);
-    command.args(&updater.arguments);
-    if let Some(path) = path {
-        command.env("PATH", path);
-    }
-    if cancel() {
-        return Err(RunError::Cancelled);
-    }
-    if updater.observes_npm {
-        run_observed_npm(&mut command, cancel, progress)
-    } else {
-        progress(InstallProgress {
-            stage: InstallStage::Updating,
-            ..InstallProgress::preparing()
-        });
-        if cancel() {
-            return Err(RunError::Cancelled);
-        }
-        command
-            .env("HOMEBREW_NO_ASK", "1")
-            .env("HOMEBREW_NO_ANALYTICS", "1");
-        environment::run_bounded_status(&mut command, INSTALL_TIMEOUT, cancel)
-    }
-}
-
-fn verify_updated_cli(
-    cli: &AgentCli,
-    detected: Option<DetectedTool>,
-) -> Result<String, ManagementError> {
-    let tool = detected.ok_or_else(|| ManagementError::Failed(format!(
-        "The updater finished, but `{}` was not found on PATH. Check the CLI installation and PATH, then check again.", cli.command
-    )))?;
-    if !environment::version_at_least(&tool.version, cli.minimum_version) {
-        return Err(ManagementError::Failed(format!(
-            "The updater finished, but PATH still selects {} {} at {}. Version {} or later is required; check pinned versions and conflicting installations.",
-            cli.name, tool.version, tool.path.display(), cli.minimum_version
-        )));
-    }
-    Ok(tool.version)
-}
-
-/// Remove an installed adapter. Removing a missing adapter succeeds.
-pub fn uninstall(data_directory: &Path, agent_id: &str) -> Result<(), ManagementError> {
-    let _lock = install_lock();
-    let agent = crate::catalog::find(agent_id)
-        .ok_or_else(|| ManagementError::UnknownAgent(agent_id.into()))?;
-    match std::fs::remove_dir_all(agent_directory(data_directory, agent)) {
-        Err(error) if error.kind() != std::io::ErrorKind::NotFound => Err(ManagementError::Failed(
-            format!("Could not remove {}: {error}", agent.name),
-        )),
-        _ => Ok(()),
-    }
-}
-
-#[cfg(test)]
-fn run_npm_install(
-    npm: &Path,
-    prefix: &Path,
-    agent: &CatalogAgent,
-    cancel: &dyn Fn() -> bool,
-) -> Result<(), ManagementError> {
-    run_npm_install_observed(npm, prefix, agent, cancel, &|_| {})
-}
-
-fn run_npm_install_observed(
-    npm: &Path,
-    prefix: &Path,
-    agent: &CatalogAgent,
-    cancel: &dyn Fn() -> bool,
-    progress: &dyn Fn(InstallProgress),
-) -> Result<(), ManagementError> {
-    let mut command = Command::new(npm);
-    command.arg("install").arg("--prefix").arg(prefix).args([
-        "--no-audit",
-        "--no-fund",
-        "--omit=dev",
-        "--loglevel=error",
-    ]);
-    if omit_optional(agent) {
-        command.arg("--omit=optional");
-    }
-    command
-        .arg(format!("{}@{}", agent.package, agent.version))
-        .current_dir(prefix);
-    if let Some(path) = environment::search_path() {
-        command.env("PATH", path);
-    }
-    match run_observed_npm(&mut command, cancel, progress) {
-        Ok((true, _)) => Ok(()),
-        Ok((false, output)) => Err(ManagementError::Failed(format!(
-            "npm could not install {}:\n{}",
-            agent.package,
-            tail(&output)
-        ))),
-        Err(RunError::Cancelled) => Err(ManagementError::Cancelled),
-        Err(RunError::TimedOut) => Err(ManagementError::TimedOut),
-        Err(RunError::Start(message)) => Err(ManagementError::Failed(format!(
-            "Could not run npm: {message}"
-        ))),
-    }
-}
-
-/// Adapters that drive the user's CLI normally skip their bundled copy, which
-/// is an optional dependency of several hundred megabytes. On Windows, Claude's
-/// adapter cannot receive an npm `.cmd` shim, so it needs the SDK's native
-/// launcher instead.
-fn omit_optional(agent: &CatalogAgent) -> bool {
-    agent
-        .cli
-        .as_ref()
-        .is_some_and(|cli| !cfg!(windows) || cli.accepts_windows_shim)
-}
-
-/// Swap `staging` into `target`, keeping the old install until the swap succeeds.
-fn replace_directory(staging: &Path, target: &Path) -> Result<(), ManagementError> {
-    let previous = target.with_file_name(format!(
-        ".{}.previous",
-        target
-            .file_name()
-            .and_then(|name| name.to_str())
-            .unwrap_or("agent")
-    ));
-    crate::failure_log::cleanup(
-        "agent.host.operation_failed",
-        "install_previous_cleanup",
-        std::fs::remove_dir_all(&previous),
-    );
-    let had_previous = target.exists();
-    if had_previous {
-        std::fs::rename(target, &previous).map_err(|error| {
-            ManagementError::Failed(format!("Could not replace the old install: {error}"))
-        })?;
-    }
-    if let Err(error) = std::fs::rename(staging, target) {
-        if had_previous {
-            crate::failure_log::io(
-                "agent.host.operation_failed",
-                "install_rollback",
-                std::fs::rename(&previous, target),
-            );
-        }
-        return Err(ManagementError::Failed(format!(
-            "Could not finish the install: {error}"
-        )));
-    }
-    crate::failure_log::cleanup(
-        "agent.host.operation_failed",
-        "install_previous_cleanup",
-        std::fs::remove_dir_all(&previous),
-    );
-    Ok(())
-}
-
-fn tail(output: &str) -> String {
-    let trimmed = output.trim();
-    let start = trimmed
-        .char_indices()
-        .rev()
-        .nth(OUTPUT_TAIL - 1)
-        .map_or(0, |(index, _)| index);
-    trimmed[start..].to_owned()
-}
-
-#[cfg(all(test, unix))]
-mod tests {
-    use super::*;
-    use crate::environment::DetectedTool;
-    use std::os::unix::fs::PermissionsExt;
-
-    fn temp_directory(name: &str) -> PathBuf {
-        let directory =
-            std::env::temp_dir().join(format!("lithe-install-{name}-{}", std::process::id()));
-        let _ = std::fs::remove_dir_all(&directory);
-        std::fs::create_dir_all(&directory).unwrap();
-        directory
-    }
-
-    /// Fake npm that creates the adapter executable, or fails when asked.
-    fn fake_npm(directory: &Path, succeed: bool) -> PathBuf {
-        let npm = directory.join("npm");
-        let script = if succeed {
-            "#!/bin/sh\nprefix=\"$3\"\nmkdir -p \"$prefix/node_modules/.bin\"\nprintf '#!/bin/sh\\n' > \"$prefix/node_modules/.bin/codex-acp\"\nchmod +x \"$prefix/node_modules/.bin/codex-acp\"\n"
-        } else {
-            "#!/bin/sh\necho 'npm ERR! 404 Not Found' >&2\nexit 1\n"
-        };
-        std::fs::write(&npm, script).unwrap();
-        std::fs::set_permissions(&npm, std::fs::Permissions::from_mode(0o755)).unwrap();
-        npm
-    }
-
-    fn codex() -> &'static CatalogAgent {
-        crate::catalog::find("codex-acp").unwrap()
-    }
-
-    fn cli_tool(version: &str) -> DetectedTool {
-        DetectedTool {
-            version: version.into(),
-            path: "/example/bin/codex".into(),
-        }
-    }
-
-    #[test]
-    fn cli_update_nonzero_exit_recovers_only_after_a_usable_version_advance() {
-        let cli = codex().cli.as_ref().unwrap();
-        let old = cli_tool("0.142.5");
-        let log = "Download failed; retry completed";
-        let result = finish_cli_update(cli, Some(&old), false, Ok((false, log.into())), || {
-            Ok(Some(cli_tool("0.161.1")))
-        })
-        .unwrap();
-        assert_eq!(result.cli_version, "0.161.1");
-        assert_eq!(result.updater_warning.as_deref(), Some(log));
-        let fresh = finish_cli_update(cli, None, true, Ok((false, log.into())), || {
-            Ok(Some(cli_tool("0.161.1")))
-        })
-        .unwrap();
-        assert_eq!(fresh.updater_warning.as_deref(), Some(log));
-    }
-
-    #[test]
-    fn cli_update_nonzero_exit_preserves_failures_without_verified_progress() {
-        let cli = codex().cli.as_ref().unwrap();
-        // Already usable, numerically equivalent, older, absent, and still-too-old
-        // versions must not turn an updater failure into success.
-        for (before, after) in [
-            ("0.161.1", Some("0.161.1")),
-            ("0.161.1", Some("v0.161.1")),
-            ("0.161.1", Some("0.160.1")),
-            ("0.142.5", Some("0.150.0")),
-            ("0.142.5", None),
-        ] {
-            let old = cli_tool(before);
-            let result = finish_cli_update(
-                cli,
-                Some(&old),
-                false,
-                Ok((false, "installer failure".into())),
-                || Ok(after.map(cli_tool)),
-            );
-            match result {
-                Err(ManagementError::Failed(message)) => {
-                    assert!(message.contains("installer failure"))
-                }
-                other => panic!("unverified update {before} -> {after:?}: {other:?}"),
-            }
-        }
-    }
-
-    #[test]
-    fn cli_update_unknown_previous_version_cannot_prove_recovery() {
-        let cli = codex().cli.as_ref().unwrap();
-        // A failed version probe of an existing executable is not evidence it was absent.
-        assert!(finish_cli_update(
-            cli,
-            None,
-            false,
-            Ok((false, "installer failure".into())),
-            || Ok(Some(cli_tool("0.161.1")))
-        )
-        .is_err());
-    }
-
-    #[test]
-    fn cli_update_clean_exit_still_verifies_path_without_a_warning() {
-        let cli = codex().cli.as_ref().unwrap();
-        let old = cli_tool("0.161.1");
-        let result = finish_cli_update(
-            cli,
-            Some(&old),
-            false,
-            Ok((true, "already current".into())),
-            || Ok(Some(cli_tool("0.161.1"))),
-        )
-        .unwrap();
-        assert_eq!(result.updater_warning, None);
-        for after in [None, Some("0.142.5")] {
-            assert!(
-                finish_cli_update(cli, Some(&old), false, Ok((true, String::new())), || Ok(
-                    after.map(cli_tool)
-                ))
-                .is_err()
-            );
-        }
-    }
-
-    #[test]
-    fn cli_update_cancel_timeout_and_start_failure_never_recover() {
-        let cli = codex().cli.as_ref().unwrap();
-        for (error, expected) in [
-            (RunError::Cancelled, ManagementError::Cancelled),
-            (RunError::TimedOut, ManagementError::TimedOut),
-            (
-                RunError::Start("not executable".into()),
-                ManagementError::Failed("Could not run the CLI updater: not executable".into()),
-            ),
-        ] {
-            assert_eq!(
-                finish_cli_update(cli, None, true, Err(error), || panic!(
-                    "must not probe after an incomplete update"
-                )),
-                Err(expected)
-            );
-        }
-        assert_eq!(
-            finish_cli_update(cli, None, true, Ok((false, String::new())), || Err(
-                ManagementError::Cancelled
-            )),
-            Err(ManagementError::Cancelled)
-        );
-    }
-
-    #[test]
-    fn cli_update_recovery_keeps_only_the_bounded_log_tail() {
-        let cli = codex().cli.as_ref().unwrap();
-        let result = finish_cli_update(
-            cli,
-            None,
-            true,
-            Ok((false, "界".repeat(OUTPUT_TAIL + 100))),
-            || Ok(Some(cli_tool("0.161.1"))),
-        )
-        .unwrap();
-        assert_eq!(result.updater_warning.unwrap().chars().count(), OUTPUT_TAIL);
-    }
-
-    #[test]
-    fn external_cli_update_runs_owned_arguments_and_checks_the_selected_version() {
-        let root = temp_directory("external-updater");
-        struct Cleanup(PathBuf);
-        impl Drop for Cleanup {
-            fn drop(&mut self) {
-                let _ = std::fs::remove_dir_all(&self.0);
-            }
-        }
-        let _cleanup = Cleanup(root.clone());
-        let manager = fake_npm(&root, true);
-        std::fs::write(&manager, "#!/bin/sh\nprintf '%s\\n' \"$@\"\n").unwrap();
-        let updater = cli_update::UpdateCommand {
-            program: manager,
-            arguments: vec![
-                "upgrade".into(),
-                "--cask".into(),
-                "codex; literal argument".into(),
-            ],
-            observes_npm: false,
-        };
-        let progress = std::cell::RefCell::new(Vec::new());
-        let (success, output) = run_cli_updater(&updater, None, &|| false, &|p| {
-            progress.borrow_mut().push(p)
-        })
-        .unwrap();
-        assert!(success);
-        assert_eq!(
-            output.lines().collect::<Vec<_>>(),
-            ["upgrade", "--cask", "codex; literal argument"]
-        );
-        assert_eq!(progress.borrow()[0].stage, InstallStage::Updating);
-        assert_eq!(progress.borrow()[0].downloaded_bytes, 0);
-        let cli = codex().cli.as_ref().unwrap();
-        let detected = |version: &str| {
-            Some(DetectedTool {
-                version: version.into(),
-                path: root.join("codex"),
-            })
-        };
-        assert!(
-            verify_updated_cli(cli, detected("0.142.5")).is_err(),
-            "an old CLI earlier in PATH cannot become success"
-        );
-        assert_eq!(
-            verify_updated_cli(cli, detected("0.160.1")).unwrap(),
-            "0.160.1"
-        );
-        assert!(verify_updated_cli(cli, None).is_err());
-        let cancelled = std::cell::Cell::new(false);
-        let result = run_cli_updater(&updater, None, &|| cancelled.get(), &|_| {
-            cancelled.set(true)
-        });
-        assert_eq!(result, Err(RunError::Cancelled));
-    }
-
-    #[test]
-    fn live_npm_progress_arrives_before_cancel_and_preserves_cancellation() {
-        use std::sync::atomic::{AtomicBool, Ordering};
-        // A fake npm reports bytes, then stays alive until the observer cancels.
-        // No network, installed npm, or sleep is needed to control this sequence.
-        let root = temp_directory("progress-cancel");
-        struct Cleanup(PathBuf);
-        impl Drop for Cleanup {
-            fn drop(&mut self) {
-                let _ = std::fs::remove_dir_all(&self.0);
-            }
-        }
-        let _cleanup = Cleanup(root.clone());
-        let npm = fake_npm(&root, true);
-        std::fs::write(&npm, r#"#!/bin/sh
-printf '%s\n' 'LITHE_NPM_PROGRESS {"stage":"downloading","downloadedBytes":1234,"bytesPerSecond":123,"elapsedMilliseconds":1000,"idleMilliseconds":0}'
-while :; do :; done
-"#).unwrap();
-        let cancelled = AtomicBool::new(false);
-        let received = std::cell::RefCell::new(Vec::new());
-        // If the observer regresses, stop the fake child locally rather than
-        // leaving it running until the production install timeout.
-        let deadline = std::time::Instant::now() + Duration::from_secs(3);
-        let result = run_npm_install_observed(
-            &npm,
-            &root,
-            codex(),
-            &|| cancelled.load(Ordering::SeqCst) || std::time::Instant::now() >= deadline,
-            &|event| {
-                received.borrow_mut().push(event);
-                cancelled.store(true, Ordering::SeqCst);
-            },
-        );
-        assert!(matches!(result, Err(ManagementError::Cancelled)));
-        assert_eq!(received.borrow().len(), 1);
-        assert_eq!(received.borrow()[0].downloaded_bytes, 1234);
-    }
-
-    #[test]
-    fn successful_install_replaces_the_previous_version_atomically() {
-        let data = temp_directory("ok");
-        let npm = fake_npm(&data, true);
-        let old = agent_directory(&data, codex());
-        std::fs::create_dir_all(&old).unwrap();
-        std::fs::write(old.join("stale"), "old").unwrap();
-
-        let staging = data.join("agents/.codex-acp.installing");
-        std::fs::create_dir_all(&staging).unwrap();
-        run_npm_install(&npm, &staging, codex(), &|| false).unwrap();
-        std::fs::write(
-            staging.join(MARKER),
-            r#"{"id":"codex-acp","version":"1.13.1"}"#,
-        )
-        .unwrap();
-        replace_directory(&staging, &old).unwrap();
-
-        assert_eq!(installed_version(&data, codex()).as_deref(), Some("1.13.1"));
-        assert!(!old.join("stale").exists());
-        assert!(!staging.exists());
-        assert!(installed_command(&data, codex()).exists());
-        uninstall(&data, "codex-acp").unwrap();
-        assert_eq!(installed_version(&data, codex()), None);
-        uninstall(&data, "codex-acp").unwrap();
-        let _ = std::fs::remove_dir_all(&data);
-    }
-
-    #[test]
-    fn npm_failure_reports_its_output_and_keeps_the_old_install() {
-        let data = temp_directory("fail");
-        let npm = fake_npm(&data, false);
-        let staging = data.join("staging");
-        std::fs::create_dir_all(&staging).unwrap();
-        match run_npm_install(&npm, &staging, codex(), &|| false) {
-            Err(ManagementError::Failed(message)) => {
-                assert!(message.contains("404 Not Found"), "{message}")
-            }
-            other => panic!("expected failure, got {other:?}"),
-        }
-        assert_eq!(
-            run_npm_install(&npm, &staging, codex(), &|| true),
-            Err(ManagementError::Cancelled)
-        );
-        let _ = std::fs::remove_dir_all(&data);
-    }
-
-    #[test]
-    fn cancellation_during_runtime_detection_is_not_reported_as_missing_node() {
-        let data = temp_directory("detect-cancel");
-        let result = install_with_progress(&data, "codex-acp", &|| true, &|_| {});
-        assert_eq!(result, Err(ManagementError::Cancelled));
-        let _ = std::fs::remove_dir_all(&data);
-    }
-
-    #[test]
-    fn missing_or_old_node_is_reported_per_agent() {
-        let tool = |version: &str| {
-            Some(DetectedTool {
-                version: version.into(),
-                path: "/bin/tool".into(),
-            })
-        };
-        let environment = |node: Option<DetectedTool>| RuntimeEnvironment {
-            node,
-            npm: tool("10.0.0"),
-            used_login_shell: true,
-        };
-        assert!(runtime_issues(codex(), &environment(tool("22.1.0"))).is_empty());
-        let claude = crate::catalog::find("claude-acp").unwrap();
-        let old = runtime_issues(claude, &environment(tool("20.11.0")));
-        assert_eq!(old.len(), 1);
-        assert!(old[0].contains("Node.js 22"), "{}", old[0]);
-        assert!(runtime_issues(codex(), &environment(None))[0].contains("was not found"));
-        assert!(uninstall(Path::new("/tmp"), "unknown").is_err());
-    }
-
-    #[test]
-    fn output_tail_keeps_the_end() {
-        let long = format!("{}END", "x".repeat(OUTPUT_TAIL * 2));
-        let tail = tail(&long);
-        assert!(tail.ends_with("END"));
-        assert!(tail.chars().count() <= OUTPUT_TAIL + 1);
-    }
-}
-
-#[cfg(test)]
-mod optional_dependency_tests {
-    use super::*;
-
-    #[test]
-    fn claude_keeps_its_bundled_launcher_only_on_windows() {
-        let codex = crate::catalog::find("codex-acp").unwrap();
-        let claude = crate::catalog::find("claude-acp").unwrap();
-
-        assert!(omit_optional(codex));
-        assert_eq!(omit_optional(claude), !cfg!(windows));
-    }
-}
diff --git a/rust/lithe-agent-host/src/instructions.rs b/rust/lithe-agent-host/src/instructions.rs
deleted file mode 100644
index d4d0774b..00000000
--- a/rust/lithe-agent-host/src/instructions.rs
+++ /dev/null
@@ -1,328 +0,0 @@
-//! Native global instruction files. The upstream Agent owns prompt loading;
-//! this adapter only resolves, reads and atomically saves the user's file.
-
-use std::fs::{self, File, OpenOptions};
-use std::io::{Read, Write};
-use std::path::{Path, PathBuf};
-use std::sync::Mutex;
-
-use serde::{Deserialize, Serialize};
-use sha2::{Digest, Sha256};
-
-pub mod shared;
-
-const MAX_BYTES: usize = 1024 * 1024;
-static SAVE_LOCK: Mutex<()> = Mutex::new(());
-
-/// Native user file snapshot; paths are display/write guards, not arbitrary inputs.
-#[derive(Clone, Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct InstructionFile {
-    pub agent_id: String,
-    pub path: PathBuf,
-    pub content: String,
-    pub exists: bool,
-    /// Digest includes absence, so creating an empty file invalidates an old draft.
-    pub revision: String,
-}
-
-/// A save must match both the selected native file and its previously read bytes.
-#[derive(Clone, Debug, Deserialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct SaveRequest {
-    pub agent_id: String,
-    pub content: String,
-    pub expected_path: PathBuf,
-    pub expected_revision: String,
-}
-
-/// Stable instruction-specific reason, carried in the Core envelope's details.
-#[derive(Debug)]
-pub struct InstructionError {
-    pub reason: &'static str,
-    pub message: &'static str,
-}
-
-fn error(reason: &'static str, message: &'static str) -> InstructionError {
-    InstructionError { reason, message }
-}
-
-fn io_error(_: std::io::Error) -> InstructionError {
-    error(
-        "file_access",
-        "Cannot access the global instruction file. Check its permissions and try again.",
-    )
-}
-
-/// Resolve the same environment-based profile inherited by native Agent launches.
-pub fn read(agent_id: &str) -> Result<InstructionFile, InstructionError> {
-    read_in(agent_id, &profile(agent_id)?)
-}
-
-/// Save user text without modifying repository instructions or Agent configuration.
-pub fn save(request: SaveRequest) -> Result<InstructionFile, InstructionError> {
-    let directory = profile(&request.agent_id)?;
-    save_in(request, &directory)
-}
-
-// Resolution stays outside Core and never derives a destination from packaged resources.
-pub(crate) fn profile(agent_id: &str) -> Result<PathBuf, InstructionError> {
-    let (variable, fallback) = match agent_id {
-        "codex-acp" => ("CODEX_HOME", ".codex"),
-        "claude-acp" => ("CLAUDE_CONFIG_DIR", ".claude"),
-        _ => {
-            return Err(error(
-                "unsupported_agent",
-                "Global instructions are available for Codex and Claude Code.",
-            ))
-        }
-    };
-    resolve_profile(
-        std::env::var_os(variable).map(PathBuf::from),
-        user_home().map(|home| home.join(fallback)),
-    )
-}
-
-fn user_home() -> Option<PathBuf> {
-    let variable = if cfg!(windows) { "USERPROFILE" } else { "HOME" };
-    std::env::var_os(variable)
-        .filter(|value| !value.is_empty())
-        .map(PathBuf::from)
-}
-
-fn resolve_profile(
-    configured: Option<PathBuf>,
-    fallback: Option<PathBuf>,
-) -> Result<PathBuf, InstructionError> {
-    let path = configured
-        .filter(|path| !path.as_os_str().is_empty())
-        .or(fallback)
-        .ok_or_else(|| error("profile_missing", "Cannot locate the Agent user directory."))?;
-    if !path.is_absolute() {
-        return Err(error("profile_relative", "The Agent user directory must be an absolute path. Check CODEX_HOME or CLAUDE_CONFIG_DIR."));
-    }
-    Ok(path)
-}
-
-fn read_in(agent_id: &str, directory: &Path) -> Result<InstructionFile, InstructionError> {
-    let filename = match agent_id {
-        "codex-acp" => {
-            let override_file = snapshot(agent_id, directory.join("AGENTS.override.md"))?;
-            if !override_file.content.trim().is_empty() {
-                return Ok(override_file);
-            }
-            "AGENTS.md"
-        }
-        "claude-acp" => "CLAUDE.md",
-        _ => {
-            return Err(error(
-                "unsupported_agent",
-                "Global instructions are available for Codex and Claude Code.",
-            ))
-        }
-    };
-    snapshot(agent_id, directory.join(filename))
-}
-
-pub(crate) fn snapshot(agent_id: &str, path: PathBuf) -> Result<InstructionFile, InstructionError> {
-    let metadata = match fs::symlink_metadata(&path) {
-        Ok(metadata) => Some(metadata),
-        Err(error) if error.kind() == std::io::ErrorKind::NotFound => None,
-        Err(error) => return Err(io_error(error)),
-    };
-    if metadata
-        .as_ref()
-        .is_some_and(|metadata| !metadata.file_type().is_file())
-    {
-        return Err(error(
-            "unsafe_file",
-            "The instruction path must be a regular file, not a symbolic link or directory.",
-        ));
-    }
-    let mut bytes = Vec::new();
-    if metadata.is_some() {
-        open_regular(&path)?
-            .take(MAX_BYTES as u64 + 1)
-            .read_to_end(&mut bytes)
-            .map_err(io_error)?;
-    }
-    if bytes.len() > MAX_BYTES {
-        return Err(error(
-            "file_too_large",
-            "Global instructions must be no larger than 1 MiB.",
-        ));
-    }
-    let content = String::from_utf8(bytes).map_err(|_| {
-        error(
-            "invalid_utf8",
-            "The global instruction file must use UTF-8 encoding.",
-        )
-    })?;
-    let exists = metadata.is_some();
-    let revision = format!(
-        "{:x}",
-        Sha256::digest([&[u8::from(exists)][..], content.as_bytes()].concat())
-    );
-    Ok(InstructionFile {
-        agent_id: agent_id.into(),
-        path,
-        content,
-        exists,
-        revision,
-    })
-}
-
-fn open_regular(path: &Path) -> Result<File, InstructionError> {
-    let mut options = OpenOptions::new();
-    options.read(true);
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::OpenOptionsExt;
-        // Do not follow a replacement symlink or block on a replacement FIFO.
-        options.custom_flags(libc::O_NOFOLLOW | libc::O_NONBLOCK);
-    }
-    #[cfg(windows)]
-    {
-        use std::os::windows::fs::OpenOptionsExt;
-        options.custom_flags(0x00200000); // FILE_FLAG_OPEN_REPARSE_POINT
-    }
-    let file = options.open(path).map_err(io_error)?;
-    let kind = file.metadata().map_err(io_error)?.file_type();
-    if !kind.is_file() || kind.is_symlink() {
-        return Err(error(
-            "unsafe_file",
-            "The instruction path must be a regular file, not a symbolic link or directory.",
-        ));
-    }
-    Ok(file)
-}
-
-fn save_in(request: SaveRequest, directory: &Path) -> Result<InstructionFile, InstructionError> {
-    let _guard = SAVE_LOCK
-        .try_lock()
-        .map_err(|_| error("busy", "Another instruction save is running. Try again."))?;
-    save_unlocked(request, directory)
-}
-
-fn save_unlocked(
-    request: SaveRequest,
-    directory: &Path,
-) -> Result<InstructionFile, InstructionError> {
-    if request.content.len() > MAX_BYTES {
-        return Err(error(
-            "file_too_large",
-            "Global instructions must be no larger than 1 MiB.",
-        ));
-    }
-    let previous = read_in(&request.agent_id, directory)?;
-    check_revision(&previous, &request)?;
-    write_snapshot(&previous, &request.content, || {
-        read_in(&request.agent_id, directory)
-    })?;
-    // Clearing an override can make AGENTS.md effective again. Return that actual source.
-    read_in(&request.agent_id, directory)
-}
-
-// Both the shared library and native files use the same guarded atomic replacement.
-// The caller holds SAVE_LOCK; the recheck also protects native precedence changes.
-pub(crate) fn write_snapshot(
-    previous: &InstructionFile,
-    content: &str,
-    recheck: impl Fn() -> Result<InstructionFile, InstructionError>,
-) -> Result<(), InstructionError> {
-    if content.len() > MAX_BYTES {
-        return Err(error(
-            "file_too_large",
-            "Global instructions must be no larger than 1 MiB.",
-        ));
-    }
-    let directory = previous
-        .path
-        .parent()
-        .ok_or_else(|| io_error(std::io::Error::other("missing parent")))?;
-    let permissions = if previous.exists {
-        let permissions = fs::metadata(&previous.path)
-            .map_err(io_error)?
-            .permissions();
-        if permissions.readonly() {
-            return Err(error(
-                "file_access",
-                "Cannot access the global instruction file. Check its permissions and try again.",
-            ));
-        }
-        Some(permissions)
-    } else {
-        None
-    };
-    let mut directories = fs::DirBuilder::new();
-    directories.recursive(true);
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::DirBuilderExt;
-        directories.mode(0o700);
-    }
-    directories.create(directory).map_err(io_error)?;
-    let parent = fs::canonicalize(directory).map_err(io_error)?;
-    let stage_path = parent.join(format!(".lithe-instructions-{}.tmp", uuid::Uuid::new_v4()));
-    let stage = StagedFile(stage_path.clone());
-    let mut options = OpenOptions::new();
-    options.write(true).create_new(true);
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::OpenOptionsExt;
-        options.mode(0o600);
-    }
-    let mut file = options.open(&stage_path).map_err(io_error)?;
-    file.write_all(content.as_bytes()).map_err(io_error)?;
-    if let Some(permissions) = permissions {
-        file.set_permissions(permissions).map_err(io_error)?;
-    }
-    file.sync_all().map_err(io_error)?;
-    drop(file);
-    // Detect edits/profile precedence changes made while preparing the write.
-    // Other applications do not share our lock, so this is an optimistic guard.
-    check_revision(
-        &recheck()?,
-        &SaveRequest {
-            agent_id: previous.agent_id.clone(),
-            content: String::new(),
-            expected_path: previous.path.clone(),
-            expected_revision: previous.revision.clone(),
-        },
-    )?;
-    if fs::canonicalize(directory).map_err(io_error)? != parent {
-        return Err(error(
-            "file_changed",
-            "The instruction directory changed. Reload before saving.",
-        ));
-    }
-    let target = parent.join(
-        previous
-            .path
-            .file_name()
-            .expect("native instruction filename"),
-    );
-    fs::rename(&stage.0, target).map_err(io_error)?;
-    Ok(())
-}
-
-fn check_revision(file: &InstructionFile, request: &SaveRequest) -> Result<(), InstructionError> {
-    if file.path != request.expected_path || file.revision != request.expected_revision {
-        return Err(error("file_changed", "Global instructions changed outside this editor. Your draft is kept; reload before saving."));
-    }
-    Ok(())
-}
-
-struct StagedFile(PathBuf);
-impl Drop for StagedFile {
-    fn drop(&mut self) {
-        crate::failure_log::cleanup(
-            "agent.host.operation_failed",
-            "instructions_staging_cleanup",
-            fs::remove_file(&self.0),
-        );
-    }
-}
-
-#[cfg(test)]
-mod tests;
diff --git a/rust/lithe-agent-host/src/instructions/shared.rs b/rust/lithe-agent-host/src/instructions/shared.rs
deleted file mode 100644
index 40c64814..00000000
--- a/rust/lithe-agent-host/src/instructions/shared.rs
+++ /dev/null
@@ -1,416 +0,0 @@
-//! User-owned shared text and guarded, per-Agent synchronization of a marked block.
-//! The platform supplies its writable application-support directory; opening the
-//! page is read-only. No prompt injection, package writes or background sync occurs.
-
-use super::*;
-use fs2::FileExt;
-
-const BEGIN: &str = "<!-- LITHE:SHARED-INSTRUCTIONS:BEGIN -->";
-const END: &str = "<!-- LITHE:SHARED-INSTRUCTIONS:END -->";
-const AGENTS: [&str; 2] = ["codex-acp", "claude-acp"];
-
-/// Platform-selected storage plus an explicit read, text save or Agent switch.
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct Request {
-    pub data_directory: PathBuf,
-    #[serde(flatten)]
-    pub action: Action,
-}
-
-/// Writes always name the source revision and the native snapshots being changed.
-#[derive(Deserialize)]
-#[serde(tag = "action", rename_all = "camelCase", deny_unknown_fields)]
-pub enum Action {
-    Read {},
-    Save {
-        content: String,
-        #[serde(rename = "expectedRevision")]
-        expected_revision: String,
-        files: Vec<FileGuard>,
-    },
-    SetEnabled {
-        #[serde(rename = "agentId")]
-        agent_id: String,
-        enabled: bool,
-        #[serde(rename = "expectedRevision")]
-        expected_revision: String,
-        file: FileGuard,
-    },
-}
-
-/// A native path is only a snapshot guard; destinations are resolved by the host.
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct FileGuard {
-    pub agent_id: String,
-    pub path: PathBuf,
-    pub revision: String,
-}
-
-/// Enabled state comes from actual file bytes, never from a persisted switch value.
-#[derive(Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct AgentState {
-    pub agent_id: String,
-    pub file: Option<InstructionFile>,
-    pub enabled: Option<bool>,
-    pub needs_sync: bool,
-    pub own_line_count: usize,
-    pub issue: Option<String>,
-}
-
-/// A text save can succeed while one Agent fails; every failure stays visible.
-#[derive(Serialize)]
-pub struct Library {
-    pub file: InstructionFile,
-    pub agents: Vec<AgentState>,
-}
-
-/// Execute a bounded operation. Cancellation is observed between native writes;
-/// completed file replacements remain committed and are reported by the next read.
-pub fn execute(
-    request: Request,
-    cancelled: &impl Fn() -> bool,
-) -> Result<Library, InstructionError> {
-    if !request.data_directory.is_absolute() {
-        return Err(error(
-            "profile_relative",
-            "The shared instruction directory must be absolute.",
-        ));
-    }
-    execute_in(request, &profile, cancelled, &SAVE_LOCK)
-}
-
-fn execute_in(
-    request: Request,
-    resolve: &impl Fn(&str) -> Result<PathBuf, InstructionError>,
-    cancelled: &impl Fn() -> bool,
-    write_lock: &Mutex<()>,
-) -> Result<Library, InstructionError> {
-    let path = request.data_directory.join("Shared.md");
-    if matches!(request.action, Action::Read {}) {
-        return library(snapshot("shared", path)?, resolve);
-    }
-    let _guard = write_lock
-        .try_lock()
-        .map_err(|_| error("busy", "Another instruction save is running. Try again."))?;
-    let before = snapshot("shared", path.clone())?;
-    let expected = match &request.action {
-        Action::Save {
-            expected_revision, ..
-        }
-        | Action::SetEnabled {
-            expected_revision, ..
-        } => expected_revision,
-        Action::Read {} => unreachable!(),
-    };
-    if &before.revision != expected {
-        return Err(error(
-            "file_changed",
-            "Shared instructions changed outside this editor. Reload before saving.",
-        ));
-    }
-    // One nonblocking OS lock protects separate Lithe processes sharing this library.
-    // Its persistent empty file is user state, never a transferable build resource.
-    match &request.action {
-        Action::Save { content, files, .. } => {
-            validate_text(content)?;
-            let ids: std::collections::HashSet<_> =
-                files.iter().map(|file| file.agent_id.as_str()).collect();
-            if files.len() > AGENTS.len()
-                || ids.len() != files.len()
-                || ids.iter().any(|id| !AGENTS.contains(id))
-            {
-                return Err(error(
-                    "invalid_request",
-                    "Invalid shared instruction request.",
-                ));
-            }
-        }
-        Action::SetEnabled { agent_id, file, .. }
-            if !AGENTS.contains(&agent_id.as_str()) || file.agent_id != *agent_id =>
-        {
-            return Err(error(
-                "unsupported_agent",
-                "Global instructions are available for Codex and Claude Code.",
-            ));
-        }
-        _ => {}
-    }
-    if cancelled() {
-        return Err(error(
-            "cancelled",
-            "Instruction synchronization was cancelled.",
-        ));
-    }
-    let mut directories = fs::DirBuilder::new();
-    directories.recursive(true);
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::DirBuilderExt;
-        directories.mode(0o700);
-    }
-    directories
-        .create(&request.data_directory)
-        .map_err(io_error)?;
-    let lock_path = request.data_directory.join(".sync.lock");
-    let mut options = OpenOptions::new();
-    options.read(true).write(true).create(true).truncate(false);
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::OpenOptionsExt;
-        options
-            .mode(0o600)
-            .custom_flags(libc::O_NOFOLLOW | libc::O_NONBLOCK);
-    }
-    #[cfg(windows)]
-    {
-        use std::os::windows::fs::OpenOptionsExt;
-        options.custom_flags(0x00200000); // FILE_FLAG_OPEN_REPARSE_POINT
-    }
-    let lock = options.open(lock_path).map_err(io_error)?;
-    let kind = lock.metadata().map_err(io_error)?.file_type();
-    if !kind.is_file() || kind.is_symlink() {
-        return Err(error(
-            "unsafe_file",
-            "The instruction path must be a regular file, not a symbolic link or directory.",
-        ));
-    }
-    lock.try_lock_exclusive()
-        .map_err(|_| error("busy", "Another instruction save is running. Try again."))?;
-    if snapshot("shared", path.clone())?.revision != before.revision {
-        return Err(error(
-            "file_changed",
-            "Shared instructions changed outside this editor. Reload before saving.",
-        ));
-    }
-    let mut failures = Vec::new();
-    match request.action {
-        Action::Save { content, files, .. } => {
-            validate_text(&content)?;
-            if files.len() > AGENTS.len() {
-                return Err(error(
-                    "invalid_request",
-                    "Invalid shared instruction request.",
-                ));
-            }
-            write_snapshot(&before, &content, || snapshot("shared", path.clone()))?;
-            // Commit the source first. Failed targets retain their old block and
-            // expose needsSync; retrying is explicit and does not lose user text.
-            for agent in AGENTS {
-                let result = (|| {
-                    if cancelled() {
-                        return Err(error(
-                            "cancelled",
-                            "Instruction synchronization was cancelled.",
-                        ));
-                    }
-                    let directory = resolve(agent)?;
-                    let current = read_in(agent, &directory)?;
-                    if block(&current.content)?.is_none() {
-                        return Ok(());
-                    }
-                    let guard = files
-                        .iter()
-                        .find(|file| file.agent_id == agent)
-                        .ok_or_else(|| {
-                            error(
-                                "file_changed",
-                                "Reload this Agent before synchronizing instructions.",
-                            )
-                        })?;
-                    sync(&current, guard, Some(&content), &directory)
-                })();
-                if let Err(err) = result {
-                    failures.push((agent.to_string(), err.message.to_string()));
-                }
-            }
-        }
-        Action::SetEnabled {
-            agent_id,
-            enabled,
-            file,
-            ..
-        } => {
-            if !AGENTS.contains(&agent_id.as_str()) || file.agent_id != agent_id {
-                return Err(error(
-                    "unsupported_agent",
-                    "Global instructions are available for Codex and Claude Code.",
-                ));
-            }
-            if cancelled() {
-                return Err(error(
-                    "cancelled",
-                    "Instruction synchronization was cancelled.",
-                ));
-            }
-            let directory = resolve(&agent_id)?;
-            let current = read_in(&agent_id, &directory)?;
-            sync(
-                &current,
-                &file,
-                enabled.then_some(before.content.as_str()),
-                &directory,
-            )?;
-        }
-        Action::Read {} => unreachable!(),
-    }
-    let mut result = library(snapshot("shared", path)?, resolve)?;
-    for (agent, message) in failures {
-        if let Some(state) = result
-            .agents
-            .iter_mut()
-            .find(|state| state.agent_id == agent)
-        {
-            state.issue = Some(message);
-        }
-    }
-    Ok(result)
-}
-
-fn library(
-    file: InstructionFile,
-    resolve: &impl Fn(&str) -> Result<PathBuf, InstructionError>,
-) -> Result<Library, InstructionError> {
-    let agents = AGENTS
-        .iter()
-        .map(|agent| {
-            let result = resolve(agent).and_then(|directory| read_in(agent, &directory));
-            match result {
-                Ok(native) => match block(&native.content) {
-                    Ok(managed) => {
-                        let own = without_block(&native.content, managed.as_ref());
-                        AgentState {
-                            agent_id: (*agent).into(),
-                            enabled: Some(managed.is_some()),
-                            needs_sync: managed
-                                .as_ref()
-                                .is_some_and(|block| block.text != file.content),
-                            own_line_count: own
-                                .lines()
-                                .filter(|line| !line.trim().is_empty())
-                                .count(),
-                            file: Some(native),
-                            issue: None,
-                        }
-                    }
-                    Err(err) => AgentState {
-                        agent_id: (*agent).into(),
-                        file: Some(native),
-                        enabled: None,
-                        needs_sync: false,
-                        own_line_count: 0,
-                        issue: Some(err.message.into()),
-                    },
-                },
-                Err(err) => AgentState {
-                    agent_id: (*agent).into(),
-                    file: None,
-                    enabled: None,
-                    needs_sync: false,
-                    own_line_count: 0,
-                    issue: Some(err.message.into()),
-                },
-            }
-        })
-        .collect();
-    Ok(Library { file, agents })
-}
-
-fn sync(
-    current: &InstructionFile,
-    guard: &FileGuard,
-    text: Option<&str>,
-    directory: &Path,
-) -> Result<(), InstructionError> {
-    let request = SaveRequest {
-        agent_id: current.agent_id.clone(),
-        content: String::new(),
-        expected_path: guard.path.clone(),
-        expected_revision: guard.revision.clone(),
-    };
-    check_revision(current, &request)?;
-    let managed = block(&current.content)?;
-    if let Some(text) = text {
-        validate_text(text)?;
-    }
-    let replacement = text
-        .map(|text| format!("\n{BEGIN}\n{text}\n{END}\n"))
-        .unwrap_or_default();
-    let content = if let Some(managed) = managed {
-        format!(
-            "{}{}{}",
-            &current.content[..managed.start],
-            replacement,
-            &current.content[managed.end..]
-        )
-    } else {
-        format!("{}{}", current.content, replacement)
-    };
-    if content == current.content {
-        return Ok(());
-    }
-    save_unlocked(SaveRequest { content, ..request }, directory)?;
-    Ok(())
-}
-
-struct Block<'a> {
-    start: usize,
-    end: usize,
-    text: &'a str,
-}
-
-fn block(content: &str) -> Result<Option<Block<'_>>, InstructionError> {
-    let opens = content.matches(BEGIN).count();
-    let closes = content.matches(END).count();
-    if opens == 0 && closes == 0 {
-        return Ok(None);
-    }
-    let invalid = || {
-        error("invalid_markers", "The Lithe shared instruction markers were changed. Repair the native file before syncing.")
-    };
-    if opens != 1 || closes != 1 {
-        return Err(invalid());
-    }
-    // Include our own leading/trailing newline in the range. Removing a block
-    // restores the exact original bytes, even when the user file had no newline.
-    let open = format!("\n{BEGIN}\n");
-    let close = format!("\n{END}\n");
-    let start = content.find(&open).ok_or_else(invalid)?;
-    let text_start = start + open.len();
-    let close_start = content[text_start..]
-        .find(&close)
-        .map(|index| text_start + index)
-        .ok_or_else(invalid)?;
-    Ok(Some(Block {
-        start,
-        end: close_start + close.len(),
-        text: &content[text_start..close_start],
-    }))
-}
-
-fn without_block(content: &str, managed: Option<&Block<'_>>) -> String {
-    managed
-        .map(|block| format!("{}{}", &content[..block.start], &content[block.end..]))
-        .unwrap_or_else(|| content.into())
-}
-
-fn validate_text(content: &str) -> Result<(), InstructionError> {
-    if content.len() > MAX_BYTES {
-        return Err(error(
-            "file_too_large",
-            "Global instructions must be no larger than 1 MiB.",
-        ));
-    }
-    if content.contains(BEGIN) || content.contains(END) {
-        return Err(error(
-            "invalid_markers",
-            "Shared instructions cannot contain Lithe synchronization markers.",
-        ));
-    }
-    Ok(())
-}
-
-#[cfg(test)]
-mod tests;
diff --git a/rust/lithe-agent-host/src/instructions/shared/tests.rs b/rust/lithe-agent-host/src/instructions/shared/tests.rs
deleted file mode 100644
index 4939fc71..00000000
--- a/rust/lithe-agent-host/src/instructions/shared/tests.rs
+++ /dev/null
@@ -1,228 +0,0 @@
-use super::*;
-
-struct Fixture {
-    path: PathBuf,
-    write_lock: Mutex<()>,
-}
-impl Fixture {
-    fn new() -> Self {
-        Self {
-            path: std::env::temp_dir().join(format!("lithe-shared-{}", uuid::Uuid::new_v4())),
-            write_lock: Mutex::new(()),
-        }
-    }
-    fn profile(&self, agent: &str) -> Result<PathBuf, InstructionError> {
-        Ok(self.path.join(agent))
-    }
-    fn read(&self) -> Library {
-        self.run(Action::Read {}).unwrap()
-    }
-    fn run(&self, action: Action) -> Result<Library, InstructionError> {
-        execute_in(
-            Request {
-                data_directory: self.path.join("library"),
-                action,
-            },
-            &|agent| self.profile(agent),
-            &|| false,
-            &self.write_lock,
-        )
-    }
-    fn save(&self, library: &Library, text: &str) -> Library {
-        self.run(Action::Save {
-            content: text.into(),
-            expected_revision: library.file.revision.clone(),
-            files: library
-                .agents
-                .iter()
-                .filter_map(|agent| agent.file.as_ref().map(guard))
-                .collect(),
-        })
-        .unwrap()
-    }
-    fn toggle(
-        &self,
-        library: &Library,
-        agent: &str,
-        enabled: bool,
-    ) -> Result<Library, InstructionError> {
-        self.run(Action::SetEnabled {
-            agent_id: agent.into(),
-            enabled,
-            expected_revision: library.file.revision.clone(),
-            file: guard(
-                library
-                    .agents
-                    .iter()
-                    .find(|row| row.agent_id == agent)
-                    .unwrap()
-                    .file
-                    .as_ref()
-                    .unwrap(),
-            ),
-        })
-    }
-}
-impl Drop for Fixture {
-    fn drop(&mut self) {
-        let _ = fs::remove_dir_all(&self.path);
-    }
-}
-fn guard(file: &InstructionFile) -> FileGuard {
-    FileGuard {
-        agent_id: file.agent_id.clone(),
-        path: file.path.clone(),
-        revision: file.revision.clone(),
-    }
-}
-fn enabled(library: &Library, agent: &str) -> bool {
-    library
-        .agents
-        .iter()
-        .find(|row| row.agent_id == agent)
-        .unwrap()
-        .enabled
-        == Some(true)
-}
-
-#[test]
-fn shared_sync_preserves_own_bytes_checks_revisions_and_reports_partial_failures() {
-    let fixture = Fixture::new();
-    let first = fixture.read();
-    assert!(
-        !fixture.path.exists(),
-        "opening settings must not create any files"
-    );
-    let locked = fixture.write_lock.try_lock().unwrap();
-    assert_eq!(
-        fixture
-            .run(Action::Save {
-                content: "not written".into(),
-                expected_revision: first.file.revision.clone(),
-                files: vec![]
-            })
-            .err()
-            .unwrap()
-            .reason,
-        "busy"
-    );
-    assert!(!fixture.path.exists());
-    drop(locked);
-    let codex = fixture.profile("codex-acp").unwrap();
-    let claude = fixture.profile("claude-acp").unwrap();
-    fs::create_dir_all(&codex).unwrap();
-    fs::create_dir_all(&claude).unwrap();
-    let own_codex = "# 私有规则\r\n无结尾换行";
-    fs::write(codex.join("AGENTS.md"), own_codex).unwrap();
-    fs::write(claude.join("CLAUDE.md"), "Claude only\n").unwrap();
-    let library = fixture.save(&first, "共享中文\nKeep identifiers.");
-    assert!(!enabled(&library, "codex-acp"));
-    let library = fixture.toggle(&library, "codex-acp", true).unwrap();
-    let library = fixture.toggle(&library, "claude-acp", true).unwrap();
-    assert!(enabled(&library, "codex-acp") && enabled(&library, "claude-acp"));
-    let library = fixture.save(&library, "第二版");
-    assert!(library
-        .agents
-        .iter()
-        .all(|row| !row.needs_sync && row.issue.is_none()));
-    assert!(fs::read_to_string(codex.join("AGENTS.md"))
-        .unwrap()
-        .starts_with(own_codex));
-    let stale = library;
-    fs::write(
-        codex.join("AGENTS.md"),
-        format!(
-            "外部修改{}",
-            fs::read_to_string(codex.join("AGENTS.md")).unwrap()
-        ),
-    )
-    .unwrap();
-    let library = fixture.save(&stale, "第三版");
-    let row = &library.agents[0];
-    assert!(row.needs_sync && row.issue.is_some());
-    assert!(
-        !library.agents[1].needs_sync,
-        "another Agent can complete despite one conflict"
-    );
-    assert_eq!(
-        fixture
-            .toggle(&stale, "codex-acp", false)
-            .err()
-            .unwrap()
-            .reason,
-        "file_changed"
-    );
-    let library = fixture.save(&library, "第三版");
-    assert!(library.agents.iter().all(|row| !row.needs_sync));
-    let library = fixture.toggle(&library, "codex-acp", false).unwrap();
-    assert!(!enabled(&library, "codex-acp") && enabled(&library, "claude-acp"));
-    assert_eq!(
-        fs::read_to_string(codex.join("AGENTS.md")).unwrap(),
-        format!("外部修改{own_codex}")
-    );
-    let _ = fixture.toggle(&library, "claude-acp", false).unwrap();
-    assert_eq!(
-        fs::read_to_string(claude.join("CLAUDE.md")).unwrap(),
-        "Claude only\n"
-    );
-    // Reopening uses disk snapshots; no in-memory preference can claim a stale switch.
-    let reopened = fixture.read();
-    assert!(reopened.agents.iter().all(|row| row.enabled == Some(false)));
-    assert_eq!(reopened.file.content, "第三版");
-    fs::write(codex.join("AGENTS.override.md"), "override text").unwrap();
-    let library = fixture.read();
-    let library = fixture.toggle(&library, "codex-acp", true).unwrap();
-    assert!(library.agents[0]
-        .file
-        .as_ref()
-        .unwrap()
-        .path
-        .ends_with("AGENTS.override.md"));
-    let _ = fixture.toggle(&library, "codex-acp", false).unwrap();
-    assert_eq!(
-        fs::read_to_string(codex.join("AGENTS.override.md")).unwrap(),
-        "override text"
-    );
-    // Malformed or duplicate markers are left untouched and the switch becomes unknown.
-    fs::write(claude.join("CLAUDE.md"), BEGIN).unwrap();
-    let library = fixture.read();
-    assert!(library.agents[1].enabled.is_none() && library.agents[1].issue.is_some());
-    assert_eq!(
-        fixture
-            .toggle(&library, "claude-acp", true)
-            .err()
-            .unwrap()
-            .reason,
-        "invalid_markers"
-    );
-    assert_eq!(fs::read_to_string(claude.join("CLAUDE.md")).unwrap(), BEGIN);
-}
-
-#[test]
-fn marked_ranges_roundtrip_and_reject_ambiguous_boundaries() {
-    for own in ["", "no newline", "ends in LF\n", "CRLF\r\n", "中文\n\n"] {
-        for shared in ["", "中文", "line\n", "line\r\n"] {
-            let combined = format!("{own}\n{BEGIN}\n{shared}\n{END}\nextra");
-            let managed = block(&combined).unwrap().unwrap();
-            assert_eq!(managed.text, shared);
-            assert_eq!(
-                without_block(&combined, Some(&managed)),
-                format!("{own}extra")
-            );
-        }
-    }
-    for malformed in [
-        BEGIN.to_string(),
-        END.to_string(),
-        format!("\n{BEGIN}\n{BEGIN}\nx\n{END}\n"),
-        format!("{BEGIN}\nx\n{END}"),
-    ] {
-        assert!(block(&malformed).is_err());
-    }
-    assert!(validate_text(BEGIN).is_err());
-    assert!(validate_text(&"x".repeat(MAX_BYTES + 1)).is_err());
-    let request: Request =
-        serde_json::from_value(serde_json::json!({"dataDirectory":"/fixture", "action":"read"}))
-            .unwrap();
-    assert!(matches!(request.action, Action::Read {}));
-}
diff --git a/rust/lithe-agent-host/src/instructions/tests.rs b/rust/lithe-agent-host/src/instructions/tests.rs
deleted file mode 100644
index dc8b00b5..00000000
--- a/rust/lithe-agent-host/src/instructions/tests.rs
+++ /dev/null
@@ -1,203 +0,0 @@
-use super::*;
-
-struct Directory(PathBuf);
-impl Directory {
-    fn new() -> Self {
-        Self(std::env::temp_dir().join(format!("lithe-instructions-{}", uuid::Uuid::new_v4())))
-    }
-    fn write(&self, name: &str, bytes: &[u8]) {
-        fs::create_dir_all(&self.0).unwrap();
-        fs::write(self.0.join(name), bytes).unwrap();
-    }
-}
-impl Drop for Directory {
-    fn drop(&mut self) {
-        let _ = fs::remove_dir_all(&self.0);
-    }
-}
-
-fn request(file: &InstructionFile, content: &str) -> SaveRequest {
-    SaveRequest {
-        agent_id: file.agent_id.clone(),
-        content: content.into(),
-        expected_path: file.path.clone(),
-        expected_revision: file.revision.clone(),
-    }
-}
-
-#[test]
-fn native_sources_follow_override_and_agent_boundaries_without_creating_files() {
-    let directory = Directory::new();
-    let empty = read_in("codex-acp", &directory.0).unwrap();
-    assert!(!empty.exists);
-    assert!(!directory.0.exists(), "opening settings is read only");
-    directory.write("AGENTS.md", "base 中文\n".as_bytes());
-    directory.write("CLAUDE.md", b"claude");
-    directory.write("AGENTS.override.md", b" \n");
-    assert_eq!(
-        read_in("codex-acp", &directory.0).unwrap().content,
-        "base 中文\n"
-    );
-    directory.write("AGENTS.override.md", b"override");
-    assert_eq!(
-        read_in("codex-acp", &directory.0).unwrap().content,
-        "override"
-    );
-    assert_eq!(
-        read_in("claude-acp", &directory.0).unwrap().content,
-        "claude"
-    );
-    assert_eq!(
-        read_in("custom", &directory.0).unwrap_err().reason,
-        "unsupported_agent"
-    );
-}
-
-#[test]
-fn save_roundtrip_guards_external_edits_and_native_precedence() {
-    // All saves in this case share the native save lock; no environment mutation.
-    let directory = Directory::new();
-    let missing = read_in("codex-acp", &directory.0).unwrap();
-    let saved = save_in(request(&missing, "中文\r\nexact bytes\n"), &directory.0).unwrap();
-    assert_eq!(saved.content, "中文\r\nexact bytes\n");
-    assert!(saved.exists);
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::PermissionsExt;
-        assert_eq!(
-            fs::metadata(&saved.path).unwrap().permissions().mode() & 0o777,
-            0o600
-        );
-        assert_eq!(
-            fs::metadata(&directory.0).unwrap().permissions().mode() & 0o777,
-            0o700
-        );
-        fs::set_permissions(&saved.path, fs::Permissions::from_mode(0o640)).unwrap();
-    }
-    let updated = save_in(request(&saved, "base"), &directory.0).unwrap();
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::PermissionsExt;
-        assert_eq!(
-            fs::metadata(&updated.path).unwrap().permissions().mode() & 0o777,
-            0o640
-        );
-    }
-    let original_permissions = fs::metadata(&updated.path).unwrap().permissions();
-    let mut readonly = original_permissions.clone();
-    readonly.set_readonly(true);
-    fs::set_permissions(&updated.path, readonly).unwrap();
-    assert_eq!(
-        save_in(request(&updated, "read only overwrite"), &directory.0)
-            .unwrap_err()
-            .reason,
-        "file_access"
-    );
-    assert_eq!(fs::read_to_string(&updated.path).unwrap(), "base");
-    fs::set_permissions(&updated.path, original_permissions).unwrap();
-    directory.write("AGENTS.md", b"external edit");
-    assert_eq!(
-        save_in(request(&updated, "overwrite"), &directory.0)
-            .unwrap_err()
-            .reason,
-        "file_changed"
-    );
-    assert_eq!(fs::read_to_string(&updated.path).unwrap(), "external edit");
-    directory.write("AGENTS.override.md", b"override");
-    assert_eq!(
-        save_in(request(&updated, "overwrite"), &directory.0)
-            .unwrap_err()
-            .reason,
-        "file_changed"
-    );
-    let active = read_in("codex-acp", &directory.0).unwrap();
-    let effective = save_in(request(&active, ""), &directory.0).unwrap();
-    assert!(effective.path.ends_with("AGENTS.md"));
-    assert_eq!(effective.content, "external edit");
-    let cleared = save_in(request(&effective, ""), &directory.0).unwrap();
-    assert_eq!(cleared.content, "");
-    let claude = read_in("claude-acp", &directory.0).unwrap();
-    let claude = save_in(request(&claude, "Claude only"), &directory.0).unwrap();
-    assert_eq!(claude.content, "Claude only");
-    assert_eq!(read_in("codex-acp", &directory.0).unwrap().content, "");
-    let mut wrong_path = request(&claude, "bad");
-    wrong_path.expected_path = directory.0.join("arbitrary.md");
-    assert_eq!(
-        save_in(wrong_path, &directory.0).unwrap_err().reason,
-        "file_changed"
-    );
-    let oversized = "x".repeat(MAX_BYTES + 1);
-    assert_eq!(
-        save_in(request(&claude, &oversized), &directory.0)
-            .unwrap_err()
-            .reason,
-        "file_too_large"
-    );
-    assert!(!fs::read_dir(&directory.0).unwrap().any(|entry| entry
-        .unwrap()
-        .file_name()
-        .to_string_lossy()
-        .starts_with(".lithe-")));
-}
-
-#[test]
-fn profile_resolution_respects_explicit_configuration_and_rejects_relative_paths() {
-    let directory = Directory::new();
-    assert_eq!(
-        resolve_profile(Some(directory.0.clone()), None).unwrap(),
-        directory.0
-    );
-    assert_eq!(
-        resolve_profile(None, Some(directory.0.clone())).unwrap(),
-        directory.0
-    );
-    assert_eq!(
-        resolve_profile(Some(PathBuf::from("relative")), Some(directory.0.clone()))
-            .unwrap_err()
-            .reason,
-        "profile_relative"
-    );
-    assert_eq!(
-        resolve_profile(None, None).unwrap_err().reason,
-        "profile_missing"
-    );
-}
-
-#[test]
-fn rejects_non_text_and_non_regular_files_and_distinguishes_absence() {
-    let directory = Directory::new();
-    let absent = read_in("claude-acp", &directory.0).unwrap();
-    directory.write("CLAUDE.md", b"");
-    assert_ne!(
-        read_in("claude-acp", &directory.0).unwrap().revision,
-        absent.revision
-    );
-    directory.write("CLAUDE.md", &[0xff]);
-    assert_eq!(
-        read_in("claude-acp", &directory.0).unwrap_err().reason,
-        "invalid_utf8"
-    );
-    directory.write("CLAUDE.md", &vec![b'x'; MAX_BYTES + 1]);
-    assert_eq!(
-        read_in("claude-acp", &directory.0).unwrap_err().reason,
-        "file_too_large"
-    );
-    fs::remove_file(directory.0.join("CLAUDE.md")).unwrap();
-    fs::create_dir(directory.0.join("CLAUDE.md")).unwrap();
-    assert_eq!(
-        read_in("claude-acp", &directory.0).unwrap_err().reason,
-        "unsafe_file"
-    );
-    #[cfg(unix)]
-    {
-        fs::remove_dir(directory.0.join("CLAUDE.md")).unwrap();
-        directory.write("target.md", b"keep");
-        std::os::unix::fs::symlink(directory.0.join("target.md"), directory.0.join("CLAUDE.md"))
-            .unwrap();
-        assert_eq!(
-            read_in("claude-acp", &directory.0).unwrap_err().reason,
-            "unsafe_file"
-        );
-        assert_eq!(fs::read(directory.0.join("target.md")).unwrap(), b"keep");
-    }
-}
diff --git a/rust/lithe-agent-host/src/lib.rs b/rust/lithe-agent-host/src/lib.rs
deleted file mode 100644
index ba311124..00000000
--- a/rust/lithe-agent-host/src/lib.rs
+++ /dev/null
@@ -1,2379 +0,0 @@
-//! Shared ACP client connection and bounded agent subprocess ownership.
-//!
-//! One [`AgentHandle`] owns one agent process and one ACP connection for a
-//! workspace. A connection carries many conversation sessions; the agent owns
-//! their history (`session/list`, `session/load`). Product UI, settings, and
-//! credential storage stay with the platform applications.
-//! See `.agents/notes/implemented/architecture/2026-09-25-shared-acp-agent-conversation.md`.
-
-pub mod failure_log;
-
-pub mod attachment_retention;
-pub mod catalog;
-mod claude_desktop;
-mod claude_earlier_history;
-mod claude_subscription;
-pub mod cli_update;
-mod codex_context;
-mod codex_history;
-mod codex_retry;
-pub mod edit_review;
-pub mod environment;
-pub mod hooks;
-pub mod install;
-pub mod instructions;
-pub mod mcp_probe;
-mod model_call_statistics;
-mod model_calls;
-mod model_proxy;
-pub mod next_turn_config;
-mod prompt;
-mod prompt_retry;
-mod session_defaults;
-mod session_restore;
-mod session_routing;
-pub mod skills;
-mod steering;
-mod subagents;
-mod subscription;
-mod workspace_context;
-
-pub use catalog::{ModelDelivery, ProviderProtocol};
-pub use model_call_statistics::ModelCallStatistics;
-pub use model_calls::{ContextComposition, ModelApi, ModelCall, ModelCallUsage};
-pub use prompt::PromptFile;
-
-use std::collections::{HashMap, VecDeque};
-use std::ffi::OsString;
-use std::path::{Path, PathBuf};
-use std::process::Stdio;
-use std::sync::atomic::{AtomicBool, AtomicU32, AtomicU64, Ordering};
-use std::sync::{mpsc, Arc, Mutex};
-use std::time::Duration;
-
-use agent_client_protocol::schema::v1::{
-    AuthCapabilities, AuthenticateRequest, CancelNotification, ClientCapabilities,
-    ClientSessionCapabilities, ContentBlock, InitializeRequest, ListSessionsRequest,
-    LoadSessionRequest, NoticeCapabilities, PromptRequest, RequestPermissionOutcome,
-    RequestPermissionRequest, RequestPermissionResponse, SelectedPermissionOutcome,
-    SessionConfigOption, SetSessionConfigOptionRequest,
-};
-use agent_client_protocol::schema::ProtocolVersion;
-use agent_client_protocol::{Agent, ByteStreams, Client, ConnectionTo};
-use serde::{Deserialize, Serialize};
-use tokio::io::AsyncReadExt;
-use tokio::sync::{mpsc as async_mpsc, oneshot};
-use tokio::task::JoinSet;
-use tokio_util::compat::{TokioAsyncReadCompatExt, TokioAsyncWriteCompatExt};
-
-const HANDSHAKE_TIMEOUT: Duration = Duration::from_secs(20);
-const SESSION_REQUEST_TIMEOUT: Duration = Duration::from_secs(30);
-const LOAD_SESSION_TIMEOUT: Duration = Duration::from_secs(60);
-const STOP_TIMEOUT: Duration = Duration::from_secs(3);
-const CANCEL_TIMEOUT: Duration = Duration::from_secs(10);
-/// Longest wait for observed model calls of a turn to report before the turn
-/// finishes, so per-turn statistics see them. Never affects unobserved turns.
-const MODEL_CALL_SETTLE_TIMEOUT: Duration = Duration::from_secs(2);
-/// Upper bound on `session/list` pages so a misbehaving cursor cannot loop forever.
-const MAX_SESSION_LIST_PAGES: usize = 50;
-/// Windows flag that runs a child with a console it cannot display. The
-/// desktop shell is a GUI process without a console, so every console-subsystem
-/// child this crate starts (adapters, version probes, installers, quota and MCP
-/// probes) would otherwise open a visible console window.
-#[cfg(windows)]
-const CREATE_NO_WINDOW: u32 = 0x0800_0000;
-/// Bytes of agent stderr kept for failure reports; older output is discarded.
-const STDERR_TAIL_BYTES: usize = 16 * 1024;
-const STDERR_TAIL_LINES: usize = 20;
-/// Auth method id and `_meta` key of the ACP custom model gateway extension.
-/// Responses API-key mode uses this method and never falls back to account login.
-const GATEWAY_AUTH_METHOD: &str = "gateway";
-/// Environment variable naming the platform's process scope of one connection.
-/// Every descendant of the agent inherits it, which is how a host recognizes the
-/// agent's tasks even after they left its process group.
-pub const AGENT_SCOPE_ENVIRONMENT: &str = "LITHE_AGENT_SCOPE";
-
-/// Context sizing the user chose for one Agent. `None` keeps the Agent's own default.
-///
-/// Codex takes both numbers as native configuration. Claude Code has one knob,
-/// its auto-compact window, so the threshold (or else the context length) is
-/// delivered as `CLAUDE_CODE_AUTO_COMPACT_WINDOW`; its model size stays model-defined.
-#[derive(Clone, Copy, Debug, Default, Deserialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct ContextLimits {
-    /// Tokens of context the Agent may use.
-    #[serde(default)]
-    pub window_tokens: Option<u64>,
-    /// Tokens at which the Agent summarizes its context automatically.
-    #[serde(default)]
-    pub auto_compact_tokens: Option<u64>,
-}
-
-impl ContextLimits {
-    /// The threshold never exceeds the window: a threshold the context cannot
-    /// reach would never compact. The settings UI rejects it too, but other
-    /// callers reach this boundary directly.
-    fn auto_compact_within_window(self) -> Option<u64> {
-        let threshold = self.auto_compact_tokens.filter(|tokens| *tokens > 0)?;
-        Some(match self.window_tokens.filter(|tokens| *tokens > 0) {
-            Some(window) => threshold.min(window),
-            None => threshold,
-        })
-    }
-
-    /// The single window Claude Code is told about, if any. A threshold wins
-    /// because it is the point where Claude Code actually compacts.
-    fn claude_auto_compact_window(self) -> Option<u64> {
-        self.auto_compact_within_window()
-            .or(self.window_tokens)
-            .filter(|tokens| *tokens > 0)
-    }
-
-    fn codex_config(self, config: &mut serde_json::Value) {
-        if let Some(tokens) = self.window_tokens.filter(|tokens| *tokens > 0) {
-            config["model_context_window"] = serde_json::json!(tokens);
-        }
-        if let Some(tokens) = self.auto_compact_within_window() {
-            config["model_auto_compact_token_limit"] = serde_json::json!(tokens);
-        }
-    }
-}
-
-/// Launch configuration supplied by the owning desktop product.
-///
-/// A catalog agent (`agentId`) is started from its Lithe-managed install and
-/// receives the key the way its adapter requires. Without `agentId`, `command`
-/// runs a user-provided agent that must support gateway sign-in.
-#[derive(Clone, Debug, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct AgentLaunch {
-    #[serde(default)]
-    pub agent_id: Option<String>,
-    #[serde(default)]
-    pub command: Option<String>,
-    #[serde(default)]
-    pub args: Vec<String>,
-    /// Absolute workspace root; sessions are created and listed for this directory.
-    pub cwd: PathBuf,
-    /// Directory holding Lithe-managed adapter installs; required with `agentId`.
-    #[serde(default)]
-    pub data_directory: Option<PathBuf>,
-    #[serde(default)]
-    pub authentication: AgentAuthentication,
-    pub provider: Option<ProviderCredentials>,
-    /// Observe API-key or Codex subscription inference through the loopback
-    /// proxy and emit model-call measurements without retaining request bodies.
-    #[serde(default)]
-    pub observe_model_calls: bool,
-    /// Opt in only when the consuming product can present native child sessions.
-    /// Omitted/false preserves legacy adapter output for other clients.
-    #[serde(default)]
-    pub observe_subagents: bool,
-    /// Exported as [`AGENT_SCOPE_ENVIRONMENT`] to the agent process tree.
-    #[serde(default)]
-    pub process_scope: Option<String>,
-    /// Claude Code configuration directory of one account, exported as
-    /// `CLAUDE_CONFIG_DIR`. Only the Claude subscription mode accepts it; the
-    /// directory holds the official CLI's own login and Lithe never reads it.
-    #[serde(default)]
-    pub claude_config_dir: Option<PathBuf>,
-    /// Codex home directory of one account, exported as `CODEX_HOME`, including
-    /// to the quota probe. Only the Codex subscription mode accepts it.
-    #[serde(default)]
-    pub codex_home: Option<PathBuf>,
-    /// Context length and auto-compact threshold chosen for this Agent.
-    #[serde(default)]
-    pub context_limits: ContextLimits,
-}
-
-/// Subscription access is explicit: each mode is limited to its own installed adapter.
-#[derive(Clone, Copy, Debug, Default, Deserialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub enum AgentAuthentication {
-    #[default]
-    ApiKey,
-    CodexSubscription,
-    /// The user's signed-in Claude Code CLI pays; see [`claude_subscription`].
-    ClaudeSubscription,
-}
-
-/// User-supplied AI provider endpoint and API key.
-#[derive(Clone, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ProviderCredentials {
-    pub protocol: ProviderProtocol,
-    /// Endpoint as configured, with or without the protocol's path suffix.
-    pub base_url: String,
-    pub api_key: String,
-    #[serde(default)]
-    pub name: Option<String>,
-    /// Model to request; empty or absent keeps the agent's default.
-    #[serde(default)]
-    pub model: Option<String>,
-    /// Allow a plain `http` endpoint, e.g. a local gateway the user opted into.
-    #[serde(default)]
-    pub allow_insecure_http: bool,
-}
-
-impl ProviderCredentials {
-    /// Responses base URL accepted by gateway sign-in, e.g. `https://host/v1`.
-    fn responses_base_url(&self) -> Result<String, String> {
-        let trimmed = self.base_url.trim().trim_end_matches('/');
-        self.checked(trimmed.strip_suffix("/responses").unwrap_or(trimmed))
-    }
-
-    /// Anthropic base URL without `/v1` or `/v1/messages`, as the SDK expects.
-    fn anthropic_base_url(&self) -> Result<String, String> {
-        let trimmed = self.base_url.trim().trim_end_matches('/');
-        let base = trimmed.strip_suffix("/messages").unwrap_or(trimmed);
-        self.checked(base.strip_suffix("/v1").unwrap_or(base))
-    }
-
-    fn checked(&self, base: &str) -> Result<String, String> {
-        let secure = base.starts_with("https://");
-        let insecure = base.starts_with("http://");
-        if !(secure || insecure && self.allow_insecure_http) {
-            return Err("The API endpoint must use https".into());
-        }
-        let host = base
-            .split_once("://")
-            .map(|(_, rest)| rest)
-            .unwrap_or_default();
-        if host.is_empty() || host.starts_with('/') || base.contains(['?', '#', ' ']) {
-            return Err("The API endpoint is not a valid URL".into());
-        }
-        Ok(base.to_owned())
-    }
-}
-
-impl std::fmt::Debug for ProviderCredentials {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        f.debug_struct("ProviderCredentials")
-            .field("protocol", &self.protocol)
-            .field("base_url", &self.base_url)
-            .field("api_key", &"<redacted>")
-            .field("name", &self.name)
-            .field("model", &self.model)
-            .field("allow_insecure_http", &self.allow_insecure_http)
-            .finish()
-    }
-}
-
-/// API-key routing sent over ACP stdio, using each adapter's supported interface.
-#[derive(Clone)]
-struct GatewaySignIn {
-    protocol: ProviderProtocol,
-    base_url: String,
-    /// Authentication headers in the dialect of the provider's protocol.
-    headers: Vec<(String, String)>,
-    provider_name: Option<String>,
-    model: Option<String>,
-    /// Bounded native Codex recovery, with a pre-work HTTP 429 fallback.
-    native_recovery: bool,
-}
-
-/// A validated launch: what to run and how the key reaches the agent.
-struct ResolvedLaunch {
-    command: PathBuf,
-    args: Vec<String>,
-    cwd: PathBuf,
-    /// Non-secret CLI paths and model defaults for the native adapters.
-    env: Vec<(String, String)>,
-    gateway: Option<GatewaySignIn>,
-    /// Key to redact from diagnostics.
-    secret: String,
-    /// The already detected Codex executable; never a separately downloaded runtime.
-    subscription_cli: Option<PathBuf>,
-    /// The signed-in Claude Code CLI pays: no route, key or token is injected.
-    claude_subscription: bool,
-    /// Account directory the Codex quota probe must share with the adapter.
-    codex_home: Option<PathBuf>,
-    /// Claude transcript root of the adapter's account, for history that
-    /// compaction hides from `session/load`; None for every other agent.
-    claude_projects: Option<PathBuf>,
-}
-
-#[cfg(test)]
-fn resolve(launch: AgentLaunch) -> Result<ResolvedLaunch, String> {
-    resolve_with_cancel(launch, &|| false)
-}
-
-/// Resolve a launch while allowing runtime and CLI detection to observe stop.
-fn resolve_with_cancel(
-    launch: AgentLaunch,
-    cancel: &dyn Fn() -> bool,
-) -> Result<ResolvedLaunch, String> {
-    let resolved = resolve_with(launch, &|command| environment::detect_tool(command, cancel));
-    if cancel() {
-        return Err("Agent launch was cancelled".into());
-    }
-    resolved
-}
-
-/// [`resolve`] with an injectable lookup for the user's agent CLI.
-fn resolve_with(
-    launch: AgentLaunch,
-    find_cli: &dyn Fn(&str) -> Option<environment::DetectedTool>,
-) -> Result<ResolvedLaunch, String> {
-    match launch.authentication {
-        AgentAuthentication::CodexSubscription => return subscription::resolve(launch, find_cli),
-        AgentAuthentication::ClaudeSubscription => {
-            return claude_subscription::resolve(launch, find_cli)
-        }
-        AgentAuthentication::ApiKey => {}
-    }
-    let provider = launch.provider.ok_or("An API provider is required")?;
-    if provider.api_key.trim().is_empty() {
-        return Err("An API key is required".into());
-    }
-    if !launch.cwd.is_absolute() {
-        return Err("The workspace path must be absolute".into());
-    }
-    // Credentials travel over ACP stdio. Claude uses its public session options
-    // because its gateway mode adds a conflicting placeholder Bearer token.
-    let native_recovery = launch.agent_id.as_deref() == Some("codex-acp");
-    let gateway = |provider: &ProviderCredentials| -> Result<GatewaySignIn, String> {
-        let (base_url, header) = match provider.protocol {
-            ProviderProtocol::AnthropicMessages => (
-                provider.anthropic_base_url()?,
-                ("x-api-key".to_owned(), provider.api_key.clone()),
-            ),
-            ProviderProtocol::Responses | ProviderProtocol::ChatCompletions => (
-                provider.responses_base_url()?,
-                (
-                    "Authorization".to_owned(),
-                    format!("Bearer {}", provider.api_key),
-                ),
-            ),
-        };
-        Ok(GatewaySignIn {
-            protocol: provider.protocol,
-            base_url,
-            headers: vec![header],
-            provider_name: provider.name.clone(),
-            model: provider.model.clone(),
-            native_recovery,
-        })
-    };
-    let Some(agent_id) = launch.agent_id else {
-        let command = launch.command.unwrap_or_default();
-        if command.trim().is_empty() {
-            return Err("Set the ACP Agent executable before starting a conversation".into());
-        }
-        if provider.protocol != ProviderProtocol::Responses {
-            return Err("A custom Agent needs a provider that uses the Responses API".into());
-        }
-        return Ok(ResolvedLaunch {
-            command: PathBuf::from(command),
-            args: launch.args,
-            cwd: launch.cwd,
-            env: Vec::new(),
-            gateway: Some(gateway(&provider)?),
-            secret: provider.api_key,
-            subscription_cli: None,
-            claude_subscription: false,
-            codex_home: None,
-            claude_projects: None,
-        });
-    };
-    let agent = catalog::find(&agent_id).ok_or_else(|| format!("Unknown agent `{agent_id}`"))?;
-    if provider.protocol != agent.protocol {
-        return Err(format!(
-            "{} needs an AI provider that uses the {} protocol",
-            agent.name,
-            match agent.protocol {
-                ProviderProtocol::Responses => "Responses API",
-                ProviderProtocol::ChatCompletions => "Chat Completions",
-                ProviderProtocol::AnthropicMessages => "Anthropic Messages",
-            }
-        ));
-    }
-    let data_directory = launch
-        .data_directory
-        .ok_or("The Agent install directory is not configured")?;
-    if install::installed_version(&data_directory, agent).is_none() {
-        return Err(format!(
-            "{} is not installed. Install it in Settings › Agents.",
-            agent.name
-        ));
-    }
-    let gateway = Some(gateway(&provider)?);
-    let mut env = Vec::new();
-    if let Some(cli) = &agent.cli {
-        let detected = find_cli(cli.command);
-        if let Some(issue) = install::cli_issue(cli, detected.as_ref()) {
-            return Err(issue);
-        }
-        if let Some(entry) = detected.as_ref().and_then(|tool| cli_path_env(cli, tool)) {
-            env.push(entry);
-        }
-    }
-    let model = provider
-        .model
-        .as_deref()
-        .map(str::trim)
-        .filter(|model| !model.is_empty());
-    match agent.model_delivery {
-        ModelDelivery::CodexConfig => env.push((
-            "CODEX_CONFIG".to_owned(),
-            codex_session_config(model, launch.context_limits).to_string(),
-        )),
-        // A process-wide Claude pin also overrides every restored session.
-        // New-session defaults instead travel through session_routing.
-        ModelDelivery::ClaudeSessionOptions => {}
-    }
-    if agent.id == "claude-acp" {
-        env.extend(claude_context_env(launch.context_limits));
-    }
-    Ok(ResolvedLaunch {
-        command: install::installed_command(&data_directory, agent),
-        args: launch.args,
-        cwd: launch.cwd,
-        env,
-        gateway,
-        secret: provider.api_key,
-        subscription_cli: None,
-        claude_subscription: false,
-        codex_home: None,
-        claude_projects: (agent.id == "claude-acp")
-            .then(|| claude_earlier_history::projects_directory(None))
-            .flatten(),
-    })
-}
-
-/// Environment entry that points an adapter at the user's CLI.
-///
-/// On Windows, npm installs command shims as `.cmd` files. Adapters that pass
-/// `path_env` straight to `child_process.spawn` cannot execute them; those
-/// adapters use their bundled native launcher instead.
-fn cli_path_env(
-    cli: &catalog::AgentCli,
-    tool: &environment::DetectedTool,
-) -> Option<(String, String)> {
-    let script_shim = cfg!(windows)
-        && tool.path.extension().is_some_and(|extension| {
-            extension.eq_ignore_ascii_case("cmd") || extension.eq_ignore_ascii_case("bat")
-        });
-    (!script_shim || cli.accepts_windows_shim).then(|| {
-        (
-            cli.path_env.to_owned(),
-            tool.path.to_string_lossy().into_owned(),
-        )
-    })
-}
-
-/// Enable Codex's native checklist for Lithe-owned conversations. Codex defaults
-/// it off; the adapter forwards its plan events only when the tool is available.
-/// This process-local override neither changes collaboration mode nor writes the
-/// user's CLI settings. Subscription and API launches must use the same default.
-/// Claude Code's own switch for how full the context gets before it summarizes.
-const CLAUDE_AUTO_COMPACT_WINDOW: &str = "CLAUDE_CODE_AUTO_COMPACT_WINDOW";
-
-/// Environment entry that applies the user's context sizing to Claude Code.
-fn claude_context_env(limits: ContextLimits) -> Option<(String, String)> {
-    limits
-        .claude_auto_compact_window()
-        .map(|tokens| (CLAUDE_AUTO_COMPACT_WINDOW.to_owned(), tokens.to_string()))
-}
-
-fn codex_session_config(model: Option<&str>, limits: ContextLimits) -> serde_json::Value {
-    let mut config = serde_json::json!({ "tools": { "update_plan": { "enabled": true } } });
-    if let Some(model) = model {
-        config["model"] = serde_json::json!(model);
-    }
-    limits.codex_config(&mut config);
-    config
-}
-
-/// Commands accepted by an open connection, as UTF-8 JSON from the platform.
-///
-/// `token` values are caller-chosen and echoed on the matching result event so
-/// the UI can correlate concurrent requests.
-#[derive(Debug, Deserialize)]
-#[serde(
-    tag = "kind",
-    rename_all = "camelCase",
-    rename_all_fields = "camelCase"
-)]
-pub enum AgentCommand {
-    /// Explicit user action; this may open the upstream browser login.
-    Authenticate,
-    /// Read-only snapshot, only supported on an authenticated subscription connection.
-    RefreshQuota,
-    NewSession {
-        token: String,
-    },
-    LoadSession {
-        token: String,
-        session_id: String,
-    },
-    ListSessions {
-        token: String,
-    },
-    /// Read-only listing of the workspace's archived Codex conversations.
-    ListArchivedSessions {
-        token: String,
-    },
-    /// Move an archived Codex conversation back into its active history. Sent
-    /// only after the user confirmed; listing never changes upstream state.
-    UnarchiveSession {
-        token: String,
-        session_id: String,
-    },
-    Prompt {
-        session_id: String,
-        text: String,
-        #[serde(default)]
-        files: Vec<PromptFile>,
-    },
-    /// Supplement the current logical turn. Results never end that turn.
-    Steer {
-        token: String,
-        session_id: String,
-        text: String,
-        #[serde(default)]
-        files: Vec<PromptFile>,
-    },
-    Cancel {
-        session_id: String,
-    },
-    SetConfigOption {
-        token: String,
-        session_id: String,
-        config_id: String,
-        value: String,
-    },
-    /// Applies the choices a user made while a turn was running, after it
-    /// ended, as one ordered and confirmed sequence. See [`next_turn_config`].
-    ApplyNextTurnConfiguration {
-        token: String,
-        session_id: String,
-        /// The product's latest confirmed catalog of the session.
-        catalog: Vec<next_turn_config::CatalogOption>,
-        choices: Vec<next_turn_config::ConfigChoice>,
-    },
-    Permission {
-        request_id: String,
-        option_id: Option<String>,
-    },
-    /// Processes of the agent tree the user chose to keep running.
-    ///
-    /// Once any process is preserved, stopping the connection ends only the
-    /// agent process itself: the host has already ended the descendants it
-    /// was not asked to keep, and a tree or group kill would also hit the
-    /// preserved ones. Takes effect immediately on the calling thread.
-    PreserveProcesses {
-        process_ids: Vec<u32>,
-    },
-}
-
-/// One entry of the agent-owned conversation history for the workspace.
-#[derive(Clone, Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub struct AgentSessionSummary {
-    pub session_id: String,
-    pub title: Option<String>,
-    /// ISO 8601 history timestamp, if known. Codex uses conversation activity,
-    /// never the metadata update caused by merely resuming a session.
-    pub updated_at: Option<String>,
-    /// Opaque upstream provider identity, not the currently selected billing route.
-    /// Missing metadata stays unknown; older consumers can ignore this field.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub model_provider: Option<String>,
-}
-
-/// Events emitted from the connection worker thread.
-///
-/// Field names are fixed by `rust/fixtures/agent/acp-events-v1.json`.
-#[derive(Debug, Serialize)]
-#[serde(
-    tag = "kind",
-    rename_all = "camelCase",
-    rename_all_fields = "camelCase"
-)]
-pub enum AgentEvent {
-    /// No local ChatGPT login is available. Opening a panel never starts browser login.
-    AuthenticationRequired,
-    Authenticating,
-    /// Whitelisted upstream account identity; never contains credentials.
-    Account {
-        account: subscription::Account,
-    },
-    Quota {
-        snapshot: subscription::QuotaSnapshot,
-    },
-    QuotaFailed {
-        code: String,
-    },
-    /// Initialization and the selected authentication succeeded.
-    Ready {
-        agent_name: Option<String>,
-        agent_version: Option<String>,
-        can_load_sessions: bool,
-        can_list_sessions: bool,
-        /// Archived history is listed through the Agent's own CLI, not ACP.
-        can_list_archived_sessions: bool,
-        can_steer: bool,
-    },
-    /// Request-scoped delivery result, separate from prompt completion.
-    SteeringResult {
-        token: String,
-        session_id: String,
-        outcome: String,
-        #[serde(skip_serializing_if = "Option::is_none")]
-        message: Option<String>,
-    },
-    SessionCreated {
-        token: String,
-        session_id: String,
-        #[serde(skip_serializing_if = "Option::is_none")]
-        config_options: Option<Vec<SessionConfigOption>>,
-    },
-    /// `session/load` returned. History replay arrives as `update` events and
-    /// may continue after this event.
-    SessionLoaded {
-        token: String,
-        session_id: String,
-        #[serde(skip_serializing_if = "Option::is_none")]
-        config_options: Option<Vec<SessionConfigOption>>,
-    },
-    SessionConfigured {
-        token: String,
-        session_id: String,
-        config_options: Vec<SessionConfigOption>,
-    },
-    /// Result of `applyNextTurnConfiguration`. `config_options` is the latest
-    /// catalog the Agent returned, present once any request succeeded, so the
-    /// product shows confirmed settings even when a later choice failed.
-    NextTurnConfigured {
-        token: String,
-        session_id: String,
-        #[serde(skip_serializing_if = "Option::is_none")]
-        config_options: Option<Vec<SessionConfigOption>>,
-        /// Absent when every choice was applied.
-        #[serde(skip_serializing_if = "Option::is_none")]
-        failure: Option<next_turn_config::ConfigFailure>,
-        /// Upstream diagnostics of a failed request; never localized.
-        #[serde(skip_serializing_if = "Option::is_none")]
-        message: Option<String>,
-    },
-    TurnCancelling {
-        session_id: String,
-    },
-    /// Advisory silence notice only; the prompt remains busy and is never replayed.
-    TurnActivity {
-        session_id: String,
-        quiet: bool,
-    },
-    /// Newly received nonterminal page; only `Sessions` replaces the full snapshot.
-    SessionsPage {
-        token: String,
-        sessions: Vec<AgentSessionSummary>,
-    },
-    Sessions {
-        token: String,
-        sessions: Vec<AgentSessionSummary>,
-    },
-    /// `complete` is false when the page bound stopped the listing.
-    ArchivedSessions {
-        token: String,
-        sessions: Vec<AgentSessionSummary>,
-        complete: bool,
-    },
-    SessionUnarchived {
-        token: String,
-        session_id: String,
-    },
-    /// A raw ACP `SessionUpdate`, including replayed history.
-    Update {
-        session_id: String,
-        update: serde_json::Value,
-    },
-    Permission {
-        session_id: String,
-        request_id: String,
-        request: serde_json::Value,
-    },
-    /// The same busy turn is reconnecting, without implying another Host prompt.
-    TurnRetrying {
-        session_id: String,
-        turn_id: String,
-        attempt: u32,
-        /// Only pre-work recovery has a Host attempt limit. Native recovery
-        /// after work owns its budget and omits this field.
-        #[serde(skip_serializing_if = "Option::is_none")]
-        max_attempts: Option<u32>,
-    },
-    /// One provider request observed by the opt-in loopback proxy. `sessionId`
-    /// is absent when no prompt, or more than one, was running at its start.
-    ModelCall {
-        #[serde(skip_serializing_if = "Option::is_none")]
-        session_id: Option<String>,
-        /// The causing turn already finished: the stream outlived the settle
-        /// bound. Consumers count it for the session only, never a later turn.
-        #[serde(skip_serializing_if = "std::ops::Not::not")]
-        after_turn_finished: bool,
-        call: model_calls::ModelCall,
-        /// This call's contribution to turn and session statistics. Products
-        /// merge contributions; they never reinterpret `call` for accounting.
-        statistics: ModelCallStatistics,
-    },
-    /// The agent acknowledged the prompt's completion, including cancellation.
-    TurnFinished {
-        session_id: String,
-        stop_reason: String,
-        /// Optional counters reported by the agent, whose accounting scope is provider-owned.
-        #[serde(skip_serializing_if = "Option::is_none")]
-        usage: Option<agent_client_protocol::schema::v1::Usage>,
-    },
-    /// A command failed without ending the connection.
-    RequestFailed {
-        token: Option<String>,
-        session_id: Option<String>,
-        message: String,
-    },
-    /// The connection ended. `message` is absent only after a requested stop.
-    Stopped {
-        message: Option<String>,
-    },
-}
-
-type Emit = Arc<dyn Fn(AgentEvent) + Send + Sync + 'static>;
-
-struct PendingPermission {
-    /// Root turn used by cancellation and quiet-period accounting.
-    session_id: String,
-    /// Original ACP requester, retained to cancel only an ended child subtree.
-    source_session_id: String,
-    reply: oneshot::Sender<Option<String>>,
-}
-
-/// Permission requests awaiting a user decision, keyed by Lithe request id.
-type PendingPermissions = Arc<Mutex<HashMap<String, PendingPermission>>>;
-
-/// Running turn generation per session. A session is absent while idle, so a
-/// response whose generation no longer matches belongs to a cancelled turn.
-type RunningTurns = Arc<Mutex<HashMap<String, RunningTurn>>>;
-
-/// Per-connection prompt state shared with the handle and the optional model
-/// call proxy.
-struct TurnActivity {
-    permissions: PendingPermissions,
-    turns: RunningTurns,
-    /// Observed provider requests that must report before their turn finishes.
-    calls_in_flight: Arc<model_proxy::CallsInFlight>,
-}
-
-struct RunningTurn {
-    generation: u64,
-    cancelling: bool,
-    retry: tokio::sync::watch::Sender<prompt_retry::State>,
-    steering: Arc<steering::Turn>,
-}
-
-enum Control {
-    Command(AgentCommand),
-    Stop,
-}
-
-/// Process IDs of the agent tree that stopping the connection must not end.
-type PreservedProcesses = Arc<Mutex<Vec<u32>>>;
-
-fn has_preserved_processes(preserved: &PreservedProcesses) -> bool {
-    preserved.lock().map(|ids| !ids.is_empty()).unwrap_or(false)
-}
-
-/// One agent process and ACP connection. Dropping it stops the process tree.
-pub struct AgentHandle {
-    controls: async_mpsc::UnboundedSender<Control>,
-    permissions: PendingPermissions,
-    preserved: PreservedProcesses,
-    child_pid: Arc<AtomicU32>,
-    stop_requested: Arc<AtomicBool>,
-    finished: mpsc::Receiver<()>,
-    worker: Option<std::thread::JoinHandle<()>>,
-}
-
-impl AgentHandle {
-    /// Start the worker thread, spawn the agent, and authenticate.
-    ///
-    /// Invalid settings and launch or protocol failures are reported as a
-    /// `stopped` event with a user-facing message; no process is started for
-    /// invalid settings. Only a failure to create the worker thread is returned.
-    pub fn open(launch: AgentLaunch, emit: Emit) -> Result<Self, String> {
-        let (controls, receiver) = async_mpsc::unbounded_channel();
-        let (finished_tx, finished) = mpsc::channel();
-        let permissions: PendingPermissions = Arc::new(Mutex::new(HashMap::new()));
-        let child_pid = Arc::new(AtomicU32::new(0));
-        let stop_requested = Arc::new(AtomicBool::new(false));
-        let preserved: PreservedProcesses = Arc::new(Mutex::new(Vec::new()));
-        let pending = permissions.clone();
-        let kept = preserved.clone();
-        let pid = child_pid.clone();
-        let stop = stop_requested.clone();
-        let worker = std::thread::Builder::new()
-            .name("lithe-acp-connection".into())
-            .spawn(move || {
-                let runtime = tokio::runtime::Builder::new_current_thread()
-                    .enable_all()
-                    .build();
-                let message = match runtime {
-                    Ok(runtime) => runtime
-                        .block_on(run_agent(
-                            launch,
-                            receiver,
-                            AgentProcessState {
-                                permissions: pending,
-                                preserved: kept,
-                                child_pid: pid,
-                                stop_requested: stop,
-                            },
-                            emit.clone(),
-                        ))
-                        .err(),
-                    Err(error) => Some(error.to_string()),
-                };
-                emit(AgentEvent::Stopped { message });
-                // log-exempt: 用户取消：AgentHandle 已关闭完成通道，放弃等待 worker 的退出通知。
-                let _ = finished_tx.send(());
-            })
-            .map_err(|error| error.to_string())?;
-        Ok(Self {
-            controls,
-            permissions,
-            preserved,
-            child_pid,
-            stop_requested,
-            finished,
-            worker: Some(worker),
-        })
-    }
-
-    /// Queue a command. Permission answers and cancel-time permission
-    /// rejection take effect immediately on the calling thread.
-    pub fn send(&self, command: AgentCommand) -> Result<(), String> {
-        match command {
-            AgentCommand::Permission {
-                request_id,
-                option_id,
-            } => answer_permission(&self.permissions, &request_id, option_id),
-            AgentCommand::PreserveProcesses { process_ids } => {
-                let mut preserved = self
-                    .preserved
-                    .lock()
-                    .map_err(|_| "Agent process state is unavailable".to_string())?;
-                preserved.extend(process_ids);
-                preserved.sort_unstable();
-                preserved.dedup();
-                Ok(())
-            }
-            command => {
-                if let AgentCommand::Cancel { session_id } = &command {
-                    // ACP requires pending permission requests of a cancelled
-                    // turn to be answered `cancelled`; do it before queuing.
-                    reject_pending_permissions(&self.permissions, Some(session_id));
-                }
-                self.controls
-                    .send(Control::Command(command))
-                    .map_err(|_| "Agent connection has stopped".into())
-            }
-        }
-    }
-
-    /// Stop the connection and bound cleanup of the subprocess tree.
-    pub fn close(mut self) {
-        self.stop();
-    }
-
-    fn stop(&mut self) {
-        if self.worker.is_none() {
-            return;
-        }
-        reject_pending_permissions(&self.permissions, None);
-        self.stop_requested.store(true, Ordering::Release);
-        // log-exempt: 用户取消：Agent worker 已退出并关闭控制通道，不再等待 Stop。
-        let _ = self.controls.send(Control::Stop);
-        if self.finished.recv_timeout(STOP_TIMEOUT).is_err() {
-            let pid = self.child_pid.load(Ordering::SeqCst);
-            if pid != 0 {
-                if has_preserved_processes(&self.preserved) {
-                    force_kill_process(pid);
-                } else {
-                    force_kill_tree(pid);
-                }
-            }
-            crate::failure_log::worker_stop(self.finished.recv_timeout(STOP_TIMEOUT));
-        }
-        if let Some(worker) = self.worker.take() {
-            if worker.is_finished() {
-                crate::failure_log::outcome(
-                    "agent.host.operation_failed",
-                    "worker_join",
-                    worker.join(),
-                    "panic",
-                    "thread",
-                );
-            }
-        }
-    }
-}
-
-impl Drop for AgentHandle {
-    fn drop(&mut self) {
-        self.stop();
-    }
-}
-
-/// Deliver a user decision; `None` rejects. Fails once the request is gone.
-fn answer_permission(
-    permissions: &PendingPermissions,
-    request_id: &str,
-    option_id: Option<String>,
-) -> Result<(), String> {
-    let pending = permissions
-        .lock()
-        .ok()
-        .and_then(|mut pending| pending.remove(request_id));
-    match pending {
-        Some(pending) => {
-            // log-exempt: 用户取消：ACP permission 请求方已结束该请求，放弃等待用户决定。
-            let _ = pending.reply.send(option_id);
-            Ok(())
-        }
-        None => Err("The permission request is no longer pending".into()),
-    }
-}
-
-fn reject_pending_permissions(permissions: &PendingPermissions, session_id: Option<&str>) {
-    if let Ok(mut pending) = permissions.lock() {
-        let ids: Vec<String> = pending
-            .iter()
-            .filter(|(_, entry)| session_id.is_none_or(|id| entry.session_id == id))
-            .map(|(id, _)| id.clone())
-            .collect();
-        for id in ids {
-            if let Some(entry) = pending.remove(&id) {
-                // log-exempt: 用户取消：被取消的 ACP permission 请求方已退出，放弃等待拒绝应答。
-                let _ = entry.reply.send(None);
-            }
-        }
-    }
-}
-
-/// The caller holds the ownership lock also used during permission registration,
-/// so a terminal child cannot acquire a new pending request after this sweep.
-fn reject_ended_subagent_permissions(
-    permissions: &PendingPermissions,
-    sessions: &subagents::Sessions,
-) {
-    if let Ok(mut pending) = permissions.lock() {
-        let ids: Vec<_> = pending
-            .iter()
-            .filter(|(_, entry)| !sessions.is_live(&entry.source_session_id))
-            .map(|(id, _)| id.clone())
-            .collect();
-        for id in ids {
-            if let Some(entry) = pending.remove(&id) {
-                // log-exempt: 用户取消：已结束子 Agent 的 permission 请求方已退出，放弃等待拒绝应答。
-                let _ = entry.reply.send(None);
-            }
-        }
-    }
-}
-
-/// Bounded buffer of the most recent agent stderr bytes.
-#[derive(Default)]
-struct StderrTail(VecDeque<u8>);
-
-impl StderrTail {
-    fn push(&mut self, bytes: &[u8]) {
-        self.0.extend(bytes);
-        let excess = self.0.len().saturating_sub(STDERR_TAIL_BYTES);
-        self.0.drain(..excess);
-    }
-
-    /// Last lines of stderr with the API key removed, or `None` when empty.
-    fn summary(&self, secret: &str) -> Option<String> {
-        let (front, back) = self.0.as_slices();
-        let text = String::from_utf8_lossy(&[front, back].concat()).into_owned();
-        let lines: Vec<&str> = text
-            .lines()
-            .filter(|line| !line.trim().is_empty())
-            .collect();
-        let start = lines.len().saturating_sub(STDERR_TAIL_LINES);
-        let tail = lines[start..].join("\n");
-        (!tail.is_empty()).then(|| redact(&tail, secret))
-    }
-}
-
-fn redact(text: &str, secret: &str) -> String {
-    if secret.is_empty() {
-        text.to_owned()
-    } else {
-        text.replace(secret, "<redacted>")
-    }
-}
-
-/// Child `PATH`: the executable's directory, then `base`. Package managers
-/// such as npm install an agent script next to the `node` it runs with, and
-/// `base` carries the login shell's `PATH`, which GUI apps do not inherit.
-fn child_path(command: &Path, base: Option<OsString>) -> Option<OsString> {
-    let mut paths: Vec<PathBuf> = command
-        .parent()
-        .filter(|dir| dir.is_absolute())
-        .map(Path::to_path_buf)
-        .into_iter()
-        .collect();
-    if let Some(base) = base {
-        paths.extend(std::env::split_paths(&base));
-    }
-    (!paths.is_empty())
-        .then(|| std::env::join_paths(paths).ok())
-        .flatten()
-}
-
-/// State shared between an [`AgentHandle`] and its connection worker.
-struct AgentProcessState {
-    permissions: PendingPermissions,
-    preserved: PreservedProcesses,
-    child_pid: Arc<AtomicU32>,
-    stop_requested: Arc<AtomicBool>,
-}
-
-async fn run_agent(
-    launch: AgentLaunch,
-    controls: async_mpsc::UnboundedReceiver<Control>,
-    state: AgentProcessState,
-    emit: Emit,
-) -> Result<(), String> {
-    let AgentProcessState {
-        permissions,
-        preserved,
-        child_pid,
-        stop_requested,
-    } = state;
-    let cancelled = || stop_requested.load(Ordering::Acquire);
-    let observe_model_calls = launch.observe_model_calls;
-    let observe_subagents = launch.observe_subagents;
-    let process_scope = launch.process_scope.clone();
-    let mut launch = resolve_with_cancel(launch, &cancelled)?;
-    if cancelled() {
-        return Err("Agent launch was cancelled".into());
-    }
-    let turns: RunningTurns = Arc::new(Mutex::new(HashMap::new()));
-    let calls_in_flight = Arc::new(model_proxy::CallsInFlight::default());
-    let observation_upstream = observe_model_calls
-        .then(|| {
-            launch
-                .gateway
-                .as_ref()
-                .map(|route| route.base_url.clone())
-                .or_else(|| {
-                    launch
-                        .subscription_cli
-                        .as_ref()
-                        .map(|_| subscription::INFERENCE_ORIGIN.to_owned())
-                })
-                .or_else(|| {
-                    // The proxy forwards to the official origin only. A user who
-                    // reaches Claude through their own base URL keeps it.
-                    (launch.claude_subscription
-                        && !claude_subscription::has_custom_base_url(&launch))
-                    .then(|| claude_subscription::INFERENCE_ORIGIN.to_owned())
-                })
-        })
-        .flatten();
-    let _model_calls = match observation_upstream {
-        Some(upstream) => {
-            let running = turns.clone();
-            let session: model_proxy::SessionResolver =
-                Arc::new(move || sole_running_session(&running));
-            let calls = emit.clone();
-            let tracker = model_call_statistics::StatisticsTracker::default();
-            let sink: model_proxy::CallSink =
-                Arc::new(move |session_id, after_turn_finished, call| {
-                    let statistics = tracker.contribution(session_id.as_deref(), &call);
-                    calls(AgentEvent::ModelCall {
-                        session_id,
-                        after_turn_finished,
-                        call,
-                        statistics,
-                    })
-                });
-            // Statistics are optional. A proxy that cannot start leaves the
-            // configured endpoint in place rather than blocking the Agent.
-            match model_proxy::start(&upstream, session, sink, calls_in_flight.clone()).await {
-                Ok(proxy) => {
-                    let configured = if let Some(route) = launch.gateway.as_mut() {
-                        route.base_url = proxy.base_url().to_owned();
-                        true
-                    } else if launch.claude_subscription {
-                        claude_subscription::observe_model_calls(&mut launch, proxy.base_url());
-                        true
-                    } else {
-                        subscription::observe_model_calls(&mut launch, proxy.base_url()).is_ok()
-                    };
-                    if configured {
-                        Some(proxy)
-                    } else {
-                        failure_log::failed(
-                            "agent.observation.start_failed",
-                            "subscription_observation",
-                            "configuration",
-                            "agent",
-                        );
-                        None
-                    }
-                }
-                Err(_) => {
-                    failure_log::failed(
-                        "agent.observation.start_failed",
-                        "proxy_start",
-                        "start",
-                        "agent",
-                    );
-                    None
-                }
-            }
-        }
-        None => None,
-    };
-    // Before the relay replaces CODEX_PATH: history uses the user's CLI directly.
-    let history = codex_history::CodexHistory::for_launch(&launch);
-    let native_recovery = launch
-        .gateway
-        .as_ref()
-        .is_some_and(|route| route.native_recovery);
-    let codex_executable = if native_recovery {
-        Some(
-            launch
-                .env
-                .iter()
-                .find(|(name, _)| name == "CODEX_PATH")
-                .map(|(_, value)| PathBuf::from(value))
-                .ok_or("Codex executable is unavailable")?,
-        )
-    } else {
-        launch.subscription_cli.clone()
-    };
-    let mut context_recovery = if codex_executable.is_some() {
-        match codex_context::Recovery::start().await {
-            Ok(recovery) => Some(Arc::new(recovery)),
-            Err(error) => {
-                failure_log::failed(
-                    "agent.history.prepare_failed",
-                    "context_start",
-                    &format!("{:?}", error.kind()),
-                    "io",
-                );
-                None
-            }
-        }
-    } else {
-        None
-    };
-    let _relay = if let Some(executable) = codex_executable
-        .filter(|_| native_recovery || context_recovery.is_some() || _model_calls.is_some())
-    {
-        match codex_retry::Relay::create(&executable, native_recovery) {
-            Ok((relay, mut env)) => {
-                if let Some(recovery) = &context_recovery {
-                    env.push(("LITHE_CODEX_CONTEXT_URL".into(), recovery.url().into()));
-                }
-                if launch.subscription_cli.is_some() {
-                    if let Some(proxy) = &_model_calls {
-                        env.push((
-                            "LITHE_CODEX_OBSERVATION_BASE".into(),
-                            format!("{}/backend-api/codex", proxy.base_url()),
-                        ));
-                    }
-                }
-                launch.env.retain(|(name, _)| name != "CODEX_PATH");
-                launch.env.extend(env);
-                Some(relay)
-            }
-            Err(error) if native_recovery => return Err(error),
-            Err(_) => {
-                failure_log::failed(
-                    "agent.history.prepare_failed",
-                    "relay_prepare",
-                    "prepare",
-                    "agent",
-                );
-                context_recovery = None;
-                // Without the native account-routing guard, retain direct
-                // inference rather than bypassing managed residency rules.
-                if launch.subscription_cli.is_some() {
-                    if let Some((_, config)) = launch
-                        .env
-                        .iter_mut()
-                        .find(|(name, _)| name == "CODEX_CONFIG")
-                    {
-                        let mut value: serde_json::Value = serde_json::from_str(config)
-                            .map_err(|_| "Codex subscription configuration is unavailable")?;
-                        value["openai_base_url"] = serde_json::json!("");
-                        *config = value.to_string();
-                    }
-                }
-                None
-            }
-        }
-    } else {
-        None
-    };
-    let mut command = std::process::Command::new(&launch.command);
-    if launch.claude_subscription {
-        for name in claude_subscription::INHERITED_OVERRIDES {
-            command.env_remove(name);
-        }
-    } else if launch
-        .gateway
-        .as_ref()
-        .is_some_and(|route| route.protocol == ProviderProtocol::AnthropicMessages)
-    {
-        // An inherited model pin must not override the model restored by ACP.
-        // Keep the user's alias mappings and other native CLI settings intact.
-        command.env_remove("ANTHROPIC_MODEL");
-        // An inherited executable can be an unusable Windows batch shim. The
-        // launch environment below re-adds a valid path when one was resolved.
-        command.env_remove("CLAUDE_CODE_EXECUTABLE");
-    }
-    if launch.subscription_cli.is_some() {
-        subscription::isolate_environment(&mut command);
-    }
-    command
-        .args(&launch.args)
-        .current_dir(&launch.cwd)
-        .envs(launch.env.iter().map(|(key, value)| (key, value)));
-    let search_path =
-        environment::search_path_with_cancel(&cancelled).or_else(|| std::env::var_os("PATH"));
-    if cancelled() {
-        return Err("Agent launch was cancelled".into());
-    }
-    if let Some(path) = child_path(&launch.command, search_path) {
-        command.env("PATH", path);
-    }
-    if let Some(scope) = &process_scope {
-        command.env(AGENT_SCOPE_ENVIRONMENT, scope);
-    }
-    #[cfg(unix)]
-    {
-        use std::os::unix::process::CommandExt;
-        command.process_group(0);
-    }
-    let mut command = tokio::process::Command::from(command);
-    #[cfg(windows)]
-    {
-        command.creation_flags(CREATE_NO_WINDOW);
-    }
-    command
-        .stdin(Stdio::piped())
-        .stdout(Stdio::piped())
-        .stderr(Stdio::piped());
-    command.kill_on_drop(true);
-    let mut child = command
-        .spawn()
-        .map_err(|error| format!("Could not start the Agent: {error}"))?;
-    child_pid.store(child.id().unwrap_or(0), Ordering::SeqCst);
-    if cancelled() {
-        terminate_tree(&mut child).await;
-        child_pid.store(0, Ordering::SeqCst);
-        return Err("Agent launch was cancelled".into());
-    }
-    let stdin = child.stdin.take().ok_or("Agent stdin is unavailable")?;
-    let stdout = child.stdout.take().ok_or("Agent stdout is unavailable")?;
-    let mut stderr = child.stderr.take().ok_or("Agent stderr is unavailable")?;
-    let tail = Arc::new(Mutex::new(StderrTail::default()));
-    let stderr_tail = tail.clone();
-    let stderr_task = tokio::spawn(async move {
-        let mut buffer = [0u8; 4096];
-        while let Ok(read) = stderr.read(&mut buffer).await {
-            if read == 0 {
-                break;
-            }
-            if let Ok(mut tail) = stderr_tail.lock() {
-                tail.push(&buffer[..read]);
-            }
-        }
-    });
-    // Account credentials belong to the CLI in both subscription modes.
-    let subscription = launch.subscription_cli.is_some() || launch.claude_subscription;
-    let claude_subscription = launch.claude_subscription;
-    let claude_projects = launch.claude_projects.clone();
-    let secret = launch.secret.clone();
-    let transport = ByteStreams::new(stdin.compat_write(), stdout.compat());
-    let result = run_connection(
-        transport,
-        launch.cwd,
-        launch.gateway,
-        launch.subscription_cli,
-        launch.codex_home,
-        claude_subscription,
-        claude_projects,
-        history,
-        context_recovery,
-        observe_subagents,
-        controls,
-        TurnActivity {
-            permissions,
-            turns,
-            calls_in_flight,
-        },
-        emit,
-    )
-    .await;
-    // The connection may finish before the child exits. Never leave its process
-    // tree running, including wrapper commands which launch another process,
-    // unless the user chose to keep some of its tasks.
-    if has_preserved_processes(&preserved) {
-        terminate_process(&mut child).await;
-    } else {
-        terminate_tree(&mut child).await;
-    }
-    child_pid.store(0, Ordering::SeqCst);
-    crate::failure_log::nested(
-        "agent.host.operation_failed",
-        "stderr_join",
-        tokio::time::timeout(STOP_TIMEOUT, stderr_task).await,
-        "completion_failed",
-        "task",
-    );
-    result.map_err(|message| {
-        // The protocol error wraps this text as JSON data; return it verbatim so
-        // clients can localize the one actionable sign-in instruction.
-        if claude_subscription && message.contains(claude_subscription::SIGN_IN_REQUIRED) {
-            return claude_subscription::SIGN_IN_REQUIRED.to_owned();
-        }
-        let message = redact(&message, &secret);
-        // Subscription credentials belong to Codex, so Lithe has no secret to
-        // redact. Do not surface arbitrary upstream stderr for this mode.
-        if subscription {
-            return message;
-        }
-        match tail.lock().ok().and_then(|tail| tail.summary(&secret)) {
-            Some(stderr) => format!("{message}\n\nAgent output:\n{stderr}"),
-            None => message,
-        }
-    })
-}
-
-/// Provider requests carry no ACP session id. Attribute a model call only
-/// when exactly one non-cancelling prompt can have caused it.
-fn sole_running_session(turns: &RunningTurns) -> Option<model_proxy::CallOwner> {
-    let turns = turns.lock().ok()?;
-    let mut active = turns.iter().filter(|(_, turn)| !turn.cancelling);
-    match (active.next(), active.next()) {
-        (Some((session_id, turn)), None) => Some(model_proxy::CallOwner {
-            session: session_id.clone(),
-            generation: turn.generation,
-        }),
-        _ => None,
-    }
-}
-
-/// Ask the whole agent tree to exit, then force-kill whatever is left.
-///
-/// Agents such as codex-acp run a separate app-server that can outlive the
-/// wrapper by seconds after SIGTERM. Once the direct child exits, descendants
-/// are re-parented and no longer reachable from its PID, so the tree is
-/// recorded before signalling and survivors are killed by recorded PID.
-async fn terminate_tree(child: &mut tokio::process::Child) {
-    let Some(pid) = child.id() else {
-        return;
-    };
-    let tree: Vec<u32> = kill_tree::blocking::kill_tree(pid)
-        .map(|outputs| {
-            outputs
-                .into_iter()
-                .filter_map(|output| match output {
-                    kill_tree::Output::Killed { process_id, .. } => Some(process_id),
-                    kill_tree::Output::MaybeAlreadyTerminated { .. } => None,
-                })
-                .collect()
-        })
-        .unwrap_or_default();
-    // log-exempt: 预期的缺失：TERM 后尚未退出由下方强制终止和最终 wait 统一判定，当前宽限期结束不是清理失败。
-    let _ = tokio::time::timeout(STOP_TIMEOUT, child.wait()).await;
-    for process_id in tree {
-        force_kill_tree(process_id);
-    }
-    crate::failure_log::process_wait(
-        "agent.host.operation_failed",
-        "process_wait",
-        tokio::time::timeout(STOP_TIMEOUT, child.wait()).await,
-    );
-}
-
-/// End only the agent process: the host already ended the descendants the user
-/// did not keep, and signalling the tree or group would end the kept ones too.
-async fn terminate_process(child: &mut tokio::process::Child) {
-    #[cfg(unix)]
-    if let Some(pid) = child.id().and_then(|pid| libc::pid_t::try_from(pid).ok()) {
-        // SAFETY: `kill` only sends a signal to the direct child this
-        // connection spawned and has not yet reaped.
-        unsafe {
-            libc::kill(pid, libc::SIGTERM);
-        }
-        if tokio::time::timeout(STOP_TIMEOUT, child.wait())
-            .await
-            .is_ok()
-        {
-            return;
-        }
-    }
-    crate::failure_log::kill(
-        "agent.host.operation_failed",
-        "process_kill",
-        child.start_kill(),
-    );
-    crate::failure_log::process_wait(
-        "agent.host.operation_failed",
-        "process_wait",
-        tokio::time::timeout(STOP_TIMEOUT, child.wait()).await,
-    );
-}
-
-/// SIGKILL one process without touching its descendants or group.
-///
-/// Only hosts that send [`AgentCommand::PreserveProcesses`] reach this; the
-/// Windows host does not, and `kill_on_drop` still ends the direct child there.
-fn force_kill_process(process_id: u32) {
-    #[cfg(unix)]
-    if let Ok(pid) = libc::pid_t::try_from(process_id) {
-        // SAFETY: `kill` only sends a signal to one process ID.
-        unsafe {
-            libc::kill(pid, libc::SIGKILL);
-        }
-    }
-    #[cfg(not(unix))]
-    // log-exempt: 预期的缺失：非 Unix 平台没有单进程信号操作，此处只消费未使用的进程 ID。
-    let _ = process_id;
-}
-
-/// SIGKILL a process and its descendants; a process that already exited is ignored.
-///
-/// Children are started as process-group leaders, so on Unix the whole group is
-/// killed as well: a descendant forked after the tree snapshot would otherwise
-/// survive and keep the output pipes open.
-fn force_kill_tree(process_id: u32) {
-    let config = kill_tree::Config {
-        signal: "SIGKILL".into(),
-        include_target: true,
-    };
-    crate::failure_log::kill_tree(kill_tree::blocking::kill_tree_with_config(
-        process_id, &config,
-    ));
-    #[cfg(unix)]
-    if let Ok(group) = libc::pid_t::try_from(process_id) {
-        if group > 1 {
-            // SAFETY: `kill` only sends a signal; a negative id addresses the
-            // group this process created with `process_group(0)`.
-            unsafe {
-                libc::kill(-group, libc::SIGKILL);
-            }
-        }
-    }
-}
-
-async fn run_connection<OB, IB>(
-    transport: ByteStreams<OB, IB>,
-    cwd: PathBuf,
-    gateway: Option<GatewaySignIn>,
-    subscription_cli: Option<PathBuf>,
-    codex_home: Option<PathBuf>,
-    claude_subscription: bool,
-    claude_projects: Option<PathBuf>,
-    history: Option<codex_history::CodexHistory>,
-    context_recovery: Option<Arc<codex_context::Recovery>>,
-    observe_subagents: bool,
-    mut controls: async_mpsc::UnboundedReceiver<Control>,
-    activity: TurnActivity,
-    emit: Emit,
-) -> Result<(), String>
-where
-    OB: futures::io::AsyncWrite + Send + 'static,
-    IB: futures::io::AsyncRead + Send + 'static,
-{
-    let TurnActivity {
-        permissions,
-        turns,
-        calls_in_flight,
-    } = activity;
-    let session_meta = session_routing::metadata(gateway.as_ref())?;
-    let workspace = Arc::new(workspace_context::WorkspaceContext::new(&cwd)?);
-    let update_workspace = workspace.clone();
-    let desktop = Arc::new(Mutex::new(claude_desktop::Presenter::default()));
-    let update_desktop = desktop.clone();
-    let restored_meta = session_routing::restored_metadata(gateway.as_ref())?;
-    let (auth_tx, mut auth_rx) = tokio::sync::watch::channel(None::<subscription::AuthStatus>);
-    let updates = emit.clone();
-    let context_updates = context_recovery.clone();
-    let update_turns = turns.clone();
-    let subagent_sessions = Arc::new(Mutex::new(subagents::Sessions::default()));
-    let update_subagents = subagent_sessions.clone();
-    let permission_subagents = subagent_sessions.clone();
-    let update_permissions = permissions.clone();
-    let requests = emit.clone();
-    let permission_turns = turns.clone();
-    let cancel_permissions = permissions.clone();
-    let stop_requested = Arc::new(std::sync::atomic::AtomicBool::new(false));
-    let stopped = stop_requested.clone();
-    let finished_permissions = permissions.clone();
-    let result = Client
-        .builder()
-        .on_receive_notification(
-            async move |notification: subscription::AuthNotification, _| {
-                auth_tx.send_replace(Some(notification.auth_status));
-                Ok(())
-            },
-            agent_client_protocol::on_receive_notification!(),
-        )
-        .on_receive_notification(
-            async move |notification: subagents::Notification, _| {
-                if let Ok(update) = serde_json::to_value(notification.update) {
-                    let session_id = notification.session_id.0.to_string();
-                    if !observe_subagents && matches!(update["sessionUpdate"].as_str(), Some("subagent_spawned" | "subagent_state_update")) {
-                        return Ok(());
-                    }
-                    let owner = {
-                        let mut sessions = update_subagents.lock().map_err(|_| internal("Subagent ownership is unavailable"))?;
-                        if !sessions.observe(&session_id, &update) {
-                            return Err(internal("The Agent reported invalid subagent ownership"));
-                        }
-                        if update["sessionUpdate"] == "subagent_state_update" {
-                            reject_ended_subagent_permissions(&update_permissions, &sessions);
-                        }
-                        sessions.is_live(&session_id).then(|| sessions.root(&session_id)).flatten()
-                    };
-                    let Some(update) = update_workspace.present_update(update) else {
-                        return Ok(());
-                    };
-                    let presented = update_desktop.lock().map_err(|_| internal("Replay presentation is unavailable"))?.present(&session_id, update);
-                    for mut update in presented {
-                        // One evidence normalization for both products' edit review.
-                        edit_review::annotate(&mut update);
-                        if update["sessionUpdate"] == "usage_update" {
-                            if let Some(recovery) = &context_updates { recovery.prefer_upstream_report(&session_id); }
-                        }
-                        let mut reconnect = None;
-                        if let Ok(turns) = update_turns.lock() {
-                            if let Some(turn) = owner.as_ref().and_then(|id| turns.get(id)) {
-                                if owner.as_deref() == Some(session_id.as_str()) { turn.steering.observe(&update); }
-                                turn.retry.send_modify(|state| {
-                                    if prompt_retry::is_progress(&update) { state.progress(); }
-                                    // A child failure is the child's outcome, not a new
-                                    // failure or retry of the main Agent's model call.
-                                    if owner.as_deref() == Some(session_id.as_str()) {
-                                        state.observe_failure(&update);
-                                        reconnect = state.observe_native_retry(&update);
-                                    }
-                                });
-                            }
-                        }
-                        updates(AgentEvent::Update {
-                            session_id: session_id.clone(),
-                            update,
-                        });
-                        if let Some((turn_id, attempt, max_attempts)) = reconnect {
-                            updates(AgentEvent::TurnRetrying { session_id: session_id.clone(), turn_id, attempt, max_attempts });
-                        }
-                    }
-                }
-                Ok(())
-            },
-            agent_client_protocol::on_receive_notification!(),
-        )
-        .on_receive_request(
-            async move |request: RequestPermissionRequest, responder, connection| {
-                let source_session_id = request.session_id.0.to_string();
-                // Lock order is ownership -> pending requests -> running turns.
-                // Keep ownership through registration so terminal notifications
-                // cannot miss a requester checked just before it ended.
-                let sessions = permission_subagents.lock().map_err(|_| internal("Subagent ownership is unavailable"))?;
-                let session_id = sessions.is_live(&source_session_id).then(|| sessions.root(&source_session_id)).flatten();
-                let Some(session_id) = session_id else {
-                    return responder.respond(RequestPermissionResponse::new(RequestPermissionOutcome::Cancelled));
-                };
-                let request_id = uuid::Uuid::new_v4().to_string();
-                let (reply, receiver) = oneshot::channel();
-                // Register under the permission lock only while the turn is
-                // still running, so a concurrent cancel cannot miss it.
-                let activity = match permissions.lock() {
-                    Ok(mut pending) => {
-                        let running = permission_turns
-                            .lock()
-                            .ok()
-                            .and_then(|turns| {
-                                turns.get(&session_id)
-                                    .filter(|turn| !turn.cancelling)
-                                    .map(|turn| turn.retry.clone())
-                            });
-                        if let Some(activity) = &running {
-                            activity.send_modify(|state| state.permission_started());
-                            pending.insert(
-                                request_id.clone(),
-                                PendingPermission {
-                                    session_id: session_id.clone(),
-                                    source_session_id,
-                                    reply,
-                                },
-                            );
-                        }
-                        running
-                    }
-                    Err(_) => None,
-                };
-                drop(sessions);
-                let Some(activity) = activity else {
-                    return responder.respond(RequestPermissionResponse::new(
-                        RequestPermissionOutcome::Cancelled,
-                    ));
-                };
-                if let Ok(value) = serde_json::to_value(&request) {
-                    requests(AgentEvent::Permission {
-                        session_id,
-                        request_id: request_id.clone(),
-                        request: value,
-                    });
-                }
-                let permissions = permissions.clone();
-                // The SDK dispatches callbacks in order. Move the user wait into
-                // an SDK-owned task so updates, other permissions and EOF can flow.
-                connection.spawn(async move {
-                    // A user decision has no deadline. Cancellation, turn completion
-                    // and connection shutdown all settle the owned pending request.
-                    let selected = receiver.await.ok().flatten();
-                    if let Ok(mut pending) = permissions.lock() {
-                        pending.remove(&request_id);
-                    }
-                    activity.send_modify(|state| state.permission_finished());
-                    let outcome = match selected.filter(|id| {
-                        request
-                            .options
-                            .iter()
-                            .any(|option| option.option_id.0.as_ref() == id)
-                    }) {
-                        Some(id) => {
-                            RequestPermissionOutcome::Selected(SelectedPermissionOutcome::new(id))
-                        }
-                        None => RequestPermissionOutcome::Cancelled,
-                    };
-                    responder.respond(RequestPermissionResponse::new(outcome))
-                })?;
-                Ok(())
-            },
-            agent_client_protocol::on_receive_request!(),
-        )
-        // Without this, an agent that exits leaves the command loop waiting
-        // forever and the UI never learns the connection is gone.
-        .on_close(async |_| Err(internal("The Agent exited")))
-        .connect_with(transport, |connection: ConnectionTo<Agent>| async move {
-            // The public failure extension keeps synthetic API errors
-            // distinct from model output and carries their actionable titles.
-            let claude_api_key = gateway.as_ref().is_some_and(|route| route.protocol == ProviderProtocol::AnthropicMessages);
-            let typed_failures = claude_api_key || gateway.as_ref().is_some_and(|route| route.native_recovery);
-            let mut air_capabilities = if typed_failures { vec!["recommendedValue", "sessionFailure"] } else { vec!["recommendedValue"] };
-            if observe_subagents { air_capabilities.push("nativeSubagentSessions"); }
-            let capabilities = ClientCapabilities::new()
-                // Keep upstream advisories out of assistant transcript chunks.
-                .session(ClientSessionCapabilities::new().notices(NoticeCapabilities::new()))
-                .auth(AuthCapabilities::new().meta(serde_json::Map::from_iter([(
-                    GATEWAY_AUTH_METHOD.to_owned(),
-                    serde_json::Value::Bool(true),
-                )])))
-                .meta(serde_json::Map::from_iter([(
-                    "jetbrains".to_owned(),
-                    serde_json::json!({ "air": { "version": 1, "capabilities": air_capabilities } }),
-                )]));
-            let initialized = tokio::time::timeout(
-                HANDSHAKE_TIMEOUT,
-                connection
-                    .send_request(
-                        InitializeRequest::new(ProtocolVersion::V1)
-                            .client_capabilities(capabilities),
-                    )
-                    .block_task(),
-            )
-            .await
-            .map_err(|_| internal("The Agent did not finish initialization in time"))??;
-            // API-key routing is explicit and never falls back to account login.
-            if let Some(gateway) = gateway.as_ref().filter(|route| route.protocol != ProviderProtocol::AnthropicMessages) {
-                if !initialized
-                    .auth_methods
-                    .iter()
-                    .any(|method| method.id().0.as_ref() == GATEWAY_AUTH_METHOD)
-                {
-                    return Err(internal(
-                        "This Agent does not support signing in with a custom API key",
-                    ));
-                }
-                tokio::time::timeout(
-                    HANDSHAKE_TIMEOUT,
-                    connection
-                        .send_request(gateway_authentication(gateway))
-                        .block_task(),
-                )
-                .await
-                .map_err(|_| internal("The Agent did not finish API key sign-in in time"))??;
-            }
-            if claude_subscription {
-                let account = claude_subscription::ensure_signed_in(&mut auth_rx)
-                    .await
-                    .map_err(|message| internal(&message))?;
-                if let Some(account) = account {
-                    emit(AgentEvent::Account { account });
-                }
-            }
-            let account = if subscription_cli.is_some() {
-                if !initialized.auth_methods.iter().any(|method| method.id().0.as_ref() == "chat-gpt") {
-                    return Err(internal("This Codex adapter does not support ChatGPT sign-in"));
-                }
-                let Some(account) = subscription::authenticate(&connection, &mut auth_rx, &mut controls, &emit).await? else {
-                    stopped.store(true, Ordering::SeqCst);
-                    return Ok(());
-                };
-                emit(AgentEvent::Account { account: account.clone() });
-                Some(account)
-            } else { None };
-            let can_steer = steering::supported(initialized.meta.as_ref());
-            let tracks_detached_steering = initialized.agent_info.as_ref().is_some_and(
-                |info| info.name == "@agentclientprotocol/codex-acp"
-            );
-            let agent = initialized.agent_info.as_ref();
-            emit(AgentEvent::Ready {
-                agent_name: agent.map(|info| info.name.clone()),
-                agent_version: agent.map(|info| info.version.clone()),
-                can_load_sessions: initialized.agent_capabilities.load_session,
-                can_list_sessions: initialized
-                    .agent_capabilities
-                    .session_capabilities
-                    .list
-                    .is_some(),
-                can_list_archived_sessions: history.is_some(),
-                can_steer,
-            });
-
-            let quota_running = Arc::new(AtomicBool::new(false));
-            let mut last_quota = None::<tokio::time::Instant>;
-            let generations = AtomicU64::new(0);
-            let mut native_sequences = HashMap::<String, Arc<AtomicU64>>::new();
-            let mut tasks = JoinSet::new();
-            let (cancel_deadline_tx, mut cancel_deadlines) = async_mpsc::unbounded_channel();
-            let (steering_failure_tx, mut steering_failures) = async_mpsc::unbounded_channel::<String>();
-            loop {
-                let control = tokio::select! {
-                    Some(message) = steering_failures.recv() => return Err(internal(&message)),
-                    control = controls.recv() => match control {
-                        Some(control) => control,
-                        None => break,
-                    },
-                    changed = auth_rx.changed(), if account.is_some() => {
-                        if changed.is_err() { return Err(internal("Codex account reporting stopped")); }
-                        let status = auth_rx.borrow_and_update().clone();
-                        if status.as_ref().is_none_or(|status| status.kind != "account" ||
-                            status.account.as_ref().and_then(|a| a.email.as_ref()) != account.as_ref().and_then(|a| a.email.as_ref())) {
-                            return Err(internal("The local Codex account changed. Reconnect to use the current account."));
-                        }
-                        continue;
-                    }
-                    deadline = cancel_deadlines.recv() => {
-                        let Some((session_id, generation)) = deadline else { continue };
-                        if turns.lock().is_ok_and(|turns| turns.get(&session_id).is_some_and(
-                            |turn| turn.generation == generation && turn.cancelling
-                        )) {
-                            return Err(internal("The Agent did not acknowledge Stop. Its process has been stopped to prevent overlapping turns. Reconnect to reload the conversation."));
-                        }
-                        continue;
-                    }
-                };
-                while tasks.try_join_next().is_some() {}
-                let command = match control {
-                    Control::Stop => {
-                        stopped.store(true, Ordering::SeqCst);
-                        break;
-                    }
-                    Control::Command(command) => command,
-                };
-                match command {
-                    AgentCommand::Authenticate => {}
-                    AgentCommand::RefreshQuota => {
-                        let (Some(cli), Some(account)) = (&subscription_cli, &account) else { continue; };
-                        if quota_running.load(Ordering::SeqCst) || last_quota.is_some_and(|time| time.elapsed() < subscription::QUOTA_INTERVAL) { continue; }
-                        quota_running.store(true, Ordering::SeqCst);
-                        last_quota = Some(tokio::time::Instant::now());
-                        let (cli, cwd, account, emit, running, home) = (cli.clone(), cwd.clone(), account.clone(), emit.clone(), quota_running.clone(), codex_home.clone());
-                        tasks.spawn(async move {
-                            let result = subscription::read_quota(&cli, &cwd, &account, home.as_deref()).await;
-                            emit(match result {
-                                Ok(snapshot) => AgentEvent::Quota { snapshot },
-                                Err(code) => AgentEvent::QuotaFailed { code: code.into() },
-                            });
-                            running.store(false, Ordering::SeqCst);
-                        });
-                    }
-                    AgentCommand::NewSession { token } => {
-                        let subagents = subagent_sessions.clone();
-                        let connection = connection.clone();
-                        let emit = emit.clone();
-                        let cwd = cwd.clone();
-                        let session_meta = session_meta.clone();
-                        tasks.spawn(async move {
-                            let mut request = agent_client_protocol::schema::v1::NewSessionRequest::new(cwd);
-                            request.meta = session_meta;
-                            let result = request_with_timeout(
-                                SESSION_REQUEST_TIMEOUT,
-                                session_defaults::new_session(&connection, request),
-                            )
-                            .await;
-                            emit(match result {
-                                Ok(response) => match subagents.lock() {
-                                    Ok(mut sessions) => {
-                                        sessions.note_root(response.session_id.0.as_ref());
-                                        AgentEvent::SessionCreated {
-                                            token,
-                                            session_id: response.session_id.0.to_string(),
-                                            config_options: response.config_options,
-                                        }
-                                    }
-                                    Err(_) => failed(Some(token), None, "Subagent ownership is unavailable".into()),
-                                },
-                                Err(message) => failed(Some(token), None, message),
-                            });
-                        });
-                    }
-                    AgentCommand::LoadSession { token, session_id } => {
-                        {
-                            let mut sessions = subagent_sessions.lock().map_err(|_| internal("Subagent ownership is unavailable"))?;
-                            sessions.note_root(&session_id);
-                            sessions.clear(&session_id);
-                        }
-                        let connection = connection.clone();
-                        let emit = emit.clone();
-                        let cwd = cwd.clone();
-                        let session_meta = restored_meta.clone();
-                        let confirm_model = session_meta.is_some();
-                        let capture = context_recovery.as_ref().and_then(|recovery| recovery.capture(&session_id));
-                        let earlier = claude_projects.clone();
-                        let desktop = desktop.clone();
-                        tasks.spawn(async move {
-                            // Compaction hides earlier segments from the adapter's replay;
-                            // they precede it, so the transcript reads in order.
-                            if let Some(projects) = earlier {
-                                let (workspace, id) = (cwd.clone(), session_id.clone());
-                                let updates = tokio::task::spawn_blocking(move || {
-                                    claude_earlier_history::earlier_updates(&projects, &workspace, &id)
-                                })
-                                .await
-                                .unwrap_or_default();
-                                // Collected first: the guard must not live across `emit`.
-                                let updates: Vec<_> = match desktop.lock() {
-                                    Ok(mut desktop) => updates.into_iter().flat_map(|u| desktop.present(&session_id, u)).collect(),
-                                    Err(_) => updates,
-                                };
-                                for mut update in updates {
-                                    edit_review::annotate(&mut update);
-                                    emit(AgentEvent::Update { session_id: session_id.clone(), update });
-                                }
-                            }
-                            let mut request = LoadSessionRequest::new(session_id.clone(), cwd);
-                            request.meta = session_meta;
-                            let result = request_with_timeout(
-                                LOAD_SESSION_TIMEOUT,
-                                session_restore::load_session(&connection, request, confirm_model),
-                            )
-                            .await;
-                            if result.is_ok() {
-                                if let Some(capture) = capture {
-                                    if let Some(update) = capture.finish().await {
-                                        emit(AgentEvent::Update { session_id: session_id.clone(), update });
-                                    }
-                                }
-                            }
-                            emit(match result {
-                                Ok(response) => AgentEvent::SessionLoaded { token, session_id, config_options: response.config_options },
-                                Err(message) => failed(Some(token), Some(session_id), message),
-                            });
-                        });
-                    }
-                    AgentCommand::ListSessions { token } => {
-                        let connection = connection.clone();
-                        let emit = emit.clone();
-                        let cwd = cwd.clone();
-                        let workspace = workspace.clone();
-                        let history = history.clone();
-                        tasks.spawn(async move {
-                            let result = match history {
-                                Some(history) => history.list_active(&workspace, &token, &emit).await,
-                                None => list_sessions(&connection, cwd, &workspace, &token, &emit).await,
-                            };
-                            emit(match result {
-                                Ok(sessions) => AgentEvent::Sessions { token, sessions },
-                                Err(message) => failed(Some(token), None, message),
-                            });
-                        });
-                    }
-                    AgentCommand::ListArchivedSessions { token } => {
-                        let Some(history) = history.clone() else {
-                            emit(failed(Some(token), None, "This Agent has no archived history".into()));
-                            continue;
-                        };
-                        let emit = emit.clone();
-                        let workspace = workspace.clone();
-                        tasks.spawn(async move {
-                            emit(match history.list_archived(&workspace).await {
-                                Ok(archived) => AgentEvent::ArchivedSessions { token, sessions: archived.sessions, complete: archived.complete },
-                                Err(message) => failed(Some(token), None, message),
-                            });
-                        });
-                    }
-                    AgentCommand::UnarchiveSession { token, session_id } => {
-                        let Some(history) = history.clone() else {
-                            emit(failed(Some(token), Some(session_id), "This Agent has no archived history".into()));
-                            continue;
-                        };
-                        let emit = emit.clone();
-                        tasks.spawn(async move {
-                            emit(match history.unarchive(session_id.clone()).await {
-                                Ok(()) => AgentEvent::SessionUnarchived { token, session_id },
-                                Err(message) => failed(Some(token), Some(session_id), message),
-                            });
-                        });
-                    }
-                    AgentCommand::SetConfigOption { token, session_id, config_id, value } => {
-                        if turns.lock().is_ok_and(|turns| turns.contains_key(&session_id)) {
-                            emit(failed(Some(token), Some(session_id), "Wait for the current turn before changing configuration".into()));
-                            continue;
-                        }
-                        let connection = connection.clone();
-                        let emit = emit.clone();
-                        tasks.spawn(async move {
-                            let result = request_with_timeout(
-                                SESSION_REQUEST_TIMEOUT,
-                                connection.send_request(SetSessionConfigOptionRequest::new(session_id.clone(), config_id, value.as_str())).block_task(),
-                            ).await;
-                            emit(match result {
-                                Ok(response) => AgentEvent::SessionConfigured { token, session_id, config_options: response.config_options },
-                                Err(message) => failed(Some(token), Some(session_id), message),
-                            });
-                        });
-                    }
-                    AgentCommand::ApplyNextTurnConfiguration { token, session_id, catalog, choices } => {
-                        if turns.lock().is_ok_and(|turns| turns.contains_key(&session_id)) {
-                            emit(failed(Some(token), Some(session_id), "Wait for the current turn before changing configuration".into()));
-                            continue;
-                        }
-                        let connection = connection.clone();
-                        let emit = emit.clone();
-                        tasks.spawn(async move {
-                            let mut plan = next_turn_config::NextTurnPlan::new(catalog, choices);
-                            let mut latest = None;
-                            let (failure, message) = loop {
-                                let choice = match plan.next() {
-                                    next_turn_config::Step::Done => break (None, None),
-                                    next_turn_config::Step::Failed(failure) => break (Some(failure), None),
-                                    next_turn_config::Step::Send(choice) => choice,
-                                };
-                                let result = request_with_timeout(
-                                    SESSION_REQUEST_TIMEOUT,
-                                    connection.send_request(SetSessionConfigOptionRequest::new(
-                                        session_id.clone(), choice.config_id, choice.value.as_str(),
-                                    )).block_task(),
-                                ).await;
-                                match result {
-                                    Ok(response) => {
-                                        let confirmed = plan.confirm(next_turn_config::catalog(&response.config_options));
-                                        latest = Some(response.config_options);
-                                        if let Err(failure) = confirmed { break (Some(failure), None); }
-                                    }
-                                    Err(message) => break (Some(next_turn_config::ConfigFailure::RequestFailed), Some(message)),
-                                }
-                            };
-                            emit(AgentEvent::NextTurnConfigured { token, session_id, config_options: latest, failure, message });
-                        });
-                    }
-                    AgentCommand::Steer { token, session_id, text, files } => {
-                        let reject = |message: &str| emit(AgentEvent::SteeringResult {
-                            token: token.clone(), session_id: session_id.clone(),
-                            outcome: "failed".into(), message: Some(message.into()),
-                        });
-                        if !can_steer { reject("This Agent does not support messages while responding"); continue; }
-                        let content = match workspace.content(text, files) {
-                            Ok(content) => content,
-                            Err(message) => { reject(&message); continue; }
-                        };
-                        let reservation = turns.lock().ok().and_then(|turns| {
-                            turns.get(&session_id).map(|turn| {
-                                if turn.cancelling { return None; }
-                                turn.steering.begin().map(|idle| (turn.steering.clone(), idle, turn.retry.clone()))
-                            })
-                        });
-                        let Some(reservation) = reservation else {
-                            emit(AgentEvent::SteeringResult { token, session_id, outcome: "promptRequired".into(), message: None });
-                            continue;
-                        };
-                        let Some((progress, continuation_idle, retry)) = reservation else {
-                            reject("Wait for the pending message or Stop acknowledgement"); continue;
-                        };
-                        if matches!(content.first(), Some(ContentBlock::Text(text)) if text.text.trim_start().starts_with('/')) {
-                            // Codex ACP 1.13.1 also reports startedNewTurn for a
-                            // completed command that never starts a model turn.
-                            // Leave commands unconsumed so the client submits
-                            // them after this turn, with an owned prompt response.
-                            emit(AgentEvent::SteeringResult { token, session_id, outcome: "promptRequired".into(), message: None });
-                            progress.finish(None);
-                            continue;
-                        }
-                        let (connection, emit, fatal) = (connection.clone(), emit.clone(), steering_failure_tx.clone());
-                        tasks.spawn(async move {
-                            let result = tokio::time::timeout(SESSION_REQUEST_TIMEOUT,
-                                connection.send_request(steering::request(&session_id, content)).block_task()).await;
-                            let mut detached = false;
-                            let (outcome, message) = match result {
-                                Ok(Ok(response)) => {
-                                    match response.outcome.as_str() {
-                                        "injected" => ("injected", None),
-                                        "startedNewTurn" if tracks_detached_steering => { detached = true; ("injected", None) },
-                                        "startedNewTurn" => {
-                                            // log-exempt: 用户取消：ACP 连接控制循环已退出，放弃等待 steering 致命失败通知。
-                                            let _ = fatal.send("This Agent started an untracked continuation. Reconnect and check the conversation before retrying.".into());
-                                            return;
-                                        },
-                                        "promptRequired" => ("promptRequired", None),
-                                        _ => ("failed", Some("The Agent did not accept the supplementary message".into())),
-                                    }
-                                },
-                                Ok(Err(error)) => ("failed", Some(prompt_retry::error_message(&error))),
-                                Err(_) => {
-                                    // A timed-out extension might still consume the input.
-                                    // Stop the connection rather than retrying it blindly.
-                                    // log-exempt: 用户取消：ACP 连接控制循环已退出，放弃等待 steering 超时通知。
-                                    let _ = fatal.send("The Agent did not confirm the supplementary message. Reconnect and check the conversation before retrying.".into());
-                                    return;
-                                }
-                            };
-                            if detached && retry.borrow().cancelling {
-                                crate::failure_log::cancel_notification(connection.send_notification(CancelNotification::new(session_id.clone())));
-                            }
-                            emit(AgentEvent::SteeringResult { token, session_id, outcome: outcome.into(), message });
-                            // Publish delivery before releasing the terminal-event barrier.
-                            progress.finish(detached.then_some(continuation_idle));
-                        });
-                    }
-                    AgentCommand::Prompt { session_id, text, files } => {
-                        let content = match workspace.content(text, files) {
-                            Ok(content) => content,
-                            Err(message) => {
-                                emit(failed(None, Some(session_id), message));
-                                continue;
-                            }
-                        };
-                        let generation = generations.fetch_add(1, Ordering::SeqCst) + 1;
-                        let retry_enabled = gateway.as_ref().is_some_and(|route| route.protocol == ProviderProtocol::AnthropicMessages);
-                        let native_recovery = gateway.as_ref().is_some_and(|route| route.native_recovery);
-                        let retry_state = if native_recovery {
-                            let sequence = native_sequences.entry(session_id.clone()).or_insert_with(|| Arc::new(AtomicU64::new(0))).clone();
-                            prompt_retry::State::native(sequence)
-                        } else { prompt_retry::State::new(retry_enabled) };
-                        let (retry, retry_changes) = tokio::sync::watch::channel(retry_state);
-                        let steering = Arc::new(steering::Turn::default());
-                        let busy = match turns.lock() {
-                            Ok(mut turns) if !turns.contains_key(&session_id) => {
-                                turns.insert(session_id.clone(), RunningTurn { generation, cancelling: false, retry: retry.clone(), steering: steering.clone() });
-                                false
-                            }
-                            _ => true,
-                        };
-                        if busy {
-                            emit(failed(
-                                None,
-                                Some(session_id),
-                                "The Agent is still responding in this conversation".into(),
-                            ));
-                            continue;
-                        }
-                        let request = PromptRequest::new(session_id.clone(), content);
-                        let connection = connection.clone();
-                        let prompt_response = prompt_retry::run(connection.clone(), request, retry.clone(), retry_changes.clone(), uuid::Uuid::new_v4().to_string(), emit.clone());
-                        let mut response = Box::pin(async move {
-                            let response = prompt_response.await;
-                            let continued = steering.settled().await.map_err(|message| internal(&message))?;
-                            if continued {
-                                // A detached continuation has no ACP usage response;
-                                // its native terminal state supersedes the original
-                                // response (which may have failed before steering).
-                                Ok(agent_client_protocol::schema::v1::PromptResponse::new(
-                                    agent_client_protocol::schema::v1::StopReason::EndTurn,
-                                ))
-                            } else {
-                                response
-                            }
-                        });
-                        let emit = emit.clone();
-                        let turns = turns.clone();
-                        let prompt_permissions = cancel_permissions.clone();
-                        let cancel_deadline = cancel_deadline_tx.clone();
-                        let calls_in_flight = calls_in_flight.clone();
-                        tasks.spawn(async move {
-                            let result = prompt_retry::wait(response.as_mut(), retry_changes, |quiet| {
-                                emit(AgentEvent::TurnActivity { session_id: session_id.clone(), quiet });
-                            }).await;
-                            if result.is_err() {
-                                let timeout_message = retry.borrow().timeout_message();
-                                // Cancel an expired recovery budget, but keep the turn
-                                // registered until the agent acknowledges it to prevent a
-                                // late response from overlapping a new prompt.
-                                let current = turns.lock().is_ok_and(|mut turns| {
-                                    let Some(turn) = turns.get_mut(&session_id) else {
-                                        return false;
-                                    };
-                                    if turn.generation != generation {
-                                        return false;
-                                    }
-                                    turn.cancelling = true;
-                                    turn.retry.send_modify(|state| state.cancelling = true);
-                                    true
-                                });
-                                if !current {
-                                    return;
-                                }
-                                reject_pending_permissions(&prompt_permissions, Some(&session_id));
-                                crate::failure_log::cancel_notification(connection
-                                    .send_notification(CancelNotification::new(session_id.clone())));
-                                emit(AgentEvent::TurnCancelling {
-                                    session_id: session_id.clone(),
-                                });
-
-                                // A terminal failure also releases the UI's busy state, so
-                                // report it only after cancellation has settled. Even a
-                                // late successful response cannot erase the timeout error.
-                                match tokio::time::timeout(CANCEL_TIMEOUT, response.as_mut()).await {
-                                    Ok(_) => {
-                                        let current = turns.lock().is_ok_and(|mut turns| {
-                                            let current = turns.get(&session_id).is_some_and(
-                                                |turn| turn.generation == generation,
-                                            );
-                                            if current {
-                                                turns.remove(&session_id);
-                                            }
-                                            current
-                                        });
-                                        if current {
-                                            reject_pending_permissions(
-                                                &prompt_permissions,
-                                                Some(&session_id),
-                                            );
-                                            calls_in_flight.finish_turn(&session_id, generation);
-                                            emit(failed(
-                                                None,
-                                                Some(session_id),
-                                                timeout_message,
-                                            ));
-                                        }
-                                    }
-                                    Err(_) => {
-                                        // Keep the turn registered so the outer loop stops the
-                                        // connection instead of allowing a stale request to
-                                        // overlap.
-                                        calls_in_flight.finish_turn(&session_id, generation);
-                                        emit(failed(
-                                            None,
-                                            Some(session_id.clone()),
-                                            timeout_message,
-                                        ));
-                                        // log-exempt: 用户取消：ACP 连接控制循环已退出，放弃等待 prompt 取消期限通知。
-                                        let _ = cancel_deadline.send((session_id, generation));
-                                    }
-                                }
-                                return;
-                            }
-
-                            let current = turns.lock().is_ok_and(|mut turns| {
-                                let current = turns
-                                    .get(&session_id)
-                                    .is_some_and(|turn| turn.generation == generation);
-                                if current {
-                                    turns.remove(&session_id);
-                                }
-                                current
-                            });
-                            if !current {
-                                return;
-                            }
-                            reject_pending_permissions(&prompt_permissions, Some(&session_id));
-                            // The proxy reports a call when its response stream
-                            // ends, which can trail the prompt response.
-                            calls_in_flight.settle(&session_id, MODEL_CALL_SETTLE_TIMEOUT).await;
-                            calls_in_flight.finish_turn(&session_id, generation);
-                            emit(match result {
-                                Ok(Ok(mut response)) => {
-                                    if retry.borrow().cancelling {
-                                        response.stop_reason = agent_client_protocol::schema::v1::StopReason::Cancelled;
-                                    }
-                                    prompt::finished(session_id, response)
-                                },
-                                Ok(Err(error)) => failed(None, Some(session_id), prompt_retry::error_message(&error)),
-                                Err(_) => unreachable!("recovery deadline handled above"),
-                            });
-                        });
-                    }
-                    AgentCommand::Cancel { session_id } => {
-                        let generation = turns
-                            .lock()
-                            .ok()
-                            .and_then(|mut turns| {
-                                let turn = turns.get_mut(&session_id)?;
-                                if turn.cancelling { return None; }
-                                turn.cancelling = true;
-                                turn.retry.send_modify(|state| state.cancelling = true);
-                                Some(turn.generation)
-                            });
-                        // A request registered after the caller's rejection but before
-                        // this point would otherwise remain pending after cancellation.
-                        reject_pending_permissions(&cancel_permissions, Some(&session_id));
-                        if let Some(generation) = generation {
-                            crate::failure_log::cancel_notification(connection
-                                .send_notification(CancelNotification::new(session_id.clone())));
-                            emit(AgentEvent::TurnCancelling {
-                                session_id: session_id.clone(),
-                            });
-                            let deadline = cancel_deadline_tx.clone();
-                            tasks.spawn(async move {
-                                tokio::time::sleep(CANCEL_TIMEOUT).await;
-                                // log-exempt: 用户取消：ACP 连接控制循环已退出，放弃等待用户 Stop 的期限通知。
-                                let _ = deadline.send((session_id, generation));
-                            });
-                        }
-                    }
-                    AgentCommand::Permission { .. } | AgentCommand::PreserveProcesses { .. } => {}
-                }
-            }
-            let running: Vec<String> = turns
-                .lock()
-                .map(|turns| turns.keys().cloned().collect())
-                .unwrap_or_default();
-            for session_id in running {
-                crate::failure_log::cancel_notification(connection.send_notification(CancelNotification::new(session_id)));
-            }
-            tasks.abort_all();
-            while tasks.join_next().await.is_some() {}
-            Ok(())
-        })
-        .await
-        .map_err(|error| error.to_string());
-    // EOF and protocol failures also revoke approvals owned by this connection.
-    reject_pending_permissions(&finished_permissions, None);
-    match result {
-        Ok(()) if !stop_requested.load(Ordering::SeqCst) => {
-            Err("The Agent connection closed unexpectedly".into())
-        }
-        other => other,
-    }
-}
-
-fn internal(message: &str) -> agent_client_protocol::Error {
-    agent_client_protocol::util::internal_error(message)
-}
-
-fn failed(token: Option<String>, session_id: Option<String>, message: String) -> AgentEvent {
-    AgentEvent::RequestFailed {
-        token,
-        session_id,
-        message,
-    }
-}
-
-async fn request_with_timeout<T>(
-    limit: Duration,
-    request: impl std::future::Future<Output = Result<T, agent_client_protocol::Error>>,
-) -> Result<T, String> {
-    match tokio::time::timeout(limit, request).await {
-        Ok(result) => result.map_err(|error| error.to_string()),
-        Err(_) => Err("The Agent did not respond in time".into()),
-    }
-}
-
-fn gateway_authentication(gateway: &GatewaySignIn) -> AuthenticateRequest {
-    let headers: serde_json::Map<String, serde_json::Value> = gateway
-        .headers
-        .iter()
-        .map(|(name, value)| (name.clone(), serde_json::Value::String(value.clone())))
-        .collect();
-    let mut settings = serde_json::json!({ "baseUrl": gateway.base_url, "headers": headers });
-    if let Some(name) = gateway
-        .provider_name
-        .as_deref()
-        .filter(|name| !name.is_empty())
-    {
-        settings["providerName"] = serde_json::Value::String(name.to_owned());
-    }
-    AuthenticateRequest::new(GATEWAY_AUTH_METHOD).meta(serde_json::Map::from_iter([(
-        GATEWAY_AUTH_METHOD.to_owned(),
-        settings,
-    )]))
-}
-
-/// ACP wire name of a stop reason, e.g. `end_turn`.
-fn stop_reason_name(reason: &agent_client_protocol::schema::v1::StopReason) -> String {
-    match serde_json::to_value(reason) {
-        Ok(serde_json::Value::String(name)) => name,
-        _ => "unknown".into(),
-    }
-}
-
-async fn list_sessions(
-    connection: &ConnectionTo<Agent>,
-    cwd: PathBuf,
-    workspace: &workspace_context::WorkspaceContext,
-    token: &str,
-    emit: &Emit,
-) -> Result<Vec<AgentSessionSummary>, String> {
-    let mut sessions = Vec::new();
-    let mut cursor: Option<String> = None;
-    for _ in 0..MAX_SESSION_LIST_PAGES {
-        let page = request_with_timeout(
-            SESSION_REQUEST_TIMEOUT,
-            connection
-                .send_request(
-                    ListSessionsRequest::new()
-                        .cwd(cwd.clone())
-                        .cursor(cursor.take()),
-                )
-                .block_task(),
-        )
-        .await?;
-        let entries: Vec<_> = page
-            .sessions
-            .into_iter()
-            .map(|session| AgentSessionSummary {
-                session_id: session.session_id.0.to_string(),
-                title: session
-                    .title
-                    .and_then(|title| workspace.present_title(&title)),
-                updated_at: session.updated_at,
-                model_provider: None,
-            })
-            .collect();
-        // Keep the final aggregate compatible with clients that do not consume pages.
-        // Publish intermediate rows before requesting the next page, never a false empty list.
-        if page
-            .next_cursor
-            .as_ref()
-            .is_some_and(|next| !next.is_empty())
-            && !entries.is_empty()
-        {
-            emit(AgentEvent::SessionsPage {
-                token: token.to_owned(),
-                sessions: entries.clone(),
-            });
-        }
-        sessions.extend(entries);
-        match page.next_cursor {
-            Some(next) if !next.is_empty() => cursor = Some(next),
-            _ => return Ok(sessions),
-        }
-    }
-    Ok(sessions)
-}
-
-#[cfg(test)]
-mod tests;
diff --git a/rust/lithe-agent-host/src/mcp_probe.rs b/rust/lithe-agent-host/src/mcp_probe.rs
deleted file mode 100644
index 1fd653e9..00000000
--- a/rust/lithe-agent-host/src/mcp_probe.rs
+++ /dev/null
@@ -1,296 +0,0 @@
-//! Explicit, short-lived MCP inventory probes using the official MCP SDK.
-//!
-//! Probes list metadata only. They never call tools, persist credentials or
-//! start automatically while the settings page is opening.
-
-use rmcp::{model::PaginatedRequestParams, ServiceExt};
-use serde::Deserialize;
-use serde_json::{json, Value};
-use std::{collections::HashSet, process::Stdio, time::Duration};
-use tokio::{io::AsyncReadExt, process::Command};
-mod http_client;
-
-/// User-reviewed connection, supplied by a platform's native configuration store.
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub struct Request {
-    /// `stdio`, `http`, or the legacy `sse` configuration type.
-    pub transport: String,
-    /// Executable, without shell evaluation.
-    pub command: Option<String>,
-    /// Exact argument boundaries, including empty and space-containing values.
-    #[serde(default)]
-    pub args: Vec<String>,
-    /// Environment overrides for this child only.
-    #[serde(default)]
-    pub env: Vec<Entry>,
-    /// Remote endpoint; HTTPS or loopback HTTP only.
-    pub url: Option<String>,
-    /// Explicit request headers. Values are never returned in errors.
-    #[serde(default)]
-    pub headers: Vec<Entry>,
-}
-
-/// One environment or HTTP header entry; never logged.
-#[derive(Deserialize)]
-#[serde(deny_unknown_fields)]
-pub struct Entry {
-    /// Environment or header name.
-    pub key: String,
-    /// User-supplied value; never included in diagnostics.
-    pub value: String,
-}
-
-/// Stable diagnostic category, deliberately independent of upstream error text.
-#[derive(Debug, PartialEq)]
-pub enum Error {
-    Invalid,
-    Unsupported,
-    Start,
-    Connection,
-    Limit,
-    Timeout,
-    Cancelled,
-}
-
-const DEADLINE: Duration = Duration::from_secs(30);
-const MAX_BYTES: u64 = 2 * 1024 * 1024;
-const MAX_TOOLS: usize = 1000;
-
-/// Runs one bounded probe on the calling worker thread. The caller owns cancel.
-pub fn execute(mut request: Request, cancelled: &dyn Fn() -> bool) -> Result<Value, Error> {
-    validate(&request)?;
-    if cancelled() {
-        return Err(Error::Cancelled);
-    }
-    if request.transport == "stdio" && !request.env.iter().any(|e| e.key == "PATH") {
-        if let Some(path) = crate::environment::search_path_with_cancel(cancelled) {
-            request.env.push(Entry {
-                key: "PATH".into(),
-                value: path.to_string_lossy().into_owned(),
-            });
-        }
-    }
-    if cancelled() {
-        return Err(Error::Cancelled);
-    }
-    let runtime = tokio::runtime::Builder::new_current_thread()
-        .enable_all()
-        .build()
-        .map_err(|_| Error::Start)?;
-    runtime.block_on(run(request, cancelled))
-}
-
-fn validate(r: &Request) -> Result<(), Error> {
-    let bytes = r.args.iter().map(String::len).sum::<usize>()
-        + r.env
-            .iter()
-            .chain(&r.headers)
-            .map(|e| e.key.len() + e.value.len())
-            .sum::<usize>();
-    if bytes > 1024 * 1024 || r.args.len() > 256 || r.env.len() > 128 || r.headers.len() > 128 {
-        return Err(Error::Invalid);
-    }
-    match r.transport.as_str() {
-        "stdio"
-            if r.command
-                .as_ref()
-                .is_some_and(|s| !s.is_empty() && !s.contains('\0')) =>
-        {
-            Ok(())
-        }
-        "http" => {
-            let u = url::Url::parse(r.url.as_deref().unwrap_or("")).map_err(|_| Error::Invalid)?;
-            let loopback = u.host_str().is_some_and(|s| {
-                s == "localhost" || s == "127.0.0.1" || s == "[::1]" || s == "::1"
-            });
-            if (u.scheme() != "https" && !(u.scheme() == "http" && loopback))
-                || u.host_str().is_none()
-                || !u.username().is_empty()
-                || u.password().is_some()
-                || u.fragment().is_some()
-            {
-                return Err(Error::Invalid);
-            }
-            Ok(())
-        }
-        "sse" => Err(Error::Unsupported),
-        _ => Err(Error::Invalid),
-    }
-}
-
-async fn run(r: Request, cancelled: &dyn Fn() -> bool) -> Result<Value, Error> {
-    let mut child = None;
-    let transport = r.transport.clone();
-    let mut command = if transport == "stdio" {
-        let path = r
-            .env
-            .iter()
-            .find(|e| e.key == "PATH")
-            .map(|e| std::ffi::OsStr::new(&e.value));
-        let executable =
-            crate::environment::find_executable(r.command.as_deref().ok_or(Error::Invalid)?, path)
-                .ok_or(Error::Start)?;
-        let mut cmd = Command::new(executable);
-        cmd.args(&r.args)
-            .stdin(Stdio::piped())
-            .stdout(Stdio::piped())
-            .stderr(Stdio::null())
-            .kill_on_drop(true);
-        for e in &r.env {
-            cmd.env(&e.key, &e.value);
-        }
-        #[cfg(unix)]
-        cmd.process_group(0);
-        #[cfg(windows)]
-        cmd.creation_flags(crate::CREATE_NO_WINDOW);
-        let mut spawned = cmd.spawn().map_err(|_| Error::Start)?;
-        let output = spawned.stdout.take().ok_or(Error::Start)?;
-        let input = spawned.stdin.take().ok_or(Error::Start)?;
-        child = Some(spawned);
-        // Bound the complete stdio metadata exchange, including an unterminated
-        // JSON line; SDK parsing cannot grow forever on a malicious child.
-        Some((output.take(MAX_BYTES), input))
-    } else {
-        None
-    };
-    let result = async {
-        if let Some(streams) = command.take() {
-            inventory(streams, cancelled).await
-        } else {
-            use rmcp::transport::streamable_http_client::{
-                StreamableHttpClientTransport, StreamableHttpClientTransportConfig,
-            };
-            let mut headers = http::HeaderMap::new();
-            for e in &r.headers {
-                let key = http::header::HeaderName::from_bytes(e.key.as_bytes())
-                    .map_err(|_| Error::Invalid)?;
-                // Session and content framing belong to the SDK, not user headers.
-                if matches!(
-                    key.as_str(),
-                    "host"
-                        | "content-length"
-                        | "content-type"
-                        | "accept"
-                        | "mcp-session-id"
-                        | "mcp-protocol-version"
-                ) {
-                    return Err(Error::Invalid);
-                }
-                let mut value =
-                    http::header::HeaderValue::from_str(&e.value).map_err(|_| Error::Invalid)?;
-                value.set_sensitive(true);
-                headers.insert(key, value);
-            }
-            let client = reqwest::Client::builder()
-                .default_headers(headers)
-                .redirect(reqwest::redirect::Policy::none())
-                .connect_timeout(Duration::from_secs(8))
-                .timeout(DEADLINE)
-                .build()
-                .map_err(|_| Error::Start)?;
-            let mut config =
-                StreamableHttpClientTransportConfig::with_uri(r.url.ok_or(Error::Invalid)?);
-            config.max_sse_event_size = MAX_BYTES as usize;
-            let http = StreamableHttpClientTransport::with_client(
-                http_client::BoundedClient(client),
-                config,
-            );
-            inventory(http, cancelled).await
-        }
-    }
-    .await;
-    if let Some(mut child) = child {
-        if let Some(pid) = child.id() {
-            crate::force_kill_tree(pid);
-        }
-        crate::failure_log::process_wait(
-            "agent.host.operation_failed",
-            "process_wait",
-            tokio::time::timeout(Duration::from_secs(3), child.wait()).await,
-        );
-    }
-    result
-}
-
-#[cfg(test)]
-mod tests;
-
-async fn inventory<T, E, A>(transport: T, cancelled: &dyn Fn() -> bool) -> Result<Value, Error>
-where
-    T: rmcp::transport::IntoTransport<rmcp::RoleClient, E, A>,
-    E: std::error::Error + Send + Sync + 'static,
-{
-    let deadline = tokio::time::Instant::now() + DEADLINE;
-    let cancel = async {
-        let mut ticks = tokio::time::interval(Duration::from_millis(50));
-        loop {
-            ticks.tick().await;
-            if cancelled() {
-                return;
-            }
-        }
-    };
-    tokio::pin!(cancel);
-    let service = tokio::select! {
-        _ = &mut cancel => return Err(Error::Cancelled),
-        _ = tokio::time::sleep_until(deadline) => return Err(Error::Timeout),
-        value = ().serve(transport) => value.map_err(|_| Error::Connection)?,
-    };
-    let listing = async {
-        let mut tools = Vec::new();
-        let mut names = HashSet::new();
-        let mut cursors = HashSet::new();
-        let mut cursor = None;
-        let mut size = 0;
-        for _ in 0..20 {
-            let mut params = PaginatedRequestParams::default();
-            params.cursor = cursor;
-            let page = service
-                .list_tools(Some(params))
-                .await
-                .map_err(|_| Error::Connection)?;
-            for tool in page.tools {
-                let name = tool.name.to_string();
-                let description = tool.description.unwrap_or_default().to_string();
-                size += name.len() + description.len();
-                if name.is_empty()
-                    || name.len() > 256
-                    || description.len() > 16384
-                    || size > MAX_BYTES as usize
-                    || tools.len() >= MAX_TOOLS
-                {
-                    return Err(Error::Limit);
-                }
-                if names.insert(name.clone()) {
-                    tools.push(json!({"name": name, "description": description}));
-                }
-            }
-            cursor = page.next_cursor;
-            if cursor.is_none() {
-                tools.sort_by(|a, b| a["name"].as_str().cmp(&b["name"].as_str()));
-                return Ok(json!({"tools": tools}));
-            }
-            if cursor.as_ref().is_some_and(|c| c.len() > 2048) {
-                return Err(Error::Limit);
-            }
-            if !cursors.insert(cursor.clone()) {
-                return Err(Error::Limit);
-            }
-        }
-        Err(Error::Limit)
-    };
-    let result = tokio::select! {
-        _ = &mut cancel => Err(Error::Cancelled),
-        _ = tokio::time::sleep_until(deadline) => Err(Error::Timeout),
-        value = listing => value,
-    };
-    crate::failure_log::nested(
-        "agent.host.operation_failed",
-        "probe_cancel",
-        tokio::time::timeout(Duration::from_secs(2), service.cancel()).await,
-        "completion_failed",
-        "task",
-    );
-    result
-}
diff --git a/rust/lithe-agent-host/src/mcp_probe/http_client.rs b/rust/lithe-agent-host/src/mcp_probe/http_client.rs
deleted file mode 100644
index 8fd6bf35..00000000
--- a/rust/lithe-agent-host/src/mcp_probe/http_client.rs
+++ /dev/null
@@ -1,174 +0,0 @@
-//! Bounded HTTP byte adapter for the official SDK's session/SSE transport.
-//! Keeps the existing reqwest/TLS stack and caps JSON, errors and SSE bodies
-//! before decoding; upstream's default JSON adapter reads an unbounded body.
-
-use super::MAX_BYTES;
-use futures::{stream::BoxStream, StreamExt};
-use http::{HeaderName, HeaderValue};
-use rmcp::{
-    model::{ClientJsonRpcMessage, ServerJsonRpcMessage},
-    transport::streamable_http_client::{
-        StreamableHttpClient, StreamableHttpError, StreamableHttpPostResponse,
-    },
-};
-use sse_stream::{Error as SseError, Sse, SseStream};
-use std::{collections::HashMap, io, sync::Arc};
-
-#[derive(Clone)]
-pub(super) struct BoundedClient(pub reqwest::Client);
-type Error = StreamableHttpError<io::Error>;
-fn failed() -> Error {
-    StreamableHttpError::Client(io::Error::other("MCP HTTP request failed"))
-}
-
-fn stream(response: reqwest::Response) -> BoxStream<'static, Result<bytes::Bytes, io::Error>> {
-    response
-        .bytes_stream()
-        .scan(0_u64, |size, chunk| {
-            let value = chunk.map_err(|_| io::Error::other("MCP response failed"));
-            if let Ok(bytes) = &value {
-                *size += bytes.len() as u64;
-            }
-            let value = if *size > MAX_BYTES {
-                Err(io::Error::other("MCP response limit"))
-            } else {
-                value
-            };
-            futures::future::ready(Some(value))
-        })
-        .boxed()
-}
-
-fn request(
-    client: &reqwest::Client,
-    method: reqwest::Method,
-    uri: &str,
-    session: Option<Arc<str>>,
-    auth: Option<String>,
-    headers: HashMap<HeaderName, HeaderValue>,
-) -> reqwest::RequestBuilder {
-    let mut r = client
-        .request(method, uri)
-        .header("accept", "application/json, text/event-stream");
-    if let Some(session) = session {
-        r = r.header("mcp-session-id", session.as_ref());
-    }
-    if let Some(auth) = auth {
-        r = r.bearer_auth(auth);
-    }
-    for (key, value) in headers {
-        r = r.header(key, value);
-    }
-    r
-}
-
-impl StreamableHttpClient for BoundedClient {
-    type Error = io::Error;
-
-    async fn post_message(
-        &self,
-        uri: Arc<str>,
-        message: ClientJsonRpcMessage,
-        session: Option<Arc<str>>,
-        auth: Option<String>,
-        headers: HashMap<HeaderName, HeaderValue>,
-    ) -> Result<StreamableHttpPostResponse, Error> {
-        let encoded = serde_json::to_vec(&message).map_err(|_| failed())?;
-        let response = request(
-            &self.0,
-            reqwest::Method::POST,
-            &uri,
-            session.clone(),
-            auth,
-            headers,
-        )
-        .header("content-type", "application/json")
-        .body(encoded)
-        .send()
-        .await
-        .map_err(|_| failed())?;
-        let status = response.status();
-        if status == reqwest::StatusCode::NOT_FOUND && session.is_some() {
-            return Err(StreamableHttpError::SessionExpired);
-        }
-        if matches!(status.as_u16(), 202 | 204) {
-            return Ok(StreamableHttpPostResponse::Accepted);
-        }
-        let session = response
-            .headers()
-            .get("mcp-session-id")
-            .and_then(|v| v.to_str().ok())
-            .map(str::to_owned);
-        let sse = response
-            .headers()
-            .get("content-type")
-            .and_then(|v| v.to_str().ok())
-            .is_some_and(|s| s.starts_with("text/event-stream"));
-        if response
-            .content_length()
-            .is_some_and(|size| size > MAX_BYTES)
-        {
-            return Err(failed());
-        }
-        if status.is_success() && sse {
-            return Ok(StreamableHttpPostResponse::Sse(
-                SseStream::from_bytes_stream(stream(response)).boxed(),
-                session,
-            ));
-        }
-        let mut bytes = Vec::new();
-        let mut input = stream(response);
-        while let Some(chunk) = input.next().await {
-            bytes.extend_from_slice(&chunk.map_err(|_| failed())?);
-        }
-        if bytes.is_empty() && status.is_success() {
-            return Ok(StreamableHttpPostResponse::Accepted);
-        }
-        // Keep valid JSON-RPC errors for SDK negotiation/fallback, but never
-        // return an arbitrary HTML/auth body in a user-visible diagnostic.
-        let parsed: ServerJsonRpcMessage = serde_json::from_slice(&bytes).map_err(|_| failed())?;
-        Ok(StreamableHttpPostResponse::Json(parsed, session))
-    }
-
-    async fn delete_session(
-        &self,
-        uri: Arc<str>,
-        session: Arc<str>,
-        auth: Option<String>,
-        headers: HashMap<HeaderName, HeaderValue>,
-    ) -> Result<(), Error> {
-        request(
-            &self.0,
-            reqwest::Method::DELETE,
-            &uri,
-            Some(session),
-            auth,
-            headers,
-        )
-        .send()
-        .await
-        .map_err(|_| failed())?;
-        Ok(())
-    }
-
-    async fn get_stream(
-        &self,
-        uri: Arc<str>,
-        session: Option<Arc<str>>,
-        last: Option<String>,
-        auth: Option<String>,
-        headers: HashMap<HeaderName, HeaderValue>,
-    ) -> Result<BoxStream<'static, Result<Sse, SseError>>, Error> {
-        let mut request = request(&self.0, reqwest::Method::GET, &uri, session, auth, headers);
-        if let Some(last) = last {
-            request = request.header("last-event-id", last);
-        }
-        let response = request
-            .send()
-            .await
-            .map_err(|_| failed())?
-            .error_for_status()
-            .map_err(|_| failed())?;
-        Ok(SseStream::from_bytes_stream(stream(response)).boxed())
-    }
-}
diff --git a/rust/lithe-agent-host/src/mcp_probe/tests.rs b/rust/lithe-agent-host/src/mcp_probe/tests.rs
deleted file mode 100644
index 5870359a..00000000
--- a/rust/lithe-agent-host/src/mcp_probe/tests.rs
+++ /dev/null
@@ -1,236 +0,0 @@
-//! Local transport fixtures never call a public server or an installed runtime.
-use super::*;
-use std::io::{BufRead, Write};
-
-fn fixture_request() -> Request {
-    Request {
-        transport: "stdio".into(),
-        command: Some(
-            std::env::current_exe()
-                .unwrap()
-                .to_string_lossy()
-                .into_owned(),
-        ),
-        args: vec![
-            "--exact".into(),
-            "mcp_probe::tests::fixture_server".into(),
-            "--nocapture".into(),
-        ],
-        env: vec![
-            Entry {
-                key: "LITHE_MCP_PROBE_FIXTURE".into(),
-                value: "1".into(),
-            },
-            Entry {
-                key: "PATH".into(),
-                value: std::env::var("PATH").unwrap_or_default(),
-            },
-        ],
-        url: None,
-        headers: vec![],
-    }
-}
-
-fn response(message: &Value) -> Option<Value> {
-    let id = message.get("id")?;
-    let result = match message["method"].as_str()? {
-        "server/discover" => {
-            return Some(
-                json!({"jsonrpc":"2.0","id":id,"error":{"code":-32601,"message":"Use initialize"}}),
-            )
-        }
-        "initialize" => {
-            json!({"protocolVersion":"2025-11-25","capabilities":{"tools":{}},"serverInfo":{"name":"fixture","version":"1"}})
-        }
-        "tools/list" if message["params"]["cursor"] == "next" => {
-            json!({"tools":[{"name":"second","description":"Fixture page two","inputSchema":{"type":"object"}}]})
-        }
-        "tools/list" => {
-            json!({"tools":[{"name":"first","description":std::process::id().to_string(),"inputSchema":{"type":"object"}}],"nextCursor":"next"})
-        }
-        _ => panic!("Probe attempted a method outside metadata listing"),
-    };
-    Some(json!({"jsonrpc":"2.0","id":id,"result":result}))
-}
-
-#[test]
-fn fixture_server() {
-    if std::env::var("LITHE_MCP_PROBE_FIXTURE").as_deref() != Ok("1") {
-        return;
-    }
-    // Child-only blocking stdin is owned by the parent probe's 30-second
-    // deadline and mandatory process-tree kill, never the test executor.
-    for line in std::io::stdin().lock().lines() {
-        let Ok(line) = line else {
-            break;
-        };
-        let Ok(value) = serde_json::from_str::<Value>(&line) else {
-            continue;
-        };
-        if value["method"] == "tools/list" {
-            if let Ok(address) = std::env::var("LITHE_MCP_FIXTURE_SIGNAL") {
-                let mut signal = std::net::TcpStream::connect(address).unwrap();
-                write!(signal, "{}", std::process::id()).unwrap();
-                continue;
-            }
-        }
-        if let Some(value) = response(&value) {
-            println!("{value}");
-            std::io::stdout().flush().unwrap();
-        }
-    }
-}
-
-#[test]
-fn real_stdio_probe_lists_pages_and_reaps_its_child() {
-    let value = execute(fixture_request(), &|| false).unwrap();
-    assert_eq!(value["tools"][0]["name"], "first");
-    assert_eq!(value["tools"][1]["name"], "second");
-    #[cfg(unix)]
-    {
-        let pid: i32 = value["tools"][0]["description"]
-            .as_str()
-            .unwrap()
-            .parse()
-            .unwrap();
-        // SAFETY: signal zero only checks whether the already-reaped child exists.
-        assert_eq!(unsafe { libc::kill(pid, 0) }, -1);
-    }
-}
-
-#[test]
-fn cancellation_and_invalid_remote_inputs_do_not_launch_anything() {
-    assert_eq!(
-        execute(fixture_request(), &|| true).unwrap_err(),
-        Error::Cancelled
-    );
-    for url in [
-        "http://example.invalid/mcp",
-        "https://user:token@example.invalid/mcp",
-        "file:///tmp/mcp",
-    ] {
-        let mut r = fixture_request();
-        r.transport = "http".into();
-        r.url = Some(url.into());
-        assert_eq!(execute(r, &|| false).unwrap_err(), Error::Invalid);
-    }
-}
-
-#[tokio::test(start_paused = true)]
-async fn silent_server_hits_virtual_deadline_and_cancellation_is_observed() {
-    let (client, _server) = tokio::io::duplex(4096);
-    let start = tokio::time::Instant::now();
-    let result = inventory(client, &|| false).await;
-    assert_eq!(result.unwrap_err(), Error::Timeout);
-    assert!(start.elapsed() <= DEADLINE + Duration::from_secs(2));
-    let (client, _server) = tokio::io::duplex(4096);
-    assert_eq!(
-        inventory(client, &|| true).await.unwrap_err(),
-        Error::Cancelled
-    );
-}
-
-#[tokio::test]
-async fn cancellation_after_stdio_handshake_reaps_the_live_child() {
-    let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
-    let mut request = fixture_request();
-    request.env.push(Entry {
-        key: "LITHE_MCP_FIXTURE_SIGNAL".into(),
-        value: listener.local_addr().unwrap().to_string(),
-    });
-    let cancelled = std::cell::Cell::new(false);
-    let cancel = || cancelled.get();
-    let signal = async {
-        let (mut stream, _) = listener.accept().await.unwrap();
-        let mut pid = String::new();
-        stream.read_to_string(&mut pid).await.unwrap();
-        cancelled.set(true);
-        pid
-    };
-    let (result, pid) = tokio::time::timeout(Duration::from_secs(5), async {
-        tokio::join!(run(request, &cancel), signal)
-    })
-    .await
-    .unwrap();
-    assert_eq!(result.unwrap_err(), Error::Cancelled);
-    #[cfg(unix)]
-    {
-        let pid: i32 = pid.parse().unwrap();
-        // SAFETY: signal zero only checks for the reaped fixture process.
-        assert_eq!(unsafe { libc::kill(pid, 0) }, -1);
-    }
-    #[cfg(not(unix))]
-    let _ = pid;
-}
-
-#[tokio::test]
-async fn real_loopback_http_probe_uses_the_same_inventory_protocol() {
-    use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader};
-    for mode in ["json", "sse", "oversized-header", "oversized-body"] {
-        let listener = tokio::net::TcpListener::bind("127.0.0.1:0").await.unwrap();
-        let address = listener.local_addr().unwrap();
-        let server = tokio::spawn(async move {
-            loop {
-                let (stream, _) = listener.accept().await.unwrap();
-                let mut reader = BufReader::new(stream);
-                let mut first = String::new();
-                reader.read_line(&mut first).await.unwrap();
-                let mut length = 0;
-                loop {
-                    let mut line = String::new();
-                    reader.read_line(&mut line).await.unwrap();
-                    if line == "\r\n" {
-                        break;
-                    }
-                    if let Some(value) = line.to_lowercase().strip_prefix("content-length:") {
-                        length = value.trim().parse::<usize>().unwrap();
-                    }
-                }
-                assert!(length < 16384);
-                let mut bytes = vec![0; length];
-                reader.read_exact(&mut bytes).await.unwrap();
-                let body = if first.starts_with("POST") {
-                    response(&serde_json::from_slice(&bytes).unwrap())
-                } else {
-                    None
-                };
-                let mut text = body.map(|v| v.to_string()).unwrap_or_default();
-                let content_type = if mode == "sse" {
-                    "text/event-stream"
-                } else {
-                    "application/json"
-                };
-                if mode == "sse" && !text.is_empty() {
-                    text = format!("event: message\ndata: {text}\n\n");
-                }
-                let reply = if mode == "oversized-header" {
-                    format!(
-                        "HTTP/1.1 200 OK\r\nContent-Length: {}\r\nConnection: close\r\n\r\n",
-                        MAX_BYTES + 1
-                    )
-                } else if mode == "oversized-body" {
-                    // No length header: enforce the cap while streaming, before JSON decode.
-                    format!("HTTP/1.1 200 OK\r\nContent-Type: application/json\r\nConnection: close\r\n\r\n{}", "x".repeat(MAX_BYTES as usize + 1))
-                } else {
-                    format!("HTTP/1.1 {}\r\nContent-Type: {}\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{}", if text.is_empty() { "202 Accepted" } else { "200 OK" }, content_type, text.len(), text)
-                };
-                // The client may reject the oversized response before all bytes are sent.
-                if reader.get_mut().write_all(reply.as_bytes()).await.is_err() {
-                    break;
-                }
-            }
-        });
-        let mut request = fixture_request();
-        request.transport = "http".into();
-        request.url = Some(format!("http://{address}/mcp"));
-        let result = tokio::time::timeout(Duration::from_secs(5), run(request, &|| false)).await;
-        server.abort();
-        let _ = server.await;
-        let result = result.unwrap();
-        if mode.starts_with("oversized") {
-            assert_eq!(result.unwrap_err(), Error::Connection);
-        } else {
-            assert_eq!(result.unwrap()["tools"].as_array().unwrap().len(), 2);
-        }
-    }
-}
diff --git a/rust/lithe-agent-host/src/model_call_statistics.rs b/rust/lithe-agent-host/src/model_call_statistics.rs
deleted file mode 100644
index 972aa2f1..00000000
--- a/rust/lithe-agent-host/src/model_call_statistics.rs
+++ /dev/null
@@ -1,262 +0,0 @@
-//! Shared accounting rules for observed model calls.
-//!
-//! The Host attaches one [`ModelCallStatistics`] contribution to every
-//! `modelCall` event, so both desktop products count the same request the same
-//! way: which calls are conversation steps, which failed, which count as
-//! non-streaming, which timings describe generation speed, and which request
-//! describes the current context. Platforms only add contributions with
-//! [`ModelCallStatistics::merge`]; they never reinterpret a raw call.
-//! Contract: `rust/fixtures/agent/model-call-statistics-v1.json`.
-
-use std::collections::HashSet;
-use std::sync::Mutex;
-
-use serde::{Deserialize, Serialize};
-
-use crate::model_calls::{ContextComposition, ModelCall};
-
-/// Additive statistics of one or more observed calls.
-///
-/// Every counter is a sum, `reasoning_tokens` is a sum over the calls that
-/// reported it, and `context` is the latest composition that may describe the
-/// conversation's current prompt. Merging contributions in event order yields
-/// the totals of a turn or a session.
-#[derive(Debug, Default, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ModelCallStatistics {
-    /// Observed provider requests, including auxiliary ones.
-    pub requests: u64,
-    /// Requests that are steps of the conversation (not auxiliary).
-    pub steps: u64,
-    /// Steps whose HTTP status is 400 or higher, including transport failures.
-    pub failed_steps: u64,
-    /// Successful steps answered without streaming. A failed response is an
-    /// error body, not a non-streaming answer, so it is never counted here.
-    pub non_streaming_steps: u64,
-    /// Milliseconds of complete step requests, including time to first token.
-    pub duration_ms: u64,
-    /// Provider prompt tokens outside the cache, from every request with usage.
-    pub input_tokens: u64,
-    pub cache_read_tokens: u64,
-    pub cache_write_tokens: u64,
-    pub output_tokens: u64,
-    /// Sum of reported reasoning tokens; absent when no call reported any.
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub reasoning_tokens: Option<u64>,
-    /// Requests whose response carried usage counters. Token sums cover only
-    /// these, so `requests > calls_with_usage` marks the sums as a lower bound.
-    pub calls_with_usage: u64,
-    /// Sum and count of first-token latencies of streaming steps.
-    pub first_token_ms: u64,
-    pub first_token_count: u64,
-    /// Streaming time after the first token and the output produced in it;
-    /// their ratio is the generation speed.
-    pub generation_ms: u64,
-    pub generated_tokens: u64,
-    /// Composition that replaces the current context, or absent when this
-    /// contribution does not describe the conversation's prompt.
-    #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub context: Option<ContextComposition>,
-}
-
-impl ModelCallStatistics {
-    /// Contribution of one call. `sends_tools` is the per-session memory that
-    /// the conversation's main requests carry tool definitions; once set, only
-    /// tool-carrying requests describe the current context, because tool-less
-    /// ones are background requests the marker did not recognize.
-    pub fn of_call(call: &ModelCall, sends_tools: &mut bool) -> Self {
-        let mut statistics = Self {
-            requests: 1,
-            ..Self::default()
-        };
-        if let Some(usage) = call.usage {
-            statistics.calls_with_usage = 1;
-            statistics.input_tokens = usage.input_tokens;
-            statistics.cache_read_tokens = usage.cache_read_tokens;
-            statistics.cache_write_tokens = usage.cache_write_tokens;
-            statistics.output_tokens = usage.output_tokens;
-            statistics.reasoning_tokens = usage.reasoning_tokens;
-        }
-        if call.auxiliary {
-            // Its tokens were spent, but a title request is neither a step nor
-            // a measure of latency, generation speed, or the current context.
-            return statistics;
-        }
-        let failed = call.status >= 400;
-        statistics.steps = 1;
-        statistics.failed_steps = u64::from(failed);
-        statistics.non_streaming_steps = u64::from(!call.streaming && !failed);
-        statistics.duration_ms = call.duration_ms;
-        if let (true, Some(first_token)) = (call.streaming, call.first_token_ms) {
-            statistics.first_token_ms = first_token;
-            statistics.first_token_count = 1;
-            if let Some(usage) = call.usage.filter(|_| call.duration_ms > first_token) {
-                statistics.generation_ms = call.duration_ms - first_token;
-                statistics.generated_tokens = usage.output_tokens;
-            }
-        }
-        if let Some(context) = call.context {
-            let carries_tools = context.tool_count + context.mcp_tool_count > 0;
-            if carries_tools || !*sends_tools {
-                statistics.context = Some(context);
-            }
-            *sends_tools |= carries_tools;
-        }
-        statistics
-    }
-
-    /// Adds a later contribution. A later context replaces an earlier one.
-    pub fn merge(&mut self, later: &Self) {
-        self.requests += later.requests;
-        self.steps += later.steps;
-        self.failed_steps += later.failed_steps;
-        self.non_streaming_steps += later.non_streaming_steps;
-        self.duration_ms += later.duration_ms;
-        self.input_tokens += later.input_tokens;
-        self.cache_read_tokens += later.cache_read_tokens;
-        self.cache_write_tokens += later.cache_write_tokens;
-        self.output_tokens += later.output_tokens;
-        if let Some(reasoning) = later.reasoning_tokens {
-            self.reasoning_tokens = Some(self.reasoning_tokens.unwrap_or(0) + reasoning);
-        }
-        self.calls_with_usage += later.calls_with_usage;
-        self.first_token_ms += later.first_token_ms;
-        self.first_token_count += later.first_token_count;
-        self.generation_ms += later.generation_ms;
-        self.generated_tokens += later.generated_tokens;
-        if later.context.is_some() {
-            self.context = later.context;
-        }
-    }
-}
-
-/// Per-connection memory of which sessions' main requests carry tools.
-/// Bounded by the sessions a connection prompts, which the connection owns.
-#[derive(Default)]
-pub(crate) struct StatisticsTracker {
-    sessions_sending_tools: Mutex<HashSet<String>>,
-}
-
-impl StatisticsTracker {
-    /// Contribution of a call attributed to `session_id`. Unattributed calls
-    /// are dropped by both products, so they keep no per-session memory.
-    pub(crate) fn contribution(
-        &self,
-        session_id: Option<&str>,
-        call: &ModelCall,
-    ) -> ModelCallStatistics {
-        let Some(session_id) = session_id else {
-            return ModelCallStatistics::of_call(call, &mut false);
-        };
-        let Ok(mut sessions) = self.sessions_sending_tools.lock() else {
-            return ModelCallStatistics::of_call(call, &mut false);
-        };
-        let mut sends_tools = sessions.contains(session_id);
-        let statistics = ModelCallStatistics::of_call(call, &mut sends_tools);
-        if sends_tools {
-            sessions.insert(session_id.to_owned());
-        }
-        statistics
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::model_calls::{ModelApi, ModelCallUsage};
-    use serde_json::Value;
-
-    fn call(value: &Value) -> ModelCall {
-        let usage = value.get("usage").map(|usage| ModelCallUsage {
-            input_tokens: usage["inputTokens"].as_u64().unwrap(),
-            cache_read_tokens: usage["cacheReadTokens"].as_u64().unwrap(),
-            cache_write_tokens: usage["cacheWriteTokens"].as_u64().unwrap(),
-            output_tokens: usage["outputTokens"].as_u64().unwrap(),
-            reasoning_tokens: usage["reasoningTokens"].as_u64(),
-        });
-        let context = value.get("context").map(|context| ContextComposition {
-            system_prompt_tokens: context["systemPromptTokens"].as_u64().unwrap(),
-            tool_tokens: context["toolTokens"].as_u64().unwrap(),
-            mcp_tool_tokens: context["mcpToolTokens"].as_u64().unwrap(),
-            message_tokens: context["messageTokens"].as_u64().unwrap(),
-            tool_count: context["toolCount"].as_u64().unwrap() as u32,
-            mcp_tool_count: context["mcpToolCount"].as_u64().unwrap() as u32,
-            scaled_to_usage: context["scaledToUsage"].as_bool().unwrap(),
-        });
-        ModelCall {
-            api: serde_json::from_value::<ModelApiName>(value["api"].clone())
-                .unwrap()
-                .0,
-            model: None,
-            status: value["status"].as_u64().unwrap() as u16,
-            streaming: value["streaming"].as_bool().unwrap_or(false),
-            first_token_ms: value["firstTokenMs"].as_u64(),
-            duration_ms: value["durationMs"].as_u64().unwrap(),
-            usage,
-            context,
-            auxiliary: value["auxiliary"].as_bool().unwrap_or(false),
-        }
-    }
-
-    /// `ModelApi` is output-only on the wire; the fixture names it by its value.
-    struct ModelApiName(ModelApi);
-    impl<'de> Deserialize<'de> for ModelApiName {
-        fn deserialize<D: serde::Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error> {
-            Ok(Self(match String::deserialize(deserializer)?.as_str() {
-                "anthropicMessages" => ModelApi::AnthropicMessages,
-                "responses" => ModelApi::Responses,
-                _ => ModelApi::ChatCompletions,
-            }))
-        }
-    }
-
-    /// Every fixture case fixes each call's contribution and the merged
-    /// totals both desktop products must display.
-    #[test]
-    fn fixture_contributions_and_totals_match() {
-        let fixture: Value = serde_json::from_str(include_str!(
-            "../../fixtures/agent/model-call-statistics-v1.json"
-        ))
-        .unwrap();
-        for case in fixture["cases"].as_array().unwrap() {
-            let name = case["name"].as_str().unwrap();
-            let tracker = StatisticsTracker::default();
-            let mut total = ModelCallStatistics::default();
-            let events = case["events"].as_array().unwrap();
-            for (index, event) in events.iter().enumerate() {
-                let contribution =
-                    tracker.contribution(event["sessionId"].as_str(), &call(&event["call"]));
-                let expected: ModelCallStatistics =
-                    serde_json::from_value(event["statistics"].clone()).unwrap();
-                assert_eq!(contribution, expected, "{name} call {index}");
-                assert_eq!(
-                    serde_json::to_value(&contribution).unwrap(),
-                    event["statistics"],
-                    "{name} call {index} wire shape"
-                );
-                total.merge(&contribution);
-            }
-            let expected: ModelCallStatistics =
-                serde_json::from_value(case["total"].clone()).unwrap();
-            assert_eq!(total, expected, "{name} total");
-        }
-    }
-
-    /// Sessions keep separate tool memory: one session's tool-carrying
-    /// request must not freeze another session's tool-less composition.
-    #[test]
-    fn tool_memory_is_per_session() {
-        let tracker = StatisticsTracker::default();
-        let tools = call(
-            &serde_json::json!({"api":"responses","status":200,"durationMs":1,
-            "context":{"systemPromptTokens":1,"toolTokens":1,"mcpToolTokens":0,"messageTokens":1,"toolCount":1,"mcpToolCount":0,"scaledToUsage":false}}),
-        );
-        let toolless = call(
-            &serde_json::json!({"api":"responses","status":200,"durationMs":1,
-            "context":{"systemPromptTokens":1,"toolTokens":0,"mcpToolTokens":0,"messageTokens":9,"toolCount":0,"mcpToolCount":0,"scaledToUsage":false}}),
-        );
-        assert!(tracker.contribution(Some("a"), &tools).context.is_some());
-        assert!(tracker.contribution(Some("a"), &toolless).context.is_none());
-        assert!(tracker.contribution(Some("b"), &toolless).context.is_some());
-    }
-}
diff --git a/rust/lithe-agent-host/src/model_calls.rs b/rust/lithe-agent-host/src/model_calls.rs
deleted file mode 100644
index 43dfb84c..00000000
--- a/rust/lithe-agent-host/src/model_calls.rs
+++ /dev/null
@@ -1,851 +0,0 @@
-//! Passive observation of individual model API calls made by an Agent.
-//!
-//! ACP reports only turn-level usage and context occupancy. When the user opts
-//! in, the loopback proxy in [`crate::model_proxy`] forwards each provider
-//! request unchanged and this module derives per-call facts from the bytes it
-//! has already seen: request composition, first-token latency, streaming mode
-//! and the provider's own usage counters. Parsing is strictly best effort. A
-//! provider format change can only remove fields from the observation; it can
-//! never alter or fail the forwarded exchange.
-//! Decision: .agents/notes/implemented/architecture/2026-10-13-agent-model-call-observation.md
-
-use std::time::{Duration, Instant};
-
-use serde::{Deserialize, Serialize};
-use serde_json::Value;
-
-/// Bound on one buffered SSE line or non-streaming body kept for parsing.
-/// Larger payloads are still forwarded; only their observation is dropped.
-const MAX_OBSERVED_BYTES: usize = 32 * 1024 * 1024;
-
-/// Provider wire protocol of an observed call, inferred from the request path.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub enum ModelApi {
-    AnthropicMessages,
-    Responses,
-    ChatCompletions,
-}
-
-impl ModelApi {
-    /// Only generation endpoints are model calls. Token counting, model
-    /// listing and other auxiliary requests are forwarded without an event.
-    pub(crate) fn from_path(path: &str) -> Option<Self> {
-        let path = path.split('?').next().unwrap_or(path).trim_end_matches('/');
-        if path.ends_with("/messages") {
-            Some(Self::AnthropicMessages)
-        } else if path.ends_with("/responses") {
-            Some(Self::Responses)
-        } else if path.ends_with("/chat/completions") {
-            Some(Self::ChatCompletions)
-        } else {
-            None
-        }
-    }
-}
-
-/// Provider-reported counters normalized to disjoint buckets.
-///
-/// `input_tokens` excludes cache reads and writes for every protocol, so the
-/// prompt size is always the sum of the three input buckets.
-#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ModelCallUsage {
-    pub input_tokens: u64,
-    pub cache_read_tokens: u64,
-    pub cache_write_tokens: u64,
-    pub output_tokens: u64,
-    /// Reasoning tokens when the provider reports them; already part of
-    /// `output_tokens` for OpenAI-compatible protocols.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub reasoning_tokens: Option<u64>,
-}
-
-impl ModelCallUsage {
-    fn prompt_tokens(&self) -> u64 {
-        self.input_tokens + self.cache_read_tokens + self.cache_write_tokens
-    }
-}
-
-/// Estimated split of one request's prompt. Byte sizes of the serialized
-/// sections are scaled to the provider-reported prompt tokens when available;
-/// otherwise a four-bytes-per-token approximation is used.
-#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ContextComposition {
-    pub system_prompt_tokens: u64,
-    /// Built-in tool definitions sent by the Agent.
-    pub tool_tokens: u64,
-    /// Tool definitions whose names use the `mcp__` prefix.
-    pub mcp_tool_tokens: u64,
-    pub message_tokens: u64,
-    pub tool_count: u32,
-    pub mcp_tool_count: u32,
-    /// `true` when the split was scaled to the provider's prompt counters.
-    pub scaled_to_usage: bool,
-}
-
-/// One forwarded generation request, as reported in the `modelCall` event.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ModelCall {
-    pub api: ModelApi,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub model: Option<String>,
-    /// Upstream HTTP status (200 for a WebSocket response), or 502 for
-    /// transport failure. A WebSocket error supplies its explicit status.
-    pub status: u16,
-    /// True for SSE and WebSocket streaming responses.
-    pub streaming: bool,
-    /// Milliseconds from forwarding the request to the first generated delta.
-    /// Absent for non-streaming responses and streams without output.
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub first_token_ms: Option<u64>,
-    /// Milliseconds from forwarding the request to the end of the response.
-    pub duration_ms: u64,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub usage: Option<ModelCallUsage>,
-    #[serde(skip_serializing_if = "Option::is_none")]
-    pub context: Option<ContextComposition>,
-    /// A background request the Agent makes for itself, such as naming the
-    /// session, rather than a step of the conversation. Its tokens are still
-    /// spent, but consumers must not count it as a step or a generation speed.
-    #[serde(skip_serializing_if = "is_false")]
-    pub auxiliary: bool,
-}
-
-fn is_false(value: &bool) -> bool {
-    !*value
-}
-
-/// Claude Code's session-naming request announces itself in its system prompt.
-/// Matching it is a best effort: a reworded prompt only makes the call count as
-/// a step again, never changes forwarding.
-const SESSION_NAMING_MARKER: &str = "naming a coding session";
-
-/// The announcement is the opening of the system prompt. Looking only at its
-/// first block keeps user instructions or skills appended later from matching,
-/// and avoids serializing the whole system value on every request.
-fn announces_session_naming(system: &Value) -> bool {
-    let first = match system {
-        Value::String(text) => Some(text.as_str()),
-        Value::Array(blocks) => blocks
-            .first()
-            .and_then(|block| block.get("text"))
-            .and_then(Value::as_str),
-        _ => None,
-    };
-    first.is_some_and(|text| text.contains(SESSION_NAMING_MARKER))
-}
-
-/// Serialized byte sizes of the parts of one generation request.
-#[derive(Debug, Default, Clone, PartialEq, Eq)]
-pub(crate) struct RequestShape {
-    pub(crate) model: Option<String>,
-    system_bytes: u64,
-    /// Standalone instructions are replaced rather than inherited by a
-    /// Responses continuation; system/developer input items remain in history.
-    instruction_bytes: u64,
-    tool_bytes: u64,
-    mcp_tool_bytes: u64,
-    message_bytes: u64,
-    tool_count: u32,
-    mcp_tool_count: u32,
-    auxiliary: bool,
-}
-
-/// Measure the request sections. Unknown or malformed bodies yield `None` and
-/// the call is still reported with timing and usage.
-pub(crate) fn request_shape(api: ModelApi, body: &[u8]) -> Option<RequestShape> {
-    let request: Value = serde_json::from_slice(body).ok()?;
-    let request = request.as_object()?;
-    let mut shape = RequestShape {
-        model: request
-            .get("model")
-            .and_then(Value::as_str)
-            .map(str::to_owned),
-        ..RequestShape::default()
-    };
-    for tool in request
-        .get("tools")
-        .and_then(Value::as_array)
-        .into_iter()
-        .flatten()
-    {
-        let name = tool
-            .get("name")
-            .or_else(|| {
-                tool.get("function")
-                    .and_then(|function| function.get("name"))
-            })
-            .and_then(Value::as_str)
-            .unwrap_or_default();
-        let bytes = serialized_len(tool);
-        if name.starts_with("mcp__") {
-            shape.mcp_tool_bytes += bytes;
-            shape.mcp_tool_count += 1;
-        } else {
-            shape.tool_bytes += bytes;
-            shape.tool_count += 1;
-        }
-    }
-    let (system, messages) = match api {
-        ModelApi::AnthropicMessages => (request.get("system"), request.get("messages")),
-        ModelApi::Responses => (request.get("instructions"), request.get("input")),
-        ModelApi::ChatCompletions => (None, request.get("messages")),
-    };
-    shape.auxiliary =
-        api == ModelApi::AnthropicMessages && system.is_some_and(announces_session_naming);
-    shape.instruction_bytes = system.map(text_len).unwrap_or_default();
-    shape.system_bytes += shape.instruction_bytes;
-    match messages {
-        Some(Value::Array(items)) => {
-            for item in items {
-                // OpenAI-compatible protocols carry instructions as messages.
-                let role = item.get("role").and_then(Value::as_str);
-                if api != ModelApi::AnthropicMessages
-                    && matches!(role, Some("system" | "developer"))
-                {
-                    shape.system_bytes += item.get("content").map(text_len).unwrap_or_default();
-                } else {
-                    shape.message_bytes += serialized_len(item);
-                }
-            }
-        }
-        Some(other) => shape.message_bytes += text_len(other),
-        None => {}
-    }
-    Some(shape)
-}
-
-impl RequestShape {
-    /// Reconstruct only sizes of a validated WebSocket continuation. No
-    /// request or response text survives an observed message.
-    pub(crate) fn continue_responses(
-        &mut self,
-        previous: &Self,
-        output: &Self,
-        inherits_instructions: bool,
-        inherits_tools: bool,
-    ) {
-        self.system_bytes += previous
-            .system_bytes
-            .saturating_sub(previous.instruction_bytes)
-            + output.system_bytes;
-        self.message_bytes += previous.message_bytes + output.message_bytes;
-        if inherits_instructions {
-            self.instruction_bytes = previous.instruction_bytes;
-            self.system_bytes += previous.instruction_bytes;
-        }
-        if inherits_tools {
-            self.tool_bytes = previous.tool_bytes;
-            self.mcp_tool_bytes = previous.mcp_tool_bytes;
-            self.tool_count = previous.tool_count;
-            self.mcp_tool_count = previous.mcp_tool_count;
-        }
-        if self.model.is_none() {
-            self.model = previous.model.clone();
-        }
-    }
-
-    /// Measure completed output items exactly as subsequent Responses input.
-    pub(crate) fn response_output(output: &Value) -> Option<Self> {
-        let items = output.as_array()?;
-        let shapes: Vec<_> = items.iter().map(Self::response_item).collect();
-        Some(Self::sum_outputs(shapes.iter()))
-    }
-
-    pub(crate) fn response_item(item: &Value) -> Self {
-        let mut shape = Self::default();
-        if matches!(
-            item.get("role").and_then(Value::as_str),
-            Some("system" | "developer")
-        ) {
-            shape.system_bytes = item.get("content").map(text_len).unwrap_or_default();
-        } else {
-            shape.message_bytes = serialized_len(item);
-        }
-        shape
-    }
-
-    pub(crate) fn sum_outputs<'a>(outputs: impl Iterator<Item = &'a Self>) -> Self {
-        outputs.fold(Self::default(), |mut sum, item| {
-            sum.system_bytes += item.system_bytes;
-            sum.message_bytes += item.message_bytes;
-            sum
-        })
-    }
-
-    fn composition(&self, usage: Option<&ModelCallUsage>) -> ContextComposition {
-        let sections = [
-            self.system_bytes,
-            self.tool_bytes,
-            self.mcp_tool_bytes,
-            self.message_bytes,
-        ];
-        let prompt = usage
-            .map(ModelCallUsage::prompt_tokens)
-            .filter(|tokens| *tokens > 0);
-        let tokens = match prompt {
-            Some(prompt) => allocate(prompt, sections),
-            None => sections.map(|bytes| bytes.div_ceil(4)),
-        };
-        ContextComposition {
-            system_prompt_tokens: tokens[0],
-            tool_tokens: tokens[1],
-            mcp_tool_tokens: tokens[2],
-            message_tokens: tokens[3],
-            tool_count: self.tool_count,
-            mcp_tool_count: self.mcp_tool_count,
-            scaled_to_usage: prompt.is_some(),
-        }
-    }
-}
-
-/// Split `total` proportionally to `weights` with the largest-remainder method,
-/// so the parts always add up to the provider-reported total.
-fn allocate(total: u64, weights: [u64; 4]) -> [u64; 4] {
-    let sum: u128 = weights.iter().map(|weight| u128::from(*weight)).sum();
-    if sum == 0 {
-        // Without measurable sections the whole prompt is conversation input.
-        return [0, 0, 0, total];
-    }
-    let mut parts = [0u64; 4];
-    let mut remainders = [(0u128, 0usize); 4];
-    for (index, weight) in weights.iter().enumerate() {
-        let exact = u128::from(total) * u128::from(*weight);
-        parts[index] = (exact / sum) as u64;
-        remainders[index] = (exact % sum, index);
-    }
-    let mut left = total - parts.iter().sum::<u64>();
-    // Stable ordering keeps the result deterministic for equal remainders.
-    remainders.sort_by(|a, b| b.0.cmp(&a.0).then(a.1.cmp(&b.1)));
-    for (_, index) in remainders {
-        if left == 0 {
-            break;
-        }
-        parts[index] += 1;
-        left -= 1;
-    }
-    parts
-}
-
-fn serialized_len(value: &Value) -> u64 {
-    serde_json::to_vec(value).map_or(0, |bytes| bytes.len() as u64)
-}
-
-/// Text payload size without JSON quoting, for string or block-array content.
-fn text_len(value: &Value) -> u64 {
-    match value {
-        Value::String(text) => text.len() as u64,
-        Value::Null => 0,
-        other => serialized_len(other),
-    }
-}
-
-/// Incrementally observes one response body as it is forwarded.
-pub(crate) struct ResponseObserver {
-    api: ModelApi,
-    status: u16,
-    streaming: bool,
-    started: Instant,
-    first_token: Option<Duration>,
-    usage: Option<ModelCallUsage>,
-    /// Partial SSE line, or the whole body for non-streaming responses.
-    buffer: Vec<u8>,
-    /// Data lines of the SSE event being assembled.
-    event_data: String,
-    overflowed: bool,
-}
-
-impl ResponseObserver {
-    pub(crate) fn new(api: ModelApi, status: u16, streaming: bool, started: Instant) -> Self {
-        Self {
-            api,
-            status,
-            streaming,
-            started,
-            first_token: None,
-            usage: None,
-            buffer: Vec::new(),
-            event_data: String::new(),
-            overflowed: false,
-        }
-    }
-
-    pub(crate) fn feed(&mut self, chunk: &[u8], now: Instant) {
-        if self.overflowed {
-            return;
-        }
-        self.buffer.extend_from_slice(chunk);
-        if !self.streaming {
-            self.check_bound();
-            return;
-        }
-        while let Some(end) = self.buffer.iter().position(|byte| *byte == b'\n') {
-            let line: Vec<u8> = self.buffer.drain(..=end).collect();
-            let line = String::from_utf8_lossy(&line);
-            self.sse_line(line.trim_end_matches(['\n', '\r']), now);
-        }
-        self.check_bound();
-    }
-
-    /// Complete the observation. `request` supplies the composition measured
-    /// before forwarding.
-    pub(crate) fn finish(mut self, request: Option<&RequestShape>, now: Instant) -> ModelCall {
-        if self.streaming {
-            if !self.buffer.is_empty() && !self.overflowed {
-                let line = String::from_utf8_lossy(&std::mem::take(&mut self.buffer)).into_owned();
-                self.sse_line(line.trim_end_matches('\r'), now);
-            }
-            self.dispatch_event(now);
-        } else if !self.overflowed {
-            if let Ok(body) = serde_json::from_slice::<Value>(&self.buffer) {
-                if let Some(usage) = body.get("usage") {
-                    self.merge_usage(usage);
-                }
-            }
-        }
-        ModelCall {
-            api: self.api,
-            model: request.and_then(|request| request.model.clone()),
-            status: self.status,
-            streaming: self.streaming,
-            first_token_ms: self.first_token.map(millis),
-            duration_ms: millis(now.saturating_duration_since(self.started)),
-            usage: self.usage,
-            context: request.map(|request| request.composition(self.usage.as_ref())),
-            auxiliary: request.is_some_and(|request| request.auxiliary),
-        }
-    }
-
-    fn check_bound(&mut self) {
-        if self.buffer.len() > MAX_OBSERVED_BYTES || self.event_data.len() > MAX_OBSERVED_BYTES {
-            self.overflowed = true;
-            self.buffer = Vec::new();
-            self.event_data = String::new();
-        }
-    }
-
-    fn sse_line(&mut self, line: &str, now: Instant) {
-        if line.is_empty() {
-            self.dispatch_event(now);
-        } else if let Some(data) = line.strip_prefix("data:") {
-            if !self.event_data.is_empty() {
-                self.event_data.push('\n');
-            }
-            self.event_data
-                .push_str(data.strip_prefix(' ').unwrap_or(data));
-        }
-    }
-
-    fn dispatch_event(&mut self, now: Instant) {
-        if self.event_data.is_empty() {
-            return;
-        }
-        let data = std::mem::take(&mut self.event_data);
-        let Ok(event) = serde_json::from_str::<Value>(&data) else {
-            return;
-        };
-        self.event(&event, now);
-    }
-
-    /// SSE and WebSocket responses share provider counters and generated-delta
-    /// semantics; transport framing never participates in the token estimate.
-    pub(crate) fn event(&mut self, event: &Value, now: Instant) {
-        if let Some(status @ 400..=599) = event.get("status").and_then(Value::as_u64) {
-            self.status = status as u16;
-        }
-        if self.status < 400 && matches!(event["type"].as_str(), Some("error" | "response.failed"))
-        {
-            self.status = 502;
-        }
-        if self.first_token.is_none() && self.is_generated_delta(event) {
-            self.first_token = Some(now.saturating_duration_since(self.started));
-        }
-        let usage = match self.api {
-            ModelApi::AnthropicMessages => match event.get("type").and_then(Value::as_str) {
-                Some("message_start") => event
-                    .get("message")
-                    .and_then(|message| message.get("usage")),
-                Some("message_delta") => event.get("usage"),
-                _ => None,
-            },
-            ModelApi::Responses => match event.get("type").and_then(Value::as_str) {
-                Some("response.completed" | "response.incomplete" | "response.failed") => event
-                    .get("response")
-                    .and_then(|response| response.get("usage")),
-                _ => None,
-            },
-            ModelApi::ChatCompletions => event.get("usage"),
-        };
-        if let Some(usage) = usage.cloned() {
-            self.merge_usage(&usage);
-        }
-    }
-
-    fn is_generated_delta(&self, event: &Value) -> bool {
-        match self.api {
-            ModelApi::AnthropicMessages => {
-                event.get("type").and_then(Value::as_str) == Some("content_block_delta")
-            }
-            ModelApi::Responses => event
-                .get("type")
-                .and_then(Value::as_str)
-                .is_some_and(|kind| kind.ends_with(".delta")),
-            ModelApi::ChatCompletions => event
-                .get("choices")
-                .and_then(Value::as_array)
-                .into_iter()
-                .flatten()
-                .filter_map(|choice| choice.get("delta").and_then(Value::as_object))
-                .any(|delta| {
-                    ["content", "reasoning_content", "reasoning", "tool_calls"]
-                        .iter()
-                        .any(|key| delta.get(*key).is_some_and(|value| !is_empty(value)))
-                }),
-        }
-    }
-
-    /// Later counters replace earlier ones field by field. Anthropic sends the
-    /// prompt counters at `message_start` and the final output in `message_delta`.
-    fn merge_usage(&mut self, usage: &Value) {
-        if usage.is_null() {
-            return;
-        }
-        let mut merged = self.usage.unwrap_or_default();
-        let count = |value: Option<&Value>| value.and_then(Value::as_u64);
-        match self.api {
-            ModelApi::AnthropicMessages => {
-                if let Some(value) = count(usage.get("input_tokens")) {
-                    merged.input_tokens = value;
-                }
-                if let Some(value) = count(usage.get("cache_read_input_tokens")) {
-                    merged.cache_read_tokens = value;
-                }
-                if let Some(value) = count(usage.get("cache_creation_input_tokens")) {
-                    merged.cache_write_tokens = value;
-                }
-                if let Some(value) = count(usage.get("output_tokens")) {
-                    merged.output_tokens = value;
-                }
-            }
-            ModelApi::Responses | ModelApi::ChatCompletions => {
-                let (input, output) = if self.api == ModelApi::Responses {
-                    ("input_tokens", "output_tokens")
-                } else {
-                    ("prompt_tokens", "completion_tokens")
-                };
-                let details = if self.api == ModelApi::Responses {
-                    ("input_tokens_details", "output_tokens_details")
-                } else {
-                    ("prompt_tokens_details", "completion_tokens_details")
-                };
-                // OpenAI-compatible prompts include cache reads and writes;
-                // DeepSeek reports reads as `prompt_cache_hit_tokens` instead.
-                let detail =
-                    |key: &str| count(usage.get(details.0).and_then(|detail| detail.get(key)));
-                let cached = detail("cached_tokens")
-                    .or_else(|| count(usage.get("prompt_cache_hit_tokens")))
-                    .unwrap_or_default();
-                let written = detail("cache_write_tokens").unwrap_or_default();
-                if let Some(prompt) = count(usage.get(input)) {
-                    // Clamp malformed counters so the three buckets never exceed the prompt.
-                    merged.cache_read_tokens = cached.min(prompt);
-                    merged.cache_write_tokens = written.min(prompt - merged.cache_read_tokens);
-                    merged.input_tokens =
-                        prompt - merged.cache_read_tokens - merged.cache_write_tokens;
-                }
-                if let Some(value) = count(usage.get(output)) {
-                    merged.output_tokens = value;
-                }
-                if let Some(value) = count(
-                    usage
-                        .get(details.1)
-                        .and_then(|detail| detail.get("reasoning_tokens")),
-                ) {
-                    merged.reasoning_tokens = Some(value);
-                }
-            }
-        }
-        self.usage = Some(merged);
-    }
-}
-
-fn is_empty(value: &Value) -> bool {
-    match value {
-        Value::Null => true,
-        Value::String(text) => text.is_empty(),
-        Value::Array(items) => items.is_empty(),
-        _ => false,
-    }
-}
-
-fn millis(duration: Duration) -> u64 {
-    u64::try_from(duration.as_millis()).unwrap_or(u64::MAX)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use serde_json::json;
-
-    fn observe(api: ModelApi, streaming: bool, chunks: &[(&str, u64)]) -> ModelCall {
-        let start = Instant::now();
-        let mut observer = ResponseObserver::new(api, 200, streaming, start);
-        for (chunk, at) in chunks {
-            observer.feed(chunk.as_bytes(), start + Duration::from_millis(*at));
-        }
-        let end = start + Duration::from_millis(chunks.last().map_or(0, |(_, at)| *at));
-        observer.finish(None, end)
-    }
-
-    #[test]
-    fn only_generation_endpoints_are_model_calls() {
-        assert_eq!(
-            ModelApi::from_path("/v1/messages"),
-            Some(ModelApi::AnthropicMessages)
-        );
-        assert_eq!(
-            ModelApi::from_path("/v1/messages?beta=true"),
-            Some(ModelApi::AnthropicMessages)
-        );
-        assert_eq!(
-            ModelApi::from_path("/v1/responses"),
-            Some(ModelApi::Responses)
-        );
-        assert_eq!(
-            ModelApi::from_path("/api/v1/chat/completions"),
-            Some(ModelApi::ChatCompletions)
-        );
-        assert_eq!(ModelApi::from_path("/v1/messages/count_tokens"), None);
-        assert_eq!(ModelApi::from_path("/v1/models"), None);
-    }
-
-    #[test]
-    fn anthropic_stream_reports_first_delta_and_merged_usage() {
-        // A chunk boundary inside an SSE line must not lose the event.
-        let call = observe(ModelApi::AnthropicMessages, true, &[
-            ("event: message_start\ndata: {\"type\":\"message_start\",\"message\":{\"usage\":{\"input_tokens\":12,\"cache_read_input_tokens\":3000,\"cache_creation_input_tokens\":40,\"output_tokens\":1}}}\n\n", 300),
-            ("data: {\"type\":\"content_block_start\"}\n\ndata: {\"type\":\"content_bl", 450),
-            ("ock_delta\",\"delta\":{\"text\":\"Hi\"}}\n\n", 500),
-            ("data: {\"type\":\"message_delta\",\"usage\":{\"output_tokens\":250}}\n\n", 2500),
-        ]);
-        assert_eq!(call.first_token_ms, Some(500));
-        assert_eq!(call.duration_ms, 2500);
-        assert_eq!(
-            call.usage,
-            Some(ModelCallUsage {
-                input_tokens: 12,
-                cache_read_tokens: 3000,
-                cache_write_tokens: 40,
-                output_tokens: 250,
-                reasoning_tokens: None,
-            })
-        );
-    }
-
-    #[test]
-    fn responses_stream_normalizes_cached_input() {
-        let completed = json!({"type": "response.completed", "response": {"usage": {
-            "input_tokens": 5000, "input_tokens_details": {"cached_tokens": 4000},
-            "output_tokens": 300, "output_tokens_details": {"reasoning_tokens": 120}
-        }}});
-        let call = observe(ModelApi::Responses, true, &[
-            ("data: {\"type\":\"response.created\"}\r\n\r\n", 100),
-            ("data: {\"type\":\"response.reasoning_summary_text.delta\",\"delta\":\"x\"}\r\n\r\n", 900),
-            (&format!("data: {completed}\r\n\r\n"), 1500),
-        ]);
-        assert_eq!(call.first_token_ms, Some(900));
-        let usage = call.usage.unwrap();
-        assert_eq!(
-            (
-                usage.input_tokens,
-                usage.cache_read_tokens,
-                usage.output_tokens
-            ),
-            (1000, 4000, 300)
-        );
-        assert_eq!(usage.reasoning_tokens, Some(120));
-    }
-
-    #[test]
-    fn openai_compatible_cache_writes_are_a_separate_input_bucket() {
-        for (api, usage) in [
-            (
-                ModelApi::Responses,
-                json!({"type": "response.completed", "response": {"usage": {
-                "input_tokens": 1000, "input_tokens_details": {"cached_tokens": 600, "cache_write_tokens": 300},
-                "output_tokens": 10}}}),
-            ),
-            (
-                ModelApi::ChatCompletions,
-                json!({"choices": [], "usage": {
-                "prompt_tokens": 1000, "prompt_tokens_details": {"cached_tokens": 600, "cache_write_tokens": 300},
-                "completion_tokens": 10}}),
-            ),
-        ] {
-            let call = observe(api, true, &[(&format!("data: {usage}\n\n"), 10)]);
-            let usage = call.usage.unwrap();
-            assert_eq!(
-                (
-                    usage.input_tokens,
-                    usage.cache_read_tokens,
-                    usage.cache_write_tokens
-                ),
-                (100, 600, 300),
-                "{api:?}"
-            );
-        }
-        // Counters larger than the prompt are clamped instead of underflowing.
-        let call = observe(ModelApi::ChatCompletions, true, &[(
-            "data: {\"usage\":{\"prompt_tokens\":10,\"prompt_tokens_details\":{\"cached_tokens\":8,\"cache_write_tokens\":9}}}\n\n", 5)]);
-        let usage = call.usage.unwrap();
-        assert_eq!(
-            (
-                usage.input_tokens,
-                usage.cache_read_tokens,
-                usage.cache_write_tokens
-            ),
-            (0, 8, 2)
-        );
-    }
-
-    #[test]
-    fn chat_stream_ignores_role_only_chunks_and_reads_deepseek_cache_hits() {
-        let call = observe(ModelApi::ChatCompletions, true, &[
-            ("data: {\"choices\":[{\"delta\":{\"role\":\"assistant\",\"content\":\"\"}}]}\n\n", 200),
-            ("data: {\"choices\":[{\"delta\":{\"reasoning_content\":\"Hm\"}}]}\n\n", 700),
-            ("data: {\"choices\":[],\"usage\":{\"prompt_tokens\":900,\"prompt_cache_hit_tokens\":600,\"completion_tokens\":80}}\n\ndata: [DONE]\n\n", 1200),
-        ]);
-        assert_eq!(call.first_token_ms, Some(700));
-        let usage = call.usage.unwrap();
-        assert_eq!(
-            (
-                usage.input_tokens,
-                usage.cache_read_tokens,
-                usage.output_tokens
-            ),
-            (300, 600, 80)
-        );
-    }
-
-    #[test]
-    fn non_streaming_bodies_have_usage_but_no_first_token() {
-        let call = observe(
-            ModelApi::AnthropicMessages,
-            false,
-            &[
-                ("{\"usage\":{\"input_tokens\":10,", 400),
-                ("\"output_tokens\":20}}", 800),
-            ],
-        );
-        assert!(!call.streaming);
-        assert_eq!(call.first_token_ms, None);
-        assert_eq!(call.usage.map(|usage| usage.output_tokens), Some(20));
-    }
-
-    #[test]
-    fn malformed_or_unknown_events_only_remove_fields() {
-        // Format drift must degrade to an observation without usage, not a failure.
-        let call = observe(
-            ModelApi::Responses,
-            true,
-            &[("data: {not json\n\ndata: {\"type\":\"other\"}\n\n", 50)],
-        );
-        assert_eq!((call.first_token_ms, call.usage), (None, None));
-    }
-
-    #[test]
-    fn composition_is_scaled_to_reported_prompt_tokens() {
-        let body = json!({
-            "model": "claude-test",
-            "system": [{"type": "text", "text": "a".repeat(400)}],
-            "tools": [
-                {"name": "Read", "description": "b".repeat(200), "input_schema": {}},
-                {"name": "mcp__dbx__query", "description": "c".repeat(100), "input_schema": {}}
-            ],
-            "messages": [{"role": "user", "content": "d".repeat(600)}]
-        });
-        let shape =
-            request_shape(ModelApi::AnthropicMessages, body.to_string().as_bytes()).unwrap();
-        assert_eq!(shape.model.as_deref(), Some("claude-test"));
-        let usage = ModelCallUsage {
-            input_tokens: 100,
-            cache_read_tokens: 900,
-            ..ModelCallUsage::default()
-        };
-        let composition = shape.composition(Some(&usage));
-        assert!(composition.scaled_to_usage);
-        assert_eq!((composition.tool_count, composition.mcp_tool_count), (1, 1));
-        assert_eq!(
-            composition.system_prompt_tokens
-                + composition.tool_tokens
-                + composition.mcp_tool_tokens
-                + composition.message_tokens,
-            1000
-        );
-        assert!(composition.message_tokens > composition.system_prompt_tokens);
-        assert!(composition.tool_tokens > composition.mcp_tool_tokens);
-    }
-
-    #[test]
-    fn openai_instructions_and_developer_messages_count_as_system_prompt() {
-        let body = json!({
-            "instructions": "x".repeat(40),
-            "input": [
-                {"role": "developer", "content": "y".repeat(40)},
-                {"role": "user", "content": "hello"}
-            ],
-            "tools": [{"type": "function", "name": "shell"}, {"type": "web_search"}]
-        });
-        let shape = request_shape(ModelApi::Responses, body.to_string().as_bytes()).unwrap();
-        let composition = shape.composition(None);
-        assert!(!composition.scaled_to_usage);
-        assert_eq!(composition.system_prompt_tokens, 20);
-        assert_eq!(composition.tool_count, 2);
-        assert!(request_shape(ModelApi::Responses, b"not json").is_none());
-    }
-
-    #[test]
-    fn allocation_preserves_the_total_deterministically() {
-        assert_eq!(allocate(10, [1, 1, 1, 0]), [4, 3, 3, 0]);
-        assert_eq!(allocate(7, [0, 0, 0, 0]), [0, 0, 0, 7]);
-        assert_eq!(
-            allocate(u64::MAX, [u64::MAX, 1, 0, 0])
-                .iter()
-                .map(|part| u128::from(*part))
-                .sum::<u128>(),
-            u128::from(u64::MAX)
-        );
-    }
-
-    #[test]
-    fn claude_session_naming_requests_are_marked_auxiliary() {
-        let naming = br#"{"model":"m","system":[{"type":"text","text":"You are naming a coding session so the user can pick it out."}],"messages":[]}"#;
-        let turn = br#"{"model":"m","system":[{"type":"text","text":"You are a Claude agent."}],"messages":[]}"#;
-        assert!(
-            request_shape(ModelApi::AnthropicMessages, naming)
-                .unwrap()
-                .auxiliary
-        );
-        assert!(
-            !request_shape(ModelApi::AnthropicMessages, turn)
-                .unwrap()
-                .auxiliary
-        );
-        // Later system content that merely mentions the phrase is a real turn.
-        let mentioned = br#"{"model":"m","system":[{"type":"text","text":"You are a Claude agent."},{"type":"text","text":"CLAUDE.md: avoid naming a coding session."}],"messages":[]}"#;
-        assert!(
-            !request_shape(ModelApi::AnthropicMessages, mentioned)
-                .unwrap()
-                .auxiliary
-        );
-        // Only the Anthropic protocol carries this request.
-        assert!(
-            !request_shape(ModelApi::Responses, naming)
-                .unwrap()
-                .auxiliary
-        );
-    }
-}
diff --git a/rust/lithe-agent-host/src/model_proxy.rs b/rust/lithe-agent-host/src/model_proxy.rs
deleted file mode 100644
index 41293bda..00000000
--- a/rust/lithe-agent-host/src/model_proxy.rs
+++ /dev/null
@@ -1,928 +0,0 @@
-//! Opt-in loopback proxy between an Agent and its model provider.
-//!
-//! The Agent receives `http://127.0.0.1:<port>/<launch token>` instead of the
-//! configured endpoint. Every request is forwarded to that endpoint with the
-//! Agent's own headers and body; responses stream back byte for byte. Only
-//! generation requests are observed through [`crate::model_calls`]; every other
-//! request streams through without buffering. Same-origin redirects are mapped
-//! back onto the proxy so they keep working. The proxy never stores, logs or
-//! emits request content or credentials, binds only the loopback interface and
-//! rejects paths without the per-launch token. Its lifetime is one Agent
-//! connection; it writes no files.
-//! Decision: .agents/notes/implemented/architecture/2026-10-13-agent-model-call-observation.md
-
-use std::collections::HashMap;
-use std::convert::Infallible;
-use std::pin::Pin;
-use std::sync::{Arc, Mutex};
-use std::task::{Context, Poll};
-use std::time::{Duration, Instant};
-
-use bytes::Bytes;
-use futures::{Stream, StreamExt};
-use http_body_util::{combinators::UnsyncBoxBody, BodyExt, Full, StreamBody};
-use hyper::body::{Frame, Incoming};
-use hyper::header::{HeaderMap, HeaderName, HeaderValue};
-use hyper::{Request, Response, StatusCode};
-
-use crate::model_calls::{self, ModelApi, ModelCall, RequestShape, ResponseObserver};
-
-mod websocket;
-
-/// Generation request bodies up to this size are buffered to measure their
-/// composition. Larger bodies are still forwarded, just without composition.
-const OBSERVED_REQUEST_BYTES: usize = 32 * 1024 * 1024;
-/// Route segment for same-origin redirect targets outside the configured path.
-const ORIGIN_ROUTE: &str = "/~origin";
-const CONNECT_TIMEOUT: Duration = Duration::from_secs(30);
-
-/// Headers that describe one hop and must not be forwarded (RFC 9110 §7.6.1),
-/// plus fields the forwarding client recomputes for the upstream request.
-const HOP_HEADERS: [&str; 10] = [
-    "connection",
-    "keep-alive",
-    "proxy-authenticate",
-    "proxy-authorization",
-    "proxy-connection",
-    "te",
-    "trailer",
-    "transfer-encoding",
-    "upgrade",
-    "host",
-];
-
-/// The prompt that caused a request: its session and the Host's turn generation.
-#[derive(Clone, Debug, PartialEq, Eq)]
-pub(crate) struct CallOwner {
-    pub(crate) session: String,
-    pub(crate) generation: u64,
-}
-
-/// Called once per completed or abandoned generation request with the
-/// session that had the only running prompt when the request started, and
-/// whether that prompt's `turnFinished` was already emitted.
-pub(crate) type CallSink = Arc<dyn Fn(Option<String>, bool, ModelCall) + Send + Sync>;
-/// Resolves the prompt a new request belongs to, or `None` when ambiguous.
-pub(crate) type SessionResolver = Arc<dyn Fn() -> Option<CallOwner> + Send + Sync>;
-
-/// Attributed generation requests that have started but not yet been reported.
-/// The Host waits on it so a turn's `modelCall` events precede `turnFinished`.
-#[derive(Default)]
-pub(crate) struct CallsInFlight {
-    counts: Mutex<HashMap<String, usize>>,
-    changed: tokio::sync::Notify,
-    /// Latest generation per session whose `turnFinished` has been emitted.
-    finished: Mutex<HashMap<String, u64>>,
-}
-
-impl CallsInFlight {
-    /// Record that `generation`'s turn ended. Later reports for it, from a
-    /// stream that outlived the settle bound, must not count toward the next turn.
-    pub(crate) fn finish_turn(&self, session: &str, generation: u64) {
-        if let Ok(mut finished) = self.finished.lock() {
-            let latest = finished.entry(session.to_owned()).or_default();
-            *latest = (*latest).max(generation);
-        }
-    }
-
-    fn after_turn(&self, owner: &CallOwner) -> bool {
-        self.finished.lock().is_ok_and(|finished| {
-            finished
-                .get(&owner.session)
-                .is_some_and(|latest| *latest >= owner.generation)
-        })
-    }
-
-    fn begin(&self, session: &str) {
-        if let Ok(mut counts) = self.counts.lock() {
-            *counts.entry(session.to_owned()).or_default() += 1;
-        }
-    }
-
-    fn end(&self, session: &str) {
-        if let Ok(mut counts) = self.counts.lock() {
-            if let Some(count) = counts.get_mut(session) {
-                *count -= 1;
-                if *count == 0 {
-                    counts.remove(session);
-                }
-            }
-        }
-        self.changed.notify_waiters();
-    }
-
-    fn pending(&self, session: &str) -> bool {
-        self.counts
-            .lock()
-            .is_ok_and(|counts| counts.contains_key(session))
-    }
-
-    /// Wait until `session` has no unreported call, at most `limit`. A stream
-    /// the Agent keeps open past its prompt response cannot delay the turn
-    /// beyond this bound; its call is then reported for the session only.
-    pub(crate) async fn settle(&self, session: &str, limit: Duration) {
-        // log-exempt: 用户取消：prompt 调用方只等待本轮宽限期，超时后不再等待，尚未结束的模型调用仍由会话报告。
-        let _ = tokio::time::timeout(limit, async {
-            loop {
-                // Registered before the check so a concurrent `end` is not missed.
-                let changed = self.changed.notified();
-                if !self.pending(session) {
-                    return;
-                }
-                changed.await;
-            }
-        })
-        .await;
-    }
-}
-
-/// A running proxy. Dropping it stops accepting connections and aborts
-/// in-flight exchanges together with the Agent connection that used them.
-pub(crate) struct ModelCallProxy {
-    base_url: String,
-    accept: tokio::task::JoinHandle<()>,
-    connections: Arc<Mutex<tokio::task::JoinSet<()>>>,
-}
-
-impl ModelCallProxy {
-    /// Base URL to hand to the Agent in place of the configured endpoint.
-    pub(crate) fn base_url(&self) -> &str {
-        &self.base_url
-    }
-}
-
-impl Drop for ModelCallProxy {
-    fn drop(&mut self) {
-        self.accept.abort();
-        if let Ok(mut connections) = self.connections.lock() {
-            connections.abort_all();
-        }
-    }
-}
-
-struct State {
-    /// Path prefix the Agent must use, e.g. `/lithe-<uuid>`.
-    prefix: String,
-    /// Configured endpoint without a trailing slash.
-    upstream: String,
-    /// Scheme, host and port of the configured endpoint.
-    origin: url::Url,
-    /// Path of the configured endpoint without a trailing slash, e.g. `/api`.
-    base_path: String,
-    client: reqwest::Client,
-    session: SessionResolver,
-    sink: CallSink,
-    in_flight: Arc<CallsInFlight>,
-    /// Upgraded sockets outlive their HTTP exchange but share its launch owner.
-    connections: std::sync::Weak<Mutex<tokio::task::JoinSet<()>>>,
-}
-
-impl State {
-    fn report(&self, owner: Option<CallOwner>, call: ModelCall) {
-        let after_turn = owner
-            .as_ref()
-            .is_some_and(|owner| self.in_flight.after_turn(owner));
-        (self.sink)(
-            owner.as_ref().map(|owner| owner.session.clone()),
-            after_turn,
-            call,
-        );
-        self.release(owner.as_ref());
-    }
-
-    /// End an attributed request without reporting it, e.g. a redirect hop.
-    fn release(&self, owner: Option<&CallOwner>) {
-        if let Some(owner) = owner {
-            self.in_flight.end(&owner.session);
-        }
-    }
-
-    /// Map a same-origin redirect target back onto this proxy. The Agent
-    /// resolves `Location` against the proxy URL, whose path differs from the
-    /// upstream request by the token prefix, so absolute paths and `../`
-    /// references would escape the proxy route. Resolve against the actual
-    /// upstream request URL, then remap. Cross-origin targets are left for
-    /// the Agent's own client and credential policy, exactly as without the proxy.
-    fn rewrite_location(&self, location: &str, request: &url::Url) -> Option<String> {
-        let target = request.join(location).ok()?;
-        if target.origin() != self.origin.origin() {
-            return None;
-        }
-        let mut rest = target.path().to_owned();
-        if let Some(query) = target.query() {
-            rest.push('?');
-            rest.push_str(query);
-        }
-        if let Some(fragment) = target.fragment() {
-            rest.push('#');
-            rest.push_str(fragment);
-        }
-        let under_base = self.base_path.is_empty()
-            || target.path() == self.base_path
-            || target.path().starts_with(&format!("{}/", self.base_path));
-        Some(if under_base {
-            format!("{}{}", self.prefix, &rest[self.base_path.len()..])
-        } else {
-            format!("{}{ORIGIN_ROUTE}{rest}", self.prefix)
-        })
-    }
-}
-
-/// Bind an ephemeral loopback port and forward to `upstream`.
-pub(crate) async fn start(
-    upstream: &str,
-    session: SessionResolver,
-    sink: CallSink,
-    in_flight: Arc<CallsInFlight>,
-) -> Result<ModelCallProxy, String> {
-    let upstream = upstream.trim_end_matches('/');
-    let mut origin = url::Url::parse(upstream)
-        .map_err(|error| format!("Could not prepare model call statistics: {error}"))?;
-    let base_path = origin.path().trim_end_matches('/').to_owned();
-    origin.set_path("/");
-    origin.set_query(None);
-    let client = reqwest::Client::builder()
-        .connect_timeout(CONNECT_TIMEOUT)
-        // Redirects and compression are the Agent's concern; forward them as-is.
-        .redirect(reqwest::redirect::Policy::none())
-        .build()
-        .map_err(|error| format!("Could not prepare model call statistics: {error}"))?;
-    let listener = tokio::net::TcpListener::bind(("127.0.0.1", 0))
-        .await
-        .map_err(|error| format!("Could not start model call statistics: {error}"))?;
-    let port = listener
-        .local_addr()
-        .map_err(|error| format!("Could not start model call statistics: {error}"))?
-        .port();
-    let prefix = format!("/lithe-{}", uuid::Uuid::new_v4().simple());
-    let connections = Arc::new(Mutex::new(tokio::task::JoinSet::new()));
-    let state = Arc::new(State {
-        prefix: prefix.clone(),
-        upstream: upstream.to_owned(),
-        origin,
-        base_path,
-        client,
-        session,
-        sink,
-        in_flight,
-        connections: Arc::downgrade(&connections),
-    });
-    let accepted = connections.clone();
-    let accept = tokio::spawn(async move {
-        loop {
-            let Ok((stream, _)) = listener.accept().await else {
-                continue;
-            };
-            let state = state.clone();
-            let service = hyper::service::service_fn(move |request| handle(request, state.clone()));
-            let connection = async move {
-                crate::failure_log::connection(
-                    "agent.host.operation_failed",
-                    "proxy_connection",
-                    hyper::server::conn::http1::Builder::new()
-                        .serve_connection(hyper_util::rt::TokioIo::new(stream), service)
-                        .with_upgrades()
-                        .await,
-                );
-            };
-            if let Ok(mut connections) = accepted.lock() {
-                // Reap finished exchanges so a long session does not accumulate handles.
-                while connections.try_join_next().is_some() {}
-                connections.spawn(connection);
-            }
-        }
-    });
-    Ok(ModelCallProxy {
-        base_url: format!("http://127.0.0.1:{port}{prefix}"),
-        accept,
-        connections,
-    })
-}
-
-type ProxyBody = UnsyncBoxBody<Bytes, Box<dyn std::error::Error + Send + Sync>>;
-
-async fn handle(
-    request: Request<Incoming>,
-    state: Arc<State>,
-) -> Result<Response<ProxyBody>, Infallible> {
-    let path = request
-        .uri()
-        .path_and_query()
-        .map(|value| value.as_str())
-        .unwrap_or("/");
-    let Some(rest) = path
-        .strip_prefix(&state.prefix)
-        .filter(|rest| rest.is_empty() || rest.starts_with(['/', '?']))
-    else {
-        return Ok(failure(StatusCode::NOT_FOUND, "Unknown model call route"));
-    };
-    // Same-origin redirects outside the configured path use the origin route.
-    let (url, route) = match rest.strip_prefix(ORIGIN_ROUTE) {
-        Some(path) if path.is_empty() || path.starts_with(['/', '?']) => (
-            format!("{}{path}", state.origin.as_str().trim_end_matches('/')),
-            path,
-        ),
-        _ => (format!("{}{rest}", state.upstream), rest),
-    };
-    if websocket::is_upgrade(&request) {
-        let observed = ModelApi::from_path(route) == Some(ModelApi::Responses);
-        return Ok(websocket::forward(request, &url, state, observed).await);
-    }
-    let api = (request.method() == hyper::Method::POST)
-        .then(|| ModelApi::from_path(route))
-        .flatten();
-    let compressed_request = request
-        .headers()
-        .contains_key(hyper::header::CONTENT_ENCODING);
-    let headers = forwarded_headers(request.headers(), api.is_some());
-    let (parts, body) = request.into_parts();
-    let mut body = body.into_data_stream();
-    let mut shape = None;
-    let body = match api {
-        // Auxiliary and upload requests stream through without buffering.
-        None => reqwest::Body::wrap_stream(body),
-        Some(api) => {
-            let mut buffered = Vec::new();
-            let mut size = 0;
-            let mut complete = true;
-            while let Some(chunk) = body.next().await {
-                let Ok(chunk) = chunk else {
-                    return Ok(failure(
-                        StatusCode::BAD_REQUEST,
-                        "The model request was interrupted",
-                    ));
-                };
-                size += chunk.len();
-                buffered.push(chunk);
-                if size > OBSERVED_REQUEST_BYTES {
-                    complete = false;
-                    break;
-                }
-            }
-            if complete {
-                let bytes = Bytes::from(buffered.concat());
-                if !compressed_request {
-                    shape = model_calls::request_shape(api, &bytes);
-                }
-                reqwest::Body::from(bytes)
-            } else {
-                // Over the observation budget: forward unchanged without composition.
-                reqwest::Body::wrap_stream(
-                    futures::stream::iter(buffered.into_iter().map(Ok)).chain(body),
-                )
-            }
-        }
-    };
-    let session = api.and_then(|_| (state.session)());
-    if let Some(owner) = &session {
-        state.in_flight.begin(&owner.session);
-    }
-    let request_url = url::Url::parse(&url).ok();
-    let started = Instant::now();
-    let upstream = state
-        .client
-        .request(parts.method, &url)
-        .headers(headers)
-        .body(body)
-        .send()
-        .await;
-    let upstream = match upstream {
-        Ok(response) => response,
-        Err(error) => {
-            if let Some(api) = api {
-                let observer =
-                    ResponseObserver::new(api, StatusCode::BAD_GATEWAY.as_u16(), false, started);
-                state.report(session, observer.finish(shape.as_ref(), Instant::now()));
-            }
-            // reqwest errors carry the URL and cause, never request headers.
-            return Ok(failure(
-                StatusCode::BAD_GATEWAY,
-                &format!("Lithe could not reach the model provider: {error}"),
-            ));
-        }
-    };
-    let status = upstream.status();
-    // A redirect is a transport hop, not a generation; only the final
-    // response of the followed request is a model call.
-    let api = if status.is_redirection() {
-        state.release(session.as_ref());
-        None
-    } else {
-        api
-    };
-    let mut response = Response::builder().status(status);
-    let streaming = upstream
-        .headers()
-        .get(hyper::header::CONTENT_TYPE)
-        .and_then(|value| value.to_str().ok())
-        .is_some_and(|value| value.starts_with("text/event-stream"));
-    if let Some(headers) = response.headers_mut() {
-        for (name, value) in upstream.headers() {
-            if is_hop_header(name) {
-                continue;
-            }
-            let rewritten = (name == hyper::header::LOCATION)
-                .then(|| {
-                    value.to_str().ok().and_then(|location| {
-                        state.rewrite_location(location, request_url.as_ref()?)
-                    })
-                })
-                .flatten()
-                .and_then(|location| HeaderValue::from_str(&location).ok());
-            headers.append(name.clone(), rewritten.unwrap_or_else(|| value.clone()));
-        }
-    }
-    let stream = upstream.bytes_stream();
-    let body: ProxyBody = match api {
-        Some(api) => {
-            let observed = ObservedStream {
-                inner: stream.boxed(),
-                observer: Some(ResponseObserver::new(
-                    api,
-                    status.as_u16(),
-                    streaming,
-                    started,
-                )),
-                shape,
-                session,
-                state: state.clone(),
-            };
-            BodyExt::boxed_unsync(StreamBody::new(
-                observed.map(|chunk| chunk.map(Frame::data)),
-            ))
-        }
-        None => BodyExt::boxed_unsync(StreamBody::new(stream.map(|chunk| {
-            chunk
-                .map(Frame::data)
-                .map_err(|error| Box::new(error) as Box<dyn std::error::Error + Send + Sync>)
-        }))),
-    };
-    Ok(response.body(body).unwrap_or_else(|_| {
-        failure(
-            StatusCode::BAD_GATEWAY,
-            "Lithe could not forward the model response",
-        )
-    }))
-}
-
-/// Copy the Agent's headers. For observed calls, ask for an identity-encoded
-/// response so usage events remain readable; the content is unchanged.
-fn forwarded_headers(source: &HeaderMap, observed: bool) -> HeaderMap {
-    let mut headers = HeaderMap::with_capacity(source.len());
-    for (name, value) in source {
-        if !is_hop_header(name) && name != hyper::header::CONTENT_LENGTH {
-            headers.append(name.clone(), value.clone());
-        }
-    }
-    if observed {
-        headers.insert(
-            hyper::header::ACCEPT_ENCODING,
-            HeaderValue::from_static("identity"),
-        );
-    }
-    headers
-}
-
-fn is_hop_header(name: &HeaderName) -> bool {
-    HOP_HEADERS.contains(&name.as_str())
-}
-
-fn failure(status: StatusCode, message: &str) -> Response<ProxyBody> {
-    // Use the provider error envelope shape both Anthropic and OpenAI clients read.
-    let body = serde_json::json!({"error": {"type": "api_error", "message": message}}).to_string();
-    let mut response = Response::new(BodyExt::boxed_unsync(
-        Full::new(Bytes::from(body)).map_err(|never| match never {}),
-    ));
-    *response.status_mut() = status;
-    response.headers_mut().insert(
-        hyper::header::CONTENT_TYPE,
-        HeaderValue::from_static("application/json"),
-    );
-    response
-}
-
-/// Forwards upstream chunks unchanged while feeding the observer. The call is
-/// reported at end of stream, upstream error, or when the Agent disconnects.
-struct ObservedStream {
-    inner: futures::stream::BoxStream<'static, reqwest::Result<Bytes>>,
-    observer: Option<ResponseObserver>,
-    shape: Option<RequestShape>,
-    session: Option<CallOwner>,
-    state: Arc<State>,
-}
-
-impl ObservedStream {
-    fn report(&mut self) {
-        if let Some(observer) = self.observer.take() {
-            let call = observer.finish(self.shape.as_ref(), Instant::now());
-            self.state.report(self.session.take(), call);
-        }
-    }
-}
-
-impl Stream for ObservedStream {
-    type Item = Result<Bytes, Box<dyn std::error::Error + Send + Sync>>;
-
-    fn poll_next(mut self: Pin<&mut Self>, context: &mut Context<'_>) -> Poll<Option<Self::Item>> {
-        match self.inner.poll_next_unpin(context) {
-            Poll::Ready(Some(Ok(chunk))) => {
-                if let Some(observer) = self.observer.as_mut() {
-                    observer.feed(&chunk, Instant::now());
-                }
-                Poll::Ready(Some(Ok(chunk)))
-            }
-            Poll::Ready(Some(Err(error))) => {
-                self.report();
-                Poll::Ready(Some(Err(Box::new(error))))
-            }
-            Poll::Ready(None) => {
-                self.report();
-                Poll::Ready(None)
-            }
-            Poll::Pending => Poll::Pending,
-        }
-    }
-}
-
-impl Drop for ObservedStream {
-    fn drop(&mut self) {
-        self.report();
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use tokio::io::{AsyncReadExt, AsyncWriteExt};
-
-    /// Minimal HTTP/1.1 upstream that records one request and replies with `reply`.
-    async fn upstream(reply: &'static str) -> (String, tokio::task::JoinHandle<String>) {
-        let listener = tokio::net::TcpListener::bind(("127.0.0.1", 0))
-            .await
-            .unwrap();
-        let address = listener.local_addr().unwrap();
-        let task = tokio::spawn(async move {
-            let (mut stream, _) = listener.accept().await.unwrap();
-            let mut received = Vec::new();
-            let mut buffer = [0u8; 4096];
-            // Read headers, then the declared body length.
-            loop {
-                let read = stream.read(&mut buffer).await.unwrap();
-                received.extend_from_slice(&buffer[..read]);
-                let text = String::from_utf8_lossy(&received).to_string();
-                if let Some(end) = text.find("\r\n\r\n") {
-                    let length = text[..end]
-                        .lines()
-                        .find_map(|line| {
-                            line.to_ascii_lowercase()
-                                .strip_prefix("content-length:")
-                                .map(|value| value.trim().parse::<usize>().unwrap())
-                        })
-                        .unwrap_or(0);
-                    if received.len() >= end + 4 + length || read == 0 {
-                        break;
-                    }
-                }
-            }
-            stream.write_all(reply.as_bytes()).await.unwrap();
-            stream.shutdown().await.unwrap();
-            String::from_utf8_lossy(&received).to_string()
-        });
-        (format!("http://{address}/api"), task)
-    }
-
-    async fn send(base: &str, path: &str, body: &str) -> (u16, String) {
-        let client = reqwest::Client::new();
-        let response = client
-            .post(format!("{base}{path}"))
-            .header("x-api-key", "secret-key")
-            .header("content-type", "application/json")
-            .body(body.to_owned())
-            .send()
-            .await
-            .unwrap();
-        (response.status().as_u16(), response.text().await.unwrap())
-    }
-
-    fn owner() -> Option<CallOwner> {
-        Some(CallOwner {
-            session: "session-1".into(),
-            generation: 1,
-        })
-    }
-
-    /// Calls reported by the proxy, in completion order.
-    type Collected = Arc<Mutex<Vec<(Option<String>, ModelCall)>>>;
-
-    fn collecting() -> (CallSink, Collected) {
-        let calls = Arc::new(Mutex::new(Vec::new()));
-        let sink = calls.clone();
-        (
-            Arc::new(move |session, _, call| sink.lock().unwrap().push((session, call))),
-            calls,
-        )
-    }
-
-    #[tokio::test]
-    async fn streams_are_forwarded_unchanged_and_observed() {
-        let stream = "data: {\"type\":\"message_start\",\"message\":{\"usage\":{\"input_tokens\":5,\"output_tokens\":1}}}\n\ndata: {\"type\":\"content_block_delta\"}\n\ndata: {\"type\":\"message_delta\",\"usage\":{\"output_tokens\":9}}\n\n";
-        let reply: &'static str = Box::leak(format!(
-            "HTTP/1.1 200 OK\r\ncontent-type: text/event-stream\r\nretry-after: 7\r\ncontent-length: {}\r\n\r\n{stream}",
-            stream.len()
-        ).into_boxed_str());
-        let (base, request) = upstream(reply).await;
-        let (sink, calls) = collecting();
-        let in_flight = Arc::new(CallsInFlight::default());
-        let proxy = start(&base, Arc::new(owner), sink, in_flight.clone())
-            .await
-            .unwrap();
-        let (status, body) = send(
-            proxy.base_url(),
-            "/v1/messages",
-            r#"{"model":"m","messages":[]}"#,
-        )
-        .await;
-        assert_eq!((status, body.as_str()), (200, stream));
-        let request = request.await.unwrap();
-        // The Agent's credentials and body reach the configured path unchanged.
-        assert!(request.starts_with("POST /api/v1/messages HTTP/1.1"));
-        assert!(request
-            .to_ascii_lowercase()
-            .contains("x-api-key: secret-key"));
-        assert!(request.ends_with(r#"{"model":"m","messages":[]}"#));
-        drop(proxy);
-        let calls = calls.lock().unwrap();
-        assert_eq!(calls.len(), 1);
-        let (session, call) = &calls[0];
-        assert_eq!(session.as_deref(), Some("session-1"));
-        assert!(
-            !in_flight.pending("session-1"),
-            "reported calls are no longer in flight"
-        );
-        assert!(call.streaming);
-        assert_eq!(call.model.as_deref(), Some("m"));
-        assert_eq!(call.usage.map(|usage| usage.output_tokens), Some(9));
-    }
-
-    #[tokio::test]
-    async fn auxiliary_requests_and_foreign_paths_are_not_observed() {
-        let (base, request) =
-            upstream("HTTP/1.1 404 Not Found\r\ncontent-length: 2\r\n\r\n{}").await;
-        let (sink, calls) = collecting();
-        let proxy = start(&base, Arc::new(|| None), sink, Arc::default())
-            .await
-            .unwrap();
-        let (status, _) = send(proxy.base_url(), "/v1/messages/count_tokens", "{}").await;
-        assert_eq!(status, 404);
-        request.await.unwrap();
-        // Without the per-launch token another local process cannot use the route.
-        let origin = proxy.base_url().rsplit_once('/').unwrap().0.to_owned();
-        let (status, body) = send(&origin, "/v1/messages", "{}").await;
-        assert_eq!(status, 404);
-        assert!(body.contains("Unknown model call route"));
-        assert!(calls.lock().unwrap().is_empty());
-    }
-
-    #[tokio::test]
-    async fn unreachable_providers_return_an_error_envelope_and_a_failed_call() {
-        let listener = tokio::net::TcpListener::bind(("127.0.0.1", 0))
-            .await
-            .unwrap();
-        let closed = format!("http://{}", listener.local_addr().unwrap());
-        drop(listener);
-        let (sink, calls) = collecting();
-        let proxy = start(&closed, Arc::new(|| None), sink, Arc::default())
-            .await
-            .unwrap();
-        let (status, body) = send(proxy.base_url(), "/v1/responses", "{}").await;
-        assert_eq!(status, 502);
-        assert!(body.contains("\"api_error\""));
-        assert!(!body.contains("secret-key"));
-        assert_eq!(calls.lock().unwrap()[0].1.status, 502);
-    }
-
-    /// `(status, headers, body)` returned for one upstream request.
-    type ScriptedReply = (u16, Vec<(&'static str, &'static str)>, &'static str);
-
-    /// Recorded `(path, body length)` of each request a hyper upstream served.
-    type Served = Arc<Mutex<Vec<(String, usize)>>>;
-
-    /// HTTP/1.1 upstream that drains each request body, including chunked
-    /// uploads, and answers with the next scripted `(status, headers, body)`.
-    async fn scripted_upstream(replies: Vec<ScriptedReply>) -> (String, Served) {
-        let listener = tokio::net::TcpListener::bind(("127.0.0.1", 0))
-            .await
-            .unwrap();
-        let address = listener.local_addr().unwrap();
-        let served: Served = Arc::default();
-        let log = served.clone();
-        let replies = Arc::new(Mutex::new(std::collections::VecDeque::from(replies)));
-        tokio::spawn(async move {
-            while let Ok((stream, _)) = listener.accept().await {
-                let (log, replies) = (log.clone(), replies.clone());
-                tokio::spawn(async move {
-                    let service = hyper::service::service_fn(move |request: Request<Incoming>| {
-                        let (log, replies) = (log.clone(), replies.clone());
-                        async move {
-                            let path = request
-                                .uri()
-                                .path_and_query()
-                                .map(|value| value.to_string())
-                                .unwrap_or_default();
-                            let length = request
-                                .into_body()
-                                .collect()
-                                .await
-                                .map(|body| body.to_bytes().len())
-                                .unwrap_or(0);
-                            log.lock().unwrap().push((path, length));
-                            let (status, headers, body) = replies
-                                .lock()
-                                .unwrap()
-                                .pop_front()
-                                .unwrap_or((200, vec![], ""));
-                            let mut response =
-                                Response::new(Full::new(Bytes::from_static(body.as_bytes())));
-                            *response.status_mut() = StatusCode::from_u16(status).unwrap();
-                            for (name, value) in headers {
-                                response
-                                    .headers_mut()
-                                    .insert(name, HeaderValue::from_static(value));
-                            }
-                            Ok::<_, Infallible>(response)
-                        }
-                    });
-                    let _ = hyper::server::conn::http1::Builder::new()
-                        .serve_connection(hyper_util::rt::TokioIo::new(stream), service)
-                        .await;
-                });
-            }
-        });
-        (format!("http://{address}/api"), served)
-    }
-
-    #[tokio::test]
-    async fn same_origin_redirects_are_mapped_back_onto_the_proxy() {
-        let (base, _) = scripted_upstream(vec![]).await;
-        let proxy = start(
-            &format!("{base}/v1"),
-            Arc::new(|| None),
-            collecting().0,
-            Arc::default(),
-        )
-        .await
-        .unwrap();
-        let prefix = proxy
-            .base_url()
-            .split_once("/lithe-")
-            .map(|(_, token)| format!("/lithe-{token}"))
-            .unwrap();
-        let origin = base.trim_end_matches("/api");
-        let state = State {
-            prefix: prefix.clone(),
-            upstream: format!("{base}/v1"),
-            origin: url::Url::parse(&format!("{origin}/")).unwrap(),
-            base_path: "/api/v1".into(),
-            client: reqwest::Client::new(),
-            session: Arc::new(|| None),
-            sink: collecting().0,
-            in_flight: Arc::default(),
-            connections: std::sync::Weak::new(),
-        };
-        // Locations resolve against the actual upstream request, not the proxy URL.
-        let request = url::Url::parse(&format!("{origin}/api/v1/messages")).unwrap();
-        let rewrite = |location: &str| state.rewrite_location(location, &request);
-        assert_eq!(
-            rewrite("/api/v1/messages?beta=1").unwrap(),
-            format!("{prefix}/messages?beta=1")
-        );
-        assert_eq!(
-            rewrite(&format!("{origin}/api/v1/responses")).unwrap(),
-            format!("{prefix}/responses")
-        );
-        assert_eq!(
-            rewrite("/v2/responses").unwrap(),
-            format!("{prefix}/~origin/v2/responses")
-        );
-        // A path that only shares a textual prefix with the base is outside it.
-        assert_eq!(
-            rewrite("/api/v10/x").unwrap(),
-            format!("{prefix}/~origin/api/v10/x")
-        );
-        // Relative references, including `../` that leave the configured path.
-        assert_eq!(rewrite("responses").unwrap(), format!("{prefix}/responses"));
-        assert_eq!(
-            rewrite("../v2/messages?x=1").unwrap(),
-            format!("{prefix}/~origin/api/v2/messages?x=1")
-        );
-        assert_eq!(
-            rewrite("../../v2/messages").unwrap(),
-            format!("{prefix}/~origin/v2/messages")
-        );
-        assert_eq!(
-            rewrite("./v1/../responses").unwrap(),
-            format!("{prefix}/responses")
-        );
-        // Cross-origin targets are left to the Agent's own client.
-        assert_eq!(rewrite("https://other.example/v1/messages"), None);
-    }
-
-    #[tokio::test]
-    async fn relative_redirects_keep_working_through_the_proxy() {
-        let stream = "data: {\"type\":\"message_start\",\"message\":{\"usage\":{\"input_tokens\":1,\"output_tokens\":1}}}\n\n";
-        let (base, served) = scripted_upstream(vec![
-            (307, vec![("location", "/v2/messages")], ""),
-            (200, vec![("content-type", "text/event-stream")], stream),
-        ])
-        .await;
-        let (sink, calls) = collecting();
-        let in_flight = Arc::new(CallsInFlight::default());
-        let proxy = start(&base, Arc::new(owner), sink, in_flight.clone())
-            .await
-            .unwrap();
-        // reqwest follows a 307 like the Agents' HTTP clients, resending the body.
-        let (status, body) = send(proxy.base_url(), "/v1/messages", r#"{"messages":[]}"#).await;
-        assert_eq!((status, body.as_str()), (200, stream));
-        let served = served.lock().unwrap().clone();
-        assert_eq!(
-            served
-                .iter()
-                .map(|(path, _)| path.as_str())
-                .collect::<Vec<_>>(),
-            ["/api/v1/messages", "/v2/messages"]
-        );
-        // The released redirect hop does not leave the turn waiting.
-        assert!(!in_flight.pending("session-1"));
-        drop(proxy);
-        // The 307 hop is transport, not a generation: exactly one model call.
-        let calls = calls.lock().unwrap();
-        assert_eq!(calls.len(), 1, "{calls:?}");
-        assert!(calls[0].1.streaming && calls[0].1.usage.is_some());
-    }
-
-    #[tokio::test]
-    async fn large_requests_stream_through_instead_of_failing() {
-        let (base, served) =
-            scripted_upstream(vec![(200, vec![], "{}"), (200, vec![], "{}")]).await;
-        let (sink, calls) = collecting();
-        let proxy = start(&base, Arc::new(|| None), sink, Arc::default())
-            .await
-            .unwrap();
-        let large = "x".repeat(OBSERVED_REQUEST_BYTES + 1024);
-        // An unobserved upload and an observed request over the measuring budget.
-        for path in ["/v1/files", "/v1/messages"] {
-            let (status, _) = send(proxy.base_url(), path, &large).await;
-            assert_eq!(status, 200, "{path}");
-        }
-        assert!(served
-            .lock()
-            .unwrap()
-            .iter()
-            .all(|(_, length)| *length == large.len()));
-        drop(proxy);
-        let calls = calls.lock().unwrap();
-        assert_eq!(calls.len(), 1, "only the generation endpoint is observed");
-        assert!(
-            calls[0].1.context.is_none(),
-            "composition is skipped over budget"
-        );
-    }
-
-    #[tokio::test(start_paused = true)]
-    async fn settling_waits_for_reported_calls_within_a_bound() {
-        let in_flight = Arc::new(CallsInFlight::default());
-        let started = tokio::time::Instant::now();
-        in_flight.settle("idle", Duration::from_secs(2)).await;
-        assert_eq!(
-            started.elapsed(),
-            Duration::ZERO,
-            "no attributed call means no wait"
-        );
-        in_flight.begin("session-1");
-        let reporting = in_flight.clone();
-        tokio::spawn(async move {
-            tokio::time::sleep(Duration::from_millis(300)).await;
-            reporting.end("session-1");
-        });
-        in_flight.settle("session-1", Duration::from_secs(2)).await;
-        assert_eq!(started.elapsed(), Duration::from_millis(300));
-        // A stream left open cannot hold the turn beyond the bound.
-        in_flight.begin("session-2");
-        let bounded = tokio::time::Instant::now();
-        in_flight.settle("session-2", Duration::from_secs(2)).await;
-        assert_eq!(bounded.elapsed(), Duration::from_secs(2));
-        // After the turn ends its late call is marked; the next turn's is not.
-        let late = CallOwner {
-            session: "session-2".into(),
-            generation: 4,
-        };
-        let next = CallOwner {
-            session: "session-2".into(),
-            generation: 7,
-        };
-        assert!(!in_flight.after_turn(&late));
-        in_flight.finish_turn("session-2", 4);
-        assert!(in_flight.after_turn(&late));
-        assert!(!in_flight.after_turn(&next));
-    }
-}
diff --git a/rust/lithe-agent-host/src/model_proxy/websocket.rs b/rust/lithe-agent-host/src/model_proxy/websocket.rs
deleted file mode 100644
index 1adae3b8..00000000
--- a/rust/lithe-agent-host/src/model_proxy/websocket.rs
+++ /dev/null
@@ -1,559 +0,0 @@
-//! Transparent WebSocket forwarding with bounded, passive frame observation.
-//!
-//! Hyper/reqwest own the upgraded transport and tungstenite owns frame parsing.
-//! Original frames, compression, ping/pong, close messages and headers pass
-//! unchanged. Malformed or oversized observations disable only statistics.
-//! Only section sizes and one response identifier survive a decoded message.
-
-use std::collections::{BTreeMap, VecDeque};
-use std::io::{self, Read};
-use std::pin::Pin;
-use std::sync::{Arc, Mutex};
-use std::task::{Context, Poll};
-use std::time::Instant;
-
-use bytes::Bytes;
-use flate2::{Decompress, FlushDecompress};
-use http_body_util::{BodyExt, Full, StreamBody};
-use hyper::body::{Frame as HttpFrame, Incoming};
-use hyper::{Request, Response, StatusCode};
-use serde_json::Value;
-use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
-use tungstenite::protocol::frame::coding::{Data, OpCode};
-use tungstenite::protocol::frame::FrameSocket;
-
-use super::{failure, is_hop_header, ProxyBody, State, CONNECT_TIMEOUT, OBSERVED_REQUEST_BYTES};
-use crate::model_calls::{self, ModelApi, RequestShape, ResponseObserver};
-
-/// Output indexes are retained as sizes, never as response bodies.
-const MAX_OUTPUT_ITEMS: usize = 1024;
-const MAX_RESPONSE_ID_BYTES: usize = 256;
-
-pub(super) fn is_upgrade(request: &Request<Incoming>) -> bool {
-    request.method() == hyper::Method::GET
-        && request
-            .headers()
-            .get(hyper::header::UPGRADE)
-            .and_then(|value| value.to_str().ok())
-            .is_some_and(|value| value.eq_ignore_ascii_case("websocket"))
-}
-
-pub(super) async fn forward(
-    mut request: Request<Incoming>,
-    url: &str,
-    state: Arc<State>,
-    observed: bool,
-) -> Response<ProxyBody> {
-    let mut headers = super::forwarded_headers(request.headers(), false);
-    headers.insert(
-        hyper::header::CONNECTION,
-        hyper::header::HeaderValue::from_static("Upgrade"),
-    );
-    headers.insert(
-        hyper::header::UPGRADE,
-        hyper::header::HeaderValue::from_static("websocket"),
-    );
-    let upstream = tokio::time::timeout(
-        CONNECT_TIMEOUT,
-        state.client.get(url).headers(headers).send(),
-    )
-    .await;
-    let Ok(Ok(upstream)) = upstream else {
-        return failure(
-            StatusCode::BAD_GATEWAY,
-            "Could not connect to the model WebSocket",
-        );
-    };
-    let status = upstream.status();
-    let mut response = Response::builder().status(status);
-    if let Some(headers) = response.headers_mut() {
-        for (name, value) in upstream.headers() {
-            if !is_hop_header(name) {
-                let rewritten = (name == hyper::header::LOCATION)
-                    .then(|| {
-                        value.to_str().ok().and_then(|location| {
-                            state.rewrite_location(location, &url::Url::parse(url).ok()?)
-                        })
-                    })
-                    .flatten()
-                    .and_then(|location| hyper::header::HeaderValue::from_str(&location).ok());
-                headers.append(name.clone(), rewritten.unwrap_or_else(|| value.clone()));
-            }
-        }
-    }
-    if status != StatusCode::SWITCHING_PROTOCOLS {
-        // Native Codex still receives auth failures, redirects and rate limits
-        // with their original bodies, so it owns refresh and retry decisions.
-        let body = upstream.bytes_stream();
-        return response
-            .body(BodyExt::boxed_unsync(StreamBody::new(
-                futures::StreamExt::map(body, |chunk| {
-                    chunk.map(HttpFrame::data).map_err(|error| {
-                        Box::new(error) as Box<dyn std::error::Error + Send + Sync>
-                    })
-                }),
-            )))
-            .unwrap_or_else(|_| {
-                failure(
-                    StatusCode::BAD_GATEWAY,
-                    "Could not forward the WebSocket response",
-                )
-            });
-    }
-    if let Some(headers) = response.headers_mut() {
-        headers.insert(
-            hyper::header::CONNECTION,
-            hyper::header::HeaderValue::from_static("Upgrade"),
-        );
-        headers.insert(
-            hyper::header::UPGRADE,
-            hyper::header::HeaderValue::from_static("websocket"),
-        );
-    }
-    let extensions = upstream
-        .headers()
-        .get("sec-websocket-extensions")
-        .and_then(|value| value.to_str().ok())
-        .unwrap_or_default()
-        .to_owned();
-    let downstream = hyper::upgrade::on(&mut request);
-    let connections = state.connections.upgrade();
-    if let Some(connections) = connections {
-        if let Ok(mut connections) = connections.lock() {
-            while connections.try_join_next().is_some() {}
-            connections.spawn(async move {
-                let Ok(Ok((downstream, upstream))) = tokio::time::timeout(CONNECT_TIMEOUT, async {
-                    tokio::try_join!(async { downstream.await.map_err(|_| ()) }, async {
-                        upstream.upgrade().await.map_err(|_| ())
-                    })
-                })
-                .await
-                else {
-                    return;
-                };
-                let mut observation = Observation::new(state, &extensions);
-                if !observed {
-                    observation.disable(Instant::now());
-                }
-                let observation = Arc::new(Mutex::new(observation));
-                let mut downstream = ObservedIo {
-                    inner: hyper_util::rt::TokioIo::new(downstream),
-                    from_client: true,
-                    observation: observation.clone(),
-                };
-                let mut upstream = ObservedIo {
-                    inner: upstream,
-                    from_client: false,
-                    observation,
-                };
-                // No model-turn deadline. The connection owner aborts this
-                // task on shutdown; copy_bidirectional preserves half-closes.
-                crate::failure_log::teardown(
-                    "agent.host.operation_failed",
-                    "websocket_copy",
-                    tokio::io::copy_bidirectional(&mut downstream, &mut upstream).await,
-                );
-            });
-        }
-    }
-    response
-        .body(
-            Full::new(Bytes::new())
-                .map_err(|never| match never {})
-                .boxed_unsync(),
-        )
-        .unwrap_or_else(|_| {
-            failure(
-                StatusCode::BAD_GATEWAY,
-                "Could not forward the WebSocket upgrade",
-            )
-        })
-}
-
-/// Tee only successful reads. Observation never changes bytes or I/O errors.
-struct ObservedIo<T> {
-    inner: T,
-    from_client: bool,
-    observation: Arc<Mutex<Observation>>,
-}
-
-impl<T: AsyncRead + Unpin> AsyncRead for ObservedIo<T> {
-    fn poll_read(
-        mut self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-        buffer: &mut ReadBuf<'_>,
-    ) -> Poll<io::Result<()>> {
-        let before = buffer.filled().len();
-        let result = Pin::new(&mut self.inner).poll_read(cx, buffer);
-        if matches!(result, Poll::Ready(Ok(()))) {
-            if let Ok(mut observation) = self.observation.lock() {
-                observation.feed(self.from_client, &buffer.filled()[before..], Instant::now());
-            }
-        }
-        result
-    }
-}
-
-impl<T: AsyncWrite + Unpin> AsyncWrite for ObservedIo<T> {
-    fn poll_write(
-        mut self: Pin<&mut Self>,
-        cx: &mut Context<'_>,
-        bytes: &[u8],
-    ) -> Poll<io::Result<usize>> {
-        Pin::new(&mut self.inner).poll_write(cx, bytes)
-    }
-    fn poll_flush(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
-        Pin::new(&mut self.inner).poll_flush(cx)
-    }
-    fn poll_shutdown(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<()>> {
-        Pin::new(&mut self.inner).poll_shutdown(cx)
-    }
-}
-
-#[derive(Default, Debug)]
-struct QueuedBytes(VecDeque<Bytes>);
-
-impl Read for QueuedBytes {
-    fn read(&mut self, target: &mut [u8]) -> io::Result<usize> {
-        let Some(front) = self.0.front_mut() else {
-            return Err(io::ErrorKind::WouldBlock.into());
-        };
-        let count = target.len().min(front.len());
-        target[..count].copy_from_slice(&front[..count]);
-        *front = front.slice(count..);
-        if front.is_empty() {
-            self.0.pop_front();
-        }
-        Ok(count)
-    }
-}
-
-/// RFC 7692 permessage-deflate is decoded only on a copy. The negotiated
-/// dictionary lifetime is independent in each direction.
-struct Decoder {
-    frames: FrameSocket<QueuedBytes>,
-    message: Option<(bool, Vec<u8>)>,
-    inflate: Option<Decompress>,
-    reset_dictionary: bool,
-}
-
-impl Decoder {
-    fn new(extensions: &str, from_client: bool) -> Self {
-        let deflate = extensions
-            .split(',')
-            .find(|value| value.trim().starts_with("permessage-deflate"));
-        let reset = if from_client {
-            "client_no_context_takeover"
-        } else {
-            "server_no_context_takeover"
-        };
-        Self {
-            frames: FrameSocket::new(QueuedBytes::default()),
-            message: None,
-            inflate: deflate.map(|_| Decompress::new(false)),
-            reset_dictionary: deflate
-                .is_some_and(|value| value.split(';').any(|part| part.trim() == reset)),
-        }
-    }
-
-    fn push(&mut self, bytes: &[u8]) {
-        if !bytes.is_empty() {
-            self.frames
-                .get_mut()
-                .0
-                .push_back(Bytes::copy_from_slice(bytes));
-        }
-    }
-
-    fn next(&mut self) -> Result<Option<Vec<u8>>, ()> {
-        loop {
-            let frame = match self.frames.read(Some(OBSERVED_REQUEST_BYTES)) {
-                Ok(Some(frame)) => frame,
-                Ok(None) => return Ok(None),
-                Err(tungstenite::Error::Io(error)) if error.kind() == io::ErrorKind::WouldBlock => {
-                    return Ok(None)
-                }
-                Err(_) => return Err(()),
-            };
-            let header = frame.header().clone();
-            if header.rsv2 || header.rsv3 {
-                return Err(());
-            }
-            match header.opcode {
-                OpCode::Control(_) => continue,
-                OpCode::Data(Data::Text | Data::Binary) if self.message.is_none() => {
-                    if header.rsv1 && self.inflate.is_none() {
-                        return Err(());
-                    }
-                    self.message = Some((header.rsv1, Vec::new()));
-                }
-                OpCode::Data(Data::Continue) if self.message.is_some() && !header.rsv1 => {}
-                _ => return Err(()),
-            }
-            let (_, message) = self.message.as_mut().ok_or(())?;
-            if message.len().saturating_add(frame.payload().len()) > OBSERVED_REQUEST_BYTES {
-                return Err(());
-            }
-            let mut payload = frame.into_payload().to_vec();
-            if let Some(mask) = header.mask {
-                // FrameSocket parses framing without modifying the copied payload.
-                for (index, byte) in payload.iter_mut().enumerate() {
-                    *byte ^= mask[index % 4];
-                }
-            }
-            message.extend(payload);
-            if !header.is_final {
-                continue;
-            }
-            let (compressed, message) = self.message.take().ok_or(())?;
-            return if compressed {
-                self.decompress(message).map(Some)
-            } else {
-                Ok(Some(message))
-            };
-        }
-    }
-
-    fn decompress(&mut self, mut input: Vec<u8>) -> Result<Vec<u8>, ()> {
-        // RFC 7692 removes the sync-flush tail from each compressed message.
-        input.extend([0, 0, 255, 255]);
-        let inflate = self.inflate.as_mut().ok_or(())?;
-        let mut output = Vec::new();
-        let mut position = 0;
-        loop {
-            let mut buffer = [0u8; 8192];
-            let before_in = inflate.total_in();
-            let before_out = inflate.total_out();
-            inflate
-                .decompress(&input[position..], &mut buffer, FlushDecompress::Sync)
-                .map_err(|_| ())?;
-            let consumed = (inflate.total_in() - before_in) as usize;
-            let produced = (inflate.total_out() - before_out) as usize;
-            if output.len().saturating_add(produced) > OBSERVED_REQUEST_BYTES {
-                return Err(());
-            }
-            output.extend_from_slice(&buffer[..produced]);
-            position += consumed;
-            if position == input.len() && produced < buffer.len() {
-                break;
-            }
-            if consumed == 0 && produced == 0 {
-                return Err(());
-            }
-        }
-        if self.reset_dictionary {
-            *inflate = Decompress::new(false);
-        }
-        Ok(output)
-    }
-}
-
-struct Pending {
-    observer: Option<ResponseObserver>,
-    owner: Option<super::CallOwner>,
-    shape: Option<RequestShape>,
-    response_id: Option<String>,
-    outputs: BTreeMap<u64, RequestShape>,
-    outputs_valid: bool,
-}
-
-struct Previous {
-    id: String,
-    shape: RequestShape,
-    output: RequestShape,
-}
-
-struct Observation {
-    state: Arc<State>,
-    client: Option<Decoder>,
-    server: Option<Decoder>,
-    pending: Option<Pending>,
-    previous: Option<Previous>,
-}
-
-impl Observation {
-    fn new(state: Arc<State>, extensions: &str) -> Self {
-        Self {
-            state,
-            client: Some(Decoder::new(extensions, true)),
-            server: Some(Decoder::new(extensions, false)),
-            pending: None,
-            previous: None,
-        }
-    }
-
-    fn feed(&mut self, from_client: bool, bytes: &[u8], now: Instant) {
-        let decoder = if from_client {
-            &mut self.client
-        } else {
-            &mut self.server
-        };
-        let Some(decoder) = decoder else {
-            return;
-        };
-        decoder.push(bytes);
-        loop {
-            let decoder = if from_client {
-                &mut self.client
-            } else {
-                &mut self.server
-            };
-            let message = decoder.as_mut().ok_or(()).and_then(Decoder::next);
-            match message {
-                Ok(Some(message)) => {
-                    if let Ok(value) = serde_json::from_slice::<Value>(&message) {
-                        if from_client {
-                            self.request(&value, &message, now);
-                        } else {
-                            self.response(&value, now);
-                        }
-                    } else {
-                        self.disable(now);
-                    }
-                }
-                Ok(None) => break,
-                Err(_) => {
-                    self.disable(now);
-                    break;
-                }
-            }
-        }
-    }
-
-    fn disable(&mut self, now: Instant) {
-        self.client = None;
-        self.server = None;
-        self.previous = None;
-        if let Some(pending) = &mut self.pending {
-            pending.shape = None;
-        }
-        self.finish(now);
-    }
-
-    fn request(&mut self, value: &Value, bytes: &[u8], now: Instant) {
-        if value["type"] != "response.create" {
-            return;
-        }
-        if self.pending.is_some() {
-            // Codex has one inference per socket. Unknown multiplexing cannot
-            // be attributed safely, but its original frames still pass through.
-            self.disable(now);
-            return;
-        }
-        let mut shape = model_calls::request_shape(ModelApi::Responses, bytes);
-        if let Some(previous_id) = value["previous_response_id"].as_str() {
-            shape = match (&self.previous, shape) {
-                (Some(previous), Some(mut shape)) if previous.id == previous_id => {
-                    shape.continue_responses(
-                        &previous.shape,
-                        &previous.output,
-                        value.get("instructions").is_none(),
-                        value.get("tools").is_none(),
-                    );
-                    Some(shape)
-                }
-                _ => None,
-            };
-        }
-        let warmup = value["generate"] == false;
-        let owner = (!warmup).then(|| (self.state.session)()).flatten();
-        if let Some(owner) = &owner {
-            self.state.in_flight.begin(&owner.session);
-        }
-        self.pending = Some(Pending {
-            observer: (!warmup).then(|| ResponseObserver::new(ModelApi::Responses, 200, true, now)),
-            owner,
-            shape,
-            response_id: None,
-            outputs: BTreeMap::new(),
-            outputs_valid: true,
-        });
-    }
-
-    fn response(&mut self, value: &Value, now: Instant) {
-        let Some(pending) = &mut self.pending else {
-            return;
-        };
-        let response_id = value["response"]["id"]
-            .as_str()
-            .or_else(|| value["response_id"].as_str());
-        if let Some(id) = response_id {
-            if pending
-                .response_id
-                .as_deref()
-                .is_some_and(|current| current != id)
-            {
-                return;
-            }
-            if self
-                .previous
-                .as_ref()
-                .is_some_and(|previous| previous.id == id)
-            {
-                return;
-            }
-            if pending.response_id.is_none() {
-                if id.len() > MAX_RESPONSE_ID_BYTES {
-                    self.disable(now);
-                    return;
-                }
-                pending.response_id = Some(id.to_owned());
-            }
-        }
-        if let Some(observer) = &mut pending.observer {
-            observer.event(value, now);
-        }
-        let kind = value["type"].as_str().unwrap_or_default();
-        if kind == "response.output_item.done" {
-            if let Some(index) = value["output_index"].as_u64() {
-                if pending.outputs.len() < MAX_OUTPUT_ITEMS || pending.outputs.contains_key(&index)
-                {
-                    pending
-                        .outputs
-                        .insert(index, RequestShape::response_item(&value["item"]));
-                } else {
-                    pending.outputs_valid = false;
-                }
-            } else {
-                pending.outputs_valid = false;
-            }
-        }
-        if kind == "response.completed" {
-            let output =
-                RequestShape::response_output(&value["response"]["output"]).or_else(|| {
-                    (pending.outputs_valid
-                        && (!pending.outputs.is_empty() || pending.observer.is_none()))
-                    .then(|| RequestShape::sum_outputs(pending.outputs.values()))
-                });
-            self.previous = match (&pending.response_id, &pending.shape, output) {
-                (Some(id), Some(shape), Some(output)) => Some(Previous {
-                    id: id.clone(),
-                    shape: shape.clone(),
-                    output,
-                }),
-                _ => None,
-            };
-            self.finish(now);
-        } else if matches!(kind, "response.incomplete" | "response.failed" | "error") {
-            self.finish(now);
-        }
-    }
-
-    fn finish(&mut self, now: Instant) {
-        if let Some(pending) = self.pending.take() {
-            if let Some(observer) = pending.observer {
-                self.state
-                    .report(pending.owner, observer.finish(pending.shape.as_ref(), now));
-            }
-        }
-    }
-}
-
-impl Drop for Observation {
-    fn drop(&mut self) {
-        self.finish(Instant::now());
-    }
-}
-
-#[cfg(test)]
-mod tests;
diff --git a/rust/lithe-agent-host/src/model_proxy/websocket/tests.rs b/rust/lithe-agent-host/src/model_proxy/websocket/tests.rs
deleted file mode 100644
index 06c9382c..00000000
--- a/rust/lithe-agent-host/src/model_proxy/websocket/tests.rs
+++ /dev/null
@@ -1,587 +0,0 @@
-use super::*;
-use crate::model_calls::ModelCall;
-use flate2::{Compress, Compression, FlushCompress};
-use serde_json::json;
-use std::time::Duration;
-use tokio::io::{AsyncReadExt, AsyncWriteExt};
-use tungstenite::protocol::frame::{Frame, FrameHeader};
-
-type Calls = Arc<Mutex<Vec<ModelCall>>>;
-
-fn observation(extensions: &str) -> (Observation, Calls) {
-    let calls: Calls = Arc::default();
-    let sink = calls.clone();
-    let state = Arc::new(State {
-        prefix: "/unit".into(),
-        upstream: "http://unit.invalid".into(),
-        origin: url::Url::parse("http://unit.invalid").unwrap(),
-        base_path: String::new(),
-        client: reqwest::Client::builder().no_proxy().build().unwrap(),
-        session: Arc::new(|| {
-            Some(super::super::CallOwner {
-                session: "session".into(),
-                generation: 1,
-            })
-        }),
-        sink: Arc::new(move |session, _, call| {
-            assert_eq!(session.as_deref(), Some("session"));
-            sink.lock().unwrap().push(call);
-        }),
-        in_flight: Arc::default(),
-        connections: std::sync::Weak::new(),
-    });
-    (Observation::new(state, extensions), calls)
-}
-
-fn frame(
-    bytes: &[u8],
-    from_client: bool,
-    compressed: bool,
-    final_frame: bool,
-    continuation: bool,
-) -> Vec<u8> {
-    let mut frame = Frame::message(
-        Bytes::copy_from_slice(bytes),
-        OpCode::Data(if continuation {
-            Data::Continue
-        } else {
-            Data::Text
-        }),
-        final_frame,
-    );
-    frame.header_mut().rsv1 = compressed;
-    if from_client {
-        frame.header_mut().mask = Some([2, 3, 5, 7]);
-    }
-    let mut encoded = Vec::new();
-    frame.format(&mut encoded).unwrap();
-    encoded
-}
-
-fn compressed(compressor: &mut Compress, bytes: &[u8]) -> Vec<u8> {
-    let mut output = Vec::with_capacity(bytes.len() + 128);
-    compressor
-        .compress_vec(bytes, &mut output, FlushCompress::Sync)
-        .unwrap();
-    assert!(output.ends_with(&[0, 0, 255, 255]));
-    output.truncate(output.len() - 4);
-    output
-}
-
-fn feed(observation: &mut Observation, from_client: bool, message: Value, now: Instant) {
-    let encoded = frame(
-        &serde_json::to_vec(&message).unwrap(),
-        from_client,
-        false,
-        true,
-        false,
-    );
-    for chunk in encoded.chunks(3) {
-        observation.feed(from_client, chunk, now);
-    }
-}
-
-fn full_request() -> Value {
-    let fixture: Value = serde_json::from_str(include_str!(concat!(
-        env!("CARGO_MANIFEST_DIR"),
-        "/../fixtures/agent/acp-events-v1.json"
-    )))
-    .unwrap();
-    fixture["upstream"]["codexSubscriptionObservation"]["request"].clone()
-}
-
-fn completed(id: &str, tokens: u64, output: Value) -> Value {
-    json!({"type":"response.completed", "response":{"id":id,"output":output,
-        "usage":{"total_tokens":tokens+10,"input_tokens":tokens,"input_tokens_details":{"cached_tokens":tokens/2},
-            "output_tokens":10,"output_tokens_details":{"reasoning_tokens":2}}}})
-}
-
-#[test]
-fn compressed_fragmented_continuations_keep_full_context_and_skip_warmup() {
-    let (mut observation, calls) = observation("permessage-deflate");
-    let mut compressor = Compress::new(Compression::fast(), false);
-    let start = Instant::now();
-    let mut warmup = full_request();
-    warmup["generate"] = json!(false);
-    let warmup = serde_json::to_vec(&warmup).unwrap();
-    let mut fragmented = frame(&warmup[..17], true, false, false, false);
-    fragmented.extend(frame(&warmup[17..], true, false, true, true));
-    for chunk in fragmented.chunks(1) {
-        observation.feed(true, chunk, start);
-    }
-    let reply = compressed(
-        &mut compressor,
-        &serde_json::to_vec(&completed("warm", 0, json!([]))).unwrap(),
-    );
-    observation.feed(false, &frame(&reply, false, true, true, false), start);
-    assert!(
-        calls.lock().unwrap().is_empty(),
-        "Connection prewarm is not a model call"
-    );
-
-    let inference = start + Duration::from_millis(10);
-    feed(
-        &mut observation,
-        true,
-        json!({"type":"response.create","previous_response_id":"warm","input":[]}),
-        inference,
-    );
-    let delta = compressed(
-        &mut compressor,
-        &serde_json::to_vec(&json!({
-            "type":"response.output_text.delta","response_id":"first","delta":"OK"
-        }))
-        .unwrap(),
-    );
-    observation.feed(
-        false,
-        &frame(&delta, false, true, true, false),
-        inference + Duration::from_millis(200),
-    );
-    let output = json!([{"type":"message","role":"assistant","content":[{"type":"output_text","text":"OK"}]}]);
-    let done = compressed(
-        &mut compressor,
-        &serde_json::to_vec(&completed("first", 1000, output.clone())).unwrap(),
-    );
-    observation.feed(
-        false,
-        &frame(&done, false, true, true, false),
-        inference + Duration::from_millis(500),
-    );
-
-    feed(
-        &mut observation,
-        true,
-        json!({"type":"response.create","previous_response_id":"first",
-        "input":[{"type":"function_call_output","call_id":"call","output":"A tool result appended to the context"}]}),
-        start + Duration::from_millis(600),
-    );
-    feed(
-        &mut observation,
-        false,
-        completed("second", 1200, json!([])),
-        start + Duration::from_millis(1000),
-    );
-    let calls = calls.lock().unwrap();
-    assert_eq!(calls.len(), 2);
-    assert_eq!(calls[0].first_token_ms, Some(200));
-    assert_eq!(calls[0].duration_ms, 500);
-    for (call, prompt) in calls.iter().zip([1000, 1200]) {
-        let context = call.context.as_ref().unwrap();
-        assert_eq!(
-            context.system_prompt_tokens
-                + context.tool_tokens
-                + context.mcp_tool_tokens
-                + context.message_tokens,
-            prompt
-        );
-        assert!(context.system_prompt_tokens > 0 && context.message_tokens > 0);
-        assert_eq!((context.tool_count, context.mcp_tool_count), (1, 1));
-        assert!(context.scaled_to_usage);
-        assert_eq!(call.model.as_deref(), Some("test-model"));
-        assert_eq!(call.usage.unwrap().cache_read_tokens, prompt / 2);
-    }
-    assert!(
-        calls[1].context.as_ref().unwrap().message_tokens
-            > calls[0].context.as_ref().unwrap().message_tokens
-    );
-}
-
-#[test]
-fn missing_continuation_keeps_real_usage_without_fabricating_a_breakdown() {
-    let (mut observation, calls) = observation("");
-    let now = Instant::now();
-    feed(
-        &mut observation,
-        true,
-        json!({"type":"response.create","previous_response_id":"not-observed","input":[]}),
-        now,
-    );
-    feed(
-        &mut observation,
-        false,
-        completed("reply", 200, json!([])),
-        now,
-    );
-    feed(
-        &mut observation,
-        false,
-        completed("reply", 200, json!([])),
-        now,
-    );
-    let calls = calls.lock().unwrap();
-    assert_eq!(
-        calls.len(),
-        1,
-        "Duplicate terminal events do not duplicate billing counters"
-    );
-    let usage = calls[0].usage.unwrap();
-    assert_eq!(
-        usage.input_tokens + usage.cache_read_tokens + usage.cache_write_tokens,
-        200
-    );
-    assert!(calls[0].context.is_none());
-}
-
-#[test]
-fn observation_budget_and_protocol_errors_do_not_retain_request_content() {
-    let (mut observation, calls) = observation("");
-    let now = Instant::now();
-    feed(&mut observation, true, full_request(), now);
-    let mut oversized_header = Vec::new();
-    FrameHeader::default()
-        .format((OBSERVED_REQUEST_BYTES + 1) as u64, &mut oversized_header)
-        .unwrap();
-    observation.feed(false, &oversized_header, now);
-    assert!(observation.client.is_none() && observation.server.is_none());
-    let calls = calls.lock().unwrap();
-    assert_eq!(calls.len(), 1);
-    assert!(calls[0].context.is_none());
-    assert!(calls[0].usage.is_none());
-}
-
-#[test]
-fn deflate_dictionary_lifetime_matches_each_negotiated_direction() {
-    for reset in [false, true] {
-        let extensions = if reset {
-            "permessage-deflate; client_no_context_takeover; server_no_context_takeover"
-        } else {
-            "permessage-deflate"
-        };
-        for from_client in [false, true] {
-            let mut decoder = Decoder::new(extensions, from_client);
-            let mut compressor = Compress::new(Compression::fast(), false);
-            for _ in 0..2 {
-                if reset {
-                    compressor = Compress::new(Compression::fast(), false);
-                }
-                let message = br#"{"type":"response.create","instructions":"Repeated shared prompt words repeated shared prompt words"}"#;
-                let encoded = compressed(&mut compressor, message);
-                let middle = encoded.len() / 2;
-                let mut bytes = frame(&encoded[..middle], from_client, true, false, false);
-                bytes.extend(frame(&encoded[middle..], from_client, false, true, true));
-                decoder.push(&bytes);
-                assert_eq!(decoder.next().unwrap().unwrap(), message);
-                assert!(decoder.next().unwrap().is_none());
-            }
-        }
-    }
-}
-
-/// Abort on every failure path; joining always has its own monotonic deadline.
-struct Task(Option<tokio::task::JoinHandle<()>>);
-impl Drop for Task {
-    fn drop(&mut self) {
-        if let Some(task) = &self.0 {
-            task.abort();
-        }
-    }
-}
-impl Task {
-    async fn finish(&mut self) {
-        tokio::time::timeout(Duration::from_secs(3), self.0.as_mut().unwrap())
-            .await
-            .expect("The local WebSocket server did not stop")
-            .unwrap();
-        self.0 = None;
-    }
-}
-
-async fn headers(stream: &mut tokio::net::TcpStream) -> String {
-    let read = async {
-        let mut bytes = Vec::new();
-        while !bytes.ends_with(b"\r\n\r\n") {
-            assert!(bytes.len() < 16 * 1024, "Bounded mock HTTP header");
-            bytes.push(stream.read_u8().await.unwrap());
-        }
-        String::from_utf8(bytes).unwrap()
-    };
-    tokio::time::timeout(Duration::from_secs(3), read)
-        .await
-        .expect("Timed out reading the local handshake")
-}
-
-#[tokio::test]
-async fn upgrade_preserves_auth_compression_control_frames_and_exact_wire_bytes() {
-    tokio::time::timeout(Duration::from_secs(5), async {
-        let listener = tokio::net::TcpListener::bind(("127.0.0.1", 0)).await.unwrap();
-        let upstream = format!("http://{}", listener.local_addr().unwrap());
-        let calls: Calls = Arc::default();
-        let sink = calls.clone();
-        let proxy = super::super::start(&upstream,
-            Arc::new(|| Some(super::super::CallOwner { session: "wire".into(), generation: 1 })),
-            Arc::new(move |_, _, call| sink.lock().unwrap().push(call)), Arc::default()).await.unwrap();
-        let request = serde_json::to_vec(&full_request()).unwrap();
-        let mut client_bytes = frame(&request[..10], true, false, false, false);
-        let mut ping = Frame::ping(Bytes::from_static(b"ping"));
-        ping.header_mut().mask = Some([1, 2, 3, 4]);
-        ping.format(&mut client_bytes).unwrap();
-        client_bytes.extend(frame(&request[10..], true, false, true, true));
-        let mut compressor = Compress::new(Compression::fast(), false);
-        let encoded = compressed(&mut compressor, &serde_json::to_vec(&completed("response", 1000, json!([]))).unwrap());
-        let mut server_bytes = frame(&encoded, false, true, true, false);
-        Frame::pong(Bytes::from_static(b"ping")).format(&mut server_bytes).unwrap();
-        let expected_request = client_bytes.clone();
-        let expected_response = server_bytes.clone();
-        let mut server = Task(Some(tokio::spawn(async move {
-            let (mut stream, _) = listener.accept().await.unwrap();
-            let request = headers(&mut stream).await.to_ascii_lowercase();
-            assert!(request.starts_with("get /responses "));
-            assert!(request.contains("authorization: bearer fake-subscription-token"));
-            assert!(request.contains("sec-websocket-extensions: permessage-deflate"));
-            stream.write_all(b"HTTP/1.1 101 Switching Protocols\r\nConnection: Upgrade\r\nUpgrade: websocket\r\nSec-WebSocket-Accept: s3pPLMBiTxaQ9kYGzzhZRbK+xOo=\r\nSec-WebSocket-Extensions: permessage-deflate\r\n\r\n").await.unwrap();
-            let mut received = vec![0; expected_request.len()];
-            stream.read_exact(&mut received).await.unwrap();
-            assert_eq!(received, expected_request, "Masking, fragments and ping frames must remain byte-identical");
-            stream.write_all(&server_bytes).await.unwrap();
-            stream.shutdown().await.unwrap();
-        })));
-        let url = url::Url::parse(proxy.base_url()).unwrap();
-        let mut client = tokio::net::TcpStream::connect(("127.0.0.1", url.port().unwrap())).await.unwrap();
-        client.write_all(format!("GET {}/responses HTTP/1.1\r\nHost: localhost\r\nConnection: Upgrade\r\nUpgrade: websocket\r\nSec-WebSocket-Key: dGhlIHNhbXBsZSBub25jZQ==\r\nSec-WebSocket-Version: 13\r\nSec-WebSocket-Extensions: permessage-deflate\r\nAuthorization: Bearer fake-subscription-token\r\n\r\n", url.path()).as_bytes()).await.unwrap();
-        let response = headers(&mut client).await;
-        assert!(response.starts_with("HTTP/1.1 101"));
-        assert!(response.to_ascii_lowercase().contains("sec-websocket-extensions: permessage-deflate"));
-        client.write_all(&client_bytes).await.unwrap();
-        let mut received = vec![0; expected_response.len()];
-        client.read_exact(&mut received).await.unwrap();
-        assert_eq!(received, expected_response, "Compression and control frames must remain byte-identical");
-        assert_eq!(calls.lock().unwrap().len(), 1);
-        assert_eq!(calls.lock().unwrap()[0].context.as_ref().unwrap().mcp_tool_count, 1);
-        client.shutdown().await.unwrap();
-        server.finish().await;
-        drop(proxy);
-    }).await.expect("Bounded local WebSocket forwarding scenario");
-}
-
-#[tokio::test]
-async fn dropping_proxy_closes_an_idle_upgraded_socket_and_its_upstream() {
-    tokio::time::timeout(Duration::from_secs(5), async {
-        let listener = tokio::net::TcpListener::bind(("127.0.0.1", 0)).await.unwrap();
-        let upstream = format!("http://{}", listener.local_addr().unwrap());
-        let proxy = super::super::start(&upstream, Arc::new(|| None), Arc::new(|_, _, _| {}), Arc::default()).await.unwrap();
-        let mut server = Task(Some(tokio::spawn(async move {
-            let (mut stream, _) = listener.accept().await.unwrap();
-            headers(&mut stream).await;
-            stream.write_all(b"HTTP/1.1 101 Switching Protocols\r\nConnection: Upgrade\r\nUpgrade: websocket\r\n\r\n").await.unwrap();
-            let mut byte = [0];
-            assert_eq!(stream.read(&mut byte).await.unwrap(), 0);
-        })));
-        let url = url::Url::parse(proxy.base_url()).unwrap();
-        let mut client = tokio::net::TcpStream::connect(("127.0.0.1", url.port().unwrap())).await.unwrap();
-        client.write_all(format!("GET {}/responses HTTP/1.1\r\nHost: localhost\r\nConnection: Upgrade\r\nUpgrade: websocket\r\n\r\n", url.path()).as_bytes()).await.unwrap();
-        assert!(headers(&mut client).await.starts_with("HTTP/1.1 101"));
-        drop(proxy);
-        let mut byte = [0];
-        assert_eq!(client.read(&mut byte).await.unwrap(), 0);
-        server.finish().await;
-    }).await.expect("Dropping the connection owner must close both peers");
-}
-
-/// Uses the installed upstream executable but fake credentials and a local
-/// provider. No account files, user prompts or real model service are touched.
-#[cfg(unix)]
-#[tokio::test]
-#[ignore = "requires LITHE_CODEX_OBSERVATION_CLI pointing to an installed Codex CLI"]
-async fn native_subscription_websocket_reports_two_turns_without_counting_prewarm() {
-    use std::process::Stdio;
-    use tokio::io::{AsyncBufReadExt, BufReader};
-    struct Native {
-        child: tokio::process::Child,
-        directory: std::path::PathBuf,
-    }
-    impl Drop for Native {
-        fn drop(&mut self) {
-            if let Some(pid) = self.child.id() {
-                // The process group also owns any native helper descendants.
-                unsafe {
-                    libc::kill(-(pid as i32), libc::SIGKILL);
-                }
-            }
-            let _ = std::fs::remove_dir_all(&self.directory);
-        }
-    }
-    const FIXTURE_TOKEN: &str = "e30.eyJlbWFpbCI6ICJwZXJzb25AZXhhbXBsZS50ZXN0IiwgImV4cCI6IDQxMDI0NDQ4MDAsICJodHRwczovL2FwaS5vcGVuYWkuY29tL2F1dGgiOiB7ImNoYXRncHRfYWNjb3VudF9pZCI6ICJmaXh0dXJlLWFjY291bnQiLCAiY2hhdGdwdF9wbGFuX3R5cGUiOiAicGx1cyJ9fQ.fake";
-    async fn read(
-        input: &mut tokio::process::ChildStdin,
-        reader: &mut tokio::io::Lines<BufReader<tokio::process::ChildStdout>>,
-    ) -> Value {
-        let message: Value = serde_json::from_str(
-            &reader
-                .next_line()
-                .await
-                .unwrap()
-                .expect("native app-server output"),
-        )
-        .unwrap();
-        if message["method"] == "account/chatgptAuthTokens/refresh" {
-            input.write_all(format!("{}\n", json!({"id":message["id"],"result":{"accessToken":FIXTURE_TOKEN,"chatgptAccountId":"fixture-account","chatgptPlanType":"plus"}})).as_bytes()).await.unwrap();
-        }
-        message
-    }
-    async fn rpc(
-        input: &mut tokio::process::ChildStdin,
-        reader: &mut tokio::io::Lines<BufReader<tokio::process::ChildStdout>>,
-        id: u64,
-        method: &str,
-        params: Value,
-    ) -> Value {
-        input
-            .write_all(format!("{}\n", json!({"id":id,"method":method,"params":params})).as_bytes())
-            .await
-            .unwrap();
-        loop {
-            let message = read(input, reader).await;
-            if message["method"] == "error" {
-                eprintln!("Native fixture error: {message}");
-            }
-            if message["id"] == id {
-                assert!(message.get("error").is_none(), "Native {method}: {message}");
-                return message["result"].clone();
-            }
-        }
-    }
-    tokio::time::timeout(Duration::from_secs(20), async {
-        let listener = tokio::net::TcpListener::bind(("127.0.0.1", 0)).await.unwrap();
-        let upstream = format!("http://{}", listener.local_addr().unwrap());
-        let calls: Calls = Arc::default();
-        let sink = calls.clone();
-        let proxy = super::super::start(&upstream,
-            Arc::new(|| Some(super::super::CallOwner { session: "native".into(), generation: 1 })),
-            Arc::new(move |_, _, call| sink.lock().unwrap().push(call)), Arc::default()).await.unwrap();
-        let real_requests = Arc::new(std::sync::atomic::AtomicUsize::new(0));
-        let measured = real_requests.clone();
-        let mut server = Task(Some(tokio::spawn(async move {
-            let mut peers = tokio::task::JoinSet::new();
-            loop {
-                let (mut stream, _) = listener.accept().await.unwrap();
-                let measured = measured.clone();
-                peers.spawn(async move {
-                    let header = headers(&mut stream).await;
-                    let key = header.lines().find_map(|line| {
-                        let (name, value) = line.split_once(':')?;
-                        name.eq_ignore_ascii_case("sec-websocket-key").then(|| value.trim())
-                    });
-                    let Some(key) = key else {
-                        let body = if header.contains("/wham/accounts/check") {
-                            r#"{"accounts":[{"id":"fixture-account","workspace_backend_origin":"https://chatgpt.com","account_routing_override":"NO_CONSTRAINT"}]}"#
-                        } else { r#"{"models":[]}"# };
-                        stream.write_all(format!("HTTP/1.1 200 OK\r\nContent-Type: application/json\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{body}", body.len()).as_bytes()).await.unwrap();
-                        return;
-                    };
-                    assert!(header.starts_with("GET /backend-api/codex/responses"));
-                    assert!(header.to_ascii_lowercase().contains("chatgpt-account-id: fixture-account"));
-                    let accept = tungstenite::handshake::derive_accept_key(key.as_bytes());
-                    // Native Codex may propose compression; a server can decline it.
-                    stream.write_all(format!("HTTP/1.1 101 Switching Protocols\r\nConnection: Upgrade\r\nUpgrade: websocket\r\nSec-WebSocket-Accept: {accept}\r\n\r\n").as_bytes()).await.unwrap();
-                    let mut decoder = Decoder::new("", true);
-                    let mut sequence = 0;
-                    loop {
-                        let mut buffer = [0; 8192];
-                        let count = stream.read(&mut buffer).await.unwrap();
-                        if count == 0 { return; }
-                        decoder.push(&buffer[..count]);
-                        while let Some(bytes) = decoder.next().unwrap() {
-                            let request: Value = serde_json::from_slice(&bytes).unwrap();
-                            assert_eq!(request["type"], "response.create");
-                            sequence += 1;
-                            let id = format!("resp_{sequence}");
-                            let warmup = request["generate"] == false;
-                            let mut events = vec![json!({"type":"response.created","response":{"id":id,"status":"in_progress","output":[]}})];
-                            let output = if warmup { json!([]) } else {
-                                measured.fetch_add(1, std::sync::atomic::Ordering::SeqCst);
-                                let item = json!({"type":"message","id":format!("msg_{sequence}"),"role":"assistant","status":"completed","content":[{"type":"output_text","text":"LOCAL_OK","annotations":[]}]});
-                                events.extend([
-                                    json!({"type":"response.output_item.added","output_index":0,"item":{"id":format!("msg_{sequence}"),"type":"message","role":"assistant","status":"in_progress","content":[]}}),
-                                    json!({"type":"response.output_text.delta","output_index":0,"content_index":0,"delta":"LOCAL_OK"}),
-                                    json!({"type":"response.output_item.done","output_index":0,"item":item}),
-                                ]);
-                                json!([item])
-                            };
-                            let mut done = completed(&id, if warmup { 0 } else { 1000 }, output);
-                            done["response"]["status"] = json!("completed");
-                            events.push(done);
-                            for event in events { stream.write_all(&frame(&serde_json::to_vec(&event).unwrap(), false, false, true, false)).await.unwrap(); }
-                        }
-                    }
-                });
-            }
-        })));
-        let directory = std::env::temp_dir().join(format!("lithe-subscription-observation-{}", uuid::Uuid::new_v4()));
-        std::fs::create_dir_all(directory.join("workspace")).unwrap();
-        let executable = std::path::PathBuf::from(std::env::var_os("LITHE_CODEX_OBSERVATION_CLI").expect("installed Codex CLI path"));
-        let (_relay, relay_env) = crate::codex_retry::Relay::create(&executable, false).unwrap();
-        let launcher = &relay_env.iter().find(|(name, _)| name == "CODEX_PATH").unwrap().1;
-        std::fs::write(directory.join("config.toml"), format!(
-            "model_provider = \"openai\"\nchatgpt_base_url = \"{upstream}/backend-api/\"\n[features]\napps = false\nplugins = false\nskip_host_skill_discovery = true\n[analytics]\nenabled = false\n"
-        )).unwrap();
-        let mut command = std::process::Command::new(launcher);
-        crate::subscription::isolate_environment(&mut command);
-        use std::os::unix::process::CommandExt;
-        command.arg("app-server").envs(relay_env.clone())
-            .env("LITHE_CODEX_OBSERVATION_BASE", format!("{}/backend-api/codex",proxy.base_url()))
-            .env("CODEX_HOME", &directory).env("NO_PROXY", "127.0.0.1,localhost")
-            .env("HTTP_PROXY", &upstream).env("HTTPS_PROXY", &upstream).env("ALL_PROXY", &upstream)
-            .current_dir(directory.join("workspace")).stdin(Stdio::piped()).stdout(Stdio::piped()).stderr(Stdio::null()).process_group(0);
-        let mut command = tokio::process::Command::from(command);
-        command.kill_on_drop(true);
-        let mut native = Native { child: command.spawn().unwrap(), directory };
-        let mut input = native.child.stdin.take().unwrap();
-        let mut reader = BufReader::new(native.child.stdout.take().unwrap()).lines();
-        rpc(&mut input, &mut reader, 1, "initialize", json!({"clientInfo":{"name":"lithe-subscription-fixture","version":"1"},"capabilities":{"experimentalApi":true}})).await;
-        input.write_all(b"{\"method\":\"initialized\"}\n").await.unwrap();
-        // Unsigned fake JWT with an example.test email; accepted only by this
-        // isolated native external-token mode and our loopback fixture.
-        input.write_all(format!("{}\n", json!({"id":2,"method":"account/login/start","params":{
-            "type":"chatgptAuthTokens", "accessToken":FIXTURE_TOKEN, "chatgptAccountId":"fixture-account","chatgptPlanType":"plus"
-        }})).as_bytes()).await.unwrap();
-        // Native login responds before its completion/account notifications.
-        // Query routing only after all three have arrived: discovery started
-        // before an account change must now be revoked by the relay.
-        let (mut replied, mut completed, mut updated) = (false, false, false);
-        while !(replied && completed && updated) {
-            let message = read(&mut input, &mut reader).await;
-            if message["id"] == 2 {
-                assert!(message.get("error").is_none(), "Native login: {message}");
-                replied = true;
-            }
-            if message["method"] == "account/login/completed" {
-                assert_eq!(message["params"]["success"], true);
-                completed = true;
-            }
-            if message["method"] == "account/updated" { updated = true; }
-        }
-        let account = rpc(&mut input, &mut reader, 10, "account/read", json!({"refreshToken":false})).await;
-        assert_eq!(account["workspaceRouting"]["accountRoutingOverride"], "NO_CONSTRAINT");
-        let thread = rpc(&mut input, &mut reader, 3, "thread/start", json!({"model":"gpt-5.4","cwd":native.directory.join("workspace"),"approvalPolicy":"never","sandbox":"read-only","ephemeral":true,
-            "config":{"openai_base_url":format!("{}/backend-api/codex",proxy.base_url())}})).await;
-        let id = thread["thread"]["id"].as_str().unwrap();
-        for turn in 0..2 {
-            rpc(&mut input, &mut reader, 4+turn, "turn/start", json!({"threadId":id,"input":[{"type":"text","text":"Reply LOCAL_OK","text_elements":[]}]})).await;
-            loop {
-                let notification = read(&mut input, &mut reader).await;
-                if notification["method"] == "error" { eprintln!("Native fixture error: {notification}"); }
-                if notification["method"] == "turn/completed" {
-                    assert_eq!(notification["params"]["turn"]["status"], "completed", "{notification}");
-                    break;
-                }
-            }
-        }
-        assert_eq!(real_requests.load(std::sync::atomic::Ordering::SeqCst), 2);
-        {
-            let calls = calls.lock().unwrap();
-            assert_eq!(calls.len(), 2, "Native connection prewarm must not count as a model call");
-            for call in calls.iter() {
-                assert_eq!(call.usage.unwrap().input_tokens + call.usage.unwrap().cache_read_tokens, 1000);
-                let context = call.context.as_ref().expect("Full native request composition");
-                assert!(context.system_prompt_tokens > 0 && context.tool_count > 0 && context.message_tokens > 0);
-                assert!(call.first_token_ms.is_some());
-            }
-        }
-        crate::terminate_tree(&mut native.child).await;
-        drop(proxy);
-        let server_task = server.0.take().unwrap();
-        server_task.abort();
-        assert!(server_task.await.unwrap_err().is_cancelled());
-    }).await.expect("Native subscription integration exceeded its local deadline");
-}
diff --git a/rust/lithe-agent-host/src/next_turn_config.rs b/rust/lithe-agent-host/src/next_turn_config.rs
deleted file mode 100644
index 1226737b..00000000
--- a/rust/lithe-agent-host/src/next_turn_config.rs
+++ /dev/null
@@ -1,232 +0,0 @@
-//! Applying the session settings a user chose while a turn was running.
-//!
-//! Choices made during a turn stay local to the product until the turn ends.
-//! The product then hands every remaining choice to the Host in one
-//! `applyNextTurnConfiguration` command. The Host applies them one ACP
-//! request at a time: model choices first, because a model change can replace
-//! the other options, then the rest in catalog order. Each remaining choice is
-//! revalidated against the latest catalog the Agent returned, and each request
-//! must be confirmed by the Agent's reported value. The first problem stops the
-//! sequence with one stable failure code.
-//! Contract: `rust/fixtures/agent/next-turn-configuration-v1.json`.
-
-use agent_client_protocol::schema::v1::{
-    SessionConfigKind, SessionConfigOption, SessionConfigOptionCategory, SessionConfigSelectOptions,
-};
-use serde::{Deserialize, Serialize};
-
-/// One selectable session setting as both products parse it from ACP.
-#[derive(Debug, Clone, PartialEq, Eq, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct CatalogOption {
-    pub id: String,
-    /// ACP category, e.g. `model`; absent for uncategorized options.
-    #[serde(default)]
-    pub category: Option<String>,
-    pub current_value: String,
-    /// Selectable value identifiers, flattened across groups.
-    pub choices: Vec<String>,
-}
-
-/// A value the user chose for the next turn.
-#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct ConfigChoice {
-    pub config_id: String,
-    pub value: String,
-}
-
-/// Why the remaining choices were abandoned. Products localize the code; a
-/// request failure additionally carries the Agent's own message.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub enum ConfigFailure {
-    /// The latest catalog no longer offers the option or the chosen value.
-    Unsupported,
-    /// The Agent answered but reported a different current value.
-    NotConfirmed,
-    /// The ACP request failed; the event's `message` is upstream diagnostics.
-    RequestFailed,
-}
-
-/// Next action of the sequence.
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub enum Step {
-    /// Send one `session/set_config_option` request.
-    Send(ConfigChoice),
-    /// Every choice is applied or already current.
-    Done,
-    /// Stop without sending the remaining choices.
-    Failed(ConfigFailure),
-}
-
-/// Deterministic state of one next-turn application.
-#[derive(Debug, Clone)]
-pub struct NextTurnPlan {
-    catalog: Vec<CatalogOption>,
-    remaining: Vec<ConfigChoice>,
-    awaiting: Option<ConfigChoice>,
-}
-
-impl NextTurnPlan {
-    /// `catalog` is the product's latest confirmed catalog. A later choice for
-    /// the same option replaces an earlier one.
-    pub fn new(catalog: Vec<CatalogOption>, choices: Vec<ConfigChoice>) -> Self {
-        let mut remaining: Vec<ConfigChoice> = Vec::new();
-        for choice in choices {
-            remaining.retain(|existing| existing.config_id != choice.config_id);
-            remaining.push(choice);
-        }
-        Self {
-            catalog,
-            remaining,
-            awaiting: None,
-        }
-    }
-
-    /// Chooses the next request against the latest catalog.
-    pub fn next(&mut self) -> Step {
-        debug_assert!(self.awaiting.is_none(), "confirm the sent choice first");
-        let is_model = |option: &CatalogOption| option.category.as_deref() == Some("model");
-        let ordered = self
-            .catalog
-            .iter()
-            .filter(|option| is_model(option))
-            .chain(self.catalog.iter().filter(|option| !is_model(option)));
-        for option in ordered {
-            let Some(index) = self
-                .remaining
-                .iter()
-                .position(|choice| choice.config_id == option.id)
-            else {
-                continue;
-            };
-            if option.current_value == self.remaining[index].value {
-                // A model change may already have produced the chosen value.
-                self.remaining.remove(index);
-                continue;
-            }
-            if !option.choices.contains(&self.remaining[index].value) {
-                return Step::Failed(ConfigFailure::Unsupported);
-            }
-            let choice = self.remaining.remove(index);
-            self.awaiting = Some(choice.clone());
-            return Step::Send(choice);
-        }
-        if self.remaining.is_empty() {
-            Step::Done
-        } else {
-            // The catalog no longer contains a chosen option at all.
-            Step::Failed(ConfigFailure::Unsupported)
-        }
-    }
-
-    /// Records the Agent's answer to the sent choice.
-    pub fn confirm(&mut self, catalog: Vec<CatalogOption>) -> Result<(), ConfigFailure> {
-        let sent = self.awaiting.take();
-        self.catalog = catalog;
-        let confirmed = sent.is_some_and(|sent| {
-            self.catalog
-                .iter()
-                .any(|option| option.id == sent.config_id && option.current_value == sent.value)
-        });
-        if confirmed {
-            Ok(())
-        } else {
-            Err(ConfigFailure::NotConfirmed)
-        }
-    }
-}
-
-/// Parses an Agent catalog the way both products do: select options only,
-/// with grouped values flattened.
-pub fn catalog(options: &[SessionConfigOption]) -> Vec<CatalogOption> {
-    options
-        .iter()
-        .filter_map(|option| {
-            let SessionConfigKind::Select(select) = &option.kind else {
-                return None;
-            };
-            let choices = match &select.options {
-                SessionConfigSelectOptions::Ungrouped(values) => values
-                    .iter()
-                    .map(|value| value.value.0.to_string())
-                    .collect(),
-                SessionConfigSelectOptions::Grouped(groups) => groups
-                    .iter()
-                    .flat_map(|group| group.options.iter())
-                    .map(|value| value.value.0.to_string())
-                    .collect(),
-                _ => Vec::new(),
-            };
-            Some(CatalogOption {
-                id: option.id.0.to_string(),
-                category: option.category.as_ref().map(category_name),
-                current_value: select.current_value.0.to_string(),
-                choices,
-            })
-        })
-        .collect()
-}
-
-fn category_name(category: &SessionConfigOptionCategory) -> String {
-    serde_json::to_value(category)
-        .ok()
-        .and_then(|value| value.as_str().map(str::to_owned))
-        .unwrap_or_default()
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use serde_json::Value;
-
-    /// Drives every fixture case against scripted Agent answers and checks
-    /// the requests, their order, and the final outcome.
-    #[test]
-    fn fixture_cases_apply_in_the_shared_order() {
-        let fixture: Value = serde_json::from_str(include_str!(
-            "../../fixtures/agent/next-turn-configuration-v1.json"
-        ))
-        .unwrap();
-        for case in fixture["cases"].as_array().unwrap() {
-            let name = case["name"].as_str().unwrap();
-            let options: Vec<SessionConfigOption> =
-                serde_json::from_value(case["catalog"].clone()).unwrap();
-            let choices: Vec<ConfigChoice> =
-                serde_json::from_value(case["choices"].clone()).unwrap();
-            let mut answers = case["answers"].as_array().unwrap().iter();
-            let mut plan = NextTurnPlan::new(catalog(&options), choices);
-            let mut sent = Vec::new();
-            let failure = loop {
-                match plan.next() {
-                    Step::Done => break None,
-                    Step::Failed(failure) => break Some(failure),
-                    Step::Send(choice) => {
-                        sent.push(serde_json::to_value(&choice).unwrap());
-                        let answer = answers.next().expect("scripted answer");
-                        if answer.get("error").is_some() {
-                            break Some(ConfigFailure::RequestFailed);
-                        }
-                        let options: Vec<SessionConfigOption> =
-                            serde_json::from_value(answer["configOptions"].clone()).unwrap();
-                        if let Err(failure) = plan.confirm(catalog(&options)) {
-                            break Some(failure);
-                        }
-                    }
-                }
-            };
-            assert_eq!(
-                Value::Array(sent),
-                case["expected"]["requests"],
-                "{name} requests"
-            );
-            assert_eq!(
-                failure.map(|failure| serde_json::to_value(failure).unwrap()),
-                case["expected"]["failure"].as_str().map(Value::from),
-                "{name} failure"
-            );
-            assert!(answers.next().is_none(), "{name} left answers unused");
-        }
-    }
-}
diff --git a/rust/lithe-agent-host/src/npm-progress.mjs b/rust/lithe-agent-host/src/npm-progress.mjs
deleted file mode 100644
index 66542af6..00000000
--- a/rust/lithe-agent-host/src/npm-progress.mjs
+++ /dev/null
@@ -1,55 +0,0 @@
-// Observe npm's own HTTP downloads without changing stream consumption, cache,
-// registry, proxy, retries, or package installation. Only numbers reach Lithe.
-import { subscribe } from "node:diagnostics_channel";
-
-const originalOptions = process.env.LITHE_NPM_ORIGINAL_NODE_OPTIONS;
-if (originalOptions) process.env.NODE_OPTIONS = originalOptions;
-else delete process.env.NODE_OPTIONS;
-delete process.env.LITHE_NPM_ORIGINAL_NODE_OPTIONS;
-
-const started = performance.now();
-let downloadedBytes = 0;
-let activeDownloads = 0;
-let previousBytes = 0;
-let previousTime = started;
-let lastReceived = started;
-const prefix = "LITHE_NPM_PROGRESS ";
-function report() {
-  const now = performance.now();
-  const seconds = (now - previousTime) / 1000;
-  const bytesPerSecond = seconds > 0 ? (downloadedBytes - previousBytes) / seconds : 0;
-  previousBytes = downloadedBytes;
-  previousTime = now;
-  process.stderr.write(prefix + JSON.stringify({
-    stage: activeDownloads > 0 ? "downloading" : downloadedBytes > 0 ? "installing" : "preparing",
-    downloadedBytes,
-    bytesPerSecond: Math.round(bytesPerSecond),
-    elapsedMilliseconds: Math.round(now - started),
-    idleMilliseconds: Math.round(now - lastReceived),
-  }) + "\n");
-}
-subscribe("http.client.response.finish", ({ request, response }) => {
-  // Registry metadata, redirects, and errors are not package downloads.
-  if (response.statusCode < 200 || response.statusCode >= 300 ||
-      !request.path.split("?")[0].endsWith(".tgz")) return;
-  activeDownloads += 1;
-  let finished = false;
-  const finish = () => {
-    if (!finished) { finished = true; activeDownloads -= 1; report(); }
-  };
-  report();
-  response.once("close", finish);
-  const push = response.push;
-  response.push = function (chunk, encoding) {
-    if (chunk !== null) {
-      downloadedBytes += Buffer.isBuffer(chunk) ? chunk.length : Buffer.byteLength(chunk, encoding);
-      lastReceived = performance.now();
-    } else finish();
-    // Preserve npm's own backpressure and EOF handling; never add a data listener.
-    return push.call(this, chunk, encoding);
-  };
-});
-report();
-const timer = setInterval(report, 500);
-timer.unref();
-process.once("exit", () => clearInterval(timer));
diff --git a/rust/lithe-agent-host/src/prompt.rs b/rust/lithe-agent-host/src/prompt.rs
deleted file mode 100644
index e19e5ccc..00000000
--- a/rust/lithe-agent-host/src/prompt.rs
+++ /dev/null
@@ -1,209 +0,0 @@
-//! Convert prompt inputs and completion responses at the upstream ACP boundary.
-
-use agent_client_protocol::schema::v1::{ContentBlock, PromptResponse, ResourceLink, TextContent};
-use serde::Deserialize;
-
-/// Bound one message's references without reading or allocating file contents.
-const MAXIMUM_FILES: usize = 32;
-
-pub(crate) fn finished(session_id: String, response: PromptResponse) -> crate::AgentEvent {
-    crate::AgentEvent::TurnFinished {
-        session_id,
-        stop_reason: crate::stop_reason_name(&response.stop_reason),
-        // Preserve upstream accounting rather than deriving usage from context occupancy.
-        usage: response.usage,
-    }
-}
-
-#[derive(Debug, Deserialize)]
-pub struct PromptFile {
-    pub uri: String,
-    pub name: String,
-}
-
-/// A native slash command is one `/word` token, not an absolute path such as
-/// `/Users/me/main.rs`, whose first token contains further separators.
-fn is_slash_command(text: &str) -> bool {
-    let Some(rest) = text.trim_start().strip_prefix('/') else {
-        return false;
-    };
-    let word = rest.split_whitespace().next().unwrap_or_default();
-    !word.is_empty() && !word.contains(['/', '\\'])
-}
-
-pub(crate) fn content(text: String, files: Vec<PromptFile>) -> Result<Vec<ContentBlock>, String> {
-    if files.len() > MAXIMUM_FILES {
-        return Err("Attach up to 32 files per message.".into());
-    }
-    let text_is_command = is_slash_command(&text);
-    let mut content = Vec::with_capacity(files.len() + 1);
-    if !text.trim().is_empty() {
-        content.push(ContentBlock::Text(TextContent::new(text)));
-    }
-    // Paths a model cannot read back from the percent-encoded link, one per line.
-    let mut decoded_paths = Vec::new();
-    for file in files {
-        let uri = url::Url::parse(&file.uri)
-            .map_err(|_| "Only local files can be attached to an Agent message.".to_string())?;
-        let local_file = uri.scheme() == "file"
-            && uri
-                .host_str()
-                .is_none_or(|host| host.eq_ignore_ascii_case("localhost"))
-            && !uri.path().is_empty()
-            && uri.query().is_none()
-            && uri.fragment().is_none();
-        if !local_file || file.name.trim().is_empty() {
-            return Err("Only local files can be attached to an Agent message.".into());
-        }
-        // Adapters hand the link to the model verbatim, and a model that reads
-        // `Pasted%20image.png` literally fails to open the file. Repeat the real
-        // path in the `📎 /path` form the transcript already recognises and hides.
-        if uri.path().contains('%') {
-            if let Ok(path) = uri.to_file_path() {
-                let path = path.display().to_string();
-                // A decoded newline would start a prompt line the user never wrote.
-                if !path.chars().any(char::is_control) {
-                    decoded_paths.push(format!("📎 {path}"));
-                }
-            }
-        }
-        content.push(ContentBlock::ResourceLink(ResourceLink::new(
-            file.name, file.uri,
-        )));
-    }
-    // A native slash command must reach the adapter exactly as typed.
-    if !decoded_paths.is_empty() && !text_is_command {
-        content.push(ContentBlock::Text(TextContent::new(
-            decoded_paths.join("\n"),
-        )));
-    }
-    if content.is_empty() {
-        return Err("Write a message or attach a file.".into());
-    }
-    Ok(content)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn optional_usage_never_prevents_a_turn_from_finishing() {
-        for usage in [
-            serde_json::Value::Null,
-            serde_json::json!({ "totalTokens": -1, "inputTokens": 1, "outputTokens": 1 }),
-            serde_json::json!({ "inputTokens": 1 }),
-        ] {
-            let response = serde_json::from_value(serde_json::json!({
-                "stopReason": "cancelled", "usage": usage
-            }))
-            .unwrap();
-            let event = serde_json::to_value(finished("session-1".into(), response)).unwrap();
-            assert_eq!(event["stopReason"], "cancelled");
-            assert!(event.get("usage").is_none());
-        }
-        let response = serde_json::from_value(serde_json::json!({
-            "stopReason": "end_turn",
-            "usage": { "totalTokens": 0, "inputTokens": 0, "outputTokens": 0 }
-        }))
-        .unwrap();
-        assert_eq!(
-            serde_json::to_value(finished("session-1".into(), response)).unwrap()["usage"],
-            serde_json::json!({ "totalTokens": 0, "inputTokens": 0, "outputTokens": 0 })
-        );
-    }
-
-    #[test]
-    fn accepts_local_file_uris_without_host_platform_assumptions() {
-        let content = content(
-            String::new(),
-            vec![PromptFile {
-                uri: "file:///example/project/README.md".into(),
-                name: "README.md".into(),
-            }],
-        )
-        .expect("local file URI");
-        assert!(matches!(
-            content.as_slice(),
-            [ContentBlock::ResourceLink(_)]
-        ));
-    }
-
-    #[test]
-    fn rejects_remote_or_qualified_file_uris() {
-        for uri in [
-            "file://server/share/README.md",
-            "file:///example/project/README.md?secret",
-            "file:///example/project/README.md#section",
-        ] {
-            assert!(content(
-                String::new(),
-                vec![PromptFile {
-                    uri: uri.into(),
-                    name: "README.md".into(),
-                }]
-            )
-            .is_err());
-        }
-    }
-
-    #[test]
-    fn encoded_paths_are_repeated_in_readable_form_for_the_model() {
-        let path = std::env::temp_dir()
-            .join("lithe-prompt-test")
-            .join("Pasted image 1.png");
-        let uri = url::Url::from_file_path(&path).expect("absolute native path");
-        let content = content(
-            "see this".into(),
-            vec![
-                PromptFile {
-                    uri: uri.into(),
-                    name: "Pasted image 1.png".into(),
-                },
-                PromptFile {
-                    uri: "file:///example/plain.png".into(),
-                    name: "plain.png".into(),
-                },
-            ],
-        )
-        .expect("local file URIs");
-        let ContentBlock::Text(text) = content.last().expect("path block") else {
-            panic!("the readable paths follow the links as text");
-        };
-        // Only the encoded path needs repeating; a plain path is already readable.
-        assert_eq!(text.text, format!("📎 {}", path.display()));
-        assert_eq!(content.len(), 4);
-    }
-
-    #[test]
-    fn native_slash_commands_are_never_followed_by_extra_text() {
-        let path = std::env::temp_dir()
-            .join("lithe-prompt-test")
-            .join("Pasted image.png");
-        let content = content(
-            "/status".into(),
-            vec![PromptFile {
-                uri: url::Url::from_file_path(path)
-                    .expect("absolute native path")
-                    .into(),
-                name: "Pasted image.png".into(),
-            }],
-        )
-        .expect("local file URI");
-        assert!(matches!(
-            content.as_slice(),
-            [ContentBlock::Text(_), ContentBlock::ResourceLink(_)]
-        ));
-    }
-
-    #[test]
-    fn only_a_single_slash_word_is_a_native_command() {
-        assert!(is_slash_command("/compact"));
-        assert!(is_slash_command("  /review src"));
-        assert!(!is_slash_command(
-            "/Users/me/proj/main.rs why does this fail?"
-        ));
-        assert!(!is_slash_command("/"));
-        assert!(!is_slash_command("hello /compact"));
-    }
-}
diff --git a/rust/lithe-agent-host/src/prompt_retry.rs b/rust/lithe-agent-host/src/prompt_retry.rs
deleted file mode 100644
index 6648ead1..00000000
--- a/rust/lithe-agent-host/src/prompt_retry.rs
+++ /dev/null
@@ -1,479 +0,0 @@
-//! Shared prompt activity, API-key recovery budgets and failure normalization.
-//!
-//! The native CLI has one retry budget for permanent and temporary errors and
-//! may honor minutes of Retry-After. Disable that layer through public options;
-//! retry only categorical pre-work Claude failures and the native HTTP 429 gap
-//! here. Codex otherwise owns recovery; both retain one busy turn and owner.
-
-use std::{
-    future::Future,
-    sync::{
-        atomic::{AtomicU64, Ordering},
-        Arc,
-    },
-    time::Duration,
-};
-
-use agent_client_protocol::{
-    schema::v1::{CancelNotification, PromptRequest, PromptResponse, StopReason},
-    Agent, ConnectionTo, Error,
-};
-use tokio::{sync::watch, time::Instant};
-
-use crate::{codex_retry, AgentEvent, Emit};
-
-pub(crate) const MAX_ATTEMPTS: u32 = 5;
-/// Pre-work reconnecting window, excluding the first attempt and cancellation ACK.
-pub(crate) const RETRY_WINDOW: Duration = Duration::from_secs(20);
-
-/// Both native clients use this advisory threshold; silence cannot prove a stall.
-pub(crate) fn quiet_notice_delay() -> Duration {
-    #[derive(serde::Deserialize)]
-    #[serde(rename_all = "camelCase")]
-    struct Policy {
-        quiet_notice_milliseconds: u64,
-    }
-    static DELAY: std::sync::OnceLock<Duration> = std::sync::OnceLock::new();
-    *DELAY.get_or_init(|| {
-        let policy: Policy =
-            serde_json::from_str(include_str!("../../contracts/agent-turn-policy.json"))
-                .expect("valid bundled Agent turn policy");
-        Duration::from_millis(policy.quiet_notice_milliseconds)
-    })
-}
-
-#[derive(Clone)]
-pub(crate) struct State {
-    last_progress: Instant,
-    pending_permissions: usize,
-    eligible: bool,
-    pub(crate) cancelling: bool,
-    deadline: Option<Instant>,
-    last_failure: Option<String>,
-    provider_message: Option<String>,
-    native: bool,
-    native_attempt: u32,
-    /// Native recovery after work has no Host deadline. Its first warning starts
-    /// an advisory clock; repeated warnings cannot postpone that notice.
-    recovery_since: Option<Instant>,
-    /// Retained across prompts of this session so delayed old warnings cannot
-    /// enter a fresh turn after its predecessor's terminal response.
-    native_sequence: Arc<AtomicU64>,
-    stop_message: Option<String>,
-    native_replay_safe: bool,
-}
-
-impl State {
-    pub(crate) fn new(enabled: bool) -> Self {
-        Self {
-            last_progress: Instant::now(),
-            pending_permissions: 0,
-            eligible: enabled,
-            cancelling: false,
-            deadline: None,
-            last_failure: None,
-            provider_message: None,
-            native: false,
-            native_attempt: 1,
-            recovery_since: None,
-            native_sequence: Arc::new(AtomicU64::new(0)),
-            stop_message: None,
-            native_replay_safe: false,
-        }
-    }
-
-    pub(crate) fn native(sequence: Arc<AtomicU64>) -> Self {
-        Self {
-            native: true,
-            native_replay_safe: true,
-            native_sequence: sequence,
-            ..Self::new(false)
-        }
-    }
-
-    /// Output or a permission request makes replay unsafe and ends the short
-    /// retry window. The upstream Agent still owns its model and tool budgets.
-    pub(crate) fn progress(&mut self) {
-        self.last_progress = Instant::now();
-        self.eligible = false;
-        self.native_replay_safe = false;
-        self.deadline = None;
-        self.recovery_since = None;
-        if self.native && self.stop_message.is_none() {
-            self.native_attempt = 1;
-        }
-        // Output cannot revoke an already observed terminal native failure.
-        if self.stop_message.is_some() {
-            self.deadline = Some(Instant::now());
-        }
-    }
-
-    pub(crate) fn permission_started(&mut self) {
-        self.progress();
-        self.pending_permissions += 1;
-    }
-
-    pub(crate) fn permission_finished(&mut self) {
-        self.pending_permissions = self.pending_permissions.saturating_sub(1);
-        self.progress();
-    }
-
-    /// AIR's public failure extension suppresses synthetic assistant error text.
-    /// Retain its title for the terminal error; categories never come from text.
-    pub(crate) fn observe_failure(&mut self, update: &serde_json::Value) {
-        if self.native {
-            return;
-        }
-        let air = &update["_meta"]["jetbrains"]["air"];
-        let failure = &air["sessionFailure"];
-        if update["sessionUpdate"] == "session_info_update"
-            && air["version"] == 1
-            && failure["severity"] == "error"
-        {
-            if let Some(title) = failure["title"]
-                .as_str()
-                .filter(|title| !title.trim().is_empty() && title.len() <= 8192)
-            {
-                self.provider_message = Some(failure_message(failure, title));
-            }
-        }
-    }
-
-    /// Native Codex owns retries; the host observes real error notifications
-    /// rather than issuing another prompt or parsing its reconnect counter.
-    pub(crate) fn observe_native_retry(
-        &mut self,
-        update: &serde_json::Value,
-    ) -> Option<(String, u32, Option<u32>)> {
-        if !self.native
-            || self.cancelling
-            || self.stop_message.is_some()
-            || update["sessionUpdate"] != "session_info_update"
-        {
-            return None;
-        }
-        let air = &update["_meta"]["jetbrains"]["air"];
-        if air["version"] != 1 {
-            return None;
-        }
-        let failure = &air["sessionFailure"];
-        let native = codex_retry::failure(failure["title"].as_str()?)?;
-        if native["activeTurn"] != true {
-            return None;
-        }
-        let sequence = native["sequence"].as_u64()?;
-        if sequence <= self.native_sequence.load(Ordering::SeqCst) {
-            return None;
-        }
-        let turn_id = native["turnId"].as_str()?.to_owned();
-        if turn_id.is_empty() {
-            return None;
-        }
-        self.native_sequence.fetch_max(sequence, Ordering::SeqCst);
-        let message = native["message"].as_str()?.to_owned();
-        if failure["severity"] == "error" || codex_retry::permanent(&native) {
-            self.stop_message = Some(message);
-            self.deadline = Some(Instant::now());
-            return None;
-        }
-        if failure["severity"] != "warning" || native["willRetry"] != true {
-            return None;
-        }
-        self.last_failure = Some(message.clone());
-        self.native_attempt = self.native_attempt.saturating_add(1);
-        if !self.native_replay_safe {
-            // The engine owns this in-flight stream and its configured budget.
-            // A Host deadline or second counter can abort recoverable work;
-            // resending the prompt could execute its tools a second time.
-            self.recovery_since.get_or_insert_with(Instant::now);
-            return Some((turn_id, self.native_attempt, None));
-        }
-        self.deadline
-            .get_or_insert_with(|| Instant::now() + RETRY_WINDOW);
-        if self.native_attempt > MAX_ATTEMPTS {
-            self.stop_message = Some(format!(
-                "Reconnecting failed after five attempts. {message}"
-            ));
-            self.deadline = Some(Instant::now());
-            return None;
-        }
-        Some((turn_id, self.native_attempt, Some(MAX_ATTEMPTS)))
-    }
-
-    pub(crate) fn timeout_message(&self) -> String {
-        if let Some(message) = &self.stop_message {
-            return message.clone();
-        }
-        match &self.last_failure {
-            Some(message) if self.deadline.is_some() => {
-                format!("Reconnecting exceeded 20 seconds. The turn was stopped. {message}")
-            }
-            _ => "The Agent connection stopped before the turn finished.".into(),
-        }
-    }
-
-    fn can_replay(&self) -> bool {
-        self.stop_message.is_none() && (self.eligible || (self.native && self.native_replay_safe))
-    }
-}
-
-/// Use the adapter's public errorKind convention; never infer retryability from
-/// arbitrary human-readable text, HTTP-looking model prose or unknown errors.
-fn retryable(error: &Error) -> bool {
-    if let Some(failure) = error
-        .data
-        .as_ref()
-        .and_then(|data| data.get("sessionFailure"))
-    {
-        // Recovery actions are the adapter's explicit policy. Request, access
-        // and exhausted-quota failures carry no retry action in this lane.
-        // Some gateways' 400/402 bodies become generic service failures in the
-        // CLI. Its error banner may veto retries; it can never enable one.
-        if reported_http_status(failure["title"].as_str().unwrap_or_default())
-            .is_some_and(|status| status < 500 && !matches!(status, 408 | 409 | 429))
-        {
-            return false;
-        }
-        return matches!(failure["category"].as_str(), Some("service" | "limit"))
-            && failure["actions"]
-                .as_array()
-                .is_some_and(|actions| actions.iter().any(|action| action == "retry"));
-    }
-    matches!(
-        error
-            .data
-            .as_ref()
-            .and_then(|data| data.get("errorKind"))
-            .and_then(|kind| kind.as_str()),
-        Some("rate_limit" | "overloaded" | "server_error" | "transport_lost")
-    )
-}
-
-/// Narrow compatibility guard for the CLI's provider-error banner, only within
-/// a negotiated typed failure. Model text and arbitrary prose never reach it.
-fn reported_http_status(title: &str) -> Option<u16> {
-    let title = title.strip_prefix("API Error: ")?;
-    let title = title.strip_prefix("Request rejected (").unwrap_or(title);
-    let code = title.get(..3)?;
-    if !code.bytes().all(|byte| byte.is_ascii_digit())
-        || !matches!(title.as_bytes().get(3), None | Some(b' ' | b')' | b':'))
-    {
-        return None;
-    }
-    code.parse()
-        .ok()
-        .filter(|status| (100..=599).contains(status))
-}
-
-fn failure_message(failure: &serde_json::Value, title: &str) -> String {
-    if let Some(native) = codex_retry::failure(title) {
-        return native["message"]
-            .as_str()
-            .unwrap_or("The Codex request failed.")
-            .into();
-    }
-    match failure["details"]
-        .as_str()
-        .filter(|details| !details.trim().is_empty() && details.len() <= 8192)
-    {
-        Some(details) => format!("{title}\n{details}"),
-        None => title.into(),
-    }
-}
-
-/// Preserve actionable error text without exposing the AIR incident object.
-pub(crate) fn error_message(error: &Error) -> String {
-    // Keep incident ids, revisions and duplicated JSON internal to retry policy.
-    if error.data.as_ref().is_some_and(|data| {
-        data.get("sessionFailure").is_some() || data["litheRecoveryStopped"] == true
-    }) {
-        error.message.clone()
-    } else {
-        error.to_string()
-    }
-}
-
-/// Negotiated AIR failures complete with end_turn and a typed response payload,
-/// not a JSON-RPC rejection. Normalize them before success reaches the product.
-fn terminal_failure(response: &PromptResponse) -> Option<Error> {
-    let meta = serde_json::to_value(response).ok()?;
-    let air = &meta["_meta"]["jetbrains"]["air"];
-    let failure = &air["sessionFailure"];
-    if air["version"] != 1 || failure["severity"] != "error" {
-        return None;
-    }
-    let title = failure["title"]
-        .as_str()
-        .filter(|title| {
-            !title.trim().is_empty()
-                && (title.len() <= 8192 || codex_retry::failure(title).is_some())
-        })
-        .unwrap_or("The Agent request failed.");
-    Some(
-        Error::new(-32603, failure_message(failure, title))
-            .data(serde_json::json!({"sessionFailure": failure})),
-    )
-}
-
-pub(crate) fn is_progress(update: &serde_json::Value) -> bool {
-    match update["sessionUpdate"].as_str() {
-        Some("agent_message_chunk" | "agent_thought_chunk") => {
-            update["content"]["text"]
-                .as_str()
-                .is_some_and(|text| !text.is_empty())
-                || update["content"]["type"]
-                    .as_str()
-                    .is_some_and(|kind| kind != "text")
-        }
-        Some(
-            "tool_call"
-            | "tool_call_update"
-            | "plan"
-            | "subagent_spawned"
-            | "subagent_state_update",
-        ) => true,
-        _ => false,
-    }
-}
-
-/// Reuse the upstream session and agent, sending another prompt only after the
-/// previous one terminated with a known temporary error and no visible work.
-pub(crate) async fn run(
-    connection: ConnectionTo<Agent>,
-    request: PromptRequest,
-    state: watch::Sender<State>,
-    mut changes: watch::Receiver<State>,
-    turn_id: String,
-    emit: Emit,
-) -> Result<PromptResponse, Error> {
-    for attempt in 1..=MAX_ATTEMPTS {
-        state.send_modify(|current| current.provider_message = None);
-        let mut result = connection.send_request(request.clone()).block_task().await;
-        if let Ok(response) = &result {
-            if let Some(failure) = terminal_failure(response) {
-                if state.borrow().native {
-                    if let Some(sequence) = codex_retry::terminal_sequence(&failure) {
-                        state
-                            .borrow()
-                            .native_sequence
-                            .fetch_max(sequence, Ordering::SeqCst);
-                    }
-                }
-                result = Err(failure);
-            }
-        }
-        // A native response and the stop deadline can become ready together.
-        // Keep the already observed failure even if a late response succeeds;
-        // the settled request itself proves acknowledgment in this branch.
-        if let Some(message) = &state.borrow().stop_message {
-            return Err(Error::new(-32603, message.clone())
-                .data(serde_json::json!({"litheRecoveryStopped": true})));
-        }
-        if let (Err(error), Some(message)) = (&mut result, &state.borrow().provider_message) {
-            error.message = message.clone();
-        }
-        let Err(error) = &result else { return result };
-        let can_reconnect = !state.borrow().cancelling
-            && state.borrow().can_replay()
-            && (retryable(error) && state.borrow().eligible
-                || codex_retry::rate_limit(error)
-                    && state.borrow().native
-                    && state.borrow().native_attempt < MAX_ATTEMPTS);
-        if can_reconnect {
-            // An ACP failure settled the attempt, but its SDK stream may retain
-            // a queued failed request. Clear it even after the final attempt so
-            // an explicit next message cannot replay that pending work.
-            crate::failure_log::cancel_notification(
-                connection.send_notification(CancelNotification::new(request.session_id.clone())),
-            );
-        }
-        if attempt == MAX_ATTEMPTS || !can_reconnect {
-            return result;
-        }
-        state.send_modify(|current| {
-            current
-                .deadline
-                .get_or_insert_with(|| Instant::now() + RETRY_WINDOW);
-            current.last_failure = Some(error_message(error));
-            if current.native {
-                current.native_attempt += 1;
-            }
-        });
-        emit(AgentEvent::TurnRetrying {
-            session_id: request.session_id.0.to_string(),
-            turn_id: turn_id.clone(),
-            attempt: if state.borrow().native {
-                state.borrow().native_attempt
-            } else {
-                attempt + 1
-            },
-            max_attempts: Some(MAX_ATTEMPTS),
-        });
-        // Four delays total 7.5 seconds. Provider Retry-After is not propagated
-        // into this interactive policy; the user may retry again after failure.
-        let delay = tokio::time::sleep(Duration::from_millis(500 << (attempt - 1)));
-        tokio::pin!(delay);
-        loop {
-            if changes.borrow().cancelling {
-                return Ok(PromptResponse::new(StopReason::Cancelled));
-            }
-            if !changes.borrow().can_replay() {
-                return result;
-            }
-            tokio::select! {
-                _ = &mut delay => break,
-                changed = changes.changed() => if changed.is_err() { return result; },
-            }
-        }
-        if state.borrow().cancelling {
-            return Ok(PromptResponse::new(StopReason::Cancelled));
-        }
-        if !state.borrow().can_replay() {
-            return result;
-        }
-    }
-    unreachable!("bounded retry loop always returns its last result")
-}
-
-/// Keep the in-flight future alive on timeout so its owner can cancel and await
-/// acknowledgment before releasing the turn or stopping the process tree.
-pub(crate) async fn wait<F, T>(
-    response: F,
-    mut changes: watch::Receiver<State>,
-    activity: impl Fn(bool),
-) -> Result<T, ()>
-where
-    F: Future<Output = T>,
-{
-    let mut quiet_since = None;
-    tokio::pin!(response);
-    loop {
-        let state = changes.borrow().clone();
-        let suppressed =
-            state.cancelling || state.pending_permissions > 0 || state.deadline.is_some();
-        let notice_since = state.recovery_since.unwrap_or(state.last_progress);
-        if quiet_since.is_some_and(|previous| previous != notice_since || suppressed) {
-            quiet_since = None;
-            activity(false);
-        }
-        let notice =
-            (!suppressed && quiet_since.is_none()).then(|| notice_since + quiet_notice_delay());
-        // Only pre-work recovery and terminal failures have a hard deadline.
-        // Native recovery after work remains active until its engine ends it.
-        let deadline = state.deadline.or(notice);
-        tokio::select! {
-            result = &mut response => return Ok(result),
-            _ = async {
-                match deadline {
-                    Some(deadline) => tokio::time::sleep_until(deadline).await,
-                    None => std::future::pending().await,
-                }
-            } => {
-                if state.deadline.is_some() { return Err(()); }
-                quiet_since = Some(notice_since);
-                activity(true);
-            },
-            changed = changes.changed() => if changed.is_err() { return Err(()); },
-        }
-    }
-}
diff --git a/rust/lithe-agent-host/src/session_defaults.rs b/rust/lithe-agent-host/src/session_defaults.rs
deleted file mode 100644
index a660abe5..00000000
--- a/rust/lithe-agent-host/src/session_defaults.rs
+++ /dev/null
@@ -1,248 +0,0 @@
-//! Resolve stale new-session model defaults through the adapter's own catalog.
-//!
-//! Codex ACP retains an unknown configured model as a synthetic selector choice.
-//! Its legacy model state excludes that choice, and its versioned AIR extension
-//! may supply a recommended model. Without one, select from the catalog itself;
-//! neither availability nor preference is guessed from a model name.
-
-use agent_client_protocol::schema::v1::{
-    NewSessionRequest, NewSessionResponse, SessionConfigKind, SessionConfigOptionCategory,
-    SessionConfigSelectOptions, SetSessionConfigOptionRequest,
-};
-use agent_client_protocol::{Agent, ConnectionTo, JsonRpcRequest, JsonRpcResponse};
-use serde::{Deserialize, Serialize};
-
-/// Preserve the adapter's optional legacy model catalog, which SDK v1 discards.
-/// Standard request fields and transport remain owned by the ACP SDK.
-#[derive(Debug, Clone, Serialize, Deserialize, JsonRpcRequest)]
-#[request(method = "session/new", response = CatalogSessionResponse)]
-struct CatalogSessionRequest {
-    #[serde(flatten)]
-    request: NewSessionRequest,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize, JsonRpcResponse)]
-struct CatalogSessionResponse {
-    #[serde(flatten)]
-    session: NewSessionResponse,
-    #[serde(default)]
-    models: Option<serde_json::Value>,
-}
-
-/// Codex legacy ids are `base-model[reasoning-effort]`; selectors use the base.
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-struct LegacyModelState {
-    current_model_id: String,
-    available_models: Vec<LegacyModel>,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-struct LegacyModel {
-    model_id: String,
-}
-
-fn base_model(id: &str) -> &str {
-    id.strip_suffix(']')
-        .and_then(|id| id.rsplit_once('[').map(|(base, _)| base))
-        .unwrap_or(id)
-}
-
-/// Find a valid replacement from the Agent-owned catalog without guessing a
-/// model name. The AIR recommendation wins; older adapters fall back to the
-/// first catalog choice that the Agent exposed in its selector.
-fn replacement(response: &CatalogSessionResponse) -> Option<(String, String)> {
-    // Optional legacy fields must not turn an otherwise valid ACP response into
-    // an error when a different adapter uses another model-state shape.
-    let models: LegacyModelState =
-        serde_json::from_value(response.models.as_ref()?.clone()).ok()?;
-    let available = |value: &str| {
-        models
-            .available_models
-            .iter()
-            .any(|model| base_model(&model.model_id) == value)
-    };
-    let options = response.session.config_options.as_ref()?;
-    for option in options {
-        if option.category != Some(SessionConfigOptionCategory::Model) {
-            continue;
-        }
-        let SessionConfigKind::Select(select) = &option.kind else {
-            continue;
-        };
-        let current = select.current_value.0.as_ref();
-        if current != base_model(&models.current_model_id) || available(current) {
-            continue;
-        }
-        let recommended = option
-            .meta
-            .as_ref()
-            .and_then(|meta| meta.get("jetbrains"))
-            .and_then(|jetbrains| jetbrains.get("air"))
-            .filter(|air| {
-                air.get("version")
-                    .and_then(serde_json::Value::as_u64)
-                    .unwrap_or(0)
-                    >= 1
-            })
-            .and_then(|air| air.get("recommendedValue"))
-            .and_then(serde_json::Value::as_str)
-            .filter(|value| available(value));
-        let selectable = |value: &str| match &select.options {
-            SessionConfigSelectOptions::Ungrouped(options) => options
-                .iter()
-                .any(|choice| choice.value.0.as_ref() == value),
-            SessionConfigSelectOptions::Grouped(groups) => groups.iter().any(|group| {
-                group
-                    .options
-                    .iter()
-                    .any(|choice| choice.value.0.as_ref() == value)
-            }),
-            _ => false,
-        };
-        if let Some(recommended) = recommended.filter(|value| selectable(value)) {
-            return Some((option.id.0.to_string(), recommended.to_owned()));
-        }
-        let fallback = models
-            .available_models
-            .iter()
-            .map(|model| base_model(&model.model_id))
-            .find(|value| selectable(value));
-        if let Some(fallback) = fallback {
-            return Some((option.id.0.to_string(), fallback.to_owned()));
-        }
-    }
-    None
-}
-
-/// Create and, when necessary, repair only a new session. The caller's single
-/// request deadline covers both requests; history and global CLI files stay intact.
-pub(crate) async fn new_session(
-    connection: &ConnectionTo<Agent>,
-    request: NewSessionRequest,
-) -> Result<NewSessionResponse, agent_client_protocol::Error> {
-    let mut response = connection
-        .send_request(CatalogSessionRequest { request })
-        .block_task()
-        .await?;
-    if let Some((id, model)) = replacement(&response) {
-        let configured = connection
-            .send_request(SetSessionConfigOptionRequest::new(
-                response.session.session_id.clone(),
-                id.clone(),
-                model.as_str(),
-            ))
-            .block_task()
-            .await?;
-        let confirmed = configured.config_options.iter().any(|option| {
-            option.id.0.as_ref() == id
-                && matches!(&option.kind, SessionConfigKind::Select(select) if select.current_value.0.as_ref() == model)
-        });
-        if !confirmed {
-            return Err(super::internal(
-                "The Agent did not confirm the selected model. Retry the conversation.",
-            ));
-        }
-        response.session.config_options = Some(configured.config_options);
-    }
-    Ok(response.session)
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn repair_uses_recommendation_or_a_selectable_catalog_model() {
-        let fixture: serde_json::Value =
-            serde_json::from_str(include_str!("../../fixtures/agent/acp-events-v1.json")).unwrap();
-        let initial = fixture["upstream"]["staleModelSession"].clone();
-        let parsed = |value| serde_json::from_value::<CatalogSessionResponse>(value).unwrap();
-        assert_eq!(
-            replacement(&parsed(initial.clone())),
-            Some(("model".into(), "model-current".into()))
-        );
-        for (mutation, expected) in [
-            ("validCurrent", None),
-            ("noCatalog", None),
-            ("malformedCatalog", None),
-            ("emptyCatalog", None),
-            ("noRecommendation", Some(("model", "model-current"))),
-            (
-                "unavailableRecommendation",
-                Some(("model", "model-current")),
-            ),
-            ("wrongVersion", Some(("model", "model-current"))),
-            ("preferRecommendation", Some(("model", "model-other"))),
-            ("unselectableRecommendation", Some(("model", "model-other"))),
-            (
-                "groupedWithoutRecommendation",
-                Some(("model", "model-current")),
-            ),
-            ("noSelectableCatalogModel", None),
-            ("mismatchedCurrent", None),
-        ] {
-            let mut value = initial.clone();
-            match mutation {
-                "validCurrent" => value["models"]["availableModels"]
-                    .as_array_mut()
-                    .unwrap()
-                    .push(serde_json::json!({"modelId": "model-retired[max]"})),
-                "noCatalog" => {
-                    value.as_object_mut().unwrap().remove("models");
-                }
-                "malformedCatalog" => {
-                    value["models"] = serde_json::json!({"availableModels": "invalid"})
-                }
-                "emptyCatalog" => value["models"]["availableModels"] = serde_json::json!([]),
-                "noRecommendation" => {
-                    value["configOptions"][0]
-                        .as_object_mut()
-                        .unwrap()
-                        .remove("_meta");
-                }
-                "unavailableRecommendation" => {
-                    value["configOptions"][0]["_meta"]["jetbrains"]["air"]["recommendedValue"] =
-                        serde_json::json!("unknown")
-                }
-                "wrongVersion" => {
-                    value["configOptions"][0]["_meta"]["jetbrains"]["air"]["version"] =
-                        serde_json::json!(0)
-                }
-                "preferRecommendation" => {
-                    value["configOptions"][0]["_meta"]["jetbrains"]["air"]["recommendedValue"] =
-                        serde_json::json!("model-other")
-                }
-                "unselectableRecommendation" => {
-                    value["configOptions"][0]["options"]
-                        .as_array_mut()
-                        .unwrap()
-                        .remove(1);
-                }
-                "groupedWithoutRecommendation" => {
-                    let option = &mut value["configOptions"][0];
-                    option.as_object_mut().unwrap().remove("_meta");
-                    option["options"] = serde_json::json!([{
-                        "group": "official", "name": "Official", "options": option["options"]
-                    }]);
-                }
-                "noSelectableCatalogModel" => {
-                    value["configOptions"][0]["options"]
-                        .as_array_mut()
-                        .unwrap()
-                        .truncate(1);
-                }
-                "mismatchedCurrent" => {
-                    value["models"]["currentModelId"] = serde_json::json!("different[max]")
-                }
-                _ => unreachable!(),
-            }
-            assert_eq!(
-                replacement(&parsed(value)),
-                expected.map(|(id, model)| (id.into(), model.into())),
-                "{mutation}"
-            );
-        }
-    }
-}
diff --git a/rust/lithe-agent-host/src/session_restore.rs b/rust/lithe-agent-host/src/session_restore.rs
deleted file mode 100644
index 33dfcf48..00000000
--- a/rust/lithe-agent-host/src/session_restore.rs
+++ /dev/null
@@ -1,68 +0,0 @@
-//! Synchronize a restored Claude model through the adapter's public ACP API.
-//!
-//! Claude ACP can report its last transcript model while the SDK query uses a
-//! launch default. Re-assert the reported selection before publishing the load;
-//! neither transcript files nor installed third-party code belong to the host.
-
-use agent_client_protocol::schema::v1::{
-    LoadSessionRequest, LoadSessionResponse, SessionConfigKind, SessionConfigOptionCategory,
-    SetSessionConfigOptionRequest,
-};
-use agent_client_protocol::{Agent, ConnectionTo};
-
-/// Restore history and, for the Claude API-key route, confirm its model before
-/// returning. The caller's single load deadline covers both ACP requests.
-pub(crate) async fn load_session(
-    connection: &ConnectionTo<Agent>,
-    request: LoadSessionRequest,
-    confirm_model: bool,
-) -> Result<LoadSessionResponse, agent_client_protocol::Error> {
-    let session_id = request.session_id.clone();
-    let mut response = connection.send_request(request).block_task().await?;
-    if !confirm_model {
-        return Ok(response);
-    }
-    let selection = response.config_options.as_ref().and_then(|options| {
-        options.iter().find_map(|option| {
-            if option.category != Some(SessionConfigOptionCategory::Model) {
-                return None;
-            }
-            let SessionConfigKind::Select(select) = &option.kind else {
-                return None;
-            };
-            Some((option.id.clone(), select.current_value.clone()))
-        })
-    });
-    let Some((id, model)) = selection else {
-        // Older adapters without a model selector retain standard ACP loading.
-        return Ok(response);
-    };
-    if model.0.trim().is_empty() {
-        return Err(super::internal(
-            "The Agent did not report a restored model.",
-        ));
-    }
-    // The pinned adapter accepts its current value even when it is outside the
-    // picker. Do not substitute another model or skip an unchanged selection:
-    // this round-trip repairs a discrepancy between reported and running state.
-    let configured = connection
-        .send_request(SetSessionConfigOptionRequest::new(
-            session_id,
-            id.clone(),
-            model.0.as_ref(),
-        ))
-        .block_task()
-        .await?;
-    let confirmed = configured.config_options.iter().any(|option| {
-        option.id == id
-            && option.category == Some(SessionConfigOptionCategory::Model)
-            && matches!(&option.kind, SessionConfigKind::Select(select) if select.current_value == model)
-    });
-    if !confirmed {
-        return Err(super::internal(
-            "The Agent did not confirm the restored model. Retry loading the conversation.",
-        ));
-    }
-    response.config_options = Some(configured.config_options);
-    Ok(response)
-}
diff --git a/rust/lithe-agent-host/src/session_routing.rs b/rust/lithe-agent-host/src/session_routing.rs
deleted file mode 100644
index 229ce26e..00000000
--- a/rust/lithe-agent-host/src/session_routing.rs
+++ /dev/null
@@ -1,82 +0,0 @@
-//! Claude API-key routing through the upstream adapter's public session options.
-//!
-//! Credentials reach the adapter over ACP stdio, never through host launch
-//! arguments, environment, or files. The adapter and Claude SDK own their native
-//! credential conversion; Lithe does not patch installed third-party packages.
-
-use serde_json::{json, Map, Value};
-
-use crate::{GatewaySignIn, ProviderProtocol};
-
-/// Apply the explicit route and startup model when creating a Claude session.
-pub(crate) fn metadata(
-    route: Option<&GatewaySignIn>,
-) -> Result<Option<Map<String, Value>>, String> {
-    let Some(route) = route.filter(|route| route.protocol == ProviderProtocol::AnthropicMessages)
-    else {
-        return Ok(None);
-    };
-    let key = route
-        .headers
-        .iter()
-        .find(|(name, value)| name == "x-api-key" && !value.trim().is_empty())
-        .ok_or("The Claude API key route is missing its credential")?;
-    // Gateway mode injects `Bearer acp-proxy`, even with a real x-api-key. Native
-    // API-key options avoid that token and retain the complete upstream agent.
-    let env = json!({
-        "ANTHROPIC_BASE_URL": route.base_url,
-        "ANTHROPIC_API_KEY": key.1,
-        "ANTHROPIC_AUTH_TOKEN": "",
-        "ANTHROPIC_CUSTOM_HEADERS": "",
-        "CLAUDE_CODE_OAUTH_TOKEN": "",
-        // The CLI retries even invalid API keys ten times by default. Its public
-        // retry budget is shared by all errors and honors long Retry-After.
-        // The host instead bounds retries of typed temporary ACP failures.
-        "CLAUDE_CODE_MAX_RETRIES": "0",
-        "CLAUDE_CODE_RETRY_WATCHDOG": "0",
-        // Avoid replaying partial streaming work via a non-streaming fallback.
-        // Native model selection may still probe a missing model twice.
-        "CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK": "1",
-        "CLAUDE_CODE_USE_BEDROCK": "0",
-        "CLAUDE_CODE_USE_VERTEX": "0",
-        "CLAUDE_CODE_USE_FOUNDRY": "0",
-        "CLAUDE_CODE_USE_ANTHROPIC_AWS": "0",
-        "ANTHROPIC_BEDROCK_BASE_URL": "",
-        "ANTHROPIC_VERTEX_BASE_URL": ""
-    });
-    let mut options = json!({
-        "env": env,
-        // Claude loads settings after subprocess env. Both public SDK tiers
-        // must carry the selected route so user/project settings cannot replace it.
-        "settings": {"apiKeyHelper": "", "env": env}
-    });
-    if let Some(model) = route
-        .model
-        .as_deref()
-        .map(str::trim)
-        .filter(|model| !model.is_empty())
-    {
-        options["model"] = json!(model);
-    }
-    Ok(Some(Map::from_iter([(
-        "claudeCode".into(),
-        json!({"options": options}),
-    )])))
-}
-
-/// Restore authentication without pinning the SDK to a new-session default.
-/// The upstream transcript owns the historical session's selected model.
-pub(crate) fn restored_metadata(
-    route: Option<&GatewaySignIn>,
-) -> Result<Option<Map<String, Value>>, String> {
-    let mut meta = metadata(route)?;
-    if let Some(options) = meta
-        .as_mut()
-        .and_then(|meta| meta.get_mut("claudeCode"))
-        .and_then(|claude| claude.get_mut("options"))
-        .and_then(Value::as_object_mut)
-    {
-        options.remove("model");
-    }
-    Ok(meta)
-}
diff --git a/rust/lithe-agent-host/src/skills.rs b/rust/lithe-agent-host/src/skills.rs
deleted file mode 100644
index 2b7ba6f5..00000000
--- a/rust/lithe-agent-host/src/skills.rs
+++ /dev/null
@@ -1,296 +0,0 @@
-//! Native Agent skill discovery and explicit user-owned skill installation.
-//!
-//! Codex owns discovery through skills/list. Claude's directory inventory is
-//! deliberately not advertised as a complete or enabled session capability list.
-//! Explicit toggles use native settings; discovery never changes configuration.
-
-mod files;
-mod settings;
-#[cfg(test)]
-mod tests;
-
-use crate::{codex_history::CodexHistory, environment};
-use serde::{Deserialize, Serialize};
-use serde_json::{json, Value};
-use std::path::{Path, PathBuf};
-
-/// Explicit settings action. Reading a list never installs or enables a skill.
-#[derive(Debug, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct Request {
-    pub action: Action,
-    pub agent_id: String,
-    /// Current opened project, or None for user-only settings.
-    pub workspace: Option<PathBuf>,
-    pub scope: Option<String>,
-    pub name: Option<String>,
-    pub description: Option<String>,
-    pub instructions: Option<String>,
-    /// User-selected SKILL.md or a directory containing it; never an archive or URL.
-    pub source: Option<PathBuf>,
-    /// Desired native visibility; required only for setEnabled.
-    pub enabled: Option<bool>,
-    /// Selected Codex account directory (`CODEX_HOME`); None uses the default account.
-    pub codex_home: Option<PathBuf>,
-    /// Selected Claude account directory (`CLAUDE_CONFIG_DIR`); None uses the environment or default.
-    pub claude_config_dir: Option<PathBuf>,
-}
-
-/// Mutations require an explicit settings action, never a discovery request.
-#[derive(Debug, Deserialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-pub enum Action {
-    List,
-    Directories,
-    Read,
-    Create,
-    Import,
-    SetEnabled,
-}
-
-/// A native path is transient platform metadata, not a persistent shared identifier.
-#[derive(Debug, Serialize, PartialEq, Eq)]
-#[serde(rename_all = "camelCase")]
-struct Skill {
-    name: String,
-    description: String,
-    path: PathBuf,
-    scope: String,
-    /// Native Codex state, or Claude's configured visibility in this scope.
-    /// None means configuration could not be read, never an inferred default.
-    enabled: Option<bool>,
-    plugin_id: Option<String>,
-}
-
-#[derive(Debug, Serialize)]
-#[serde(rename_all = "camelCase")]
-struct Listing {
-    skills: Vec<Skill>,
-    /// "agent" means native discovery; "directory" means an explicitly partial inventory.
-    source: &'static str,
-    issues: Vec<String>,
-    directories: std::collections::BTreeMap<String, PathBuf>,
-}
-
-/// Failures retain a stable category without returning raw subprocess output.
-#[derive(Debug)]
-pub enum Error {
-    Invalid(String),
-    Failed(String),
-    MissingCLI,
-    Cancelled,
-}
-
-impl Error {
-    pub fn message(&self) -> &str {
-        match self {
-            Self::Invalid(message) | Self::Failed(message) => message,
-            Self::MissingCLI => "Install Codex CLI to discover its skills.",
-            Self::Cancelled => "Skill operation was cancelled.",
-        }
-    }
-}
-
-/// Run on a platform worker. The caller owns cancellation and the current workspace.
-pub fn execute(request: Request, cancelled: &dyn Fn() -> bool) -> Result<Value, Error> {
-    let home = std::env::var_os(if cfg!(windows) { "USERPROFILE" } else { "HOME" })
-        .map(PathBuf::from)
-        .filter(|p| p.is_absolute())
-        .ok_or_else(|| Error::Failed("The user home directory is unavailable.".into()))?;
-    let claude = request
-        .claude_config_dir
-        .clone()
-        .or_else(|| std::env::var_os("CLAUDE_CONFIG_DIR").map(PathBuf::from))
-        .unwrap_or_else(|| home.join(".claude"));
-    execute_at(request, &home, &claude, cancelled)
-}
-
-fn execute_at(
-    request: Request,
-    home: &Path,
-    claude: &Path,
-    cancelled: &dyn Fn() -> bool,
-) -> Result<Value, Error> {
-    check(cancelled)?;
-    if !matches!(request.agent_id.as_str(), "codex-acp" | "claude-acp") {
-        return Err(Error::Invalid(
-            "Skill management is available for Codex and Claude.".into(),
-        ));
-    }
-    if request
-        .workspace
-        .as_ref()
-        .is_some_and(|p| !p.is_absolute() || !p.is_dir())
-        || !claude.is_absolute()
-        || request
-            .codex_home
-            .as_ref()
-            .is_some_and(|p| !p.is_absolute())
-    {
-        return Err(Error::Invalid(
-            "The skill workspace and configuration directory must be absolute directories.".into(),
-        ));
-    }
-    if request.action == Action::Directories {
-        return Ok(json!({"directories": files::directories(&request, home, claude)}));
-    }
-    if request.action == Action::Read {
-        let path = request
-            .source
-            .as_deref()
-            .filter(|p| p.is_absolute())
-            .ok_or_else(|| Error::Invalid("Choose a skill document.".into()))?;
-        return files::read_document(path).map(|content| json!({"content": content}));
-    }
-    if request.action == Action::SetEnabled {
-        return settings::set_enabled(&request, home, claude, cancelled);
-    }
-    if request.action != Action::List {
-        return files::install(&request, home, claude, cancelled).map(|path| json!({"path": path}));
-    }
-    let mut listing = if request.agent_id == "codex-acp" {
-        let cli = environment::detect_tool("codex", cancelled).ok_or(Error::MissingCLI)?;
-        check(cancelled)?;
-        let cwd = request.workspace.as_deref().unwrap_or(home);
-        let runtime = tokio::runtime::Builder::new_current_thread()
-            .enable_all()
-            .build()
-            .map_err(|_| Error::Failed("Skill discovery could not start.".into()))?;
-        let result = runtime.block_on(CodexHistory::skills(
-            cli.path,
-            cwd.to_path_buf(),
-            request.codex_home.clone(),
-            cancelled,
-        ));
-        check(cancelled)?;
-        let value = result.map_err(|_| {
-            Error::Failed("Codex skill discovery failed. Check the CLI and retry.".into())
-        })?;
-        parse_codex(&value, cwd)?
-    } else {
-        files::claude_inventory(request.workspace.as_deref(), claude, cancelled)?
-    };
-    if request.agent_id == "claude-acp" {
-        settings::annotate(&mut listing, request.workspace.as_deref(), claude);
-    }
-    check(cancelled)?;
-    listing_value(listing, &request, home, claude)
-}
-
-fn listing_value(
-    mut listing: Listing,
-    request: &Request,
-    home: &Path,
-    claude: &Path,
-) -> Result<Value, Error> {
-    listing.directories = files::directories(request, home, claude);
-    listing.skills.sort_by(|a, b| {
-        a.name
-            .to_lowercase()
-            .cmp(&b.name.to_lowercase())
-            .then(a.path.cmp(&b.path))
-    });
-    serde_json::to_value(listing)
-        .map_err(|_| Error::Failed("Skill metadata could not be returned.".into()))
-}
-
-fn check(cancelled: &dyn Fn() -> bool) -> Result<(), Error> {
-    if cancelled() {
-        Err(Error::Cancelled)
-    } else {
-        Ok(())
-    }
-}
-
-fn parse_codex(value: &Value, cwd: &Path) -> Result<Listing, Error> {
-    let entries = value["data"]
-        .as_array()
-        .ok_or_else(|| Error::Failed("Codex returned invalid skill metadata.".into()))?;
-    let entry = entries
-        .iter()
-        .find(|entry| {
-            entry["cwd"].as_str().is_some_and(|path| {
-                Path::new(path) == cwd
-                    || std::fs::canonicalize(path)
-                        .ok()
-                        .zip(std::fs::canonicalize(cwd).ok())
-                        .is_some_and(|(a, b)| a == b)
-            })
-        })
-        .ok_or_else(|| {
-            Error::Failed("Codex did not report skills for the selected project.".into())
-        })?;
-    let rows = entry["skills"]
-        .as_array()
-        .ok_or_else(|| Error::Failed("Codex returned invalid skill metadata.".into()))?;
-    if rows.len() > files::MAX_ENTRIES {
-        return Err(Error::Failed("Too many skills to display.".into()));
-    }
-    let mut listing = Listing {
-        skills: vec![],
-        source: "agent",
-        issues: vec![],
-        directories: Default::default(),
-    };
-    for row in rows {
-        let path = row["path"].as_str().map(PathBuf::from);
-        match (row["name"].as_str(), row["description"].as_str(), path) {
-            (Some(name), Some(description), Some(path))
-                if path.is_absolute() && !name.is_empty() =>
-            {
-                if !matches!(
-                    row["scope"].as_str(),
-                    Some("user" | "repo" | "system" | "admin")
-                ) {
-                    listing
-                        .issues
-                        .push("A skill has an unknown scope and cannot be classified.".into());
-                    continue;
-                }
-                if listing.skills.iter().any(|skill| skill.path == path) {
-                    continue;
-                }
-                listing.skills.push(Skill {
-                    name: name.into(),
-                    description: description.into(),
-                    path,
-                    scope: row["scope"].as_str().unwrap_or("unknown").into(),
-                    enabled: row["enabled"].as_bool(),
-                    plugin_id: row["pluginId"].as_str().map(str::to_owned),
-                });
-            }
-            _ => listing
-                .issues
-                .push("A skill was omitted because its native metadata is incomplete.".into()),
-        }
-    }
-    if entry["errors"]
-        .as_array()
-        .is_some_and(|errors| !errors.is_empty())
-    {
-        listing.issues.push(
-            "Codex reported skill discovery errors. Check the affected SKILL.md files and refresh."
-                .into(),
-        );
-    }
-    Ok(listing)
-}
-
-/// Restrict config writes to a path that this workspace's native discovery reports.
-pub(crate) fn codex_skill_path(value: &Value, cwd: &Path, path: &Path) -> Option<PathBuf> {
-    parse_codex(value, cwd).ok().and_then(|listing| {
-        listing
-            .skills
-            .into_iter()
-            .find(|skill| same_path(&skill.path, path) && skill.enabled.is_some())
-            .map(|skill| skill.path)
-    })
-}
-
-fn same_path(left: &Path, right: &Path) -> bool {
-    left == right
-        || std::fs::canonicalize(left)
-            .ok()
-            .zip(std::fs::canonicalize(right).ok())
-            .is_some_and(|(left, right)| left == right)
-}
diff --git a/rust/lithe-agent-host/src/skills/files.rs b/rust/lithe-agent-host/src/skills/files.rs
deleted file mode 100644
index 755e4c1b..00000000
--- a/rust/lithe-agent-host/src/skills/files.rs
+++ /dev/null
@@ -1,529 +0,0 @@
-//! Bounded directory inventory and non-overwriting publication in native user/project roots.
-
-use super::*;
-use std::fs::{self, File, OpenOptions};
-use std::io::{Read, Write};
-
-pub(super) const MAX_ENTRIES: usize = 2_000;
-const MAX_FILE_BYTES: u64 = 8 * 1024 * 1024;
-const MAX_DOCUMENT_BYTES: u64 = 128 * 1024;
-const MAX_IMPORT_BYTES: u64 = 32 * 1024 * 1024;
-const MAX_DEPTH: usize = 20;
-
-fn failure(message: &str) -> Error {
-    Error::Failed(message.into())
-}
-
-fn read(path: &Path) -> Result<Vec<u8>, Error> {
-    read_limited(path, MAX_FILE_BYTES)
-}
-
-fn read_limited(path: &Path, limit: u64) -> Result<Vec<u8>, Error> {
-    let mut options = OpenOptions::new();
-    options.read(true);
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::OpenOptionsExt;
-        options.custom_flags(libc::O_NOFOLLOW | libc::O_NONBLOCK);
-    }
-    let file = options
-        .open(path)
-        .map_err(|_| failure("The skill file could not be opened."))?;
-    if !file
-        .metadata()
-        .map_err(|_| failure("The skill file could not be inspected."))?
-        .is_file()
-    {
-        return Err(failure("Skills must contain regular files."));
-    }
-    let mut bytes = Vec::new();
-    file.take(limit + 1)
-        .read_to_end(&mut bytes)
-        .map_err(|_| failure("The skill file could not be read."))?;
-    if bytes.len() as u64 > limit {
-        return Err(failure(if limit == MAX_DOCUMENT_BYTES {
-            "SKILL.md exceeds the 128 KiB limit."
-        } else {
-            "A skill file exceeds the 8 MiB limit."
-        }));
-    }
-    Ok(bytes)
-}
-
-pub(super) fn metadata(bytes: &[u8], fallback: &str) -> Result<(String, String), Error> {
-    let text = std::str::from_utf8(bytes).map_err(|_| failure("SKILL.md must use UTF-8 text."))?;
-    let mut lines = text.trim_start_matches('\u{feff}').lines();
-    if lines.next().map(str::trim) != Some("---") {
-        return Err(failure("SKILL.md needs YAML frontmatter."));
-    }
-    let mut yaml = String::new();
-    let mut closed = false;
-    for line in lines.by_ref() {
-        if line.trim() == "---" {
-            closed = true;
-            break;
-        }
-        yaml.push_str(line);
-        yaml.push('\n');
-    }
-    if !closed {
-        return Err(failure("SKILL.md frontmatter is not closed."));
-    }
-    if !lines.any(|line| !line.trim().is_empty()) {
-        return Err(failure(
-            "SKILL.md needs instructions after its frontmatter.",
-        ));
-    }
-    let value: serde_yaml_ng::Value = serde_yaml_ng::from_str(&yaml)
-        .map_err(|_| failure("SKILL.md has invalid YAML frontmatter."))?;
-    let name = value["name"].as_str().unwrap_or(fallback).trim();
-    let description = value["description"].as_str().unwrap_or("").trim();
-    if name.is_empty() || description.is_empty() {
-        return Err(failure("SKILL.md needs a name and description."));
-    }
-    Ok((name.into(), description.into()))
-}
-
-/// Inventory only these two explicit locations. Do not emulate Claude's policy,
-/// plugin resolution, ancestor discovery or lazy nested skill loading.
-pub(super) fn claude_inventory(
-    workspace: Option<&Path>,
-    claude: &Path,
-    cancelled: &dyn Fn() -> bool,
-) -> Result<Listing, Error> {
-    let mut result = Listing {
-        source: "directory",
-        skills: vec![],
-        issues: vec![],
-        directories: Default::default(),
-    };
-    let mut roots = vec![(claude.join("skills"), "user")];
-    if let Some(workspace) = workspace {
-        roots.push((workspace.join(".claude/skills"), "repo"));
-    }
-    let mut inspected = 0usize;
-    'roots: for (root, scope) in roots {
-        check(cancelled)?;
-        let entries = match fs::read_dir(&root) {
-            Ok(entries) => entries,
-            Err(error) if error.kind() == std::io::ErrorKind::NotFound => continue,
-            Err(_) => {
-                result
-                    .issues
-                    .push(format!("Cannot read {}", root.display()));
-                continue;
-            }
-        };
-        for entry in entries {
-            check(cancelled)?;
-            inspected += 1;
-            if inspected > MAX_ENTRIES {
-                result
-                    .issues
-                    .push("Only the first 2000 directory entries were inspected.".into());
-                break 'roots;
-            }
-            let entry = match entry {
-                Ok(entry) => entry,
-                Err(_) => {
-                    result
-                        .issues
-                        .push("A skill directory could not be read.".into());
-                    continue;
-                }
-            };
-            if entry.file_name().to_string_lossy().starts_with('.') {
-                continue;
-            }
-            let path = entry.path().join("SKILL.md");
-            if !path.exists() {
-                continue;
-            }
-            // A native skill directory may be a link. Resolve only for reading;
-            // importing links or writing through linked destinations is forbidden.
-            let parsed = fs::canonicalize(&path)
-                .map_err(|_| failure("A skill path could not be resolved."))
-                .and_then(|canonical| read_limited(&canonical, MAX_DOCUMENT_BYTES))
-                .and_then(|bytes| metadata(&bytes, &entry.file_name().to_string_lossy()));
-            match parsed {
-                Ok((name, description)) => result.skills.push(Skill {
-                    name,
-                    description,
-                    path,
-                    scope: scope.into(),
-                    enabled: None,
-                    plugin_id: None,
-                }),
-                Err(error) => {
-                    result
-                        .issues
-                        .push(format!("{}: {}", path.display(), error.message()))
-                }
-            }
-        }
-    }
-    Ok(result)
-}
-
-fn valid_name(name: &str) -> bool {
-    !name.is_empty()
-        && name.len() <= 64
-        && name.split('-').all(|part| {
-            !part.is_empty()
-                && part
-                    .bytes()
-                    .all(|b| b.is_ascii_lowercase() || b.is_ascii_digit())
-        })
-}
-
-/// Create native containers without following a linked intermediate directory.
-fn destination(request: &Request, home: &Path, claude: &Path) -> Result<PathBuf, Error> {
-    let project = request.scope.as_deref() == Some("repo");
-    if !matches!(request.scope.as_deref(), Some("user" | "repo")) {
-        return Err(Error::Invalid(
-            "Choose Global or Project for the skill.".into(),
-        ));
-    }
-    let (base, components) = if project {
-        (
-            request.workspace.as_deref().ok_or_else(|| {
-                Error::Invalid("Open a project before creating project skills.".into())
-            })?,
-            vec![
-                if request.agent_id == "codex-acp" {
-                    ".agents"
-                } else {
-                    ".claude"
-                },
-                "skills",
-            ],
-        )
-    } else if request.agent_id == "codex-acp" {
-        (home, vec![".agents", "skills"])
-    } else {
-        // CLAUDE_CONFIG_DIR is the user's native configuration override.
-        fs::create_dir_all(claude)
-            .map_err(|_| failure("The Claude configuration directory could not be created."))?;
-        (claude, vec!["skills"])
-    };
-    let mut path =
-        fs::canonicalize(base).map_err(|_| failure("The skill destination is unavailable."))?;
-    for component in components {
-        path.push(component);
-        match fs::create_dir(&path) {
-            Ok(()) => {}
-            Err(error) if error.kind() == std::io::ErrorKind::AlreadyExists => {}
-            Err(_) => return Err(failure("The skill destination could not be created.")),
-        }
-        let metadata = fs::symlink_metadata(&path)
-            .map_err(|_| failure("The skill destination could not be inspected."))?;
-        if !metadata.is_dir() || metadata.file_type().is_symlink() {
-            return Err(failure("The skill destination contains a symbolic link or non-directory. Choose a regular native skill directory."));
-        }
-    }
-    Ok(path)
-}
-
-struct Staging(PathBuf);
-impl Drop for Staging {
-    fn drop(&mut self) {
-        if let Err(error) = fs::remove_dir_all(&self.0) {
-            // log-exempt: 预期的缺失：暂存清理对象已不存在，没有仍需删除的文件或目录。
-            if error.kind() != std::io::ErrorKind::NotFound {
-                crate::failure_log::failed(
-                    "agent.skills.cleanup_failed",
-                    "install",
-                    &format!("{:?}", error.kind()),
-                    "io",
-                );
-            }
-        }
-    }
-}
-
-pub(super) fn install(
-    request: &Request,
-    home: &Path,
-    claude: &Path,
-    cancelled: &dyn Fn() -> bool,
-) -> Result<PathBuf, Error> {
-    let (name, content, source) = match request.action {
-        Action::Create => {
-            let name = request.name.as_deref().unwrap_or("");
-            let description = request.description.as_deref().unwrap_or("").trim();
-            let instructions = request.instructions.as_deref().unwrap_or("").trim();
-            if description.is_empty() || instructions.is_empty() {
-                return Err(Error::Invalid(
-                    "Enter a description and instructions.".into(),
-                ));
-            }
-            // JSON strings are valid YAML scalars, preserving quotes and newlines.
-            let text = format!(
-                "---\nname: {}\ndescription: {}\n---\n\n{}\n",
-                json!(name),
-                json!(description),
-                instructions
-            );
-            if text.len() as u64 > MAX_DOCUMENT_BYTES {
-                return Err(Error::Invalid("The skill is too large.".into()));
-            }
-            (name.to_owned(), Some(text.into_bytes()), None)
-        }
-        Action::Import => {
-            let source = request
-                .source
-                .as_deref()
-                .filter(|p| p.is_absolute())
-                .ok_or_else(|| {
-                    Error::Invalid("Choose a SKILL.md file or skill directory.".into())
-                })?;
-            let info = fs::symlink_metadata(source)
-                .map_err(|_| failure("The import source is unavailable."))?;
-            if info.file_type().is_symlink() {
-                return Err(failure(
-                    "Import a regular file or directory instead of a symbolic link.",
-                ));
-            }
-            let file = if info.is_dir() {
-                source.join("SKILL.md")
-            } else {
-                source.to_path_buf()
-            };
-            if file.file_name().and_then(|v| v.to_str()) != Some("SKILL.md") {
-                return Err(Error::Invalid(
-                    "Select SKILL.md or its containing directory.".into(),
-                ));
-            }
-            let bytes = read_limited(&file, MAX_DOCUMENT_BYTES)?;
-            let fallback = if info.is_dir() {
-                source.file_name().and_then(|v| v.to_str()).unwrap_or("")
-            } else {
-                ""
-            };
-            let (name, _) = metadata(&bytes, fallback)?;
-            if request.agent_id == "codex-acp" {
-                // Codex requires an explicit frontmatter name, unlike Claude's directory fallback.
-                let (explicit, _) = metadata(&bytes, "")?;
-                if explicit.is_empty() {
-                    return Err(failure("Codex requires a skill name."));
-                }
-            }
-            (
-                name,
-                Some(bytes),
-                info.is_dir().then(|| source.to_path_buf()),
-            )
-        }
-        Action::List | Action::Read | Action::Directories | Action::SetEnabled => unreachable!(),
-    };
-    if !valid_name(&name) {
-        return Err(Error::Invalid(
-            "Use up to 64 lowercase letters, digits and single hyphens for the skill name.".into(),
-        ));
-    }
-    if request.agent_id == "claude-acp" && matches!(name.as_str(), "synced" | "anthropic-skills") {
-        return Err(Error::Invalid(
-            "That skill name is reserved by Claude. Choose a different name.".into(),
-        ));
-    }
-    check(cancelled)?;
-    let root = destination(request, home, claude)?;
-    if source
-        .as_ref()
-        .and_then(|source| fs::canonicalize(source).ok())
-        .is_some_and(|source| root.starts_with(source))
-    {
-        return Err(Error::Invalid(
-            "The import source cannot contain the destination directory.".into(),
-        ));
-    }
-    let target = root.join(&name);
-    if target.symlink_metadata().is_ok() {
-        return Err(failure("A skill with this directory name already exists. Existing skills are never overwritten."));
-    }
-    let staging = Staging(root.join(format!(".lithe-skill-{}", uuid::Uuid::new_v4())));
-    fs::create_dir(&staging.0)
-        .map_err(|_| failure("The skill staging directory could not be created."))?;
-    if let Some(source) = source {
-        let mut budget = Budget {
-            entries: 0,
-            bytes: 0,
-        };
-        copy_directory(&source, &staging.0, 0, &mut budget, cancelled)?;
-        // Validate the actual staged bytes, including concurrent source changes.
-        let (staged_name, _) = metadata(
-            &read_limited(&staging.0.join("SKILL.md"), MAX_DOCUMENT_BYTES)?,
-            &name,
-        )?;
-        if staged_name != name {
-            return Err(failure(
-                "SKILL.md changed while it was being imported. Retry the import.",
-            ));
-        }
-    } else if let Some(content) = content {
-        let mut file = File::create(staging.0.join("SKILL.md"))
-            .map_err(|_| failure("SKILL.md could not be created."))?;
-        file.write_all(&content)
-            .map_err(|_| failure("SKILL.md could not be saved."))?;
-    }
-    check(cancelled)?;
-    publish(&staging.0, &target)?;
-    Ok(target.join("SKILL.md"))
-}
-
-struct Budget {
-    entries: usize,
-    bytes: u64,
-}
-fn copy_directory(
-    source: &Path,
-    destination: &Path,
-    depth: usize,
-    budget: &mut Budget,
-    cancelled: &dyn Fn() -> bool,
-) -> Result<(), Error> {
-    if depth > MAX_DEPTH {
-        return Err(failure("The skill directory is too deeply nested."));
-    }
-    let entries =
-        fs::read_dir(source).map_err(|_| failure("The skill directory could not be read."))?;
-    for entry in entries {
-        check(cancelled)?;
-        let entry = entry.map_err(|_| failure("A skill entry could not be read."))?;
-        budget.entries += 1;
-        if budget.entries > MAX_ENTRIES {
-            return Err(failure("The skill contains too many files."));
-        }
-        let kind = entry
-            .file_type()
-            .map_err(|_| failure("A skill entry could not be inspected."))?;
-        let path = destination.join(entry.file_name());
-        if kind.is_dir() {
-            fs::create_dir(&path).map_err(|_| failure("A skill directory could not be copied."))?;
-            copy_directory(&entry.path(), &path, depth + 1, budget, cancelled)?;
-        } else if kind.is_file() {
-            let bytes = read(&entry.path())?;
-            budget.bytes += bytes.len() as u64;
-            if budget.bytes > MAX_IMPORT_BYTES {
-                return Err(failure("The skill exceeds the 32 MiB import limit."));
-            }
-            fs::write(&path, bytes).map_err(|_| failure("A skill file could not be copied."))?;
-            let permissions = entry
-                .metadata()
-                .map_err(|_| failure("Skill permissions could not be read."))?
-                .permissions();
-            fs::set_permissions(&path, permissions)
-                .map_err(|_| failure("Skill permissions could not be preserved."))?;
-        } else {
-            return Err(failure(
-                "Skill imports cannot contain symbolic links or special files.",
-            ));
-        }
-    }
-    Ok(())
-}
-
-/// Atomic no-replace publication closes the existence-check race with another window.
-pub(super) fn publish(source: &Path, target: &Path) -> Result<(), Error> {
-    #[cfg(any(target_os = "macos", target_os = "linux"))]
-    {
-        use std::ffi::CString;
-        use std::os::unix::ffi::OsStrExt;
-        let from = CString::new(source.as_os_str().as_bytes())
-            .map_err(|_| failure("Invalid skill path."))?;
-        let to = CString::new(target.as_os_str().as_bytes())
-            .map_err(|_| failure("Invalid skill path."))?;
-        #[cfg(target_os = "macos")]
-        // SAFETY: both C strings remain alive for the call; flags refuse replacement.
-        let result = unsafe {
-            libc::renameatx_np(
-                libc::AT_FDCWD,
-                from.as_ptr(),
-                libc::AT_FDCWD,
-                to.as_ptr(),
-                libc::RENAME_EXCL,
-            )
-        };
-        #[cfg(target_os = "linux")]
-        // SAFETY: both C strings remain alive for the call; flags refuse replacement.
-        let result = unsafe {
-            libc::renameat2(
-                libc::AT_FDCWD,
-                from.as_ptr(),
-                libc::AT_FDCWD,
-                to.as_ptr(),
-                libc::RENAME_NOREPLACE,
-            )
-        };
-        if result != 0 {
-            return Err(failure(
-                "The skill could not be published. Check permissions and existing skill names.",
-            ));
-        }
-        Ok(())
-    }
-    #[cfg(windows)]
-    {
-        use std::os::windows::ffi::OsStrExt;
-        use windows_sys::Win32::Storage::FileSystem::{MoveFileExW, MOVEFILE_WRITE_THROUGH};
-        let from: Vec<u16> = source.as_os_str().encode_wide().chain(Some(0)).collect();
-        let to: Vec<u16> = target.as_os_str().encode_wide().chain(Some(0)).collect();
-        if from[..from.len() - 1].contains(&0) || to[..to.len() - 1].contains(&0) {
-            return Err(failure("Invalid skill path."));
-        }
-        // std::fs::rename can replace empty directories via FileRenameInfoEx.
-        // Omit REPLACE_EXISTING and COPY_ALLOWED: publication must stay an
-        // exclusive same-volume move, including when another writer races us.
-        // SAFETY: both terminated UTF-16 buffers stay alive throughout the call.
-        if unsafe { MoveFileExW(from.as_ptr(), to.as_ptr(), MOVEFILE_WRITE_THROUGH) } == 0 {
-            return Err(failure(
-                "The skill could not be published. Check permissions and existing skill names.",
-            ));
-        }
-        Ok(())
-    }
-    #[cfg(not(any(target_os = "macos", target_os = "linux", windows)))]
-    Err(failure(
-        "Atomic skill publication is unavailable on this platform.",
-    ))
-}
-
-/// Native destinations are returned as display metadata; discovery creates no directories.
-pub(super) fn directories(
-    request: &Request,
-    home: &Path,
-    claude: &Path,
-) -> std::collections::BTreeMap<String, PathBuf> {
-    let mut directories = std::collections::BTreeMap::new();
-    directories.insert(
-        "user".into(),
-        if request.agent_id == "codex-acp" {
-            home.join(".agents/skills")
-        } else {
-            claude.join("skills")
-        },
-    );
-    if let Some(workspace) = &request.workspace {
-        directories.insert(
-            "repo".into(),
-            workspace.join(if request.agent_id == "codex-acp" {
-                ".agents/skills"
-            } else {
-                ".claude/skills"
-            }),
-        );
-    }
-    directories
-}
-
-pub(super) fn read_document(path: &Path) -> Result<String, Error> {
-    if path.file_name().and_then(|name| name.to_str()) != Some("SKILL.md") {
-        return Err(Error::Invalid(
-            "Select SKILL.md or its containing directory.".into(),
-        ));
-    }
-    let canonical = fs::canonicalize(path)
-        .map_err(|_| failure("The skill document is unavailable. Refresh and retry."))?;
-    String::from_utf8(read_limited(&canonical, MAX_DOCUMENT_BYTES)?)
-        .map_err(|_| failure("SKILL.md must use UTF-8 text."))
-}
diff --git a/rust/lithe-agent-host/src/skills/settings.rs b/rust/lithe-agent-host/src/skills/settings.rs
deleted file mode 100644
index ed926c98..00000000
--- a/rust/lithe-agent-host/src/skills/settings.rs
+++ /dev/null
@@ -1,307 +0,0 @@
-//! Native visibility settings. Never move skill packages or keep a Lithe enabled flag.
-
-use super::*;
-use fs2::FileExt;
-use std::fs::{self, OpenOptions};
-use std::io::{Read, Write};
-
-const MAX_SETTINGS_BYTES: u64 = 1024 * 1024;
-
-fn failed() -> Error {
-    Error::Failed(
-        "Skill settings could not be updated. Check the settings file and refresh.".into(),
-    )
-}
-
-/// These are configured states, not a reconstruction of Claude's effective
-/// managed/ancestor/session policy. Project-local overrides take precedence.
-pub(super) fn annotate(listing: &mut Listing, workspace: Option<&Path>, claude: &Path) {
-    let user = load(&claude.join("settings.json"));
-    let project = workspace
-        .map(|root| {
-            Ok::<_, Error>((
-                load(&root.join(".claude/settings.json"))?,
-                load(&root.join(".claude/settings.local.json"))?,
-            ))
-        })
-        .transpose();
-    for skill in &mut listing.skills {
-        skill.enabled = user.as_ref().ok().and_then(|user| {
-            let mut state = visibility(user, &skill.name)?;
-            if skill.scope == "repo" {
-                if let Some((shared, local)) = project.as_ref().ok()?.as_ref() {
-                    state = override_visibility(shared, &skill.name)?.unwrap_or(state);
-                    state = override_visibility(local, &skill.name)?.unwrap_or(state);
-                }
-            }
-            Some(state)
-        });
-    }
-    if user.is_err() || project.is_err() {
-        listing.issues.push("Claude skill settings could not be read. Fix invalid settings and refresh before toggling.".into());
-    }
-}
-
-fn override_visibility(value: &Value, name: &str) -> Option<Option<bool>> {
-    match value
-        .get("skillOverrides")
-        .and_then(|values| values.get(name))
-        .and_then(Value::as_str)
-    {
-        None => Some(None),
-        Some("off") => Some(Some(false)),
-        Some("on" | "name-only" | "user-invocable-only") => Some(Some(true)),
-        Some(_) => None,
-    }
-}
-
-fn visibility(value: &Value, name: &str) -> Option<bool> {
-    Some(override_visibility(value, name)?.unwrap_or(true))
-}
-
-pub(super) fn set_enabled(
-    request: &Request,
-    home: &Path,
-    claude: &Path,
-    cancelled: &dyn Fn() -> bool,
-) -> Result<Value, Error> {
-    let enabled = request
-        .enabled
-        .ok_or_else(|| Error::Invalid("Choose whether to enable the skill.".into()))?;
-    let path = request
-        .source
-        .as_deref()
-        .filter(|path| path.is_absolute())
-        .ok_or_else(|| Error::Invalid("Choose a skill document.".into()))?;
-    if request.agent_id == "codex-acp" {
-        let cli = environment::detect_tool("codex", cancelled).ok_or(Error::MissingCLI)?;
-        check(cancelled)?;
-        let cwd = request.workspace.as_deref().unwrap_or(home);
-        let runtime = tokio::runtime::Builder::new_current_thread()
-            .enable_all()
-            .build()
-            .map_err(|_| failed())?;
-        let value = runtime.block_on(CodexHistory::set_skill_enabled(
-            cli.path,
-            cwd.to_owned(),
-            path.to_owned(),
-            enabled,
-            request.codex_home.clone(),
-            cancelled,
-        ));
-        check(cancelled)?;
-        let listing = parse_codex(&value.map_err(|_| Error::Failed("Codex skill settings could not be confirmed. Refresh to check the current state.".into()))?, cwd)?;
-        if !listing
-            .skills
-            .iter()
-            .any(|skill| same_path(&skill.path, path) && skill.enabled == Some(enabled))
-        {
-            return Err(Error::Failed("The Agent did not apply the skill setting. Refresh and check project or managed configuration.".into()));
-        }
-        return listing_value(listing, request, home, claude);
-    }
-    let mut listing = files::claude_inventory(request.workspace.as_deref(), claude, cancelled)?;
-    let discovery_issue_count = listing.issues.len();
-    annotate(&mut listing, request.workspace.as_deref(), claude);
-    let skill = listing
-        .skills
-        .iter()
-        .find(|skill| {
-            same_path(&skill.path, path) && Some(skill.scope.as_str()) == request.scope.as_deref()
-        })
-        .ok_or_else(|| {
-            Error::Invalid(
-                "The skill is no longer available in this scope. Refresh and retry.".into(),
-            )
-        })?;
-    if skill.enabled.is_none() {
-        return Err(failed());
-    }
-    // SkillOverrides keys are names. Duplicate names in the same scope share one setting.
-    if skill.name.contains(':') {
-        return Err(Error::Invalid(
-            "Claude plugin skills must be managed through Claude's plugin settings.".into(),
-        ));
-    }
-    let target = if skill.scope == "repo" {
-        request
-            .workspace
-            .as_ref()
-            .ok_or_else(failed)?
-            .join(".claude/settings.local.json")
-    } else {
-        claude.join("settings.json")
-    };
-    write_override(&target, &skill.name, enabled, cancelled)?;
-    listing.issues.truncate(discovery_issue_count);
-    annotate(&mut listing, request.workspace.as_deref(), claude);
-    if !listing
-        .skills
-        .iter()
-        .any(|skill| same_path(&skill.path, path) && skill.enabled == Some(enabled))
-    {
-        return Err(Error::Failed("The Agent did not apply the skill setting. Refresh and check project or managed configuration.".into()));
-    }
-    listing_value(listing, request, home, claude)
-}
-
-fn options() -> OpenOptions {
-    // Only the Unix branch mutates the options; silence unused_mut on Windows builds.
-    #[allow(unused_mut)]
-    let mut options = OpenOptions::new();
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::OpenOptionsExt;
-        options
-            .custom_flags(libc::O_NOFOLLOW | libc::O_NONBLOCK)
-            .mode(0o600);
-    }
-    options
-}
-
-fn snapshot(path: &Path) -> Result<Option<Vec<u8>>, Error> {
-    let file = match options().read(true).open(path) {
-        Ok(file) => file,
-        Err(error) if error.kind() == std::io::ErrorKind::NotFound => return Ok(None),
-        Err(_) => return Err(failed()),
-    };
-    if !file.metadata().map_err(|_| failed())?.is_file()
-        || fs::symlink_metadata(path)
-            .map_err(|_| failed())?
-            .file_type()
-            .is_symlink()
-    {
-        return Err(failed());
-    }
-    let mut bytes = vec![];
-    file.take(MAX_SETTINGS_BYTES + 1)
-        .read_to_end(&mut bytes)
-        .map_err(|_| failed())?;
-    if bytes.len() as u64 > MAX_SETTINGS_BYTES {
-        return Err(failed());
-    }
-    Ok(Some(bytes))
-}
-
-fn parse(bytes: Option<&[u8]>) -> Result<Value, Error> {
-    let value: Value = match bytes {
-        Some(bytes) => serde_json::from_slice(bytes).map_err(|_| failed())?,
-        None => json!({}),
-    };
-    if !value.is_object() {
-        return Err(failed());
-    }
-    if let Some(overrides) = value.get("skillOverrides") {
-        if !overrides.is_object()
-            || !overrides.as_object().unwrap().values().all(|value| {
-                matches!(
-                    value.as_str(),
-                    Some("on" | "off" | "name-only" | "user-invocable-only")
-                )
-            })
-        {
-            return Err(failed());
-        }
-    }
-    Ok(value)
-}
-
-fn load(path: &Path) -> Result<Value, Error> {
-    parse(snapshot(path)?.as_deref())
-}
-
-struct Temporary(PathBuf);
-impl Drop for Temporary {
-    fn drop(&mut self) {
-        if let Err(error) = fs::remove_file(&self.0) {
-            // log-exempt: 预期的缺失：暂存清理对象已不存在，没有仍需删除的文件或目录。
-            if error.kind() != std::io::ErrorKind::NotFound {
-                crate::failure_log::failed(
-                    "agent.skills.cleanup_failed",
-                    "settings",
-                    &format!("{:?}", error.kind()),
-                    "io",
-                );
-            }
-        }
-    }
-}
-
-pub(super) fn write_override(
-    path: &Path,
-    name: &str,
-    enabled: bool,
-    cancelled: &dyn Fn() -> bool,
-) -> Result<(), Error> {
-    let parent = path.parent().ok_or_else(failed)?;
-    // Reject linked parents before writing, including a linked .claude directory.
-    let mut ancestors: Vec<_> = parent.ancestors().collect();
-    ancestors.reverse();
-    for ancestor in ancestors {
-        if !ancestor.exists() {
-            fs::create_dir(ancestor).map_err(|_| failed())?;
-        }
-        let metadata = fs::symlink_metadata(ancestor).map_err(|_| failed())?;
-        // macOS /var is a system link; resolve existing ancestors, but the actual
-        // settings directory itself must remain a regular native directory.
-        if !ancestor.is_dir() || (ancestor == parent && metadata.file_type().is_symlink()) {
-            return Err(failed());
-        }
-    }
-    let lock_path = parent.join(".lithe-skill-settings.lock");
-    let lock = options()
-        .read(true)
-        .write(true)
-        .create(true)
-        .truncate(false)
-        .open(&lock_path)
-        .map_err(|_| failed())?;
-    if !lock.metadata().map_err(|_| failed())?.is_file()
-        || fs::symlink_metadata(&lock_path)
-            .map_err(|_| failed())?
-            .file_type()
-            .is_symlink()
-    {
-        return Err(failed());
-    }
-    // Nonblocking lock serializes Lithe windows; native/editor changes are
-    // checked against the exact input snapshot before atomic publication.
-    lock.try_lock_exclusive().map_err(|_| {
-        Error::Failed("Skill settings are busy. Retry after the other change finishes.".into())
-    })?;
-    let before = snapshot(path)?;
-    let mut value = parse(before.as_deref())?;
-    value
-        .as_object_mut()
-        .ok_or_else(failed)?
-        .entry("skillOverrides")
-        .or_insert_with(|| json!({}))[name] = json!(if enabled { "on" } else { "off" });
-    let mut bytes = serde_json::to_vec_pretty(&value).map_err(|_| failed())?;
-    bytes.push(b'\n');
-    if bytes.len() as u64 > MAX_SETTINGS_BYTES {
-        return Err(failed());
-    }
-    check(cancelled)?;
-    let staging = Temporary(parent.join(format!(".lithe-skill-settings-{}", uuid::Uuid::new_v4())));
-    let mut file = options()
-        .write(true)
-        .create_new(true)
-        .open(&staging.0)
-        .map_err(|_| failed())?;
-    if let Ok(metadata) = fs::metadata(path) {
-        file.set_permissions(metadata.permissions())
-            .map_err(|_| failed())?;
-    }
-    file.write_all(&bytes)
-        .and_then(|_| file.sync_all())
-        .map_err(|_| failed())?;
-    drop(file);
-    check(cancelled)?;
-    if snapshot(path)? != before {
-        return Err(Error::Failed(
-            "Skill settings changed elsewhere. Refresh and retry.".into(),
-        ));
-    }
-    fs::rename(&staging.0, path).map_err(|_| failed())?;
-    Ok(())
-}
diff --git a/rust/lithe-agent-host/src/skills/tests.rs b/rust/lithe-agent-host/src/skills/tests.rs
deleted file mode 100644
index b7ab6a6c..00000000
--- a/rust/lithe-agent-host/src/skills/tests.rs
+++ /dev/null
@@ -1,663 +0,0 @@
-use super::*;
-use std::fs;
-use std::time::Duration;
-
-struct Sandbox(PathBuf);
-impl Sandbox {
-    fn new() -> Self {
-        let root = std::env::temp_dir().join(format!("lithe-skills-{}", uuid::Uuid::new_v4()));
-        fs::create_dir_all(root.join("home")).unwrap();
-        fs::create_dir_all(root.join("project")).unwrap();
-        Self(fs::canonicalize(root).unwrap())
-    }
-    fn run(&self, payload: Value) -> Result<Value, Error> {
-        let mut payload = payload;
-        payload["workspace"] = json!(self.0.join("project"));
-        execute_at(
-            serde_json::from_value(payload).unwrap(),
-            &self.0.join("home"),
-            &self.0.join("home/.claude"),
-            &|| false,
-        )
-    }
-}
-impl Drop for Sandbox {
-    fn drop(&mut self) {
-        fs::remove_dir_all(&self.0).unwrap();
-    }
-}
-fn create(agent: &str, scope: &str, name: &str) -> Value {
-    json!({"action":"create", "agentId":agent, "scope":scope, "name":name,
-        "description":"Use for Unicode 中文, quotes \" and newlines\nonly", "instructions":"# Workflow\n\n1. Inspect\n2. Explain"})
-}
-
-#[test]
-fn claude_toggles_preserve_documents_other_settings_and_scope() {
-    let fixture = Sandbox::new();
-    let user = fixture
-        .run(create("claude-acp", "user", "same-name"))
-        .unwrap();
-    let repo = fixture
-        .run(create("claude-acp", "repo", "same-name"))
-        .unwrap();
-    let user_settings = fixture.0.join("home/.claude/settings.json");
-    let local_settings = fixture.0.join("project/.claude/settings.local.json");
-    fs::write(
-        &user_settings,
-        r#"{"env":{"EXAMPLE":"keep"},"skillOverrides":{"unrelated":"name-only"}}"#,
-    )
-    .unwrap();
-    let document = fs::read(user["path"].as_str().unwrap()).unwrap();
-    let toggle = |scope: &str, source: &Value, enabled: bool| {
-        fixture.run(json!({"action":"setEnabled", "agentId":"claude-acp", "scope":scope,"source":source,"enabled":enabled}))
-    };
-    let result = toggle("user", &user["path"], false).unwrap();
-    assert!(result["skills"]
-        .as_array()
-        .unwrap()
-        .iter()
-        .all(|skill| skill["enabled"] == false));
-    assert!(
-        !local_settings.exists(),
-        "a global toggle must not write project settings"
-    );
-    let result = toggle("repo", &repo["path"], true).unwrap();
-    assert!(result["skills"]
-        .as_array()
-        .unwrap()
-        .iter()
-        .all(|skill| skill["enabled"] == (skill["scope"] == "repo")));
-    assert!(!fixture.0.join("project/.claude/settings.json").exists());
-    toggle("user", &user["path"], true).unwrap();
-    let config: Value = serde_json::from_slice(&fs::read(user_settings).unwrap()).unwrap();
-    assert_eq!(config["env"]["EXAMPLE"], "keep");
-    assert_eq!(config["skillOverrides"]["unrelated"], "name-only");
-    assert_eq!(config["skillOverrides"]["same-name"], "on");
-    assert_eq!(fs::read(user["path"].as_str().unwrap()).unwrap(), document);
-}
-
-#[test]
-fn claude_invalid_settings_are_never_replaced_and_hide_unknown_state() {
-    let fixture = Sandbox::new();
-    let result = fixture
-        .run(create("claude-acp", "repo", "test-skill"))
-        .unwrap();
-    let target = fixture.0.join("project/.claude/settings.local.json");
-    for invalid in [
-        "invalid JSON",
-        "[]",
-        r#"{"skillOverrides":[]}"#,
-        r#"{"skillOverrides":{"other":"unexpected"}}"#,
-    ] {
-        fs::write(&target, invalid).unwrap();
-        let listing = fixture
-            .run(json!({"action":"list","agentId":"claude-acp"}))
-            .unwrap();
-        assert_eq!(listing["skills"][0]["enabled"], Value::Null);
-        assert!(!listing["issues"].as_array().unwrap().is_empty());
-        assert!(fixture.run(json!({"action":"setEnabled","agentId":"claude-acp","scope":"repo","source":result["path"],"enabled":false})).is_err());
-        assert_eq!(fs::read_to_string(&target).unwrap(), invalid);
-    }
-}
-
-#[test]
-fn claude_toggles_reject_missing_or_foreign_paths_and_missing_state() {
-    let fixture = Sandbox::new();
-    let result = fixture
-        .run(create("claude-acp", "repo", "test-skill"))
-        .unwrap();
-    for payload in [
-        json!({"action":"setEnabled","agentId":"claude-acp","scope":"repo","source":result["path"]}),
-        json!({"action":"setEnabled","agentId":"claude-acp","scope":"user","source":result["path"],"enabled":false}),
-        json!({"action":"setEnabled","agentId":"claude-acp","scope":"repo","source":fixture.0.join("foreign/SKILL.md"),"enabled":false}),
-    ] {
-        assert!(fixture.run(payload).is_err());
-    }
-    assert!(!fixture
-        .0
-        .join("project/.claude/settings.local.json")
-        .exists());
-}
-
-#[test]
-fn claude_settings_cancel_and_busy_lock_never_change_existing_bytes() {
-    use fs2::FileExt;
-    let fixture = Sandbox::new();
-    let target = fixture.0.join("home/.claude/settings.json");
-    fs::create_dir_all(target.parent().unwrap()).unwrap();
-    fs::write(&target, "{\"other\":true}").unwrap();
-    assert!(settings::write_override(&target, "test", false, &|| true).is_err());
-    let lock = fs::OpenOptions::new()
-        .read(true)
-        .write(true)
-        .open(target.parent().unwrap().join(".lithe-skill-settings.lock"))
-        .unwrap();
-    lock.try_lock_exclusive().unwrap();
-    assert!(settings::write_override(&target, "test", false, &|| false).is_err());
-    drop(lock);
-    assert_eq!(fs::read_to_string(&target).unwrap(), "{\"other\":true}");
-    assert_eq!(
-        fs::read_dir(target.parent().unwrap()).unwrap().count(),
-        2,
-        "no temporary settings survive failure"
-    );
-}
-
-#[cfg(unix)]
-#[test]
-fn claude_settings_reject_symlinks_and_preserve_permissions() {
-    use std::os::unix::fs::{symlink, PermissionsExt};
-    let fixture = Sandbox::new();
-    let target = fixture.0.join("home/.claude/settings.json");
-    fs::create_dir_all(target.parent().unwrap()).unwrap();
-    let outside = fixture.0.join("outside.json");
-    fs::write(&outside, "{}").unwrap();
-    symlink(&outside, &target).unwrap();
-    assert!(settings::write_override(&target, "test", false, &|| false).is_err());
-    assert_eq!(fs::read_to_string(&outside).unwrap(), "{}");
-    fs::remove_file(&target).unwrap();
-    fs::write(&target, "{}").unwrap();
-    fs::set_permissions(&target, fs::Permissions::from_mode(0o640)).unwrap();
-    settings::write_override(&target, "test", false, &|| false).unwrap();
-    assert_eq!(
-        fs::metadata(&target).unwrap().permissions().mode() & 0o777,
-        0o640
-    );
-}
-const DOCUMENT: &str =
-    "---\nname: sample-skill\ndescription: Test skill\n---\n\nRead the supporting files.\n";
-
-#[test]
-fn create_is_native_scoped_non_overwriting_and_round_trips_document() {
-    let fixture = Sandbox::new();
-    for agent in ["codex-acp", "claude-acp"] {
-        for scope in ["user", "repo"] {
-            let result = fixture.run(create(agent, scope, "new-skill")).unwrap();
-            let path = PathBuf::from(result["path"].as_str().unwrap());
-            let parent = if scope == "user" {
-                fixture.0.join("home")
-            } else {
-                fixture.0.join("project")
-            };
-            assert!(path.starts_with(parent));
-            assert!(path.to_string_lossy().contains(if agent == "codex-acp" {
-                ".agents"
-            } else {
-                ".claude"
-            }));
-            let bytes = fs::read(&path).unwrap();
-            let parsed = files::read_document(&path).unwrap();
-            assert!(parsed.contains("中文"));
-            assert_eq!(files::metadata(&bytes, "").unwrap().0, "new-skill");
-            assert!(fixture.run(create(agent, scope, "new-skill")).is_err());
-            assert_eq!(fs::read(&path).unwrap(), bytes);
-        }
-    }
-}
-
-#[test]
-fn import_keeps_full_package_and_never_changes_the_source() {
-    let fixture = Sandbox::new();
-    let source = fixture.0.join("external");
-    fs::create_dir_all(source.join("scripts")).unwrap();
-    fs::write(source.join("SKILL.md"), DOCUMENT).unwrap();
-    fs::write(source.join("scripts/helper.sh"), "#!/bin/sh\nexit 0\n").unwrap();
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::PermissionsExt;
-        fs::set_permissions(
-            source.join("scripts/helper.sh"),
-            fs::Permissions::from_mode(0o755),
-        )
-        .unwrap();
-    }
-    let result = fixture
-        .run(json!({"action":"import", "agentId":"codex-acp", "scope":"repo", "source":source}))
-        .unwrap();
-    let copied = PathBuf::from(result["path"].as_str().unwrap());
-    #[cfg(unix)]
-    {
-        use std::os::unix::fs::PermissionsExt;
-        assert_eq!(
-            fs::metadata(copied.parent().unwrap().join("scripts/helper.sh"))
-                .unwrap()
-                .permissions()
-                .mode(),
-            fs::metadata(source.join("scripts/helper.sh"))
-                .unwrap()
-                .permissions()
-                .mode()
-        );
-    }
-    assert_eq!(fs::read(&copied).unwrap(), DOCUMENT.as_bytes());
-    assert_eq!(
-        fs::read(copied.parent().unwrap().join("scripts/helper.sh")).unwrap(),
-        fs::read(source.join("scripts/helper.sh")).unwrap()
-    );
-    assert_eq!(
-        fs::read(source.join("SKILL.md")).unwrap(),
-        DOCUMENT.as_bytes()
-    );
-    assert!(fixture
-        .run(json!({"action":"import", "agentId":"codex-acp", "scope":"repo", "source":source}))
-        .is_err());
-}
-
-#[test]
-fn single_file_import_and_claude_directory_fallback_are_supported() {
-    let fixture = Sandbox::new();
-    let source = fixture.0.join("SKILL.md");
-    fs::write(&source, DOCUMENT).unwrap();
-    assert!(fixture
-        .run(json!({"action":"import", "agentId":"claude-acp", "scope":"user", "source":source}))
-        .is_ok());
-    let directory = fixture.0.join("folder-skill");
-    fs::create_dir(&directory).unwrap();
-    fs::write(
-        directory.join("SKILL.md"),
-        "---\ndescription: Folder fallback\n---\n\nInstructions\n",
-    )
-    .unwrap();
-    assert!(fixture
-        .run(json!({"action":"import", "agentId":"codex-acp", "scope":"user", "source":directory}))
-        .is_err());
-    let result = fixture
-        .run(json!({"action":"import", "agentId":"claude-acp", "scope":"user", "source":directory}))
-        .unwrap();
-    assert!(result["path"].as_str().unwrap().contains("folder-skill"));
-}
-
-#[test]
-fn directory_inventory_reports_configured_visibility_and_malformed_issues() {
-    let fixture = Sandbox::new();
-    fixture
-        .run(create("claude-acp", "user", "user-skill"))
-        .unwrap();
-    fixture
-        .run(create("claude-acp", "repo", "project-skill"))
-        .unwrap();
-    let bad = fixture.0.join("project/.claude/skills/broken");
-    fs::create_dir(&bad).unwrap();
-    fs::write(bad.join("SKILL.md"), "---\nname: [invalid\n---\n").unwrap();
-    let result = fixture
-        .run(json!({"action":"list", "agentId":"claude-acp"}))
-        .unwrap();
-    assert_eq!(result["source"], "directory");
-    assert_eq!(result["skills"].as_array().unwrap().len(), 2);
-    assert!(result["skills"]
-        .as_array()
-        .unwrap()
-        .iter()
-        .all(|row| row["enabled"] == true));
-    assert_eq!(result["issues"].as_array().unwrap().len(), 1);
-    let directory = PathBuf::from(result["directories"]["repo"].as_str().unwrap());
-    assert!(directory.ends_with(PathBuf::from(".claude").join("skills")));
-}
-
-#[test]
-fn invalid_names_yaml_and_missing_workspace_do_not_publish_any_skill() {
-    let fixture = Sandbox::new();
-    for name in ["../escape", "UPPER", "", "a--b", "/absolute", "a/b"] {
-        assert!(fixture.run(create("codex-acp", "repo", name)).is_err());
-    }
-    let payload = create("codex-acp", "repo", "valid-name");
-    assert!(execute_at(
-        serde_json::from_value(payload).unwrap(),
-        &fixture.0.join("home"),
-        &fixture.0.join("home/.claude"),
-        &|| false
-    )
-    .is_err());
-    let source = fixture.0.join("SKILL.md");
-    for text in [
-        "No frontmatter",
-        "---\nname: no-close",
-        "---\n[]\n---\n",
-        "---\nname: test\n---\nBody",
-    ] {
-        fs::write(&source, text).unwrap();
-        assert!(fixture
-            .run(json!({"action":"import", "agentId":"codex-acp", "scope":"user", "source":source}))
-            .is_err());
-    }
-    assert!(!fixture.0.join("project/.agents").exists());
-}
-
-#[cfg(unix)]
-#[test]
-fn linked_destinations_and_import_resources_are_rejected_without_partial_publish() {
-    use std::os::unix::fs::symlink;
-    let fixture = Sandbox::new();
-    let outside = fixture.0.join("outside");
-    fs::create_dir(&outside).unwrap();
-    symlink(&outside, fixture.0.join("project/.agents")).unwrap();
-    assert!(fixture
-        .run(create("codex-acp", "repo", "linked-skill"))
-        .is_err());
-    assert_eq!(fs::read_dir(&outside).unwrap().count(), 0);
-    let source = fixture.0.join("package");
-    fs::create_dir(&source).unwrap();
-    fs::write(source.join("SKILL.md"), DOCUMENT).unwrap();
-    symlink(&outside, source.join("assets")).unwrap();
-    assert!(fixture
-        .run(json!({"action":"import", "agentId":"codex-acp", "scope":"user", "source":source}))
-        .is_err());
-    let root = fixture.0.join("home/.agents/skills");
-    assert_eq!(
-        fs::read_dir(root).unwrap().count(),
-        0,
-        "failed import cleans staging and publishes nothing"
-    );
-}
-
-#[test]
-fn cancel_during_package_copy_cleans_staging_and_preserves_existing_skill() {
-    let fixture = Sandbox::new();
-    fixture
-        .run(create("codex-acp", "user", "existing"))
-        .unwrap();
-    let source = fixture.0.join("package");
-    fs::create_dir(&source).unwrap();
-    fs::write(source.join("SKILL.md"), DOCUMENT).unwrap();
-    fs::write(source.join("other.txt"), "resource").unwrap();
-    let calls = std::cell::Cell::new(0);
-    let cancel = || {
-        calls.set(calls.get() + 1);
-        calls.get() >= 5
-    };
-    let request: Request = serde_json::from_value(
-        json!({"action":"import", "agentId":"codex-acp", "scope":"user", "source":source}),
-    )
-    .unwrap();
-    assert!(matches!(
-        execute_at(
-            request,
-            &fixture.0.join("home"),
-            &fixture.0.join("home/.claude"),
-            &cancel
-        ),
-        Err(Error::Cancelled)
-    ));
-    let root = fixture.0.join("home/.agents/skills");
-    assert_eq!(fs::read_dir(&root).unwrap().count(), 1);
-    assert!(root.join("existing/SKILL.md").is_file());
-}
-
-#[test]
-fn publication_cannot_replace_an_existing_empty_directory() {
-    let fixture = Sandbox::new();
-    let source = fixture.0.join("stage");
-    let target = fixture.0.join("target");
-    fs::create_dir(&source).unwrap();
-    fs::write(source.join("SKILL.md"), DOCUMENT).unwrap();
-    // The final native move must reject a destination created after staging,
-    // even when the competing directory is empty.
-    fs::create_dir(&target).unwrap();
-    assert!(files::publish(&source, &target).is_err());
-    assert_eq!(fs::read_dir(target).unwrap().count(), 0);
-    assert!(source.join("SKILL.md").is_file());
-}
-
-#[test]
-fn publication_preserves_existing_files_and_directory_contents() {
-    for directory in [false, true] {
-        let fixture = Sandbox::new();
-        let source = fixture.0.join("stage");
-        let target = fixture.0.join("target");
-        fs::create_dir(&source).unwrap();
-        fs::write(source.join("SKILL.md"), DOCUMENT).unwrap();
-        let existing = if directory {
-            fs::create_dir(&target).unwrap();
-            target.join("keep.txt")
-        } else {
-            target.clone()
-        };
-        fs::write(&existing, "keep existing bytes").unwrap();
-        assert!(files::publish(&source, &target).is_err());
-        assert_eq!(fs::read_to_string(existing).unwrap(), "keep existing bytes");
-        assert_eq!(
-            fs::read_to_string(source.join("SKILL.md")).unwrap(),
-            DOCUMENT
-        );
-    }
-}
-
-#[test]
-fn publication_moves_a_complete_package_to_a_missing_unicode_destination() {
-    let fixture = Sandbox::new();
-    let source = fixture.0.join("stage with spaces");
-    let target = fixture.0.join("skill 中文");
-    fs::create_dir_all(source.join("scripts")).unwrap();
-    fs::write(source.join("SKILL.md"), DOCUMENT).unwrap();
-    fs::write(source.join("scripts/example.txt"), "resource bytes").unwrap();
-    files::publish(&source, &target).unwrap();
-    assert!(!source.exists());
-    assert_eq!(
-        fs::read_to_string(target.join("SKILL.md")).unwrap(),
-        DOCUMENT
-    );
-    assert_eq!(
-        fs::read_to_string(target.join("scripts/example.txt")).unwrap(),
-        "resource bytes"
-    );
-}
-
-#[cfg(windows)]
-#[test]
-fn publication_rejects_nul_paths_without_publishing_the_truncated_name() {
-    use std::os::windows::ffi::{OsStrExt, OsStringExt};
-    let fixture = Sandbox::new();
-    let source = fixture.0.join("stage");
-    let prefix = fixture.0.join("target");
-    let mut name: Vec<u16> = prefix.as_os_str().encode_wide().collect();
-    name.extend([0, b'x' as u16]);
-    let target = PathBuf::from(std::ffi::OsString::from_wide(&name));
-    fs::create_dir(&source).unwrap();
-    fs::write(source.join("SKILL.md"), DOCUMENT).unwrap();
-    assert!(files::publish(&source, &target).is_err());
-    assert!(!prefix.exists());
-    assert_eq!(
-        fs::read_to_string(source.join("SKILL.md")).unwrap(),
-        DOCUMENT
-    );
-}
-
-#[test]
-fn native_response_keeps_disabled_scope_and_rejects_foreign_workspace() {
-    let fixture = Sandbox::new();
-    let cwd = fixture.0.join("project");
-    let value = json!({"data":[{"cwd":cwd, "skills":[
-        {"name":"native-skill", "description":"Reported", "path":fixture.0.join("SKILL.md"), "scope":"system", "enabled":false}],"errors":[]}]});
-    let listing = parse_codex(&value, &cwd).unwrap();
-    assert_eq!(listing.skills[0].enabled, Some(false));
-    assert_eq!(listing.skills[0].scope, "system");
-    assert!(parse_codex(&value, &fixture.0.join("foreign")).is_err());
-}
-
-#[cfg(unix)]
-#[tokio::test]
-async fn native_discovery_uses_the_selected_account_directory() {
-    use std::os::unix::fs::PermissionsExt;
-    let fixture = Sandbox::new();
-    let executable = fixture.0.join("fake-codex");
-    let home = fixture.0.join("account");
-    let response = json!({"data":[{"cwd":fixture.0.join("project"), "skills":[], "errors":[]}]});
-    let script = format!("#!/bin/sh\nprintf '%s' \"$CODEX_HOME\" > '{}'/home.log\nwhile IFS= read -r line; do\n  case \"$line\" in\n    *'\"method\":\"initialize\"'*) printf '%s\\n' '{{\"id\":1,\"result\":{{}}}}' ;;\n    *'\"method\":\"skills/list\"'*) printf '%s\\n' '{{\"id\":2,\"result\":{response}}}' ;;\n  esac\ndone\n", fixture.0.display());
-    fs::write(&executable, script).unwrap();
-    fs::set_permissions(&executable, fs::Permissions::from_mode(0o700)).unwrap();
-    tokio::time::timeout(
-        Duration::from_secs(5),
-        CodexHistory::skills(
-            executable,
-            fixture.0.join("project"),
-            Some(home.clone()),
-            &|| false,
-        ),
-    )
-    .await
-    .unwrap()
-    .unwrap();
-    assert_eq!(
-        fs::read_to_string(fixture.0.join("home.log")).unwrap(),
-        home.to_str().unwrap()
-    );
-}
-
-#[cfg(unix)]
-#[tokio::test]
-async fn native_discovery_only_initializes_and_lists_without_creating_or_prompting() {
-    use std::os::unix::fs::PermissionsExt;
-    let fixture = Sandbox::new();
-    let executable = fixture.0.join("fake-codex");
-    let response = json!({"data":[{"cwd":fixture.0.join("project"), "skills":[], "errors":[]}]});
-    let script = format!("#!/bin/sh\nwhile IFS= read -r line; do\n  printf '%s\\n' \"$line\" >> '{}'/requests.log\n  case \"$line\" in\n    *'\"method\":\"initialize\"'*) printf '%s\\n' '{{\"id\":1,\"result\":{{}}}}' ;;\n    *'\"method\":\"skills/list\"'*) printf '%s\\n' '{{\"id\":2,\"result\":{response}}}' ;;\n  esac\ndone\n", fixture.0.display());
-    fs::write(&executable, script).unwrap();
-    fs::set_permissions(&executable, fs::Permissions::from_mode(0o700)).unwrap();
-    let result = tokio::time::timeout(
-        Duration::from_secs(5),
-        CodexHistory::skills(executable, fixture.0.join("project"), None, &|| false),
-    )
-    .await
-    .unwrap()
-    .unwrap();
-    assert_eq!(result, response);
-    let requests: Vec<Value> = fs::read_to_string(fixture.0.join("requests.log"))
-        .unwrap()
-        .lines()
-        .map(|line| serde_json::from_str(line).unwrap())
-        .collect();
-    assert_eq!(
-        requests
-            .iter()
-            .map(|row| row["method"].as_str().unwrap())
-            .collect::<Vec<_>>(),
-        ["initialize", "initialized", "skills/list"]
-    );
-    assert_eq!(requests[2]["params"]["forceReload"], true);
-}
-
-#[cfg(unix)]
-#[tokio::test]
-async fn native_toggle_validates_path_writes_native_config_and_reads_back() {
-    use std::os::unix::fs::PermissionsExt;
-    let fixture = Sandbox::new();
-    let executable = fixture.0.join("fake-codex");
-    let path = fixture.0.join("project/.agents/skills/test/SKILL.md");
-    let listing = |enabled| json!({"data":[{"cwd":fixture.0.join("project"),"skills":[{"name":"test","description":"Test","path":path,"scope":"repo","enabled":enabled}],"errors":[]}]});
-    let script = format!("#!/bin/sh\nwhile IFS= read -r line; do\n printf '%s\\n' \"$line\" >> '{}'/requests.log\n case \"$line\" in\n *'\"method\":\"initialize\"'*) printf '%s\\n' '{{\"id\":1,\"result\":{{}}}}' ;;\n *'\"id\":2,'*) printf '%s\\n' '{{\"id\":2,\"result\":{}}}' ;;\n *'\"id\":3,'*) printf '%s\\n' '{{\"id\":3,\"result\":{{}}}}' ;;\n *'\"id\":4,'*) printf '%s\\n' '{{\"id\":4,\"result\":{}}}' ;;\n esac\ndone\n", fixture.0.display(), listing(true), listing(false));
-    fs::write(&executable, script).unwrap();
-    fs::set_permissions(&executable, fs::Permissions::from_mode(0o700)).unwrap();
-    let result = tokio::time::timeout(
-        Duration::from_secs(5),
-        CodexHistory::set_skill_enabled(
-            executable.clone(),
-            fixture.0.join("project"),
-            path.clone(),
-            false,
-            None,
-            &|| false,
-        ),
-    )
-    .await
-    .unwrap()
-    .unwrap();
-    assert_eq!(result, listing(false));
-    let requests: Vec<Value> = fs::read_to_string(fixture.0.join("requests.log"))
-        .unwrap()
-        .lines()
-        .map(|line| serde_json::from_str(line).unwrap())
-        .collect();
-    assert_eq!(
-        requests
-            .iter()
-            .map(|row| row["method"].as_str().unwrap())
-            .collect::<Vec<_>>(),
-        [
-            "initialize",
-            "initialized",
-            "skills/list",
-            "skills/config/write",
-            "skills/list"
-        ]
-    );
-    assert_eq!(requests[3]["params"], json!({"path":path,"enabled":false}));
-    fs::remove_file(fixture.0.join("requests.log")).unwrap();
-    let rejected = tokio::time::timeout(
-        Duration::from_secs(5),
-        CodexHistory::set_skill_enabled(
-            executable,
-            fixture.0.join("project"),
-            fixture.0.join("foreign/SKILL.md"),
-            false,
-            None,
-            &|| false,
-        ),
-    )
-    .await
-    .unwrap();
-    assert_eq!(rejected, Err("unknown skill"));
-    assert!(!fs::read_to_string(fixture.0.join("requests.log"))
-        .unwrap()
-        .contains("skills/config/write"));
-}
-
-#[cfg(unix)]
-#[test]
-fn shared_skill_fixture_preserves_native_scopes_plugins_and_disabled_state() {
-    let fixture: Value = serde_json::from_str(include_str!(
-        "../../../fixtures/agent/skills-management-v1.json"
-    ))
-    .unwrap();
-    let listing = parse_codex(&fixture["nativeCodex"], Path::new("/fixture/workspace")).unwrap();
-    assert_eq!(
-        serde_json::to_value(listing).unwrap(),
-        fixture["normalizedCodex"]
-    );
-}
-
-#[test]
-fn oversized_import_is_bounded_and_never_published() {
-    let fixture = Sandbox::new();
-    let source = fixture.0.join("SKILL.md");
-    let file = fs::File::create(&source).unwrap();
-    file.set_len(8 * 1024 * 1024 + 1).unwrap();
-    assert!(fixture
-        .run(json!({"action":"import", "agentId":"codex-acp", "scope":"user", "source":source}))
-        .is_err());
-    assert!(!fixture.0.join("home/.agents").exists());
-}
-
-#[cfg(unix)]
-#[tokio::test]
-async fn cancelled_discovery_reaps_the_probe_even_while_initialization_is_stalled() {
-    use std::os::unix::fs::PermissionsExt;
-    let fixture = Sandbox::new();
-    let executable = fixture.0.join("stalled-codex");
-    let pid_file = fixture.0.join("probe.pid");
-    fs::write(
-        &executable,
-        format!(
-            "#!/bin/sh\nprintf '%s' \"$$\" > '{}'\nwhile IFS= read -r line; do :; done\n",
-            pid_file.display()
-        ),
-    )
-    .unwrap();
-    fs::set_permissions(&executable, fs::Permissions::from_mode(0o700)).unwrap();
-    // The child announces startup before the cancellation check becomes true.
-    // No real-time sleep coordinates the test; the production poll remains bounded.
-    let cancelled = || pid_file.exists();
-    let result = tokio::time::timeout(
-        Duration::from_secs(5),
-        CodexHistory::skills(executable, fixture.0.join("project"), None, &cancelled),
-    )
-    .await
-    .unwrap();
-    assert_eq!(result, Err("cancelled"));
-    let pid: i32 = fs::read_to_string(pid_file).unwrap().parse().unwrap();
-    // A terminated but unreaped child would still answer kill(pid, 0).
-    assert_eq!(
-        unsafe { libc::kill(pid, 0) },
-        -1,
-        "probe must be reaped before discovery returns"
-    );
-}
diff --git a/rust/lithe-agent-host/src/steering.rs b/rust/lithe-agent-host/src/steering.rs
deleted file mode 100644
index 22013eb9..00000000
--- a/rust/lithe-agent-host/src/steering.rs
+++ /dev/null
@@ -1,212 +0,0 @@
-//! Capability-negotiated ACP steering and ownership of detached Codex continuations.
-//!
-//! The pinned Codex adapter can start a new turn when steering races completion.
-//! Its explicit thread-status notifications keep that continuation inside the
-//! original Host turn; silence and token counts never imply completion.
-
-use std::sync::Mutex;
-
-use agent_client_protocol::schema::v1::ContentBlock;
-use serde::{Deserialize, Serialize};
-use serde_json::{json, Value};
-use tokio::sync::watch;
-
-#[derive(Debug, Clone, Serialize, Deserialize, agent_client_protocol::JsonRpcRequest)]
-#[request(method = "_session/steering", response = Response)]
-#[serde(rename_all = "camelCase")]
-pub(crate) struct Request {
-    session_id: String,
-    prompt: Vec<ContentBlock>,
-    #[serde(rename = "_meta")]
-    meta: Value,
-}
-
-#[derive(Debug, Clone, Serialize, Deserialize, agent_client_protocol::JsonRpcResponse)]
-pub(crate) struct Response {
-    pub outcome: String,
-}
-
-#[derive(Clone, Default)]
-struct Progress {
-    pending: bool,
-    idle_count: u64,
-    status: Option<String>,
-    continuation_idle: Option<u64>,
-}
-
-fn terminal(status: Option<&str>) -> bool {
-    matches!(status, Some("idle" | "systemError" | "notLoaded"))
-}
-
-/// One logical Host turn, including steering that upstream moves into a new turn.
-pub(crate) struct Turn {
-    progress: Mutex<watch::Sender<Progress>>,
-}
-
-impl Default for Turn {
-    fn default() -> Self {
-        Self {
-            progress: Mutex::new(watch::channel(Progress::default()).0),
-        }
-    }
-}
-
-impl Turn {
-    /// Reserve one request and remember which native idle must end a fallback.
-    pub(crate) fn begin(&self) -> Option<u64> {
-        let progress = self.progress.lock().ok()?;
-        let snapshot = progress.borrow().clone();
-        if snapshot.pending {
-            return None;
-        }
-        // An active original turn must first settle, then its detached
-        // continuation must settle. Failed originals can report systemError
-        // rather than idle. Duplicate terminal notifications do not count.
-        let target = snapshot.idle_count
-            + if terminal(snapshot.status.as_deref()) {
-                1
-            } else {
-                2
-            };
-        progress.send_modify(|state| state.pending = true);
-        Some(target)
-    }
-
-    pub(crate) fn finish(&self, continuation_idle: Option<u64>) {
-        if let Ok(progress) = self.progress.lock() {
-            progress.send_modify(|state| {
-                state.pending = false;
-                if let Some(idle) = continuation_idle {
-                    state.continuation_idle = Some(idle);
-                }
-            });
-        }
-    }
-
-    pub(crate) fn observe(&self, update: &Value) {
-        let Some(status) = update
-            .pointer("/_meta/codex/threadStatus/type")
-            .and_then(Value::as_str)
-        else {
-            return;
-        };
-        if let Ok(progress) = self.progress.lock() {
-            progress.send_modify(|state| {
-                if terminal(Some(status)) && !terminal(state.status.as_deref()) {
-                    state.idle_count += 1;
-                }
-                state.status = Some(status.to_owned());
-            });
-        }
-    }
-
-    /// Waits without a turn deadline. Connection shutdown aborts the owning
-    /// task; the normal Host cancellation watchdog still bounds explicit Stop.
-    pub(crate) async fn settled(&self) -> Result<bool, String> {
-        let mut receiver = self
-            .progress
-            .lock()
-            .map_err(|_| "Steering state is unavailable")?
-            .subscribe();
-        loop {
-            let state = receiver.borrow_and_update().clone();
-            if !state.pending {
-                match state.continuation_idle {
-                    None => return Ok(false),
-                    Some(idle) if state.idle_count >= idle => {
-                        return if state.status.as_deref() == Some("idle") {
-                            Ok(true)
-                        } else {
-                            Err("The Agent continuation failed".into())
-                        };
-                    }
-                    _ => {}
-                }
-            }
-            receiver
-                .changed()
-                .await
-                .map_err(|_| "The Agent connection closed")?;
-        }
-    }
-}
-
-pub(crate) fn supported(meta: Option<&serde_json::Map<String, Value>>) -> bool {
-    meta.and_then(|meta| meta.get("steering"))
-        .and_then(|value| value.get("supported"))
-        .and_then(Value::as_bool)
-        == Some(true)
-}
-
-pub(crate) fn request(session_id: &str, content: Vec<ContentBlock>) -> Request {
-    Request {
-        session_id: session_id.into(),
-        prompt: content,
-        meta: json!({ "steering": { "idleBehavior": "promptRequired" } }),
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use std::time::Duration;
-
-    fn status(turn: &Turn, status: &str) {
-        turn.observe(&json!({ "_meta": { "codex": { "threadStatus": { "type": status } } } }));
-    }
-
-    #[tokio::test]
-    async fn continuation_can_finish_before_its_steering_acknowledgement() {
-        let turn = Turn::default();
-        status(&turn, "active");
-        let target = turn.begin().unwrap();
-        status(&turn, "idle");
-        status(&turn, "active");
-        status(&turn, "idle");
-        turn.finish(Some(target));
-        assert_eq!(
-            tokio::time::timeout(Duration::from_secs(1), turn.settled())
-                .await
-                .unwrap(),
-            Ok(true)
-        );
-    }
-
-    #[tokio::test]
-    async fn already_idle_original_requires_only_the_continuations_idle() {
-        let turn = Turn::default();
-        status(&turn, "idle");
-        let target = turn.begin().unwrap();
-        assert!(
-            turn.begin().is_none(),
-            "one outstanding delivery per session"
-        );
-        status(&turn, "active");
-        status(&turn, "idle");
-        turn.finish(Some(target));
-        assert_eq!(
-            tokio::time::timeout(Duration::from_secs(1), turn.settled())
-                .await
-                .unwrap(),
-            Ok(true)
-        );
-    }
-
-    #[tokio::test]
-    async fn a_failed_original_does_not_strand_a_successful_continuation() {
-        let turn = Turn::default();
-        status(&turn, "active");
-        let target = turn.begin().unwrap();
-        status(&turn, "systemError");
-        status(&turn, "idle");
-        status(&turn, "active");
-        status(&turn, "idle");
-        turn.finish(Some(target));
-        assert_eq!(
-            tokio::time::timeout(Duration::from_secs(1), turn.settled())
-                .await
-                .unwrap(),
-            Ok(true)
-        );
-    }
-}
diff --git a/rust/lithe-agent-host/src/subagents.rs b/rust/lithe-agent-host/src/subagents.rs
deleted file mode 100644
index c2f90ba2..00000000
--- a/rust/lithe-agent-host/src/subagents.rs
+++ /dev/null
@@ -1,203 +0,0 @@
-//! Compatibility for the pinned adapters' AIR native child-session extension.
-//!
-//! Keep standard ACP updates validated by the SDK. The adapters currently emit
-//! `subagent_spawned`/`subagent_state_update`; newer SDKs instead implement the
-//! incompatible `subagent_update` proposal. Remove this wire shim when the pinned
-//! adapters and SDK agree. Transport, child execution and history stay upstream.
-
-use std::collections::{HashMap, HashSet};
-
-use agent_client_protocol::schema::v1::{SessionId, SessionUpdate};
-use serde::{Deserialize, Serialize};
-use serde_json::Value;
-
-/// Existing session notification with only the negotiated AIR update variants added.
-#[derive(Debug, Clone, Deserialize, Serialize, agent_client_protocol::JsonRpcNotification)]
-#[notification(method = "session/update")]
-#[serde(rename_all = "camelCase")]
-pub(crate) struct Notification {
-    pub session_id: SessionId,
-    pub update: Update,
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use serde_json::json;
-
-    #[test]
-    fn native_and_standard_notifications_round_trip_the_shared_fixture() {
-        let fixture: Value =
-            serde_json::from_str(include_str!("../../fixtures/agent/acp-events-v1.json")).unwrap();
-        for name in [
-            "subagentSpawned",
-            "nestedSubagentSpawned",
-            "subagentStateUpdate",
-            "subagentMessageChunk",
-            "subagentThoughtChunk",
-            "subagentToolCall",
-            "toolCall",
-        ] {
-            let event = &fixture["events"][name];
-            let notification = json!({"sessionId":event["sessionId"], "update":event["update"]});
-            let parsed: Notification = serde_json::from_value(notification.clone()).unwrap();
-            assert_eq!(
-                serde_json::to_value(parsed).unwrap(),
-                notification,
-                "{name}"
-            );
-        }
-    }
-
-    #[test]
-    fn child_ownership_rejects_cycles_cross_roots_and_terminal_permissions() {
-        let spawn = |id: &str| json!({"sessionUpdate":"subagent_spawned", "subagentSessionId":id});
-        let mut sessions = Sessions::default();
-        sessions.note_root("one");
-        sessions.note_root("two");
-        assert!(sessions.observe("one", &spawn("child")));
-        assert!(sessions.observe("child", &spawn("nested")));
-        assert_eq!(sessions.root("nested").as_deref(), Some("one"));
-        assert!(!sessions.observe("two", &spawn("child")));
-        assert!(!sessions.observe("nested", &spawn("one")));
-        assert!(!sessions.observe("one", &spawn("two")));
-        assert!(!sessions.observe("child", &spawn("child")));
-        assert!(sessions.observe("one", &json!({"sessionUpdate":"subagent_state_update", "subagentSessionId":"child", "state":"completed"})));
-        assert!(!sessions.is_live("child"));
-        assert!(!sessions.is_live("nested"));
-        assert!(sessions.is_live("one"));
-        sessions.clear("one");
-        assert_eq!(sessions.root("nested").as_deref(), Some("nested"));
-        assert!(
-            sessions.observe("one", &spawn("child")),
-            "Reload can announce the same child anew"
-        );
-        assert!(sessions.is_live("child"));
-    }
-}
-
-/// The SDK owns all ordinary update validation and serialization.
-#[derive(Debug, Clone, Deserialize, Serialize)]
-#[serde(untagged)]
-pub(crate) enum Update {
-    Native(NativeUpdate),
-    Standard(SessionUpdate),
-}
-
-/// Draft wire forms actually published by claude-agent-acp 0.81.2 and codex-acp 1.13.1.
-#[derive(Debug, Clone, Deserialize, Serialize)]
-#[serde(
-    tag = "sessionUpdate",
-    rename_all = "snake_case",
-    rename_all_fields = "camelCase"
-)]
-pub(crate) enum NativeUpdate {
-    SubagentSpawned {
-        subagent_session_id: String,
-        name: String,
-        task: String,
-        capabilities: Value,
-        #[serde(flatten)]
-        extra: serde_json::Map<String, Value>,
-    },
-    SubagentStateUpdate {
-        subagent_session_id: String,
-        state: String,
-        #[serde(flatten)]
-        extra: serde_json::Map<String, Value>,
-    },
-}
-
-/// Connection-local ownership, used to charge child activity and permissions to
-/// the existing root turn. It never launches, subscribes to or prompts a child.
-#[derive(Default)]
-pub(crate) struct Sessions {
-    parents: HashMap<String, String>,
-    terminal: HashSet<String>,
-    roots: HashSet<String>,
-}
-
-impl Sessions {
-    pub(crate) fn note_root(&mut self, session: &str) {
-        self.roots.insert(session.to_owned());
-    }
-
-    /// Resolve the root with a bounded walk; unannounced sessions own themselves.
-    pub(crate) fn root(&self, session: &str) -> Option<String> {
-        let mut current = session;
-        for _ in 0..=self.parents.len() {
-            match self.parents.get(current) {
-                Some(parent) => current = parent,
-                None => return Some(current.to_owned()),
-            }
-        }
-        None
-    }
-
-    /// Terminal children cannot request new permissions or revive root activity.
-    pub(crate) fn is_live(&self, session: &str) -> bool {
-        let mut current = session;
-        for _ in 0..=self.parents.len() {
-            if self.terminal.contains(current) {
-                return false;
-            }
-            match self.parents.get(current) {
-                Some(parent) => current = parent,
-                None => return true,
-            }
-        }
-        false
-    }
-
-    /// Reject cycles and cross-parent reattachment, preserving permission ownership.
-    pub(crate) fn observe(&mut self, parent: &str, update: &Value) -> bool {
-        match update["sessionUpdate"].as_str() {
-            Some("subagent_spawned") => {
-                let Some(child) = update["subagentSessionId"]
-                    .as_str()
-                    .filter(|id| !id.is_empty())
-                else {
-                    return false;
-                };
-                if self.roots.contains(child)
-                    || child == parent
-                    || self.root(parent).as_deref() == Some(child)
-                    || self.parents.get(child).is_some_and(|old| old != parent)
-                {
-                    return false;
-                }
-                self.parents.insert(child.to_owned(), parent.to_owned());
-            }
-            Some("subagent_state_update") => {
-                let Some(child) = update["subagentSessionId"].as_str() else {
-                    return false;
-                };
-                if self.parents.get(child).map(String::as_str) != Some(parent) {
-                    return false;
-                }
-                if matches!(
-                    update["state"].as_str(),
-                    Some("completed" | "failed" | "cancelled" | "disconnected")
-                ) {
-                    self.terminal.insert(child.to_owned());
-                }
-            }
-            _ => {}
-        }
-        true
-    }
-
-    /// A root history reload announces its children again before replaying them.
-    pub(crate) fn clear(&mut self, root: &str) {
-        let children: Vec<_> = self
-            .parents
-            .keys()
-            .filter(|child| self.root(child).as_deref() == Some(root))
-            .cloned()
-            .collect();
-        for child in children {
-            self.parents.remove(&child);
-            self.terminal.remove(&child);
-        }
-    }
-}
diff --git a/rust/lithe-agent-host/src/subscription.rs b/rust/lithe-agent-host/src/subscription.rs
deleted file mode 100644
index ac3b3f56..00000000
--- a/rust/lithe-agent-host/src/subscription.rs
+++ /dev/null
@@ -1,444 +0,0 @@
-//! Codex-owned subscription authentication and bounded, read-only quota probes.
-//!
-//! The pinned ACP adapter does not expose structured rate limits. A short-lived
-//! official App Server reads them without Lithe opening any credential file.
-//! No thread, prompt, model request, or persistent Lithe cache is created.
-
-use super::*;
-use serde_json::{json, Value};
-use tokio::io::{AsyncBufRead, AsyncBufReadExt, AsyncWrite, AsyncWriteExt, BufReader};
-
-// Official Codex ChatGPT route, matching the upstream default. This is passed
-// to Codex configuration only; Lithe never issues authenticated HTTP requests.
-const CHATGPT_BASE_URL: &str = "https://chatgpt.com/backend-api/";
-/// Official inference origin; the native provider's backend path is retained
-/// after the proxy capability prefix, not appended to this upstream twice.
-pub(super) const INFERENCE_ORIGIN: &str = "https://chatgpt.com";
-
-/// Codex's own switch for selecting an isolated account directory.
-pub(super) const CODEX_HOME_ENVIRONMENT: &str = "CODEX_HOME";
-
-const PROBE_TIMEOUT: Duration = Duration::from_secs(20);
-const MAX_REPLY_BYTES: u64 = 1024 * 1024;
-pub(super) const LOGIN_TIMEOUT: Duration = Duration::from_secs(300);
-pub(super) const QUOTA_INTERVAL: Duration = Duration::from_secs(60);
-
-/// Account identity reported by Codex, used only in memory and never logged.
-#[derive(Clone, Debug, Default, Deserialize, Serialize, PartialEq, Eq)]
-pub struct Account {
-    pub email: Option<String>,
-    pub plan: Option<String>,
-}
-
-/// A real quota window. Unknown utilization is never interpreted as zero.
-#[derive(Debug, Serialize, PartialEq)]
-#[serde(rename_all = "camelCase")]
-pub struct QuotaWindow {
-    pub id: String,
-    pub name: String,
-    pub limit_seconds: u64,
-    pub used_percent: Option<f64>,
-    /// Unix seconds, as reported by Codex.
-    pub resets_at: Option<i64>,
-}
-
-/// Last successful read; consumers retain it as stale on transient failures.
-#[derive(Debug, Serialize)]
-#[serde(rename_all = "camelCase")]
-pub struct QuotaSnapshot {
-    pub windows: Vec<QuotaWindow>,
-    /// Unix seconds at completion of the bounded query.
-    pub fetched_at: u64,
-}
-
-#[derive(Clone, Debug, Deserialize, Serialize)]
-pub(super) struct AuthStatus {
-    pub kind: String,
-    pub account: Option<Account>,
-}
-
-#[derive(Debug, Clone, Deserialize, Serialize, agent_client_protocol::JsonRpcNotification)]
-#[notification(method = "_auth/status_update")]
-#[serde(rename_all = "camelCase")]
-pub(super) struct AuthNotification {
-    pub auth_status: AuthStatus,
-}
-
-/// Return None on an explicit stop. No panel lifecycle event starts browser login.
-pub(super) async fn authenticate(
-    connection: &ConnectionTo<Agent>,
-    status: &mut tokio::sync::watch::Receiver<Option<AuthStatus>>,
-    controls: &mut async_mpsc::UnboundedReceiver<Control>,
-    emit: &Emit,
-) -> Result<Option<Account>, agent_client_protocol::Error> {
-    let initial = tokio::select! {
-        result = wait_status(status, false) => result?,
-        _ = wait_for_stop(controls) => return Ok(None),
-    };
-    if initial.kind != "account" {
-        emit(AgentEvent::AuthenticationRequired);
-        loop {
-            match controls.recv().await {
-                Some(Control::Command(AgentCommand::Authenticate)) => break,
-                Some(Control::Stop) | None => return Ok(None),
-                _ => {}
-            }
-        }
-        emit(AgentEvent::Authenticating);
-        tokio::select! {
-            result = tokio::time::timeout(LOGIN_TIMEOUT,
-                connection.send_request(AuthenticateRequest::new("chat-gpt")).block_task()) => {
-                result.map_err(|_| internal("ChatGPT sign-in timed out. Try again."))?
-                    .map_err(|_| internal("ChatGPT sign-in did not complete. Try again."))?;
-            }
-            _ = wait_for_stop(controls) => return Ok(None),
-        }
-    }
-    // Notifications and the authenticate response may be dispatched separately.
-    // Wait for the confirmation instead of assuming its handler ran first.
-    let confirmed = tokio::select! {
-        result = wait_status(status, true) => result?,
-        _ = wait_for_stop(controls) => return Ok(None),
-    };
-    Ok(Some(confirmed.account.unwrap_or_default()))
-}
-
-async fn wait_for_stop(controls: &mut async_mpsc::UnboundedReceiver<Control>) {
-    while let Some(control) = controls.recv().await {
-        if matches!(control, Control::Stop) {
-            return;
-        }
-    }
-}
-
-async fn wait_status(
-    status: &mut tokio::sync::watch::Receiver<Option<AuthStatus>>,
-    require_account: bool,
-) -> Result<AuthStatus, agent_client_protocol::Error> {
-    tokio::time::timeout(HANDSHAKE_TIMEOUT, async {
-        loop {
-            if let Some(value) = status.borrow_and_update().clone() {
-                if !require_account || value.kind == "account" {
-                    return Ok(value);
-                }
-            }
-            status
-                .changed()
-                .await
-                .map_err(|_| internal("Codex account reporting stopped"))?;
-        }
-    })
-    .await
-    .map_err(|_| internal("Codex did not confirm its account in time"))?
-}
-
-pub(super) fn resolve(
-    launch: AgentLaunch,
-    find_cli: &dyn Fn(&str) -> Option<environment::DetectedTool>,
-) -> Result<ResolvedLaunch, String> {
-    if launch.agent_id.as_deref() != Some("codex-acp") || launch.provider.is_some() {
-        return Err(
-            "Official subscription access is only available for Codex, without an API provider"
-                .into(),
-        );
-    }
-    if !launch.cwd.is_absolute() {
-        return Err("The workspace path must be absolute".into());
-    }
-    let data = launch
-        .data_directory
-        .ok_or("The Agent install directory is not configured")?;
-    let agent = catalog::find("codex-acp").ok_or("Codex is unavailable")?;
-    if install::installed_version(&data, agent).is_none() {
-        return Err("Codex is not installed. Install it in Agent Settings.".into());
-    }
-    let cli = agent.cli.as_ref().ok_or("Codex CLI is unavailable")?;
-    let detected = find_cli(cli.command);
-    if let Some(issue) = install::cli_issue(cli, detected.as_ref()) {
-        return Err(issue);
-    }
-    let executable = detected.ok_or("Codex CLI is unavailable")?.path;
-    let codex_home = launch.codex_home;
-    if codex_home.as_ref().is_some_and(|home| !home.is_absolute()) {
-        // A relative path would resolve against the adapter's working directory
-        // and silently select a different account than the one the user chose.
-        return Err("The Codex account directory must be an absolute path".into());
-    }
-    let mut config = codex_session_config(None, launch.context_limits);
-    config["model_provider"] = json!("openai");
-    // Empty disables a saved openai_base_url override in Codex.
-    config["openai_base_url"] = json!("");
-    config["chatgpt_base_url"] = json!(CHATGPT_BASE_URL);
-    Ok(ResolvedLaunch {
-        command: install::installed_command(&data, agent),
-        args: launch.args,
-        cwd: launch.cwd,
-        // Override only this process's routing, preserving the user's CLI files,
-        // MCP servers and skills. Session model choices still come from Codex.
-        env: vec![
-            (
-                cli.path_env.into(),
-                executable.to_string_lossy().into_owned(),
-            ),
-            ("MODEL_PROVIDER".into(), "openai".into()),
-            ("CODEX_CONFIG".into(), config.to_string()),
-        ]
-        .into_iter()
-        .chain(codex_home.as_ref().map(|home| {
-            (
-                CODEX_HOME_ENVIRONMENT.into(),
-                home.to_string_lossy().into_owned(),
-            )
-        }))
-        .collect(),
-        gateway: None,
-        secret: String::new(),
-        subscription_cli: Some(executable),
-        claude_subscription: false,
-        codex_home,
-        claude_projects: None,
-    })
-}
-
-/// Change only inference routing for this process. Keeping the native backend
-/// suffix preserves Codex model discovery, compaction and backend capabilities.
-/// The ChatGPT login/quota URL and all authentication settings stay unchanged.
-pub(super) fn observe_model_calls(launch: &mut ResolvedLaunch, proxy: &str) -> Result<(), String> {
-    let (_, config) = launch
-        .env
-        .iter_mut()
-        .find(|(key, _)| key == "CODEX_CONFIG")
-        .ok_or("Codex subscription configuration is unavailable")?;
-    let mut value: Value = serde_json::from_str(config)
-        .map_err(|_| "Codex subscription configuration is unavailable")?;
-    value["openai_base_url"] = json!(format!("{proxy}/backend-api/codex"));
-    *config = value.to_string();
-    Ok(())
-}
-
-/// Prevent inherited API overrides from silently changing the selected billing source.
-/// Codex still owns account storage and refresh; CODEX_HOME remains untouched.
-pub(super) fn isolate_environment(command: &mut std::process::Command) {
-    for name in [
-        "OPENAI_API_KEY",
-        "CODEX_API_KEY",
-        "OPENAI_BASE_URL",
-        "CODEX_ACCESS_TOKEN",
-        "OPENAI_IDENTITY_TOKEN_FILE",
-        "OPENAI_WORKLOAD_IDENTITY_PROVIDER",
-        "MODEL_PROVIDER",
-        "CODEX_CONFIG",
-        "DEFAULT_AUTH_REQUEST",
-        "APP_SERVER_LOGS",
-    ] {
-        command.env_remove(name);
-    }
-}
-
-/// Own the probe tree even if its future is cancelled during a read or cleanup.
-pub(super) struct ProbeProcess(pub(super) tokio::process::Child);
-
-impl Drop for ProbeProcess {
-    fn drop(&mut self) {
-        if let Some(pid) = self.0.id() {
-            force_kill_tree(pid);
-        }
-    }
-}
-
-pub(super) async fn read_quota(
-    command: &Path,
-    cwd: &Path,
-    account: &Account,
-    codex_home: Option<&Path>,
-) -> Result<QuotaSnapshot, &'static str> {
-    let mut process = std::process::Command::new(command);
-    isolate_environment(&mut process);
-    if let Some(home) = codex_home {
-        // The probe must read the same account the adapter is signed in to.
-        process.env(CODEX_HOME_ENVIRONMENT, home);
-    }
-    process
-        .args([
-            "-c",
-            "model_provider=\"openai\"",
-            "-c",
-            "openai_base_url=\"\"",
-            "-c",
-        ])
-        .arg(format!("chatgpt_base_url=\"{CHATGPT_BASE_URL}\""))
-        .arg("app-server")
-        .current_dir(cwd)
-        .stdin(Stdio::piped())
-        .stdout(Stdio::piped())
-        .stderr(Stdio::null());
-    if let Some(path) = child_path(command, environment::search_path()) {
-        process.env("PATH", path);
-    }
-    #[cfg(unix)]
-    {
-        use std::os::unix::process::CommandExt;
-        process.process_group(0);
-    }
-    let mut process = tokio::process::Command::from(process);
-    #[cfg(windows)]
-    {
-        process.creation_flags(crate::CREATE_NO_WINDOW);
-    }
-    process.kill_on_drop(true);
-    let mut child = ProbeProcess(process.spawn().map_err(|_| "unavailable")?);
-    let result = async {
-        let mut input = child.0.stdin.take().ok_or("unavailable")?;
-        let mut output = BufReader::new(child.0.stdout.take().ok_or("unavailable")?);
-        exchange(&mut input, &mut output, account).await
-    };
-    let result = tokio::time::timeout(PROBE_TIMEOUT, result)
-        .await
-        .unwrap_or(Err("timeout"));
-    terminate_tree(&mut child.0).await;
-    result
-}
-
-async fn exchange(
-    input: &mut (impl AsyncWrite + Unpin),
-    output: &mut (impl AsyncBufRead + Unpin),
-    expected: &Account,
-) -> Result<QuotaSnapshot, &'static str> {
-    request(
-        input,
-        output,
-        1,
-        "initialize",
-        json!({"clientInfo": {"name": "lithe-quota", "version": "1"}}),
-    )
-    .await?;
-    input
-        .write_all(b"{\"method\":\"initialized\"}\n")
-        .await
-        .map_err(|_| "unavailable")?;
-    let account = request(
-        input,
-        output,
-        2,
-        "account/read",
-        json!({"refreshToken": false}),
-    )
-    .await?;
-    check_account(&account, expected)?;
-    let limits = request(input, output, 3, "account/rateLimits/read", Value::Null).await?;
-    // A CLI login in another terminal during the probe must not cross account data.
-    let account = request(
-        input,
-        output,
-        4,
-        "account/read",
-        json!({"refreshToken": false}),
-    )
-    .await?;
-    check_account(&account, expected)?;
-    Ok(QuotaSnapshot {
-        windows: windows(&limits)?,
-        fetched_at: std::time::SystemTime::now()
-            .duration_since(std::time::UNIX_EPOCH)
-            .map_err(|_| "unavailable")?
-            .as_secs(),
-    })
-}
-
-fn check_account(value: &Value, expected: &Account) -> Result<(), &'static str> {
-    let account = &value["account"];
-    if account["type"] != "chatgpt" {
-        return Err("unauthorized");
-    }
-    let email = account["email"].as_str().filter(|value| !value.is_empty());
-    if email.is_none() || expected.email.as_deref() != email {
-        return Err("accountChanged");
-    }
-    Ok(())
-}
-
-pub(super) async fn request(
-    input: &mut (impl AsyncWrite + Unpin),
-    output: &mut (impl AsyncBufRead + Unpin),
-    id: u64,
-    method: &str,
-    params: Value,
-) -> Result<Value, &'static str> {
-    let line = format!(
-        "{}\n",
-        json!({"id": id, "method": method, "params": params})
-    );
-    input
-        .write_all(line.as_bytes())
-        .await
-        .map_err(|_| "unavailable")?;
-    loop {
-        let mut line = Vec::new();
-        output
-            .take(MAX_REPLY_BYTES + 1)
-            .read_until(b'\n', &mut line)
-            .await
-            .map_err(|_| "unavailable")?;
-        if line.is_empty() {
-            return Err("unavailable");
-        }
-        if line.len() as u64 > MAX_REPLY_BYTES {
-            return Err("unparsable");
-        }
-        let reply: Value = serde_json::from_slice(&line).map_err(|_| "unparsable")?;
-        if reply.get("id").and_then(Value::as_u64) != Some(id) {
-            continue;
-        }
-        // Never expose upstream error text: it may contain paths or account data.
-        if reply.get("error").is_some() {
-            return Err("unavailable");
-        }
-        return reply.get("result").cloned().ok_or("unparsable");
-    }
-}
-
-/// Preserve provider window lengths, including Pro accounts whose primary is weekly.
-fn windows(value: &Value) -> Result<Vec<QuotaWindow>, &'static str> {
-    let mut snapshots = std::collections::BTreeMap::new();
-    if let Some(entries) = value["rateLimitsByLimitId"].as_object() {
-        for (id, snapshot) in entries {
-            if snapshot.is_object() {
-                snapshots.insert(id.as_str(), snapshot);
-            }
-        }
-    }
-    if snapshots.is_empty() {
-        let snapshot = &value["rateLimits"];
-        snapshots.insert(snapshot["limitId"].as_str().unwrap_or("codex"), snapshot);
-    }
-    let mut windows = Vec::new();
-    for (id, snapshot) in snapshots {
-        for field in ["primary", "secondary"] {
-            let window = &snapshot[field];
-            let Some(seconds) = window["windowDurationMins"]
-                .as_u64()
-                .and_then(|m| m.checked_mul(60))
-                .filter(|s| *s > 0)
-            else {
-                continue;
-            };
-            windows.push(QuotaWindow {
-                id: format!("{id}:{field}"),
-                name: snapshot["limitName"].as_str().unwrap_or(id).to_owned(),
-                limit_seconds: seconds,
-                used_percent: window["usedPercent"]
-                    .as_f64()
-                    .filter(|p| p.is_finite() && (0.0..=100.0).contains(p)),
-                resets_at: window["resetsAt"].as_i64().filter(|s| *s > 0),
-            });
-        }
-    }
-    if windows.is_empty() {
-        Err("unparsable")
-    } else {
-        Ok(windows)
-    }
-}
-
-#[cfg(test)]
-mod tests;
diff --git a/rust/lithe-agent-host/src/subscription/tests.rs b/rust/lithe-agent-host/src/subscription/tests.rs
deleted file mode 100644
index 388826cb..00000000
--- a/rust/lithe-agent-host/src/subscription/tests.rs
+++ /dev/null
@@ -1,166 +0,0 @@
-//! Regression coverage for account-scoped subscription observations.
-use super::*;
-
-#[test]
-fn windows_use_reported_duration_and_preserve_unknown_usage() {
-    let result = windows(&json!({"rateLimits": {
-        "primary": {"windowDurationMins":10080,"usedPercent":70,"resetsAt":1800000000},
-        "secondary": {"windowDurationMins":300,"usedPercent":null}
-    }}))
-    .unwrap();
-    assert_eq!(result[0].limit_seconds, 604800);
-    assert_eq!(result[1].limit_seconds, 18000);
-    assert_eq!(result[1].used_percent, None);
-}
-
-#[test]
-fn missing_duration_and_invalid_usage_never_become_unused_windows() {
-    assert!(windows(&json!({"rateLimits":{"primary":{"usedPercent":5}}})).is_err());
-    let result =
-        windows(&json!({"rateLimits":{"primary":{"windowDurationMins":300,"usedPercent":101}}}))
-            .unwrap();
-    assert_eq!(result[0].used_percent, None);
-}
-
-#[test]
-fn multiple_buckets_are_ordered_and_do_not_duplicate_legacy_snapshot() {
-    let window = json!({"primary":{"windowDurationMins":300,"usedPercent":50}});
-    let result =
-        windows(&json!({"rateLimits":window,"rateLimitsByLimitId":{"z":window,"a":window}}))
-            .unwrap();
-    assert_eq!(result.len(), 2);
-    assert_eq!(result[0].id, "a:primary");
-}
-
-#[test]
-fn quota_requires_the_same_subscription_identity() {
-    let expected = Account {
-        email: Some("person@example.test".into()),
-        plan: Some("plus".into()),
-    };
-    assert!(check_account(
-        &json!({"account":{"type":"chatgpt","email":"person@example.test"}}),
-        &expected
-    )
-    .is_ok());
-    assert_eq!(
-        check_account(&json!({"account":{"type":"apiKey"}}), &expected),
-        Err("unauthorized")
-    );
-    assert_eq!(
-        check_account(
-            &json!({"account":{"type":"chatgpt","email":"other@example.test"}}),
-            &expected
-        ),
-        Err("accountChanged")
-    );
-    assert_eq!(
-        check_account(&json!({"account":{"type":"chatgpt"}}), &expected),
-        Err("accountChanged")
-    );
-}
-
-#[test]
-fn subscription_environment_removes_api_overrides_without_changing_cli_home() {
-    let mut command = std::process::Command::new("fixture-codex");
-    command
-        .env("CODEX_HOME", "/fixture/codex-home")
-        .env("OPENAI_API_KEY", "fixture-key");
-    isolate_environment(&mut command);
-    let entries: std::collections::BTreeMap<_, _> = command.get_envs().collect();
-    assert_eq!(
-        entries.get(std::ffi::OsStr::new("OPENAI_API_KEY")),
-        Some(&None)
-    );
-    assert_eq!(
-        entries.get(std::ffi::OsStr::new("CODEX_HOME")),
-        Some(&Some(std::ffi::OsStr::new("/fixture/codex-home")))
-    );
-}
-
-#[tokio::test]
-async fn probe_only_reads_identity_and_limits_and_rechecks_account() {
-    let (client, server) = tokio::io::duplex(8192);
-    let (reader, mut writer) = tokio::io::split(client);
-    let mut reader = BufReader::new(reader);
-    let expected = Account {
-        email: Some("person@example.test".into()),
-        plan: None,
-    };
-    let peer = async {
-        let (reader, mut writer) = tokio::io::split(server);
-        let mut lines = BufReader::new(reader).lines();
-        for method in [
-            "initialize",
-            "initialized",
-            "account/read",
-            "account/rateLimits/read",
-            "account/read",
-        ] {
-            let request: Value =
-                serde_json::from_str(&lines.next_line().await.unwrap().unwrap()).unwrap();
-            assert_eq!(request["method"], method);
-            if method == "initialized" {
-                continue;
-            }
-            let result = match method {
-                "account/read" => {
-                    json!({"account":{"type":"chatgpt","email":"person@example.test"}})
-                }
-                "account/rateLimits/read" => {
-                    json!({"rateLimits":{"primary":{"usedPercent":25,"windowDurationMins":300}}})
-                }
-                _ => json!({}),
-            };
-            writer
-                .write_all(format!("{}\n", json!({"id":request["id"],"result":result})).as_bytes())
-                .await
-                .unwrap();
-        }
-    };
-    let (result, ()) = tokio::time::timeout(Duration::from_secs(5), async {
-        tokio::join!(exchange(&mut writer, &mut reader, &expected), peer)
-    })
-    .await
-    .expect("bounded in-memory protocol exchange");
-    assert_eq!(result.unwrap().windows[0].used_percent, Some(25.0));
-}
-
-#[cfg(unix)]
-#[tokio::test]
-async fn dropping_a_probe_closes_descendant_pipes() {
-    use std::os::unix::process::CommandExt;
-    let mut command = std::process::Command::new("sh");
-    command
-        .args(["-c", "sh -c 'printf ready; cat'; :"])
-        .stdin(Stdio::piped())
-        .stdout(Stdio::piped())
-        .stderr(Stdio::null())
-        .process_group(0);
-    let mut command = tokio::process::Command::from(command);
-    command.kill_on_drop(true);
-    let mut child = ProbeProcess(command.spawn().unwrap());
-    let input = child.0.stdin.take().unwrap();
-    let mut output = child.0.stdout.take().unwrap();
-    let mut ready = [0; 5];
-    tokio::time::timeout(Duration::from_secs(5), output.read_exact(&mut ready))
-        .await
-        .expect("bounded child readiness")
-        .unwrap();
-    assert_eq!(&ready, b"ready");
-    // Keep stdin open: only process-tree cleanup can release the inherited stdout.
-    drop(child);
-    let mut remaining = Vec::new();
-    tokio::time::timeout(Duration::from_secs(5), output.read_to_end(&mut remaining))
-        .await
-        .expect("probe cancellation killed descendants")
-        .unwrap();
-    drop(input);
-}
-
-#[tokio::test(start_paused = true)]
-async fn missing_account_confirmation_has_a_bounded_deadline() {
-    let (_sender, mut status) = tokio::sync::watch::channel(None);
-    let error = wait_status(&mut status, true).await.unwrap_err();
-    assert!(error.to_string().contains("confirm its account in time"));
-}
diff --git a/rust/lithe-agent-host/src/tests.rs b/rust/lithe-agent-host/src/tests.rs
deleted file mode 100644
index f8d6d86b..00000000
--- a/rust/lithe-agent-host/src/tests.rs
+++ /dev/null
@@ -1,4539 +0,0 @@
-use super::*;
-use serde_json::{json, Value};
-use tokio::io::{
-    AsyncBufReadExt, AsyncWriteExt, BufReader, DuplexStream, Lines, ReadHalf, WriteHalf,
-};
-
-const WAIT: Duration = Duration::from_secs(5);
-
-fn fixture() -> Value {
-    serde_json::from_str(include_str!("../../fixtures/agent/acp-events-v1.json"))
-        .expect("ACP event fixture")
-}
-
-fn provider() -> ProviderCredentials {
-    ProviderCredentials {
-        protocol: ProviderProtocol::Responses,
-        base_url: "https://gateway.example.com/v1".into(),
-        api_key: "test-key-123".into(),
-        name: Some("Example".into()),
-        model: None,
-        allow_insecure_http: false,
-    }
-}
-
-fn gateway() -> Option<GatewaySignIn> {
-    Some(GatewaySignIn {
-        protocol: ProviderProtocol::Responses,
-        base_url: "https://gateway.example.com/v1".into(),
-        headers: vec![("Authorization".into(), "Bearer test-key-123".into())],
-        provider_name: Some("Example".into()),
-        model: None,
-        native_recovery: false,
-    })
-}
-
-fn claude_route() -> GatewaySignIn {
-    let provider: ProviderCredentials =
-        serde_json::from_value(fixture()["upstream"]["claudeSessionRouting"]["provider"].clone())
-            .expect("Claude provider fixture");
-    GatewaySignIn {
-        protocol: provider.protocol,
-        base_url: provider.anthropic_base_url().expect("valid endpoint"),
-        headers: vec![("x-api-key".into(), provider.api_key)],
-        provider_name: provider.name,
-        model: provider.model,
-        native_recovery: false,
-    }
-}
-
-fn custom_launch(command: &str, provider: ProviderCredentials) -> AgentLaunch {
-    AgentLaunch {
-        agent_id: None,
-        command: Some(command.into()),
-        args: vec![],
-        cwd: std::env::temp_dir(),
-        data_directory: None,
-        provider: Some(provider),
-        authentication: AgentAuthentication::ApiKey,
-        observe_model_calls: false,
-        observe_subagents: false,
-        process_scope: None,
-        claude_config_dir: None,
-        context_limits: Default::default(),
-        codex_home: None,
-    }
-}
-
-/// Scripted ACP agent on the far side of an in-memory pipe. Each step is
-/// driven by the test, so message order is explicit and every read is bounded.
-struct MockAgent {
-    lines: Lines<BufReader<ReadHalf<DuplexStream>>>,
-    writer: WriteHalf<DuplexStream>,
-}
-
-impl MockAgent {
-    async fn next(&mut self) -> Value {
-        let line = tokio::time::timeout(WAIT, self.lines.next_line())
-            .await
-            .expect("client message before deadline")
-            .expect("readable pipe")
-            .expect("client kept the pipe open");
-        serde_json::from_str(&line).expect("JSON-RPC line")
-    }
-
-    async fn expect(&mut self, method: &str) -> Value {
-        let message = self.next().await;
-        assert_eq!(message["method"], method, "unexpected message {message}");
-        message
-    }
-
-    async fn write(&mut self, message: Value) {
-        self.writer
-            .write_all(format!("{message}\n").as_bytes())
-            .await
-            .expect("write to client");
-    }
-
-    async fn reply(&mut self, request: &Value, result: Value) {
-        self.write(json!({ "jsonrpc": "2.0", "id": request["id"], "result": result }))
-            .await;
-    }
-
-    async fn handshake(&mut self) {
-        self.handshake_with_steering(false, "mock-agent").await;
-    }
-
-    async fn handshake_with_steering(&mut self, supported: bool, name: &str) {
-        let initialize = self.expect("initialize").await;
-        self.reply(
-            &initialize,
-            json!({
-                "protocolVersion": 1,
-                "agentInfo": { "name": name, "version": "0.1.0" },
-                "_meta": { "steering": { "supported": supported } },
-                "agentCapabilities": { "loadSession": true, "sessionCapabilities": { "list": {} } },
-                "authMethods": [{ "id": "gateway", "name": "Custom model gateway" }],
-            }),
-        )
-        .await;
-        let authenticate = self.expect("authenticate").await;
-        self.reply(&authenticate, json!({})).await;
-    }
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn native_subagents_keep_child_permissions_owned_by_the_root_turn() {
-    let mut harness =
-        Harness::start_observing_subagents(false, gateway(), std::env::temp_dir(), true);
-    let initialize = harness.agent.expect("initialize").await;
-    assert!(
-        initialize["params"]["clientCapabilities"]["_meta"]["jetbrains"]["air"]["capabilities"]
-            .as_array()
-            .unwrap()
-            .contains(&json!("nativeSubagentSessions"))
-    );
-    harness.agent.reply(&initialize, json!({"protocolVersion":1,"agentCapabilities":{},"authMethods":[{"id":"gateway","name":"Gateway"}]})).await;
-    let auth = harness.agent.expect("authenticate").await;
-    harness.agent.reply(&auth, json!({})).await;
-    assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind":"prompt","sessionId":"session-1","text":"Inspect the sample"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    let fixture = fixture();
-    for name in [
-        "subagentSpawned",
-        "nestedSubagentSpawned",
-        "subagentToolCall",
-        "subagentMessageChunk",
-    ] {
-        let event = &fixture["events"][name];
-        harness.agent.write(json!({"jsonrpc":"2.0","method":"session/update","params":{"sessionId":event["sessionId"],"update":event["update"]}})).await;
-        assert_eq!(serde_json::to_value(harness.event().await).unwrap(), *event);
-    }
-    let mut request = fixture["events"]["permission"]["request"].clone();
-    request["sessionId"] = json!("child-2");
-    harness.agent.write(json!({"jsonrpc":"2.0","id":"child-permission","method":"session/request_permission","params":request})).await;
-    let AgentEvent::Permission {
-        session_id,
-        request_id,
-        request: received,
-    } = harness.event().await
-    else {
-        panic!("child permission must reach the owning turn")
-    };
-    assert_eq!(session_id, "session-1");
-    assert_eq!(received["sessionId"], "child-2");
-    answer_permission(&harness.permissions, &request_id, Some("allow_once".into())).unwrap();
-    let response = harness.agent.next().await;
-    assert_eq!(response["id"], "child-permission");
-    assert_eq!(response["result"]["outcome"]["optionId"], "allow_once");
-
-    // Parent cancellation must settle the child's next permission without a timer.
-    harness.agent.write(json!({"jsonrpc":"2.0","id":"pending-child","method":"session/request_permission","params":request})).await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::Permission { session_id, .. } if session_id == "session-1")
-    );
-    harness.send(json!({"kind":"cancel","sessionId":"session-1"}));
-    let mut cancelled_permission = false;
-    let mut cancelled_turn = false;
-    for _ in 0..2 {
-        let message = harness.agent.next().await;
-        cancelled_permission |= message["id"] == "pending-child"
-            && message["result"]["outcome"]["outcome"] == "cancelled";
-        cancelled_turn |=
-            message["method"] == "session/cancel" && message["params"]["sessionId"] == "session-1";
-    }
-    assert!(cancelled_permission && cancelled_turn);
-    assert!(
-        matches!(harness.event().await, AgentEvent::TurnCancelling { session_id } if session_id == "session-1")
-    );
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason":"cancelled"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn terminal_subagents_cancel_only_their_pending_permissions_and_release_quiet_tracking() {
-    for state in ["completed", "failed", "cancelled", "disconnected"] {
-        let mut harness =
-            Harness::start_observing_subagents(false, gateway(), std::env::temp_dir(), true);
-        harness.agent.handshake().await;
-        assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-        harness.open_session("session-1").await;
-        harness.send(json!({"kind":"prompt","sessionId":"session-1","text":"Inspect the sample"}));
-        let prompt = harness.agent.expect("session/prompt").await;
-        for (parent, child) in [
-            ("session-1", "child-1"),
-            ("child-1", "child-2"),
-            ("session-1", "sibling"),
-        ] {
-            harness.agent.write(json!({"jsonrpc":"2.0","method":"session/update","params":{
-                "sessionId":parent,"update":{"sessionUpdate":"subagent_spawned","subagentSessionId":child,
-                    "name":"Explore","task":"Inspect the sample","capabilities":{}}
-            }})).await;
-            assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-        }
-        let mut requests = Vec::new();
-        for source in ["child-1", "child-2", "session-1", "sibling"] {
-            let mut request = fixture()["events"]["permission"]["request"].clone();
-            request["sessionId"] = json!(source);
-            harness.agent.write(json!({"jsonrpc":"2.0","id":source,"method":"session/request_permission","params":request})).await;
-            let AgentEvent::Permission {
-                session_id,
-                request_id,
-                ..
-            } = harness.event().await
-            else {
-                panic!("each live source must enter the root permission queue");
-            };
-            assert_eq!(session_id, "session-1");
-            requests.push(request_id);
-        }
-        // End an ancestor while the root prompt stays outstanding. Both its
-        // own and its descendant's requests must settle without user input.
-        harness
-            .agent
-            .write(json!({"jsonrpc":"2.0","method":"session/update","params":{
-                "sessionId":"session-1","update":{"sessionUpdate":"subagent_state_update",
-                    "subagentSessionId":"child-1","state":state}
-            }}))
-            .await;
-        assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-        let mut cancelled = std::collections::BTreeSet::new();
-        for _ in 0..2 {
-            let response = harness.agent.next().await;
-            assert_eq!(response["result"]["outcome"]["outcome"], "cancelled");
-            cancelled.insert(response["id"].as_str().unwrap().to_owned());
-        }
-        assert_eq!(
-            cancelled,
-            ["child-1".to_owned(), "child-2".to_owned()].into()
-        );
-        assert_eq!(harness.permissions.lock().unwrap().len(), 2);
-        for id in &requests[..2] {
-            assert!(
-                answer_permission(&harness.permissions, id, Some("allow_once".into())).is_err()
-            );
-        }
-        let mut late = fixture()["events"]["permission"]["request"].clone();
-        late["sessionId"] = json!("child-2");
-        harness.agent.write(json!({"jsonrpc":"2.0","id":"late-child","method":"session/request_permission","params":late})).await;
-        let response = harness.agent.next().await;
-        assert_eq!(response["id"], "late-child");
-        assert_eq!(response["result"]["outcome"]["outcome"], "cancelled");
-        tokio::time::advance(Duration::from_secs(60 * 60)).await;
-        assert!(
-            harness.events.try_recv().is_err(),
-            "root and sibling permissions still suppress quiet notices"
-        );
-        for (id, source) in requests[2..].iter().zip(["session-1", "sibling"]) {
-            answer_permission(&harness.permissions, id, Some("allow_once".into())).unwrap();
-            let response = harness.agent.next().await;
-            assert_eq!(response["id"], source);
-            assert_eq!(response["result"]["outcome"]["optionId"], "allow_once");
-        }
-        tokio::time::advance(prompt_retry::quiet_notice_delay()).await;
-        assert!(
-            matches!(
-                harness.event().await,
-                AgentEvent::TurnActivity { quiet: true, .. }
-            ),
-            "cancelled child waits must release the root's pending-permission count"
-        );
-        harness
-            .agent
-            .reply(&prompt, json!({"stopReason":"end_turn"}))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn steering_injects_into_the_running_prompt_and_keeps_its_completion() {
-    let mut harness = Harness::start();
-    harness
-        .agent
-        .handshake_with_steering(true, "mock-agent")
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::Ready {
-            can_steer: true,
-            ..
-        }
-    ));
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind":"prompt", "sessionId":"session-1", "text":"Inspect everything"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    harness.send(json!({"kind":"steer", "token":"steer-1", "sessionId":"session-1", "text":"Only inspect login"}));
-    let steer = harness.agent.expect("_session/steering").await;
-    assert_eq!(steer["params"]["prompt"][0]["text"], "Only inspect login");
-    assert_eq!(
-        steer["params"]["_meta"]["steering"]["idleBehavior"],
-        "promptRequired"
-    );
-    harness
-        .agent
-        .reply(&steer, json!({"outcome":"injected"}))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::SteeringResult { outcome, .. } if outcome == "injected")
-    );
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason":"end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn steering_rejection_does_not_finish_or_replay_the_original_prompt() {
-    let mut harness = Harness::start();
-    harness
-        .agent
-        .handshake_with_steering(true, "mock-agent")
-        .await;
-    harness.event().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind":"prompt", "sessionId":"session-1", "text":"Inspect"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    harness.send(
-        json!({"kind":"steer", "token":"steer-1", "sessionId":"session-1", "text":"Supplement"}),
-    );
-    let steer = harness.agent.expect("_session/steering").await;
-    harness
-        .agent
-        .reply(&steer, json!({"outcome":"failed"}))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::SteeringResult { outcome, .. } if outcome == "failed")
-    );
-    harness.send(json!({"kind":"cancel", "sessionId":"session-1"}));
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason":"cancelled"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn steering_completion_race_publishes_delivery_before_terminal_event() {
-    let mut harness = Harness::start();
-    harness
-        .agent
-        .handshake_with_steering(true, "mock-agent")
-        .await;
-    harness.event().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind":"prompt", "sessionId":"session-1", "text":"Inspect"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    harness.send(
-        json!({"kind":"steer", "token":"steer-1", "sessionId":"session-1", "text":"Supplement"}),
-    );
-    let steer = harness.agent.expect("_session/steering").await;
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason":"end_turn"}))
-        .await;
-    harness
-        .agent
-        .reply(
-            &steer,
-            json!({"outcome":"promptRequired", "reason":"noRunningTurn"}),
-        )
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::SteeringResult { outcome, .. } if outcome == "promptRequired")
-    );
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn steering_when_idle_or_unsupported_never_sends_an_extension() {
-    for supported in [false, true] {
-        let mut harness = Harness::start();
-        harness
-            .agent
-            .handshake_with_steering(supported, "mock-agent")
-            .await;
-        harness.event().await;
-        harness.send(json!({"kind":"steer", "token":"steer-1", "sessionId":"session-1", "text":"Supplement"}));
-        assert!(
-            matches!(harness.event().await, AgentEvent::SteeringResult { outcome, .. }
-            if outcome == if supported { "promptRequired" } else { "failed" })
-        );
-        // The next wire request is session creation, not an unowned prompt.
-        harness.open_session("session-2").await;
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn steering_codex_commands_use_owned_prompts_without_a_detached_turn() {
-    let fixture = fixture();
-    let attached_command = &fixture["commands"]["nativeCommandWithFiles"];
-    for (command, files) in [
-        ("/status", json!([])),
-        ("  \n/status", json!([])),
-        ("/compact keep API details", json!([])),
-        (
-            "/status",
-            json!([{"uri":"file:///fixture/README.md", "name":"README.md"}]),
-        ),
-        (
-            attached_command["text"].as_str().unwrap(),
-            attached_command["files"].clone(),
-        ),
-    ] {
-        let mut harness = Harness::start();
-        harness
-            .agent
-            .handshake_with_steering(true, "@agentclientprotocol/codex-acp")
-            .await;
-        harness.event().await;
-        harness.open_session("session-1").await;
-        harness.send(json!({"kind":"prompt", "sessionId":"session-1", "text":"Inspect"}));
-        let original = harness.agent.expect("session/prompt").await;
-
-        // Codex 1.13.1 can answer command-only steering with startedNewTurn
-        // without ever publishing active -> idle. Never send that extension:
-        // leave the command unconsumed until the original prompt completes.
-        harness.send(json!({"kind":"steer", "token":"command", "sessionId":"session-1", "text":command, "files":files}));
-        assert!(matches!(harness.event().await,
-            AgentEvent::SteeringResult { token, outcome, .. }
-                if token == "command" && outcome == "promptRequired"));
-        harness
-            .agent
-            .reply(&original, json!({"stopReason":"end_turn"}))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-
-        harness
-            .send(json!({"kind":"prompt", "sessionId":"session-1", "text":command, "files":files}));
-        // Any unexpected _session/steering would be the next wire message.
-        let prompt = harness.agent.expect("session/prompt").await;
-        let mut expected = vec![json!({"type":"text", "text":command})];
-        for file in files.as_array().unwrap() {
-            expected.push(json!({"type":"resource_link", "uri":file["uri"], "name":file["name"]}));
-        }
-        assert_eq!(prompt["params"]["prompt"], json!(expected));
-        harness
-            .agent
-            .reply(&prompt, json!({"stopReason":"end_turn"}))
-            .await;
-        // There are no native model-turn status events for the command. Its
-        // ACP response alone must unlock the session and keep it connected.
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-        harness
-            .send(json!({"kind":"prompt", "sessionId":"session-1", "text":"Continue inspecting"}));
-        let next = harness.agent.expect("session/prompt").await;
-        harness
-            .agent
-            .reply(&next, json!({"stopReason":"end_turn"}))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn steering_codex_detached_continuation_waits_for_its_native_idle() {
-    let mut harness = Harness::start();
-    harness
-        .agent
-        .handshake_with_steering(true, "@agentclientprotocol/codex-acp")
-        .await;
-    harness.event().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind":"prompt", "sessionId":"session-1", "text":"Inspect"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    let status = |kind| {
-        json!({"jsonrpc":"2.0", "method":"session/update", "params":{
-            "sessionId":"session-1", "update":{"sessionUpdate":"session_info_update", "_meta":{"codex":{"threadStatus":{"type":kind}}}}
-        }})
-    };
-    harness.agent.write(status("active")).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    harness.send(
-        json!({"kind":"steer", "token":"steer-1", "sessionId":"session-1", "text":"Supplement"}),
-    );
-    let steer = harness.agent.expect("_session/steering").await;
-    harness.agent.write(status("idle")).await;
-    harness.agent.write(status("idle")).await;
-    // A successful continuation must not inherit the original prompt's error.
-    harness
-        .agent
-        .write(json!({"jsonrpc":"2.0", "id":prompt["id"],
-        "error":{"code":-32603, "message":"Original turn failed"}}))
-        .await;
-    harness.agent.write(status("active")).await;
-    harness
-        .agent
-        .reply(&steer, json!({"outcome":"startedNewTurn"}))
-        .await;
-    for _ in 0..3 {
-        assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    }
-    assert!(
-        matches!(harness.event().await, AgentEvent::SteeringResult { outcome, .. } if outcome == "injected")
-    );
-    // Stop must still reach the continuation after the original prompt returned.
-    harness.send(json!({"kind":"cancel", "sessionId":"session-1"}));
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    harness.agent.write(status("idle")).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { usage: None, .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn steering_unconfirmed_delivery_closes_the_connection_without_replay() {
-    let mut harness = Harness::start();
-    harness
-        .agent
-        .handshake_with_steering(true, "mock-agent")
-        .await;
-    harness.event().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind":"prompt", "sessionId":"session-1", "text":"Inspect"}));
-    harness.agent.expect("session/prompt").await;
-    harness.send(
-        json!({"kind":"steer", "token":"steer-1", "sessionId":"session-1", "text":"Supplement"}),
-    );
-    harness.agent.expect("_session/steering").await;
-    tokio::time::advance(SESSION_REQUEST_TIMEOUT + Duration::from_secs(1)).await;
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .expect("unknown delivery terminates within the local bound")
-        .expect("connection task joined");
-    assert!(result
-        .unwrap_err()
-        .contains("did not confirm the supplementary message"));
-}
-
-struct Harness {
-    agent: MockAgent,
-    controls: async_mpsc::UnboundedSender<Control>,
-    events: async_mpsc::UnboundedReceiver<AgentEvent>,
-    permissions: PendingPermissions,
-    connection: tokio::task::JoinHandle<Result<(), String>>,
-}
-
-impl Drop for Harness {
-    fn drop(&mut self) {
-        self.connection.abort();
-    }
-}
-
-impl Harness {
-    fn start() -> Self {
-        Self::start_with(false)
-    }
-
-    fn start_with(subscription: bool) -> Self {
-        Self::start_with_route(subscription, if subscription { None } else { gateway() })
-    }
-
-    fn start_with_route(subscription: bool, route: Option<GatewaySignIn>) -> Self {
-        Self::start_in_workspace(subscription, route, std::env::temp_dir())
-    }
-
-    fn start_in_workspace(subscription: bool, route: Option<GatewaySignIn>, cwd: PathBuf) -> Self {
-        Self::start_observing_subagents(subscription, route, cwd, false)
-    }
-
-    fn start_observing_subagents(
-        subscription: bool,
-        route: Option<GatewaySignIn>,
-        cwd: PathBuf,
-        observe_subagents: bool,
-    ) -> Self {
-        let (client, peer) = tokio::io::duplex(64 * 1024);
-        let (client_reader, client_writer) = tokio::io::split(client);
-        let (peer_reader, peer_writer) = tokio::io::split(peer);
-        let (controls, receiver) = async_mpsc::unbounded_channel();
-        let (event_tx, events) = async_mpsc::unbounded_channel();
-        let permissions: PendingPermissions = Arc::new(Mutex::new(HashMap::new()));
-        let connection = tokio::spawn(run_connection(
-            ByteStreams::new(client_writer.compat_write(), client_reader.compat()),
-            cwd,
-            route,
-            subscription.then(|| PathBuf::from("/fixture/codex")),
-            None,
-            false,
-            None,
-            None,
-            None,
-            observe_subagents,
-            receiver,
-            TurnActivity {
-                permissions: permissions.clone(),
-                turns: Arc::new(Mutex::new(HashMap::new())),
-                calls_in_flight: Arc::default(),
-            },
-            Arc::new(move |event| {
-                let _ = event_tx.send(event);
-            }),
-        ));
-        Self {
-            agent: MockAgent {
-                lines: BufReader::new(peer_reader).lines(),
-                writer: peer_writer,
-            },
-            controls,
-            events,
-            permissions,
-            connection,
-        }
-    }
-
-    async fn ready() -> Self {
-        let mut harness = Self::start();
-        harness.agent.handshake().await;
-        assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-        harness
-    }
-
-    async fn ready_claude() -> Self {
-        let mut harness = Self::start_with_route(false, Some(claude_route()));
-        let initialize = harness.agent.expect("initialize").await;
-        harness
-            .agent
-            .reply(&initialize, json!({"protocolVersion": 1}))
-            .await;
-        assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-        harness
-    }
-
-    async fn ready_codex() -> Self {
-        let mut route = gateway().unwrap();
-        route.native_recovery = true;
-        let mut harness = Self::start_with_route(false, Some(route));
-        harness.agent.handshake().await;
-        assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-        harness
-    }
-
-    fn send(&self, command: Value) {
-        let command = serde_json::from_value(command).expect("command JSON");
-        if let AgentCommand::Cancel { session_id } = &command {
-            reject_pending_permissions(&self.permissions, Some(session_id));
-        }
-        self.controls
-            .send(Control::Command(command))
-            .expect("connection running");
-    }
-
-    async fn event(&mut self) -> AgentEvent {
-        // test-stability: allow(rust-unbounded-receive) reason: tokio's async receiver has no recv_timeout; tokio::time::timeout(WAIT) bounds this await without blocking the executor.
-        tokio::time::timeout(WAIT, self.events.recv())
-            .await
-            .expect("event before deadline")
-            .expect("event channel open")
-    }
-
-    async fn open_session(&mut self, session_id: &str) {
-        self.send(json!({ "kind": "newSession", "token": session_id }));
-        let request = self.agent.expect("session/new").await;
-        self.agent
-            .reply(&request, json!({ "sessionId": session_id }))
-            .await;
-        assert!(matches!(
-            self.event().await,
-            AgentEvent::SessionCreated { .. }
-        ));
-    }
-
-    async fn stop(mut self) -> Result<(), String> {
-        self.controls
-            .send(Control::Stop)
-            .expect("connection running");
-        tokio::time::timeout(WAIT, &mut self.connection)
-            .await
-            .expect("connection stops before deadline")
-            .expect("connection task completes")
-    }
-}
-
-#[test]
-fn serialized_events_match_the_shared_fixture() {
-    let fixture = fixture();
-    let events = &fixture["events"];
-    let cases = [
-        (
-            "ready",
-            AgentEvent::Ready {
-                agent_name: Some("example-agent".into()),
-                agent_version: Some("1.0.0".into()),
-                can_load_sessions: true,
-                can_list_sessions: true,
-                can_list_archived_sessions: false,
-                can_steer: false,
-            },
-        ),
-        (
-            "steeringResult",
-            AgentEvent::SteeringResult {
-                token: "steer-1".into(),
-                session_id: "session-1".into(),
-                outcome: "injected".into(),
-                message: None,
-            },
-        ),
-        (
-            "sessionCreated",
-            AgentEvent::SessionCreated {
-                token: "token-1".into(),
-                session_id: "session-1".into(),
-                config_options: None,
-            },
-        ),
-        (
-            "sessionLoaded",
-            AgentEvent::SessionLoaded {
-                token: "token-2".into(),
-                session_id: "session-1".into(),
-                config_options: None,
-            },
-        ),
-        (
-            "sessionsPage",
-            AgentEvent::SessionsPage {
-                token: "token-3".into(),
-                sessions: vec![AgentSessionSummary {
-                    session_id: "session-1".into(),
-                    title: Some("Explain this project".into()),
-                    updated_at: Some("2026-09-25T10:00:00Z".into()),
-                    model_provider: None,
-                }],
-            },
-        ),
-        (
-            "sessions",
-            AgentEvent::Sessions {
-                token: "token-3".into(),
-                sessions: vec![
-                    AgentSessionSummary {
-                        session_id: "session-1".into(),
-                        title: Some("Explain this project".into()),
-                        updated_at: Some("2026-09-25T10:00:00Z".into()),
-                        model_provider: None,
-                    },
-                    AgentSessionSummary {
-                        session_id: "session-2".into(),
-                        title: None,
-                        updated_at: None,
-                        model_provider: None,
-                    },
-                ],
-            },
-        ),
-        (
-            "archivedSessions",
-            AgentEvent::ArchivedSessions {
-                token: "archived-1".into(),
-                sessions: vec![AgentSessionSummary {
-                    session_id: "archived-session-1".into(),
-                    title: Some("Earlier refactor".into()),
-                    updated_at: Some("2026-09-20T08:30:00Z".into()),
-                    model_provider: None,
-                }],
-                complete: true,
-            },
-        ),
-        (
-            "sessionUnarchived",
-            AgentEvent::SessionUnarchived {
-                token: "unarchive-1".into(),
-                session_id: "archived-session-1".into(),
-            },
-        ),
-        (
-            "turnFinished",
-            AgentEvent::TurnFinished {
-                session_id: "session-1".into(),
-                stop_reason: "end_turn".into(),
-                usage: None,
-            },
-        ),
-        (
-            "turnActivityQuiet",
-            AgentEvent::TurnActivity {
-                session_id: "session-1".into(),
-                quiet: true,
-            },
-        ),
-        (
-            "turnActivityResumed",
-            AgentEvent::TurnActivity {
-                session_id: "session-1".into(),
-                quiet: false,
-            },
-        ),
-        (
-            "turnRetrying",
-            AgentEvent::TurnRetrying {
-                session_id: "session-1".into(),
-                turn_id: "host-turn-1".into(),
-                attempt: 2,
-                max_attempts: Some(5),
-            },
-        ),
-        (
-            "turnRecovering",
-            AgentEvent::TurnRetrying {
-                session_id: "session-1".into(),
-                turn_id: "native-turn-1".into(),
-                attempt: 6,
-                max_attempts: None,
-            },
-        ),
-        (
-            "turnCancelled",
-            AgentEvent::TurnFinished {
-                session_id: "session-1".into(),
-                stop_reason: "cancelled".into(),
-                usage: None,
-            },
-        ),
-        (
-            "turnFinishedWithUsage",
-            prompt::finished(
-                "session-1".into(),
-                serde_json::from_value(fixture["upstream"]["promptResponseWithUsage"].clone())
-                    .unwrap(),
-            ),
-        ),
-        (
-            "requestFailed",
-            failed(
-                None,
-                Some("session-1".into()),
-                "The Agent is still responding in this conversation".into(),
-            ),
-        ),
-        (
-            "stopped",
-            AgentEvent::Stopped {
-                message: Some("The Agent connection closed unexpectedly".into()),
-            },
-        ),
-    ];
-    for (name, event) in cases {
-        assert_eq!(
-            serde_json::to_value(event).unwrap(),
-            events[name],
-            "fixture event {name}"
-        );
-    }
-    let permission = &events["permission"];
-    assert_eq!(
-        serde_json::to_value(AgentEvent::Permission {
-            session_id: "session-1".into(),
-            request_id: "permission-1".into(),
-            request: permission["request"].clone(),
-        })
-        .unwrap(),
-        *permission
-    );
-    // Update payloads are forwarded verbatim, so the fixture must be valid ACP
-    // wire format that the SDK round-trips unchanged.
-    for name in [
-        "userMessageChunk",
-        "agentMessageChunk",
-        "toolCall",
-        "toolCallUpdate",
-        "fileEdit",
-        "claudeFileCreated",
-        "claudeFileWriteUpdated",
-        "sessionInfo",
-        "codexRetry",
-        "usageUpdate",
-        "historicalUsageUpdate",
-        "agentThoughtChunk",
-        "plan",
-        "availableCommands",
-        "currentModeUpdate",
-        "claudeAutoModeNotice",
-    ] {
-        let update = &events[name]["update"];
-        let parsed: agent_client_protocol::schema::v1::SessionUpdate =
-            serde_json::from_value(update.clone())
-                .unwrap_or_else(|error| panic!("{name}: {error}"));
-        assert_eq!(
-            &serde_json::to_value(parsed).unwrap(),
-            update,
-            "fixture update {name}"
-        );
-    }
-    let request: RequestPermissionRequest =
-        serde_json::from_value(permission["request"].clone()).expect("ACP permission request");
-    assert_eq!(
-        serde_json::to_value(request).unwrap(),
-        permission["request"]
-    );
-    assert_eq!(
-        stop_reason_name(&agent_client_protocol::schema::v1::StopReason::EndTurn),
-        "end_turn"
-    );
-}
-
-#[test]
-fn management_status_matches_the_shared_fixture() {
-    let fixture: Value = serde_json::from_str(include_str!(
-        "../../fixtures/agent/agent-management-v1.json"
-    ))
-    .expect("agent management fixture");
-    let data = std::env::temp_dir().join(format!("lithe-status-{}", std::process::id()));
-    struct Cleanup(std::path::PathBuf);
-    impl Drop for Cleanup {
-        fn drop(&mut self) {
-            let _ = std::fs::remove_dir_all(&self.0);
-        }
-    }
-    let _cleanup = Cleanup(data.clone());
-    let _ = std::fs::remove_dir_all(&data);
-    fake_install(&data, "codex-acp");
-    let tool = |version: &str, name: &str| environment::DetectedTool {
-        version: version.into(),
-        path: format!("/opt/example/node/bin/{name}").into(),
-    };
-    let status = install::status_with(
-        &data,
-        environment::RuntimeEnvironment {
-            node: Some(tool("20.11.0", "node")),
-            npm: Some(tool("10.2.4", "npm")),
-            used_login_shell: true,
-        },
-        &|command| (command == "codex").then(|| tool("0.160.1", "codex")),
-        &|cli| {
-            Some(
-                serde_json::from_value(
-                    fixture["cliInstallations"][if cli.command == "codex" {
-                        "npm"
-                    } else {
-                        "missing"
-                    }]
-                    .clone(),
-                )
-                .unwrap(),
-            )
-        },
-    );
-    assert_eq!(
-        serde_json::to_value(status).unwrap(),
-        fixture["responses"]["status"]
-    );
-    for agent in catalog::CATALOG {
-        fake_install(&data, agent.id);
-        for (installed, expected) in [
-            ("0.0.0".to_string(), Some(true)),
-            (agent.version.to_string(), Some(false)),
-            ("9999.0.0".to_string(), Some(false)),
-            (format!("{}-beta.1", agent.version), Some(true)),
-            (format!("{}+local", agent.version), Some(false)),
-            ("unreadable".to_string(), None),
-        ] {
-            std::fs::write(
-                data.join("agents").join(agent.id).join("lithe-agent.json"),
-                serde_json::to_vec(&json!({"id": agent.id, "version": installed})).unwrap(),
-            )
-            .unwrap();
-            let status = install::status_with(
-                &data,
-                environment::RuntimeEnvironment {
-                    node: None,
-                    npm: None,
-                    used_login_shell: true,
-                },
-                &|_| None,
-                &|_| None,
-            );
-            let actual = status
-                .agents
-                .iter()
-                .find(|status| status.id == agent.id)
-                .unwrap();
-            assert_eq!(
-                actual.update_available, expected,
-                "{} {installed}",
-                agent.id
-            );
-        }
-    }
-    let _ = std::fs::remove_dir_all(&data);
-}
-
-#[test]
-fn fixture_commands_parse_as_platform_commands() {
-    let fixture = fixture();
-    let commands = fixture["commands"].as_object().expect("commands");
-    for (name, command) in commands {
-        serde_json::from_value::<AgentCommand>(command.clone())
-            .unwrap_or_else(|error| panic!("command {name}: {error}"));
-    }
-    assert!(matches!(
-        serde_json::from_value(commands["denyPermission"].clone()).unwrap(),
-        AgentCommand::Permission {
-            option_id: None,
-            ..
-        }
-    ));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn handshake_signs_in_through_the_gateway_with_the_user_key() {
-    let mut harness = Harness::start();
-    let initialize = harness.agent.expect("initialize").await;
-    assert_eq!(
-        initialize["params"]["clientCapabilities"]["auth"]["_meta"]["gateway"],
-        true
-    );
-    harness
-        .agent
-        .reply(
-            &initialize,
-            json!({
-                "protocolVersion": 1,
-                "agentInfo": { "name": "mock-agent", "version": "0.1.0" },
-                "agentCapabilities": { "loadSession": true, "sessionCapabilities": { "list": {} } },
-                "authMethods": [
-                    { "id": "chat-gpt", "name": "ChatGPT" },
-                    { "id": "gateway", "name": "Custom model gateway" }
-                ],
-            }),
-        )
-        .await;
-    let authenticate = harness.agent.expect("authenticate").await;
-    let params = &authenticate["params"];
-    assert_eq!(params["methodId"], "gateway");
-    assert_eq!(
-        params["_meta"]["gateway"]["baseUrl"],
-        "https://gateway.example.com/v1"
-    );
-    assert_eq!(
-        params["_meta"]["gateway"]["headers"]["Authorization"],
-        "Bearer test-key-123"
-    );
-    assert_eq!(params["_meta"]["gateway"]["providerName"], "Example");
-    harness.agent.reply(&authenticate, json!({})).await;
-    match harness.event().await {
-        AgentEvent::Ready {
-            agent_name,
-            can_load_sessions,
-            can_list_sessions,
-            ..
-        } => {
-            assert_eq!(agent_name.as_deref(), Some("mock-agent"));
-            assert!(can_load_sessions && can_list_sessions);
-        }
-        other => panic!("expected ready, got {other:?}"),
-    }
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test]
-async fn negotiated_session_notices_are_forwarded_without_becoming_replies() {
-    let mut harness = Harness::start_with_route(false, Some(claude_route()));
-    let initialize = harness.agent.expect("initialize").await;
-    assert_eq!(
-        initialize["params"]["clientCapabilities"]["session"]["notices"],
-        json!({})
-    );
-    harness
-        .agent
-        .reply(&initialize, json!({"protocolVersion": 1}))
-        .await;
-    assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-    harness.open_session("session-1").await;
-    let expected = fixture()["events"]["claudeAutoModeNotice"].clone();
-    harness
-        .agent
-        .write(json!({
-            "jsonrpc": "2.0", "method": "session/update",
-            "params": {"sessionId": "session-1", "update": expected["update"]}
-        }))
-        .await;
-    assert_eq!(
-        serde_json::to_value(harness.event().await).unwrap(),
-        expected
-    );
-    harness.stop().await.unwrap();
-}
-
-#[test]
-fn claude_session_routing_clears_conflicting_credentials_and_preserves_sdk_options() {
-    let mut route = claude_route();
-    let meta = session_routing::metadata(Some(&route)).unwrap().unwrap();
-    assert_eq!(
-        json!(meta),
-        fixture()["upstream"]["claudeSessionRouting"]["meta"]
-    );
-    let options = &meta["claudeCode"]["options"];
-    assert!(options.get("permissionMode").is_none());
-    assert!(options.get("tools").is_none());
-    // No explicit model keeps the upstream default rather than inventing one.
-    route.model = Some("  ".into());
-    let meta = session_routing::metadata(Some(&route)).unwrap().unwrap();
-    assert!(meta["claudeCode"]["options"].get("model").is_none());
-    assert!(session_routing::metadata(gateway().as_ref())
-        .unwrap()
-        .is_none());
-    assert!(session_routing::metadata(None).unwrap().is_none());
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn claude_authentication_failure_ends_the_turn_and_allows_an_explicit_retry() {
-    let mut harness = Harness::ready_claude().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let first = harness.agent.expect("session/prompt").await;
-    harness
-        .agent
-        .write(json!({
-            "jsonrpc": "2.0", "id": first["id"],
-            "error": {
-                "code": -32603,
-                "message": "Failed to authenticate. API Error: 401 Invalid API key",
-                "data": {"errorKind": "authentication_failed"}
-            }
-        }))
-        .await;
-    match harness.event().await {
-        AgentEvent::RequestFailed {
-            token,
-            session_id,
-            message,
-        } => {
-            assert!(token.is_none());
-            assert_eq!(session_id.as_deref(), Some("session-1"));
-            assert!(message.contains("401 Invalid API key"));
-        }
-        other => panic!("expected terminal authentication failure, got {other:?}"),
-    }
-    // Only the user's next command starts another turn, after the failed turn
-    // has released its busy state; the host never resends the rejected prompt.
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "retry"}));
-    let retry = harness.agent.expect("session/prompt").await;
-    assert_eq!(retry["params"]["prompt"][0]["text"], "retry");
-    harness
-        .agent
-        .reply(&retry, json!({"stopReason": "end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-async fn reject_prompt(harness: &mut Harness, request: &Value, kind: &str) {
-    harness
-        .agent
-        .write(json!({
-            "jsonrpc": "2.0", "id": request["id"],
-            "error": {"code": -32603, "message": "API Error: 503 No available channel",
-                      "data": {"errorKind": kind}}
-        }))
-        .await;
-}
-
-#[tokio::test(start_paused = true)]
-async fn claude_temporary_errors_attempt_five_times_without_upstream_backoff() {
-    for kind in ["rate_limit", "overloaded", "server_error", "transport_lost"] {
-        let mut harness = Harness::ready_claude().await;
-        harness.open_session("session-1").await;
-        harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-        for attempt in 1..=5 {
-            let request = harness.agent.expect("session/prompt").await;
-            assert_eq!(request["params"]["prompt"][0]["text"], "first");
-            reject_prompt(&mut harness, &request, kind).await;
-            harness.agent.expect("session/cancel").await;
-            if attempt < 5 {
-                match harness.event().await {
-                    AgentEvent::TurnRetrying {
-                        session_id,
-                        attempt: next,
-                        max_attempts,
-                        ..
-                    } => {
-                        assert_eq!(session_id, "session-1");
-                        assert_eq!(next, attempt + 1);
-                        assert_eq!(max_attempts, Some(5));
-                    }
-                    other => panic!("retry before final failure: {other:?}"),
-                }
-                tokio::time::advance(Duration::from_millis(500 << (attempt - 1))).await;
-            } else {
-                assert!(matches!(
-                    harness.event().await,
-                    AgentEvent::RequestFailed { .. }
-                ));
-            }
-        }
-        harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "explicit retry"}));
-        let retry = harness.agent.expect("session/prompt").await;
-        harness
-            .agent
-            .reply(&retry, json!({"stopReason": "end_turn"}))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(start_paused = true)]
-async fn claude_permanent_and_unknown_errors_never_automatically_retry() {
-    for kind in [
-        "authentication_failed",
-        "invalid_request",
-        "model_not_found",
-        "billing_error",
-        "verification_required",
-        "unknown",
-    ] {
-        let mut harness = Harness::ready_claude().await;
-        harness.open_session("session-1").await;
-        harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-        let first = harness.agent.expect("session/prompt").await;
-        reject_prompt(&mut harness, &first, kind).await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::RequestFailed { .. }
-        ));
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(start_paused = true)]
-async fn claude_air_terminal_failure_is_not_success_and_can_recover() {
-    let mut harness = Harness::ready_claude().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let first = harness.agent.expect("session/prompt").await;
-    harness
-        .agent
-        .reply(
-            &first,
-            fixture()["upstream"]["claudeTemporaryFailureResponse"].clone(),
-        )
-        .await;
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying { attempt: 2, .. }
-    ));
-    tokio::time::advance(Duration::from_millis(500)).await;
-    let retry = harness.agent.expect("session/prompt").await;
-    harness
-        .agent
-        .reply(&retry, json!({"stopReason": "end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn claude_generic_air_service_errors_cannot_retry_permanent_http_statuses() {
-    for status in [400, 401, 402, 403, 404, 413, 422] {
-        let mut harness = Harness::ready_claude().await;
-        harness.open_session("session-1").await;
-        harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-        let first = harness.agent.expect("session/prompt").await;
-        let mut response = fixture()["upstream"]["claudeTemporaryFailureResponse"].clone();
-        response["_meta"]["jetbrains"]["air"]["sessionFailure"]["title"] =
-            json!(format!("API Error: {status} Request rejected"));
-        harness.agent.reply(&first, response).await;
-        match harness.event().await {
-            AgentEvent::RequestFailed { message, .. } => {
-                assert!(message.contains(&status.to_string()));
-                assert!(
-                    !message.contains("sessionFailure"),
-                    "incident JSON stays internal"
-                );
-            }
-            other => panic!("expected terminal failure, got {other:?}"),
-        }
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(start_paused = true)]
-async fn claude_auth_failure_preserves_air_details_without_starting_account_login() {
-    let mut harness = Harness::ready_claude().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let first = harness.agent.expect("session/prompt").await;
-    let update = fixture()["events"]["claudeSessionFailure"]["update"].clone();
-    harness.agent.write(json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": update}})).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    reject_prompt(&mut harness, &first, "authentication_failed").await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("401 Invalid API key"))
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn responses_agent_errors_keep_their_upstream_retry_policy() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let first = harness.agent.expect("session/prompt").await;
-    reject_prompt(&mut harness, &first, "server_error").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::RequestFailed { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-fn codex_failure_update(sequence: u64, info: Value, active: bool) -> Value {
-    let mut update = fixture()["events"]["codexNativeRetry"]["update"].clone();
-    let title = &mut update["_meta"]["jetbrains"]["air"]["sessionFailure"]["title"];
-    let mut envelope: Value = serde_json::from_str(title.as_str().unwrap()).unwrap();
-    envelope["litheCodexFailure"]["sequence"] = json!(sequence);
-    envelope["litheCodexFailure"]["codexErrorInfo"] = info;
-    envelope["litheCodexFailure"]["activeTurn"] = json!(active);
-    *title = json!(envelope.to_string());
-    update
-}
-
-async fn send_codex_failure(harness: &mut Harness, update: Value) {
-    harness.agent.write(json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": update}})).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_native_retries_report_five_attempts_without_resending_prompt() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    for sequence in 1..=4 {
-        send_codex_failure(
-            &mut harness,
-            codex_failure_update(
-                sequence,
-                json!({"responseStreamDisconnected": {"httpStatusCode": 503}}),
-                true,
-            ),
-        )
-        .await;
-        assert!(
-            matches!(harness.event().await, AgentEvent::TurnRetrying { attempt, max_attempts: Some(5), .. } if attempt == sequence as u32 + 1)
-        );
-    }
-    harness
-        .agent
-        .reply(
-            &prompt,
-            fixture()["upstream"]["codexFailureResponse"].clone(),
-        )
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message == "Local Codex fixture failure")
-    );
-    // stop() expects only shutdown/cancel protocol: another session/prompt
-    // would fail the test, including after the terminal native failure.
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_permanent_native_failures_cancel_immediately_and_preserve_reason() {
-    for info in [
-        json!("unauthorized"),
-        json!("usageLimitExceeded"),
-        json!("badRequest"),
-        json!({"responseStreamDisconnected": {"httpStatusCode": 404}}),
-    ] {
-        let mut harness = Harness::ready_codex().await;
-        harness.open_session("session-1").await;
-        harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-        let prompt = harness.agent.expect("session/prompt").await;
-        send_codex_failure(&mut harness, codex_failure_update(1, info, true)).await;
-        harness.agent.expect("session/cancel").await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnCancelling { .. }
-        ));
-        harness
-            .agent
-            .reply(&prompt, json!({"stopReason": "cancelled"}))
-            .await;
-        assert!(
-            matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message == "Local Codex fixture failure")
-        );
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_reconnect_deadline_does_not_restart_and_cancellation_is_acknowledged() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(1, json!("rateLimitExceeded"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying { attempt: 2, .. }
-    ));
-    tokio::time::advance(Duration::from_secs(19)).await;
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(2, json!("rateLimitExceeded"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying { attempt: 3, .. }
-    ));
-    tokio::time::advance(Duration::from_secs(1)).await;
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "overlap"}));
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("still responding"))
-    );
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason": "cancelled"}))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("20 seconds") && message.contains("Local Codex fixture failure"))
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_recovered_progress_ends_host_deadline_and_later_recovery_is_engine_owned() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    let failure = codex_failure_update(
-        1,
-        json!({"responseStreamDisconnected": {"httpStatusCode": null}}),
-        true,
-    );
-    send_codex_failure(&mut harness, failure.clone()).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying {
-            attempt: 2,
-            max_attempts: Some(5),
-            ..
-        }
-    ));
-    send_codex_failure(&mut harness, failure).await; // duplicate is not another attempt
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(2, json!("unauthorized"), false),
-    )
-    .await; // retired native turn
-    harness.agent.write(json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": {"sessionUpdate": "agent_thought_chunk", "content": {"type": "text", "text": "reasoning"}}}})).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    tokio::time::advance(Duration::from_secs(25)).await;
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(3, json!("internalServerError"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying {
-            attempt: 2,
-            max_attempts: None,
-            ..
-        }
-    ));
-    tokio::time::advance(Duration::from_secs(25)).await;
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason": "end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_post_work_recovery_exceeds_host_time_and_count_limits_without_replay() {
-    for update in [
-        json!({"sessionUpdate": "agent_message_chunk", "content": {"type": "text", "text": "Service started"}}),
-        json!({"sessionUpdate": "tool_call", "toolCallId": "start", "title": "Start service", "kind": "execute", "status": "completed"}),
-    ] {
-        let mut harness = Harness::ready_codex().await;
-        harness.open_session("session-1").await;
-        harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "finish"}));
-        let prompt = harness.agent.expect("session/prompt").await;
-        harness.agent.write(json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": update}})).await;
-        assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-        // Public willRetry warnings stay engine-owned even if more than four
-        // arrive. No Host cancellation or second prompt may reach the peer.
-        for sequence in 1..=6 {
-            send_codex_failure(
-                &mut harness,
-                codex_failure_update(sequence, json!("internalServerError"), true),
-            )
-            .await;
-            assert!(
-                matches!(harness.event().await, AgentEvent::TurnRetrying { attempt, max_attempts: None, .. } if attempt == sequence as u32 + 1)
-            );
-            tokio::time::advance(Duration::from_secs(21)).await;
-            harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "overlap"}));
-            assert!(
-                matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("still responding"))
-            );
-        }
-        harness
-            .agent
-            .reply(&prompt, json!({"stopReason": "end_turn"}))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_post_work_recovery_notice_is_not_delayed_by_warnings_and_progress_clears_it() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "finish"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    let progress = json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": {"sessionUpdate": "agent_thought_chunk", "content": {"type": "text", "text": "Working"}}}});
-    harness.agent.write(progress.clone()).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    // Recovery has its own advisory clock, rather than inheriting old silence.
-    tokio::time::advance(prompt_retry::quiet_notice_delay() / 2).await;
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(1, json!("internalServerError"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying {
-            max_attempts: None,
-            ..
-        }
-    ));
-    tokio::time::advance(prompt_retry::quiet_notice_delay() / 2).await;
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(2, json!("internalServerError"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying { .. }
-    ));
-    assert!(
-        harness.events.try_recv().is_err(),
-        "recovery notice starts at its first warning"
-    );
-    tokio::time::advance(prompt_retry::quiet_notice_delay() / 2).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnActivity { quiet: true, .. }
-    ));
-    harness.agent.write(progress).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnActivity { quiet: false, .. }
-    ));
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason": "end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_post_work_recovery_user_stop_keeps_busy_until_acknowledged() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "finish"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    harness.agent.write(json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": {"sessionUpdate": "tool_call", "toolCallId": "start", "title": "Start service", "kind": "execute"}}})).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(1, json!("internalServerError"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying {
-            max_attempts: None,
-            ..
-        }
-    ));
-    tokio::time::advance(Duration::from_secs(25)).await;
-    harness.send(json!({"kind": "cancel", "sessionId": "session-1"}));
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "overlap"}));
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("still responding"))
-    );
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason": "cancelled"}))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::TurnFinished { stop_reason, .. } if stop_reason == "cancelled")
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_retry_budget_overrun_is_stopped_without_starting_a_sixth_host_prompt() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    for sequence in 1..=5 {
-        send_codex_failure(
-            &mut harness,
-            codex_failure_update(sequence, json!("internalServerError"), true),
-        )
-        .await;
-        if sequence < 5 {
-            assert!(matches!(
-                harness.event().await,
-                AgentEvent::TurnRetrying { .. }
-            ));
-        }
-    }
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason": "cancelled"}))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("five attempts"))
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_post_work_terminal_failure_allows_only_explicit_next_prompt() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "finish"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    harness.agent.write(json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": {"sessionUpdate": "tool_call", "toolCallId": "start", "title": "Start service", "kind": "execute", "status": "completed"}}})).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(1, json!("internalServerError"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying {
-            max_attempts: None,
-            ..
-        }
-    ));
-    tokio::time::advance(Duration::from_secs(25)).await;
-    harness
-        .agent
-        .reply(
-            &prompt,
-            fixture()["upstream"]["codexFailureResponse"].clone(),
-        )
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message == "Local Codex fixture failure")
-    );
-    // The peer must receive only the user-authorized continuation, never an
-    // automatic retry of the original task after tools have already run.
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "Check completed work and continue"}));
-    let next = harness.agent.expect("session/prompt").await;
-    assert_eq!(
-        next["params"]["prompt"][0]["text"],
-        "Check completed work and continue"
-    );
-    harness
-        .agent
-        .reply(&next, json!({"stopReason": "end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_post_work_permanent_failure_still_cancels_and_cleans_unacknowledged_connection() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "finish"}));
-    harness.agent.expect("session/prompt").await;
-    harness.agent.write(json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": {"sessionUpdate": "agent_message_chunk", "content": {"type": "text", "text": "Service started"}}}})).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(1, json!("internalServerError"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying {
-            max_attempts: None,
-            ..
-        }
-    ));
-    tokio::time::advance(Duration::from_secs(25)).await;
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(2, json!("unauthorized"), true),
-    )
-    .await;
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    tokio::time::advance(CANCEL_TIMEOUT).await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message == "Local Codex fixture failure")
-    );
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .expect("connection finishes within local deadline")
-        .expect("connection task completes");
-    assert!(result.unwrap_err().contains("did not acknowledge Stop"));
-}
-
-#[test]
-fn codex_retry_helper_is_owned_by_one_launch_and_removed_on_drop() {
-    let (relay, env) = codex_retry::Relay::create(Path::new("/fixture/codex"), true).unwrap();
-    let script = PathBuf::from(&env.iter().find(|(name, _)| name == "CODEX_PATH").unwrap().1);
-    let directory = script.parent().unwrap().to_owned();
-    assert!(script.is_file());
-    assert_eq!(
-        env.iter()
-            .find(|(name, _)| name == "LITHE_CODEX_STREAM_RETRIES")
-            .unwrap()
-            .1,
-        "4"
-    );
-    drop(relay);
-    assert!(
-        !directory.exists(),
-        "per-launch helper is not a reusable cache"
-    );
-}
-
-fn codex_rate_limit_response() -> Value {
-    let mut response = fixture()["upstream"]["codexFailureResponse"].clone();
-    let title = &mut response["_meta"]["jetbrains"]["air"]["sessionFailure"]["title"];
-    let mut envelope: Value = serde_json::from_str(title.as_str().unwrap()).unwrap();
-    envelope["litheCodexFailure"]["codexErrorInfo"] =
-        json!({"responseTooManyFailedAttempts": {"httpStatusCode": 429}});
-    envelope["litheCodexFailure"]["sequence"] = json!(1);
-    *title = json!(envelope.to_string());
-    response
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_rate_limit_gap_shares_native_budget_and_never_replays_work() {
-    for progress in [false, true] {
-        let mut harness = Harness::ready_codex().await;
-        harness.open_session("session-1").await;
-        harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-        let prompt = harness.agent.expect("session/prompt").await;
-        if progress {
-            harness.agent.write(json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": {"sessionUpdate": "tool_call", "toolCallId": "tool-1", "title": "Execute", "kind": "execute"}}})).await;
-            assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-        }
-        harness
-            .agent
-            .reply(&prompt, codex_rate_limit_response())
-            .await;
-        if progress {
-            assert!(matches!(
-                harness.event().await,
-                AgentEvent::RequestFailed { .. }
-            ));
-        } else {
-            harness.agent.expect("session/cancel").await;
-            assert!(matches!(
-                harness.event().await,
-                AgentEvent::TurnRetrying { attempt: 2, .. }
-            ));
-            tokio::time::advance(Duration::from_millis(500)).await;
-            let retry = harness.agent.expect("session/prompt").await;
-            for sequence in 1..=3 {
-                send_codex_failure(
-                    &mut harness,
-                    codex_failure_update(sequence + 1, json!("internalServerError"), true),
-                )
-                .await;
-                assert!(
-                    matches!(harness.event().await, AgentEvent::TurnRetrying { attempt, .. } if attempt == sequence as u32 + 2)
-                );
-            }
-            harness
-                .agent
-                .reply(&retry, codex_rate_limit_response())
-                .await;
-            assert!(matches!(
-                harness.event().await,
-                AgentEvent::RequestFailed { .. }
-            ));
-        }
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_unacknowledged_reconnect_stop_terminates_the_connection_after_grace() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    harness.agent.expect("session/prompt").await;
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(1, json!("internalServerError"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying { .. }
-    ));
-    tokio::time::advance(prompt_retry::RETRY_WINDOW).await;
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    tokio::time::advance(CANCEL_TIMEOUT).await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("20 seconds"))
-    );
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .expect("connection finishes within local deadline")
-        .expect("connection task completes");
-    assert!(result.unwrap_err().contains("did not acknowledge Stop"));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_delayed_previous_turn_warnings_cannot_change_the_next_prompt() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let first = harness.agent.expect("session/prompt").await;
-    harness
-        .agent
-        .reply(
-            &first,
-            fixture()["upstream"]["codexFailureResponse"].clone(),
-        )
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::RequestFailed { .. }
-    ));
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "next"}));
-    let next = harness.agent.expect("session/prompt").await;
-    // The warning was encoded while the old native turn was active but arrives
-    // after its terminal sequence 5. It must not cancel or count in this prompt.
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(4, json!("unauthorized"), true),
-    )
-    .await;
-    send_codex_failure(
-        &mut harness,
-        codex_failure_update(6, json!("internalServerError"), true),
-    )
-    .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying { attempt: 2, .. }
-    ));
-    harness
-        .agent
-        .reply(&next, json!({"stopReason": "end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn codex_permanent_failure_cannot_be_erased_by_a_ready_success_response() {
-    let mut harness = Harness::ready_codex().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let prompt = harness.agent.expect("session/prompt").await;
-    // Publish both messages before yielding to the host, controlling the race
-    // between its permanent stop deadline and prompt completion.
-    let notification = json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": codex_failure_update(1, json!("unauthorized"), true)}});
-    let response =
-        json!({"jsonrpc": "2.0", "id": prompt["id"], "result": {"stopReason": "end_turn"}});
-    harness
-        .agent
-        .writer
-        .write_all(format!("{notification}\n{response}\n").as_bytes())
-        .await
-        .unwrap();
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    let next = harness.event().await;
-    if matches!(next, AgentEvent::TurnCancelling { .. }) {
-        harness.agent.expect("session/cancel").await;
-        assert!(
-            matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message == "Local Codex fixture failure")
-        );
-    } else {
-        assert!(
-            matches!(next, AgentEvent::RequestFailed { message, .. } if message == "Local Codex fixture failure")
-        );
-    }
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn claude_cancel_during_backoff_finishes_without_resending() {
-    let mut harness = Harness::ready_claude().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let first = harness.agent.expect("session/prompt").await;
-    reject_prompt(&mut harness, &first, "server_error").await;
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying { .. }
-    ));
-    harness.send(json!({"kind": "cancel", "sessionId": "session-1"}));
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    assert!(
-        matches!(harness.event().await, AgentEvent::TurnFinished { stop_reason, .. } if stop_reason == "cancelled")
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn claude_stalled_reconnection_cancels_within_twenty_seconds_before_unlocking() {
-    let mut harness = Harness::ready_claude().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let first = harness.agent.expect("session/prompt").await;
-    reject_prompt(&mut harness, &first, "server_error").await;
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying { .. }
-    ));
-    tokio::time::advance(Duration::from_millis(500)).await;
-    let retry = harness.agent.expect("session/prompt").await;
-    tokio::time::advance(prompt_retry::RETRY_WINDOW).await;
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "overlap"}));
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("still responding"))
-    );
-    harness
-        .agent
-        .reply(&retry, json!({"stopReason": "cancelled"}))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("20 seconds") && message.contains("503"))
-    );
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "next"}));
-    let next = harness.agent.expect("session/prompt").await;
-    harness
-        .agent
-        .reply(&next, json!({"stopReason": "end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(start_paused = true)]
-async fn claude_unacknowledged_retry_timeout_closes_the_connection_after_cancel_grace() {
-    let mut harness = Harness::ready_claude().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-    let first = harness.agent.expect("session/prompt").await;
-    reject_prompt(&mut harness, &first, "server_error").await;
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnRetrying { .. }
-    ));
-    tokio::time::advance(Duration::from_millis(500)).await;
-    harness.agent.expect("session/prompt").await;
-    tokio::time::advance(prompt_retry::RETRY_WINDOW).await;
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    assert!(
-        harness.events.try_recv().is_err(),
-        "no terminal event before cancellation grace"
-    );
-    tokio::time::advance(CANCEL_TIMEOUT).await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { message, .. } if message.contains("20 seconds"))
-    );
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .expect("connection closes within its local deadline")
-        .expect("connection task completes");
-    assert!(result.unwrap_err().contains("did not acknowledge Stop"));
-}
-
-#[tokio::test(start_paused = true)]
-async fn claude_progress_ends_the_retry_window_and_prevents_whole_turn_replay() {
-    for update in [
-        json!({"sessionUpdate": "agent_message_chunk", "content": {"type": "text", "text": "partial"}}),
-        json!({"sessionUpdate": "agent_thought_chunk", "content": {"type": "text", "text": "reasoning"}}),
-        json!({"sessionUpdate": "tool_call", "toolCallId": "tool-1", "title": "Execute", "kind": "execute"}),
-    ] {
-        let mut harness = Harness::ready_claude().await;
-        harness.open_session("session-1").await;
-        harness.send(json!({"kind": "prompt", "sessionId": "session-1", "text": "first"}));
-        let first = harness.agent.expect("session/prompt").await;
-        reject_prompt(&mut harness, &first, "server_error").await;
-        harness.agent.expect("session/cancel").await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnRetrying { .. }
-        ));
-        tokio::time::advance(Duration::from_millis(500)).await;
-        let retry = harness.agent.expect("session/prompt").await;
-        harness.agent.write(json!({"jsonrpc": "2.0", "method": "session/update", "params": {"sessionId": "session-1", "update": update}})).await;
-        assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-        tokio::time::advance(prompt_retry::RETRY_WINDOW + Duration::from_secs(1)).await;
-        reject_prompt(&mut harness, &retry, "server_error").await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::RequestFailed { .. }
-        ));
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[test]
-fn claude_session_routing_rejects_missing_credentials_without_native_account_fallback() {
-    let mut route = claude_route();
-    route.headers.clear();
-    assert!(session_routing::metadata(Some(&route)).is_err());
-    route.headers.push(("x-api-key".into(), " ".into()));
-    assert!(session_routing::metadata(Some(&route)).is_err());
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn claude_new_and_restored_sessions_receive_credentials_over_stdio_without_gateway_login() {
-    let mut harness = Harness::start_with_route(false, Some(claude_route()));
-    let initialize = harness.agent.expect("initialize").await;
-    harness
-        .agent
-        .reply(
-            &initialize,
-            json!({
-                "protocolVersion": 1,
-                "agentInfo": {"name": "claude-acp", "version": "fixture"},
-                "agentCapabilities": {"loadSession": true},
-                "authMethods": []
-            }),
-        )
-        .await;
-    assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-    let expected = fixture()["upstream"]["claudeSessionRouting"]["meta"].clone();
-    harness.send(json!({"kind": "newSession", "token": "new-claude"}));
-    // The very next request must be session/new, never gateway authenticate.
-    let created = harness.agent.expect("session/new").await;
-    assert_eq!(created["params"]["_meta"], expected);
-    harness
-        .agent
-        .reply(&created, json!({"sessionId": "claude-1"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::SessionCreated { .. }
-    ));
-    harness.send(json!({"kind": "loadSession", "token": "load-claude", "sessionId": "claude-1"}));
-    let loaded = harness.agent.expect("session/load").await;
-    let restored = fixture()["upstream"]["claudeSessionRouting"]["restoredMeta"].clone();
-    assert_eq!(loaded["params"]["_meta"], restored);
-    assert_eq!(loaded["params"]["sessionId"], "claude-1");
-    harness.agent.reply(&loaded, json!({})).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::SessionLoaded { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-// A restored selector can describe the transcript while the SDK still runs the
-// launch default. Publishing it before an explicit model acknowledgement would
-// allow the next prompt to use a different model from the visible selection.
-#[tokio::test(flavor = "current_thread")]
-async fn claude_restored_session_confirms_model_before_publishing_loaded() {
-    for scenario in [
-        "different-default",
-        "same-default",
-        "grouped",
-        "outside-picker",
-    ] {
-        let mut harness = Harness::ready_claude().await;
-        let mut options = fixture()["upstream"]["claudeRestoredSession"]["configOptions"].clone();
-        if scenario == "same-default" {
-            options[0]["currentValue"] =
-                fixture()["upstream"]["claudeSessionRouting"]["provider"]["model"].clone();
-        }
-        if scenario == "grouped" {
-            let choices = options[0]["options"].clone();
-            options[0]["options"] =
-                json!([{"group": "models", "name": "Models", "options": choices}]);
-        } else if scenario == "outside-picker" {
-            options[0]["options"] = json!([]);
-        }
-        let model = options[0]["currentValue"].as_str().unwrap().to_owned();
-        harness.send(json!({"kind": "loadSession", "token": "restore", "sessionId": "history"}));
-        let load = harness.agent.expect("session/load").await;
-        assert!(load["params"]["_meta"]["claudeCode"]["options"]
-            .get("model")
-            .is_none());
-        harness
-            .agent
-            .reply(&load, json!({"configOptions": options}))
-            .await;
-        let configure = harness.agent.expect("session/set_config_option").await;
-        assert_eq!(configure["params"]["sessionId"], "history");
-        assert_eq!(configure["params"]["configId"], "restored-model-selector");
-        assert_eq!(configure["params"]["value"], model);
-        assert!(
-            harness.events.try_recv().is_err(),
-            "loading stays pending until model confirmation"
-        );
-        // Return the full upstream configuration, including a changed effort
-        // catalog; consumers must receive that response rather than stale load data.
-        options[2]["currentValue"] = json!("high");
-        harness
-            .agent
-            .reply(&configure, json!({"configOptions": options}))
-            .await;
-        match harness.event().await {
-            AgentEvent::SessionLoaded {
-                token,
-                session_id,
-                config_options,
-            } => {
-                assert_eq!(token, "restore");
-                assert_eq!(session_id, "history");
-                assert_eq!(serde_json::to_value(config_options).unwrap(), options);
-            }
-            other => panic!("expected confirmed restore, got {other:?}"),
-        }
-        harness.send(json!({"kind": "prompt", "sessionId": "history", "text": "continue"}));
-        let prompt = harness.agent.expect("session/prompt").await;
-        harness
-            .agent
-            .reply(&prompt, json!({"stopReason": "end_turn"}))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn claude_restored_model_rejection_or_mismatch_does_not_report_loaded() {
-    for rejection in [true, false] {
-        let mut harness = Harness::ready_claude().await;
-        let mut options = fixture()["upstream"]["claudeRestoredSession"]["configOptions"].clone();
-        harness.send(json!({"kind": "loadSession", "token": "restore", "sessionId": "history"}));
-        let load = harness.agent.expect("session/load").await;
-        harness
-            .agent
-            .reply(&load, json!({"configOptions": options}))
-            .await;
-        let configure = harness.agent.expect("session/set_config_option").await;
-        if rejection {
-            harness.agent.write(json!({"jsonrpc": "2.0", "id": configure["id"], "error": {"code": -32603, "message": "model switch rejected"}})).await;
-        } else {
-            options[0]["currentValue"] = json!("wrong-model");
-            harness
-                .agent
-                .reply(&configure, json!({"configOptions": options}))
-                .await;
-        }
-        assert!(
-            matches!(harness.event().await, AgentEvent::RequestFailed { token: Some(token), session_id: Some(id), .. } if token == "restore" && id == "history")
-        );
-        assert!(
-            harness.events.try_recv().is_err(),
-            "failed model sync must not unlock a queued prompt"
-        );
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn claude_restored_model_confirmation_shares_the_load_deadline() {
-    let mut harness = Harness::ready_claude().await;
-    harness.send(json!({"kind": "loadSession", "token": "restore", "sessionId": "history"}));
-    let load = harness.agent.expect("session/load").await;
-    tokio::time::advance(Duration::from_secs(30)).await;
-    let options = fixture()["upstream"]["claudeRestoredSession"]["configOptions"].clone();
-    harness
-        .agent
-        .reply(&load, json!({"configOptions": options}))
-        .await;
-    harness.agent.expect("session/set_config_option").await;
-    tokio::time::advance(LOAD_SESSION_TIMEOUT - Duration::from_secs(30)).await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { token: Some(token), session_id: Some(id), message } if token == "restore" && id == "history" && message == "The Agent did not respond in time")
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn agent_without_gateway_sign_in_is_rejected_without_account_login() {
-    let mut harness = Harness::start();
-    let initialize = harness.agent.expect("initialize").await;
-    harness
-        .agent
-        .reply(
-            &initialize,
-            json!({ "protocolVersion": 1, "authMethods": [{ "id": "chat-gpt", "name": "ChatGPT" }] }),
-        )
-        .await;
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .expect("connection ends before deadline")
-        .expect("connection task completes");
-    assert!(result.unwrap_err().contains("custom API key"));
-    assert!(
-        harness.events.try_recv().is_err(),
-        "no ready event without sign-in"
-    );
-}
-
-// A lost startup cancel must never allow another prompt into the old turn.
-#[tokio::test(flavor = "current_thread")]
-async fn cancel_blocks_the_next_prompt_until_acknowledged() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "first" }));
-    let first = harness.agent.expect("session/prompt").await;
-
-    harness.send(json!({ "kind": "cancel", "sessionId": "session-1" }));
-    let cancel = harness.agent.expect("session/cancel").await;
-    assert_eq!(cancel["params"]["sessionId"], "session-1");
-    match harness.event().await {
-        AgentEvent::TurnCancelling { session_id } => assert_eq!(session_id, "session-1"),
-        other => panic!("expected stopping turn, got {other:?}"),
-    }
-
-    // A second prompt is rejected before the agent answers the first one.
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "second" }));
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::RequestFailed { .. }
-    ));
-    harness
-        .agent
-        .reply(&first, json!({ "stopReason": "cancelled" }))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::TurnFinished { stop_reason, .. } if stop_reason == "cancelled")
-    );
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "second" }));
-    let second = harness.agent.expect("session/prompt").await;
-    harness
-        .agent
-        .reply(&second, json!({ "stopReason": "end_turn" }))
-        .await;
-    // Events are ordered, so a stale report for the first turn would come first.
-    match harness.event().await {
-        AgentEvent::TurnFinished { stop_reason, .. } => assert_eq!(stop_reason, "end_turn"),
-        other => panic!("expected the second turn to finish, got {other:?}"),
-    }
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn unacknowledged_cancel_ends_the_connection_with_recovery_error() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "first" }));
-    harness.agent.expect("session/prompt").await;
-    harness.send(json!({ "kind": "cancel", "sessionId": "session-1" }));
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    tokio::time::advance(CANCEL_TIMEOUT).await;
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .unwrap()
-        .unwrap();
-    assert!(result.unwrap_err().contains("Reconnect"));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn session_configuration_round_trips_upstream_options() {
-    let mut harness = Harness::ready().await;
-    let options = fixture()["events"]["sessionConfigured"]["configOptions"].clone();
-    harness.send(json!({ "kind": "newSession", "token": "new" }));
-    let request = harness.agent.expect("session/new").await;
-    harness
-        .agent
-        .reply(
-            &request,
-            json!({ "sessionId": "session-1", "configOptions": options }),
-        )
-        .await;
-    match harness.event().await {
-        AgentEvent::SessionCreated { config_options, .. } => {
-            assert_eq!(serde_json::to_value(config_options).unwrap(), options)
-        }
-        other => panic!("expected session, got {other:?}"),
-    }
-    harness.send(fixture()["commands"]["setConfigOption"].clone());
-    let request = harness.agent.expect("session/set_config_option").await;
-    assert_eq!(request["params"]["configId"], "model");
-    assert_eq!(request["params"]["value"], "example-model");
-    harness
-        .agent
-        .reply(&request, json!({ "configOptions": options }))
-        .await;
-    assert_eq!(
-        serde_json::to_value(harness.event().await).unwrap(),
-        fixture()["events"]["sessionConfigured"]
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-/// The Host applies next-turn choices as one confirmed sequence and answers
-/// with the shared event shape, both on success and when a request fails.
-#[tokio::test(flavor = "current_thread")]
-async fn next_turn_configuration_applies_choices_and_reports_one_result() {
-    let next: Value = serde_json::from_str(include_str!(
-        "../../fixtures/agent/next-turn-configuration-v1.json"
-    ))
-    .unwrap();
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    let configured = next["events"]["configured"].clone();
-    harness.send(next["command"].clone());
-    let request = harness.agent.expect("session/set_config_option").await;
-    assert_eq!(request["params"]["configId"], "model");
-    assert_eq!(request["params"]["value"], "model-b");
-    harness
-        .agent
-        .reply(
-            &request,
-            json!({ "configOptions": configured["configOptions"] }),
-        )
-        .await;
-    assert_eq!(
-        serde_json::to_value(harness.event().await).unwrap(),
-        configured
-    );
-
-    harness.send(next["command"].clone());
-    let request = harness.agent.expect("session/set_config_option").await;
-    harness
-        .agent
-        .write(json!({ "jsonrpc": "2.0", "id": request["id"], "error": { "code": -32602, "message": "Rejected" } }))
-        .await;
-    let failed = serde_json::to_value(harness.event().await).unwrap();
-    assert_eq!(failed["kind"], "nextTurnConfigured");
-    assert_eq!(failed["failure"], "requestFailed");
-    assert!(
-        failed.get("configOptions").is_none(),
-        "no request succeeded"
-    );
-    assert!(failed["message"].as_str().unwrap().contains("Rejected"));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn every_new_session_repairs_a_stale_model_before_publishing_options() {
-    let mut harness = Harness::ready().await;
-    let upstream = fixture()["upstream"].clone();
-    for token in ["first", "second"] {
-        let mut initial = upstream["staleModelSession"].clone();
-        if token == "second" {
-            // Adapters without AIR recommendations still expose a usable catalog.
-            initial["configOptions"][0]
-                .as_object_mut()
-                .unwrap()
-                .remove("_meta");
-        }
-        harness.send(json!({ "kind": "newSession", "token": token }));
-        let request = harness.agent.expect("session/new").await;
-        harness.agent.reply(&request, initial).await;
-        let repair = harness.agent.expect("session/set_config_option").await;
-        assert_eq!(repair["params"]["sessionId"], "session-repaired");
-        assert_eq!(repair["params"]["configId"], "model");
-        assert_eq!(repair["params"]["value"], "model-current");
-        assert!(
-            harness.events.try_recv().is_err(),
-            "a session must not be exposed before confirmation"
-        );
-        harness
-            .agent
-            .reply(&repair, upstream["repairedModelConfiguration"].clone())
-            .await;
-        let event = serde_json::to_value(harness.event().await).unwrap();
-        assert_eq!(event["kind"], "sessionCreated");
-        assert_eq!(event["token"], token);
-        assert_eq!(
-            event["configOptions"],
-            upstream["repairedModelConfiguration"]["configOptions"]
-        );
-    }
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn model_repair_rejection_does_not_publish_a_fake_success() {
-    let mut harness = Harness::ready().await;
-    harness.send(json!({ "kind": "newSession", "token": "new" }));
-    let request = harness.agent.expect("session/new").await;
-    harness
-        .agent
-        .reply(&request, fixture()["upstream"]["staleModelSession"].clone())
-        .await;
-    let repair = harness.agent.expect("session/set_config_option").await;
-    harness.agent.write(json!({ "jsonrpc": "2.0", "id": repair["id"], "error": {"code": -32602, "message": "Model rejected"} })).await;
-    let event = serde_json::to_value(harness.event().await).unwrap();
-    assert_eq!(event["kind"], "requestFailed");
-    assert_eq!(event["token"], "new");
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn model_repair_requires_the_upstream_to_confirm_the_new_value() {
-    let mut harness = Harness::ready().await;
-    harness.send(json!({ "kind": "newSession", "token": "new" }));
-    let request = harness.agent.expect("session/new").await;
-    let stale = fixture()["upstream"]["staleModelSession"].clone();
-    harness.agent.reply(&request, stale.clone()).await;
-    let repair = harness.agent.expect("session/set_config_option").await;
-    harness
-        .agent
-        .reply(&repair, json!({"configOptions": stale["configOptions"]}))
-        .await;
-    let event = serde_json::to_value(harness.event().await).unwrap();
-    assert_eq!(event["kind"], "requestFailed");
-    assert!(event["message"]
-        .as_str()
-        .unwrap()
-        .contains("did not confirm"));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn model_repair_shares_the_bounded_session_creation_deadline() {
-    let mut harness = Harness::ready().await;
-    harness.send(json!({ "kind": "newSession", "token": "new" }));
-    let request = harness.agent.expect("session/new").await;
-    harness
-        .agent
-        .reply(&request, fixture()["upstream"]["staleModelSession"].clone())
-        .await;
-    harness.agent.expect("session/set_config_option").await;
-    tokio::time::advance(SESSION_REQUEST_TIMEOUT).await;
-    let event = serde_json::to_value(harness.event().await).unwrap();
-    assert_eq!(event["kind"], "requestFailed");
-    assert_eq!(event["token"], "new");
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn updates_and_turns_are_routed_to_their_own_sessions() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-a").await;
-    harness.open_session("session-b").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-a", "text": "a" }));
-    let prompt_a = harness.agent.expect("session/prompt").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-b", "text": "b" }));
-    let prompt_b = harness.agent.expect("session/prompt").await;
-    for session in ["session-b", "session-a"] {
-        harness
-            .agent
-            .write(json!({
-                "jsonrpc": "2.0",
-                "method": "session/update",
-                "params": {
-                    "sessionId": session,
-                    "update": { "sessionUpdate": "agent_message_chunk", "content": { "type": "text", "text": session } }
-                }
-            }))
-            .await;
-    }
-    for expected in ["session-b", "session-a"] {
-        match harness.event().await {
-            AgentEvent::Update { session_id, update } => {
-                assert_eq!(session_id, expected);
-                assert_eq!(update["content"]["text"], expected);
-            }
-            other => panic!("expected update, got {other:?}"),
-        }
-    }
-    harness
-        .agent
-        .reply(
-            &prompt_b,
-            fixture()["upstream"]["promptResponseWithUsage"].clone(),
-        )
-        .await;
-    harness
-        .agent
-        .reply(&prompt_a, json!({ "stopReason": "max_tokens" }))
-        .await;
-    let finished: Vec<(String, String)> = [harness.event().await, harness.event().await]
-        .into_iter()
-        .map(|event| match event {
-            AgentEvent::TurnFinished {
-                session_id,
-                stop_reason,
-                usage,
-            } => {
-                if session_id == "session-b" {
-                    let usage = usage.expect("reported counters survive the prompt response");
-                    assert_eq!(usage.input_tokens, 18000);
-                    assert_eq!(usage.output_tokens, 2000);
-                    assert_eq!(usage.cached_read_tokens, Some(3000));
-                } else {
-                    assert!(usage.is_none(), "usage is not carried between sessions");
-                }
-                (session_id, stop_reason)
-            }
-            other => panic!("expected turn end, got {other:?}"),
-        })
-        .collect();
-    assert_eq!(
-        finished,
-        [
-            ("session-b".into(), "end_turn".into()),
-            ("session-a".into(), "max_tokens".into())
-        ]
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn permission_is_answered_by_the_user_and_rejected_by_cancel() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "run" }));
-    let _prompt = harness.agent.expect("session/prompt").await;
-    let permission_request = |id: u64| {
-        json!({
-            "jsonrpc": "2.0", "id": id, "method": "session/request_permission",
-            "params": {
-                "sessionId": "session-1",
-                "toolCall": { "toolCallId": "call-1", "title": "Run tests" },
-                "options": [{ "optionId": "allow_once", "name": "Allow Once", "kind": "allow_once" }]
-            }
-        })
-    };
-
-    harness.agent.write(permission_request(900)).await;
-    let request_id = match harness.event().await {
-        AgentEvent::Permission {
-            session_id,
-            request_id,
-            ..
-        } => {
-            assert_eq!(session_id, "session-1");
-            request_id
-        }
-        other => panic!("expected permission, got {other:?}"),
-    };
-    answer_permission(&harness.permissions, &request_id, Some("allow_once".into())).unwrap();
-    let answer = harness.agent.next().await;
-    assert_eq!(answer["id"], 900);
-    assert_eq!(answer["result"]["outcome"]["outcome"], "selected");
-    assert_eq!(answer["result"]["outcome"]["optionId"], "allow_once");
-
-    harness.agent.write(permission_request(901)).await;
-    let request_id = match harness.event().await {
-        AgentEvent::Permission { request_id, .. } => request_id,
-        other => panic!("expected permission, got {other:?}"),
-    };
-    harness.send(json!({ "kind": "cancel", "sessionId": "session-1" }));
-    let answer = harness.agent.next().await;
-    assert_eq!(answer["id"], 901);
-    assert_eq!(answer["result"]["outcome"]["outcome"], "cancelled");
-    assert!(answer_permission(&harness.permissions, &request_id, None).is_err());
-    let _cancel = harness.agent.expect("session/cancel").await;
-
-    // With no running turn, a late request is refused without asking the user.
-    harness.agent.write(permission_request(902)).await;
-    let answer = harness.agent.next().await;
-    assert_eq!(answer["id"], 902);
-    assert_eq!(answer["result"]["outcome"]["outcome"], "cancelled");
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    assert!(
-        harness.events.try_recv().is_err(),
-        "late request must not reach the UI"
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-// Regression: a permission request registered after the handle rejected the
-// session's pending requests, but before the loop processed the cancel, must
-// still be answered instead of remaining pending after cancellation.
-#[tokio::test(flavor = "current_thread")]
-async fn cancel_also_rejects_a_permission_registered_after_the_handle_check() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "run" }));
-    let _prompt = harness.agent.expect("session/prompt").await;
-    harness
-        .agent
-        .write(json!({
-            "jsonrpc": "2.0", "id": 950, "method": "session/request_permission",
-            "params": {
-                "sessionId": "session-1",
-                "toolCall": { "toolCallId": "call-1", "title": "Run tests" },
-                "options": [{ "optionId": "allow_once", "name": "Allow Once", "kind": "allow_once" }]
-            }
-        }))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::Permission { .. }
-    ));
-    // Queue the cancel directly, skipping the handle's own rejection.
-    let cancel =
-        serde_json::from_value(json!({ "kind": "cancel", "sessionId": "session-1" })).unwrap();
-    harness
-        .controls
-        .send(Control::Command(cancel))
-        .expect("connection running");
-    // The protocol does not order the cancel notification and the permission
-    // reply, which are written by different tasks.
-    let messages = [harness.agent.next().await, harness.agent.next().await];
-    let answer = messages
-        .iter()
-        .find(|m| m["id"] == 950)
-        .expect("permission answered");
-    assert_eq!(answer["result"]["outcome"]["outcome"], "cancelled");
-    assert!(messages.iter().any(|m| m["method"] == "session/cancel"));
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn session_history_is_listed_across_pages_and_loaded() {
-    let mut harness = Harness::ready().await;
-    harness.send(json!({ "kind": "listSessions", "token": "list" }));
-    let first = harness.agent.expect("session/list").await;
-    assert!(first["params"]["cwd"].is_string());
-    harness
-        .agent
-        .reply(&first, json!({ "sessions": [{ "sessionId": "s1", "cwd": "/w", "title": "One" }], "nextCursor": "page-2" }))
-        .await;
-    let second = harness.agent.expect("session/list").await;
-    assert_eq!(second["params"]["cursor"], "page-2");
-    // The second response is deliberately withheld: the first page must already
-    // be visible, without completing or cancelling the remaining scan.
-    match harness.event().await {
-        AgentEvent::SessionsPage { token, sessions } => {
-            assert_eq!(token, "list");
-            assert_eq!(sessions.len(), 1);
-            assert_eq!(sessions[0].session_id, "s1");
-        }
-        other => panic!("expected early page, got {other:?}"),
-    }
-    harness
-        .agent
-        .reply(
-            &second,
-            json!({ "sessions": [{ "sessionId": "s2", "cwd": "/w" }] }),
-        )
-        .await;
-    match harness.event().await {
-        AgentEvent::Sessions { token, sessions } => {
-            assert_eq!(token, "list");
-            let ids: Vec<&str> = sessions.iter().map(|s| s.session_id.as_str()).collect();
-            assert_eq!(ids, ["s1", "s2"]);
-        }
-        other => panic!("expected sessions, got {other:?}"),
-    }
-
-    harness.send(json!({ "kind": "loadSession", "token": "load", "sessionId": "s1" }));
-    let load = harness.agent.expect("session/load").await;
-    assert_eq!(load["params"]["sessionId"], "s1");
-    harness.agent.reply(&load, json!({})).await;
-    match harness.event().await {
-        AgentEvent::SessionLoaded {
-            token, session_id, ..
-        } => {
-            assert_eq!((token.as_str(), session_id.as_str()), ("load", "s1"))
-        }
-        other => panic!("expected loaded session, got {other:?}"),
-    }
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn session_history_follows_empty_workspace_pages_and_reports_later_failure() {
-    let mut harness = Harness::ready().await;
-    harness.send(json!({"kind":"listSessions", "token":"history"}));
-    let first = harness.agent.expect("session/list").await;
-    // A global Codex page may contain no sessions for this workspace. It does
-    // not establish empty history and must not prevent finding later matches.
-    harness
-        .agent
-        .reply(&first, json!({"sessions":[], "nextCursor":"next"}))
-        .await;
-    let second = harness.agent.expect("session/list").await;
-    assert_eq!(second["params"]["cursor"], "next");
-    harness
-        .agent
-        .reply(
-            &second,
-            json!({"sessions":[{"sessionId":"found", "cwd":"/w"}], "nextCursor":"last"}),
-        )
-        .await;
-    let third = harness.agent.expect("session/list").await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::SessionsPage { token, sessions }
-        if token == "history" && sessions.len() == 1 && sessions[0].session_id == "found")
-    );
-    harness
-        .agent
-        .write(json!({"jsonrpc":"2.0", "id":third["id"],
-        "error":{"code":-32603, "message":"History unavailable"}}))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::RequestFailed { token: Some(token), .. } if token == "history")
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn session_history_stops_with_an_outstanding_page() {
-    let mut harness = Harness::ready().await;
-    harness.send(json!({"kind":"listSessions", "token":"history"}));
-    let first = harness.agent.expect("session/list").await;
-    harness
-        .agent
-        .reply(
-            &first,
-            json!({"sessions":[{"sessionId":"found", "cwd":"/w"}], "nextCursor":"next"}),
-        )
-        .await;
-    let _pending = harness.agent.expect("session/list").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::SessionsPage { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn a_busy_session_rejects_a_second_prompt_without_stopping() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "first" }));
-    let first = harness.agent.expect("session/prompt").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "again" }));
-    match harness.event().await {
-        AgentEvent::RequestFailed { session_id, .. } => {
-            assert_eq!(session_id.as_deref(), Some("session-1"))
-        }
-        other => panic!("expected request failure, got {other:?}"),
-    }
-    harness
-        .agent
-        .reply(&first, json!({ "stopReason": "end_turn" }))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-// Quiet prompts remain busy even far beyond the former ten-minute cap.
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn a_long_silent_prompt_warns_without_cancelling_or_replaying() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "wait" }));
-    let prompt = harness.agent.expect("session/prompt").await;
-    tokio::time::advance(prompt_retry::quiet_notice_delay()).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnActivity { quiet: true, .. }
-    ));
-    tokio::time::advance(Duration::from_secs(60 * 60)).await;
-    assert!(
-        harness.events.try_recv().is_err(),
-        "silence is advisory only"
-    );
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "overlap" }));
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::RequestFailed { .. }
-    ));
-    harness
-        .agent
-        .reply(&prompt, json!({ "stopReason": "end_turn" }))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::TurnFinished { stop_reason, .. } if stop_reason == "end_turn")
-    );
-    // There was no automatic cancel or replay before this new prompt.
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "next" }));
-    let next = harness.agent.expect("session/prompt").await;
-    harness
-        .agent
-        .reply(&next, json!({ "stopReason": "end_turn" }))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn progress_resets_the_advisory_and_long_tools_can_complete() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "build" }));
-    let prompt = harness.agent.expect("session/prompt").await;
-    // Successive tool updates keep one turn alive for more than ten minutes.
-    for _ in 0..5 {
-        tokio::time::advance(prompt_retry::quiet_notice_delay() / 2).await;
-        harness.agent.write(json!({ "jsonrpc": "2.0", "method": "session/update", "params": {
-            "sessionId": "session-1", "update": { "sessionUpdate": "tool_call", "toolCallId": "build", "title": "Build", "status": "in_progress" }
-        }})).await;
-        assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    }
-    tokio::time::advance(prompt_retry::quiet_notice_delay()).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnActivity { quiet: true, .. }
-    ));
-    harness.agent.write(json!({ "jsonrpc": "2.0", "method": "session/update", "params": {
-        "sessionId": "session-1", "update": { "sessionUpdate": "tool_call_update", "toolCallId": "build", "status": "completed" }
-    }})).await;
-    assert!(matches!(harness.event().await, AgentEvent::Update { .. }));
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnActivity { quiet: false, .. }
-    ));
-    tokio::time::advance(prompt_retry::quiet_notice_delay() / 2).await;
-    assert!(harness.events.try_recv().is_err());
-    harness
-        .agent
-        .reply(&prompt, json!({ "stopReason": "end_turn" }))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn permission_wait_has_no_deadline_and_quiet_tracking_resumes_after_all_answers() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "run" }));
-    let prompt = harness.agent.expect("session/prompt").await;
-    let mut requests = Vec::new();
-    for id in [801, 802] {
-        harness.agent.write(json!({ "jsonrpc": "2.0", "id": id, "method": "session/request_permission", "params": {
-            "sessionId": "session-1", "toolCall": { "toolCallId": format!("call-{id}"), "title": "Run tests" },
-            "options": [{ "optionId": "allow_once", "name": "Allow Once", "kind": "allow_once" }]
-        }})).await;
-        match harness.event().await {
-            AgentEvent::Permission { request_id, .. } => requests.push(request_id),
-            other => panic!("expected permission, got {other:?}"),
-        }
-    }
-    tokio::time::advance(Duration::from_secs(60 * 60)).await;
-    assert!(harness.events.try_recv().is_err());
-    answer_permission(
-        &harness.permissions,
-        &requests[0],
-        Some("allow_once".into()),
-    )
-    .unwrap();
-    let answer = harness.agent.next().await;
-    assert_eq!(answer["result"]["outcome"]["optionId"], "allow_once");
-    tokio::time::advance(Duration::from_secs(60 * 60)).await;
-    assert!(
-        harness.events.try_recv().is_err(),
-        "another permission is still pending"
-    );
-    answer_permission(
-        &harness.permissions,
-        &requests[1],
-        Some("allow_once".into()),
-    )
-    .unwrap();
-    let answer = harness.agent.next().await;
-    assert_eq!(answer["result"]["outcome"]["optionId"], "allow_once");
-    tokio::time::advance(prompt_retry::quiet_notice_delay()).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnActivity { quiet: true, .. }
-    ));
-    harness
-        .agent
-        .reply(&prompt, json!({ "stopReason": "end_turn" }))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-// A user approval cannot hold the SDK dispatch loop or hide another session's progress.
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn pending_permission_does_not_block_other_sessions_and_exit_settles_the_connection() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-a").await;
-    harness.open_session("session-b").await;
-    for session in ["session-a", "session-b"] {
-        harness.send(json!({ "kind": "prompt", "sessionId": session, "text": "run" }));
-        harness.agent.expect("session/prompt").await;
-    }
-    harness.agent.write(json!({ "jsonrpc": "2.0", "id": 901, "method": "session/request_permission", "params": {
-        "sessionId": "session-a", "toolCall": { "toolCallId": "approval", "title": "Run tests" },
-        "options": [{ "optionId": "allow_once", "name": "Allow Once", "kind": "allow_once" }]
-    }})).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::Permission { .. }
-    ));
-    harness.agent.write(json!({ "jsonrpc": "2.0", "method": "session/update", "params": {
-        "sessionId": "session-b", "update": { "sessionUpdate": "agent_message_chunk", "content": { "type": "text", "text": "Other work continues" } }
-    }})).await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::Update { session_id, .. } if session_id == "session-b")
-    );
-    tokio::time::advance(prompt_retry::quiet_notice_delay()).await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::TurnActivity { session_id, quiet: true } if session_id == "session-b")
-    );
-    assert!(
-        harness.events.try_recv().is_err(),
-        "approval wait is not quiet work"
-    );
-    harness
-        .agent
-        .writer
-        .shutdown()
-        .await
-        .expect("agent exits with pending approval");
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .expect("EOF is dispatched despite pending approval")
-        .expect("connection joins");
-    assert!(result.is_err());
-    assert!(
-        harness.permissions.lock().unwrap().is_empty(),
-        "connection exit releases approval senders"
-    );
-}
-
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn user_stop_after_quiet_notice_retains_busy_state_until_acknowledged() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "wait" }));
-    let prompt = harness.agent.expect("session/prompt").await;
-    tokio::time::advance(prompt_retry::quiet_notice_delay()).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnActivity { quiet: true, .. }
-    ));
-    harness.send(json!({ "kind": "cancel", "sessionId": "session-1" }));
-    harness.agent.expect("session/cancel").await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnCancelling { .. }
-    ));
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnActivity { quiet: false, .. }
-    ));
-    harness.send(json!({ "kind": "prompt", "sessionId": "session-1", "text": "overlap" }));
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::RequestFailed { .. }
-    ));
-    harness
-        .agent
-        .reply(&prompt, json!({ "stopReason": "cancelled" }))
-        .await;
-    assert!(
-        matches!(harness.event().await, AgentEvent::TurnFinished { stop_reason, .. } if stop_reason == "cancelled")
-    );
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn agent_exit_without_a_stop_request_is_reported_as_failure() {
-    let mut harness = Harness::ready().await;
-    harness
-        .agent
-        .writer
-        .shutdown()
-        .await
-        .expect("close agent output");
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .expect("connection ends before deadline")
-        .expect("connection task completes");
-    assert!(result.is_err());
-}
-
-#[test]
-fn stderr_tail_keeps_recent_lines_and_redacts_the_key() {
-    let mut tail = StderrTail::default();
-    for index in 0..40 {
-        tail.push(format!("line {index}\n").as_bytes());
-    }
-    tail.push(b"auth failed for sk-secret\n");
-    let summary = tail.summary("sk-secret").expect("stderr summary");
-    assert!(!summary.contains("sk-secret"));
-    assert!(summary.ends_with("auth failed for <redacted>"));
-    assert!(!summary.contains("line 0\n"));
-    assert_eq!(summary.lines().count(), STDERR_TAIL_LINES);
-
-    let mut large = StderrTail::default();
-    large.push(&vec![b'x'; STDERR_TAIL_BYTES * 2]);
-    assert_eq!(large.0.len(), STDERR_TAIL_BYTES);
-    assert!(StderrTail::default().summary("key").is_none());
-}
-
-#[test]
-fn provider_endpoints_are_normalized_per_protocol_and_must_be_secure() {
-    let endpoint = |url: &str, insecure: bool| ProviderCredentials {
-        base_url: url.into(),
-        allow_insecure_http: insecure,
-        ..provider()
-    };
-    for url in [
-        "https://host.example/v1",
-        "https://host.example/v1/",
-        " https://host.example/v1/responses ",
-    ] {
-        assert_eq!(
-            endpoint(url, false).responses_base_url().unwrap(),
-            "https://host.example/v1"
-        );
-    }
-    for url in [
-        "https://api.example",
-        "https://api.example/v1",
-        "https://api.example/v1/messages/",
-    ] {
-        assert_eq!(
-            endpoint(url, false).anthropic_base_url().unwrap(),
-            "https://api.example"
-        );
-    }
-    assert!(endpoint("http://localhost:1234/v1", false)
-        .responses_base_url()
-        .is_err());
-    assert_eq!(
-        endpoint("http://localhost:1234/v1", true)
-            .responses_base_url()
-            .unwrap(),
-        "http://localhost:1234/v1"
-    );
-    for url in [
-        "",
-        "host.example/v1",
-        "https://",
-        "https://host.example/v1?key=1",
-        "ftp://host",
-    ] {
-        assert!(endpoint(url, true).responses_base_url().is_err(), "{url}");
-    }
-}
-
-#[test]
-fn provider_debug_output_never_contains_the_key() {
-    let rendered = format!("{:?}", provider());
-    assert!(!rendered.contains("test-key-123"));
-    assert!(rendered.contains("<redacted>"));
-}
-
-#[test]
-fn child_path_puts_the_agent_directory_before_the_search_path() {
-    let directory = std::env::temp_dir().join("lithe-agent-bin");
-    let base = std::env::join_paths(["/shell/node/bin", "/usr/bin"]).unwrap();
-    let path = child_path(&directory.join("codex-acp"), Some(base)).expect("PATH");
-    let entries: Vec<PathBuf> = std::env::split_paths(&path).collect();
-    assert_eq!(
-        entries,
-        [directory, "/shell/node/bin".into(), "/usr/bin".into()]
-    );
-    assert!(child_path(Path::new("codex-acp"), None).is_none());
-}
-
-/// Install a fake adapter the way `install` leaves it, without running npm.
-fn fake_install(data: &Path, agent_id: &str) {
-    let agent = catalog::find(agent_id).unwrap();
-    let command = install::installed_command(data, agent);
-    std::fs::create_dir_all(command.parent().unwrap()).unwrap();
-    std::fs::write(&command, "#!/bin/sh\n").unwrap();
-    std::fs::write(
-        install::agent_directory(data, agent).join("lithe-agent.json"),
-        format!(r#"{{"id":"{agent_id}","version":"{}"}}"#, agent.version),
-    )
-    .unwrap();
-}
-
-#[test]
-fn catalog_agents_resolve_to_their_install_and_key_delivery() {
-    struct Cleanup(PathBuf);
-    impl Drop for Cleanup {
-        fn drop(&mut self) {
-            let _ = std::fs::remove_dir_all(&self.0);
-        }
-    }
-    let data = std::env::temp_dir().join(format!("lithe-resolve-{}", std::process::id()));
-    let _cleanup = Cleanup(data.clone());
-    let _ = std::fs::remove_dir_all(&data);
-    let launch = |agent_id: &str, provider: ProviderCredentials| AgentLaunch {
-        agent_id: Some(agent_id.into()),
-        command: None,
-        args: vec![],
-        cwd: std::env::temp_dir(),
-        data_directory: Some(data.clone()),
-        provider: Some(provider),
-        authentication: AgentAuthentication::ApiKey,
-        observe_model_calls: false,
-        observe_subagents: false,
-        process_scope: None,
-        claude_config_dir: None,
-        context_limits: Default::default(),
-        codex_home: None,
-    };
-    let anthropic = ProviderCredentials {
-        protocol: ProviderProtocol::AnthropicMessages,
-        base_url: "https://api.example/v1/messages".into(),
-        ..provider()
-    };
-    let codex_cli = |command: &str| match command {
-        "codex" => Some(environment::DetectedTool {
-            version: "0.160.1".into(),
-            path: "/opt/example/bin/codex".into(),
-        }),
-        "claude" => Some(environment::DetectedTool {
-            version: "2.1.310".into(),
-            path: "/opt/example/bin/claude".into(),
-        }),
-        _ => None,
-    };
-    let resolve = |launch: AgentLaunch| resolve_with(launch, &codex_cli);
-    let not_installed = resolve(launch("codex-acp", provider())).err().unwrap();
-    assert!(not_installed.contains("not installed"), "{not_installed}");
-    fake_install(&data, "codex-acp");
-    fake_install(&data, "claude-acp");
-
-    let mut subscription = launch("codex-acp", provider());
-    subscription.authentication = AgentAuthentication::CodexSubscription;
-    subscription.provider = None;
-    let mut subscription = resolve(subscription).unwrap();
-    assert!(subscription.gateway.is_none());
-    assert!(subscription.secret.is_empty());
-    assert_eq!(
-        subscription.subscription_cli,
-        Some("/opt/example/bin/codex".into())
-    );
-    let config: Value = serde_json::from_str(
-        &subscription
-            .env
-            .iter()
-            .find(|(name, _)| name == "CODEX_CONFIG")
-            .unwrap()
-            .1,
-    )
-    .unwrap();
-    assert_eq!(config["model_provider"], "openai");
-    assert_eq!(config["openai_base_url"], "");
-    assert_eq!(
-        config["chatgpt_base_url"],
-        "https://chatgpt.com/backend-api/"
-    );
-    assert!(config.get("model").is_none());
-    assert_eq!(config["tools"]["update_plan"]["enabled"], true);
-    assert!(config.get("collaboration_mode").is_none());
-    assert!(
-        subscription
-            .env
-            .iter()
-            .all(|(name, _)| name != "CODEX_HOME"),
-        "the default account keeps the CLI's own home"
-    );
-    // An account directory selects an isolated Codex login for the adapter and
-    // for the quota probe; a relative path would pick an account by accident.
-    let home = std::env::temp_dir().join("lithe-codex-account");
-    let mut isolated = launch("codex-acp", provider());
-    isolated.authentication = AgentAuthentication::CodexSubscription;
-    isolated.provider = None;
-    isolated.codex_home = Some(home.clone());
-    let isolated = resolve(isolated).unwrap();
-    assert!(isolated
-        .env
-        .contains(&("CODEX_HOME".to_owned(), home.to_string_lossy().into_owned())));
-    assert_eq!(isolated.codex_home, Some(home));
-    let mut relative_home = launch("codex-acp", provider());
-    relative_home.authentication = AgentAuthentication::CodexSubscription;
-    relative_home.provider = None;
-    relative_home.codex_home = Some(PathBuf::from("relative/account"));
-    assert!(resolve(relative_home).err().unwrap().contains("absolute"));
-
-    // Statistics changes only this process's inference route; native account,
-    // quota and model ownership survive without installing a second provider.
-    let environment = subscription.env.clone();
-    subscription::observe_model_calls(&mut subscription, "http://127.0.0.1:1234/lithe-fixture")
-        .unwrap();
-    for ((name, before), (_, after)) in environment.iter().zip(&subscription.env) {
-        if name == "CODEX_CONFIG" {
-            let mut after: Value = serde_json::from_str(after).unwrap();
-            assert_eq!(
-                after["openai_base_url"],
-                "http://127.0.0.1:1234/lithe-fixture/backend-api/codex"
-            );
-            after["openai_base_url"] = json!("");
-            assert_eq!(after, serde_json::from_str::<Value>(before).unwrap());
-        } else {
-            assert_eq!(before, after);
-        }
-    }
-    assert!(subscription.gateway.is_none() && subscription.secret.is_empty());
-
-    let codex = resolve(launch("codex-acp", provider())).unwrap();
-    assert!(codex.command.ends_with("node_modules/.bin/codex-acp") || cfg!(windows));
-    // The adapter drives the user's own Codex; the key never enters the environment.
-    assert_eq!(
-        codex.env[0],
-        ("CODEX_PATH".to_owned(), "/opt/example/bin/codex".to_owned())
-    );
-    let config: Value = serde_json::from_str(&codex.env[1].1).unwrap();
-    assert_eq!(codex.env[1].0, "CODEX_CONFIG");
-    assert_eq!(config["tools"]["update_plan"]["enabled"], true);
-    assert!(config.get("model").is_none());
-    assert!(config.get("collaboration_mode").is_none());
-    assert_eq!(
-        codex.gateway.unwrap().base_url,
-        "https://gateway.example.com/v1"
-    );
-    let with_model = resolve(launch(
-        "codex-acp",
-        ProviderCredentials {
-            model: Some(" gpt-5.5 ".into()),
-            ..provider()
-        },
-    ))
-    .unwrap();
-    let config: Value = serde_json::from_str(&with_model.env[1].1).unwrap();
-    assert_eq!(with_model.env.len(), 2);
-    assert_eq!(with_model.env[0], codex.env[0]);
-    assert_eq!(with_model.env[1].0, "CODEX_CONFIG");
-    assert_eq!(
-        config,
-        json!({"model":"gpt-5.5","tools":{"update_plan":{"enabled":true}}})
-    );
-    let missing_cli = resolve_with(launch("codex-acp", provider()), &|_| None)
-        .err()
-        .unwrap();
-    assert!(
-        missing_cli.contains("Codex CLI was not found"),
-        "{missing_cli}"
-    );
-    let old_cli = resolve_with(launch("codex-acp", provider()), &|_| {
-        Some(environment::DetectedTool {
-            version: "0.150.0".into(),
-            path: "/opt/example/bin/codex".into(),
-        })
-    })
-    .err()
-    .unwrap();
-    assert!(old_cli.contains("0.160.1 or later"), "{old_cli}");
-    assert!(!with_model
-        .env
-        .iter()
-        .any(|(_, value)| value.contains("test-key-123")));
-
-    let claude = resolve(launch(
-        "claude-acp",
-        ProviderCredentials {
-            model: Some("claude-sonnet-5".into()),
-            ..anthropic
-        },
-    ))
-    .unwrap();
-    // Claude uses ACP session options; the key never enters the adapter's
-    // launch environment or arguments.
-    let sign_in = claude.gateway.expect("gateway sign-in");
-    assert_eq!(sign_in.base_url, "https://api.example");
-    assert_eq!(
-        sign_in.headers,
-        [("x-api-key".to_owned(), "test-key-123".to_owned())]
-    );
-    assert_eq!(sign_in.model.as_deref(), Some("claude-sonnet-5"));
-    assert_eq!(
-        claude.env,
-        [(
-            "CLAUDE_CODE_EXECUTABLE".to_owned(),
-            "/opt/example/bin/claude".to_owned()
-        )]
-    );
-    let mismatch = resolve(launch("claude-acp", provider())).err().unwrap();
-    assert!(mismatch.contains("Anthropic Messages"), "{mismatch}");
-    assert!(resolve(launch("unknown", provider())).is_err());
-    let _ = std::fs::remove_dir_all(&data);
-}
-
-#[test]
-fn windows_batch_shims_are_only_forwarded_to_adapters_that_shell_out() {
-    let claude = catalog::find("claude-acp").unwrap().cli.as_ref().unwrap();
-    let codex = catalog::find("codex-acp").unwrap().cli.as_ref().unwrap();
-    let tool = |path: &str| environment::DetectedTool {
-        version: "2.1.303".into(),
-        path: path.into(),
-    };
-    let shim = tool("C:/tools/claude.cmd");
-
-    let claude_shim = cli_path_env(claude, &shim);
-    if cfg!(windows) {
-        assert_eq!(claude_shim, None);
-    } else {
-        assert_eq!(
-            claude_shim,
-            Some((
-                "CLAUDE_CODE_EXECUTABLE".into(),
-                "C:/tools/claude.cmd".into()
-            ))
-        );
-    }
-    assert_eq!(
-        cli_path_env(codex, &shim),
-        Some(("CODEX_PATH".into(), "C:/tools/claude.cmd".into()))
-    );
-    assert_eq!(
-        cli_path_env(claude, &tool("C:/tools/claude.exe")),
-        Some((
-            "CLAUDE_CODE_EXECUTABLE".into(),
-            "C:/tools/claude.exe".into()
-        ))
-    );
-}
-
-#[test]
-fn invalid_settings_are_reported_without_starting_a_process() {
-    let launch = |command: &str, key: &str, url: &str, protocol: ProviderProtocol| {
-        custom_launch(
-            command,
-            ProviderCredentials {
-                protocol,
-                api_key: key.into(),
-                base_url: url.into(),
-                ..provider()
-            },
-        )
-    };
-    let responses = ProviderProtocol::Responses;
-    let cases = [
-        (launch(" ", "key", "https://h/v1", responses), "executable"),
-        (
-            launch(
-                "/lithe/nonexistent-acp-agent",
-                " ",
-                "https://h/v1",
-                responses,
-            ),
-            "API key",
-        ),
-        (
-            launch(
-                "/lithe/nonexistent-acp-agent",
-                "key",
-                "http://h/v1",
-                responses,
-            ),
-            "https",
-        ),
-        (
-            launch(
-                "/lithe/nonexistent-acp-agent",
-                "key",
-                "https://h",
-                ProviderProtocol::AnthropicMessages,
-            ),
-            "Responses API",
-        ),
-    ];
-    for (launch, expected) in cases {
-        let (sender, receiver) = mpsc::channel();
-        let handle = AgentHandle::open(
-            launch,
-            Arc::new(move |event| {
-                let _ = sender.send(event);
-            }),
-        )
-        .expect("worker starts");
-        match receiver.recv_timeout(WAIT) {
-            Ok(AgentEvent::Stopped {
-                message: Some(message),
-            }) => {
-                assert!(message.contains(expected), "{message}");
-                assert!(
-                    !message.contains("Could not start"),
-                    "no process for invalid settings"
-                );
-            }
-            other => panic!("expected stopped, got {other:?}"),
-        }
-        handle.close();
-    }
-}
-
-// The timing harness starts this test cold: a missing custom command must not
-// wait for Node/npm version probes before reporting its spawn error.
-#[test]
-fn spawn_failure_reports_stopped_with_a_message() {
-    let (sender, receiver) = mpsc::channel();
-    let launch = custom_launch("/lithe/nonexistent-acp-agent", provider());
-    let handle = AgentHandle::open(
-        launch,
-        Arc::new(move |event| {
-            let _ = sender.send(event);
-        }),
-    )
-    .expect("worker starts");
-    match receiver.recv_timeout(WAIT) {
-        Ok(AgentEvent::Stopped {
-            message: Some(message),
-        }) => {
-            assert!(message.contains("Could not start the Agent"));
-        }
-        other => panic!("expected stopped with message, got {other:?}"),
-    }
-    handle.close();
-}
-
-// Protect the actual SDK wire boundary, not just the local command DTO.
-#[tokio::test]
-async fn selected_files_reach_the_agent_as_acp_resource_links() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    let fixture = fixture();
-    for name in ["promptWithFiles", "fileOnlyPrompt"] {
-        harness.send(fixture["commands"][name].clone());
-        let request = harness.agent.expect("session/prompt").await;
-        let content = request["params"]["prompt"]
-            .as_array()
-            .expect("prompt content");
-        let files = fixture["commands"][name]["files"].as_array().unwrap();
-        let offset = usize::from(name == "promptWithFiles");
-        // A percent-encoded path is repeated once, in readable form, after the links.
-        let decoded_paths: Vec<_> = files
-            .iter()
-            .filter_map(|file| url::Url::parse(file["uri"].as_str()?).ok())
-            .filter(|uri| uri.path().contains('%'))
-            .filter_map(|uri| uri.to_file_path().ok())
-            .map(|path| format!("📎 {}", path.display()))
-            .collect();
-        assert_eq!(
-            content.len(),
-            files.len() + offset + 1 + usize::from(!decoded_paths.is_empty())
-        );
-        if !decoded_paths.is_empty() {
-            assert_eq!(
-                content[offset + files.len()]["text"],
-                decoded_paths.join("\n")
-            );
-        }
-        if offset == 1 {
-            assert_eq!(
-                content[0],
-                json!({ "type": "text", "text": "Explain these files" })
-            );
-        }
-        for (actual, file) in content[offset..offset + files.len()].iter().zip(files) {
-            assert_eq!(
-                actual,
-                &json!({ "type": "resource_link", "uri": file["uri"], "name": file["name"] })
-            );
-        }
-        assert!(content.last().unwrap()["text"]
-            .as_str()
-            .unwrap()
-            .contains("openedWorkspaceRoot"));
-        harness
-            .agent
-            .reply(&request, json!({ "stopReason": "end_turn" }))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-    }
-    harness.stop().await.expect("owned connection stopped");
-}
-
-#[tokio::test]
-async fn invalid_file_reference_does_not_reserve_or_finish_a_turn() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("session-1").await;
-    for files in [
-        json!([{ "uri": "https://example.com/file.txt", "name": "file.txt" }]),
-        json!([{ "uri": "file:///example/file.txt?secret", "name": "file.txt" }]),
-        json!((0..33)
-            .map(
-                |index| json!({ "uri": format!("file:///example/{index}.txt"), "name": "file.txt" })
-            )
-            .collect::<Vec<_>>()),
-    ] {
-        harness.send(
-            json!({ "kind": "prompt", "sessionId": "session-1", "text": "Read", "files": files }),
-        );
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::RequestFailed {
-                session_id: Some(_),
-                ..
-            }
-        ));
-    }
-    harness.send(fixture()["commands"]["prompt"].clone());
-    let request = harness.agent.expect("session/prompt").await;
-    assert_eq!(
-        request["params"]["prompt"][0],
-        json!({ "type": "text", "text": "Explain this project" })
-    );
-    harness
-        .agent
-        .reply(&request, json!({ "stopReason": "end_turn" }))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    harness.stop().await.expect("owned connection stopped");
-}
-
-// The opened nested project remains the scope of new, steered and restored
-// turns. Test the actual ACP wire and replay, including text-only adapters.
-#[tokio::test(flavor = "current_thread")]
-async fn nested_workspace_scope_survives_new_restore_steering_and_replay() {
-    let fixture = fixture()["workspaceContext"].clone();
-    for relative_root in fixture["relativeRoots"].as_array().unwrap() {
-        let cwd = std::env::temp_dir().join(relative_root.as_str().unwrap());
-        let mut harness = Harness::start_in_workspace(false, gateway(), cwd.clone());
-        harness
-            .agent
-            .handshake_with_steering(true, "text-only-agent")
-            .await;
-        assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-        harness.send(json!({ "kind": "newSession", "token": "new" }));
-        let new = harness.agent.expect("session/new").await;
-        assert_eq!(new["params"]["cwd"], cwd.to_str().unwrap());
-        harness
-            .agent
-            .reply(&new, json!({ "sessionId": "nested" }))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::SessionCreated { .. }
-        ));
-
-        let question = fixture["question"].as_str().unwrap();
-        harness.send(json!({ "kind": "prompt", "sessionId": "nested", "text": question }));
-        let prompt = harness.agent.expect("session/prompt").await;
-        let content = prompt["params"]["prompt"].as_array().unwrap();
-        assert_eq!(content[0], json!({ "type": "text", "text": question }));
-        let context = content.last().unwrap().clone();
-        let context_text = context["text"].as_str().unwrap();
-        let metadata: Value = serde_json::from_str(context_text.lines().nth(2).unwrap()).unwrap();
-        assert_eq!(metadata["openedWorkspaceRoot"], cwd.to_str().unwrap());
-
-        harness.send(json!({ "kind": "steer", "token": "supplement", "sessionId": "nested", "text": fixture["supplement"] }));
-        let steer = harness.agent.expect("_session/steering").await;
-        assert_eq!(
-            steer["params"]["prompt"].as_array().unwrap().last(),
-            Some(&context)
-        );
-        harness
-            .agent
-            .reply(&steer, json!({ "outcome": "injected" }))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::SteeringResult { .. }
-        ));
-        harness
-            .agent
-            .reply(&prompt, json!({ "stopReason": "end_turn" }))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-
-        harness.send(json!({ "kind": "loadSession", "token": "restore", "sessionId": "nested" }));
-        let load = harness.agent.expect("session/load").await;
-        assert_eq!(load["params"]["cwd"], new["params"]["cwd"]);
-        let echo = |text: &str| {
-            json!({ "jsonrpc": "2.0", "method": "session/update", "params": {
-                "sessionId": "nested", "update": { "sessionUpdate": "user_message_chunk",
-                    "content": { "type": "text", "text": text } }
-            }})
-        };
-        harness.agent.write(echo(context_text)).await;
-        harness
-            .agent
-            .write(echo(&format!("{question}\n\n{context_text}")))
-            .await;
-        match harness.event().await {
-            AgentEvent::Update { update, .. } => assert_eq!(update["content"]["text"], question),
-            other => panic!("expected original user message, got {other:?}"),
-        }
-        harness.agent.reply(&load, json!({})).await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::SessionLoaded { .. }
-        ));
-        harness.send(json!({ "kind": "prompt", "sessionId": "nested", "text": "Continue explaining this project" }));
-        let resumed = harness.agent.expect("session/prompt").await;
-        assert_eq!(
-            resumed["params"]["prompt"].as_array().unwrap().last(),
-            Some(&context)
-        );
-        harness
-            .agent
-            .reply(&resumed, json!({ "stopReason": "end_turn" }))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-        let title = format!(
-            "{question}\n\n{}",
-            context_text.chars().take(300).collect::<String>()
-        );
-        harness.agent.write(json!({ "jsonrpc": "2.0", "method": "session/update", "params": {
-            "sessionId": "nested", "update": { "sessionUpdate": "session_info_update", "title": title }
-        }})).await;
-        match harness.event().await {
-            AgentEvent::Update { update, .. } => assert_eq!(update["title"], question),
-            other => panic!("expected clean live title, got {other:?}"),
-        }
-        harness.send(json!({ "kind": "listSessions", "token": "history" }));
-        let list = harness.agent.expect("session/list").await;
-        harness
-            .agent
-            .reply(
-                &list,
-                json!({ "sessions": [{ "sessionId": "nested", "cwd": cwd, "title": title }] }),
-            )
-            .await;
-        match harness.event().await {
-            AgentEvent::Sessions { sessions, .. } => {
-                assert_eq!(sessions[0].title.as_deref(), Some(question))
-            }
-            other => panic!("expected clean history title, got {other:?}"),
-        }
-        assert_eq!(harness.stop().await, Ok(()));
-    }
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn native_slash_command_reaches_acp_without_extra_context_or_arguments() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("commands").await;
-    for text in [
-        "/usage",
-        "/compact preserve project structure",
-        "/model example-model",
-    ] {
-        harness.send(json!({ "kind": "prompt", "sessionId": "commands", "text": text }));
-        let prompt = harness.agent.expect("session/prompt").await;
-        assert_eq!(
-            prompt["params"]["prompt"],
-            json!([{ "type": "text", "text": text }])
-        );
-        harness
-            .agent
-            .reply(&prompt, json!({ "stopReason": "end_turn" }))
-            .await;
-        assert!(matches!(
-            harness.event().await,
-            AgentEvent::TurnFinished { .. }
-        ));
-    }
-    let mut command = fixture()["commands"]["nativeCommandWithFiles"].clone();
-    command["sessionId"] = json!("commands");
-    harness.send(command);
-    let prompt = harness.agent.expect("session/prompt").await;
-    assert_eq!(
-        prompt["params"]["prompt"],
-        fixture()["workspaceContext"]["nativeCommandWithFilesContent"]
-    );
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason":"end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn context_only_titles_are_missing_in_live_updates_and_history() {
-    let mut harness = Harness::ready().await;
-    harness.open_session("file-only").await;
-    let mut command = fixture()["commands"]["fileOnlyPrompt"].clone();
-    command["sessionId"] = json!("file-only");
-    harness.send(command);
-    let prompt = harness.agent.expect("session/prompt").await;
-    let content = prompt["params"]["prompt"].as_array().unwrap();
-    assert_eq!(content[0]["type"], "resource_link");
-    let context = content.last().unwrap()["text"].as_str().unwrap();
-    let titles = [
-        context.to_owned(),
-        context.chars().take(300).collect(),
-        context
-            .split_whitespace()
-            .collect::<Vec<_>>()
-            .join(" ")
-            .chars()
-            .take(300)
-            .collect(),
-        " \n\t ".into(),
-    ];
-    harness
-        .agent
-        .reply(&prompt, json!({"stopReason":"end_turn"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::TurnFinished { .. }
-    ));
-
-    let expected = fixture()["events"]["sessionsWithoutGeneratedTitles"].clone();
-    let sessions: Vec<_> = expected["sessions"].as_array().unwrap().iter().zip(&titles)
-        .map(|(session, title)| json!({"sessionId":session["sessionId"], "cwd":std::env::temp_dir(), "title":title}))
-        .collect();
-    harness.send(json!({"kind":"listSessions", "token":"untitled-history"}));
-    let list = harness.agent.expect("session/list").await;
-    harness
-        .agent
-        .reply(&list, json!({"sessions":sessions}))
-        .await;
-    assert_eq!(
-        serde_json::to_value(harness.event().await).unwrap(),
-        expected
-    );
-
-    for title in titles {
-        harness.agent.write(json!({"jsonrpc":"2.0", "method":"session/update", "params":{
-            "sessionId":"file-only", "update":{"sessionUpdate":"session_info_update", "title":title, "_meta":{"preserved":true}}
-        }})).await;
-        match harness.event().await {
-            AgentEvent::Update { update, .. } => {
-                assert!(
-                    update["title"].is_null(),
-                    "A removed title must not hide UI fallbacks"
-                );
-                assert_eq!(update["_meta"]["preserved"], true);
-            }
-            other => panic!("expected missing live title, got {other:?}"),
-        }
-    }
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-/// The adapter owns login and reports identity before any session can start.
-async fn subscription_initialize(harness: &mut Harness, account: bool) {
-    let initialize = harness.agent.expect("initialize").await;
-    harness
-        .agent
-        .reply(
-            &initialize,
-            json!({
-                "protocolVersion": 1,
-                "authMethods": [{"id":"chat-gpt","name":"ChatGPT"}],
-                "agentCapabilities": {"_meta":{"authStatus":{}}}
-            }),
-        )
-        .await;
-    subscription_identity(harness, account).await;
-}
-
-async fn subscription_identity(harness: &mut Harness, account: bool) {
-    harness.agent.write(json!({"jsonrpc":"2.0","method":"_auth/status_update","params":{
-        "authStatus": if account {
-            json!({"kind":"account","label":"ChatGPT Plus","account":{"email":"person@example.test","plan":"plus"}})
-        } else { json!({"kind":"none","label":"Not logged in"}) }
-    }})).await;
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn subscription_reuses_account_without_api_key_or_browser_login() {
-    let mut harness = Harness::start_with(true);
-    subscription_initialize(&mut harness, true).await;
-    assert!(matches!(harness.event().await, AgentEvent::Account { .. }));
-    assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-    harness.send(json!({"kind":"newSession","token":"new"}));
-    // No authenticate call is needed for an already reported account.
-    let request = harness.agent.expect("session/new").await;
-    harness
-        .agent
-        .reply(&request, json!({"sessionId":"subscription-session"}))
-        .await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::SessionCreated { .. }
-    ));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn subscription_login_requires_explicit_command_and_confirmed_account() {
-    let mut harness = Harness::start_with(true);
-    subscription_initialize(&mut harness, false).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::AuthenticationRequired
-    ));
-    harness.send(json!({"kind":"authenticate"}));
-    assert!(matches!(harness.event().await, AgentEvent::Authenticating));
-    let request = harness.agent.expect("authenticate").await;
-    assert_eq!(request["params"], json!({"methodId":"chat-gpt"}));
-    // A response can be dispatched before its separate account notification.
-    harness.agent.reply(&request, json!({})).await;
-    subscription_identity(&mut harness, true).await;
-    assert!(matches!(harness.event().await, AgentEvent::Account { .. }));
-    assert!(matches!(harness.event().await, AgentEvent::Ready { .. }));
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn subscription_login_can_stop_without_waiting_for_browser() {
-    let mut harness = Harness::start_with(true);
-    subscription_initialize(&mut harness, false).await;
-    assert!(matches!(
-        harness.event().await,
-        AgentEvent::AuthenticationRequired
-    ));
-    harness.send(json!({"kind":"authenticate"}));
-    assert!(matches!(harness.event().await, AgentEvent::Authenticating));
-    harness.agent.expect("authenticate").await;
-    assert_eq!(harness.stop().await, Ok(()));
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn subscription_account_change_disconnects_before_reusing_old_identity() {
-    let mut harness = Harness::start_with(true);
-    subscription_initialize(&mut harness, true).await;
-    harness.event().await;
-    harness.event().await;
-    subscription_identity(&mut harness, false).await;
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .expect("bounded account change")
-        .unwrap();
-    assert!(result.unwrap_err().contains("account changed"));
-}
-
-#[test]
-fn subscription_rejects_claude_custom_agents_and_ambiguous_api_credentials() {
-    for agent in [None, Some("claude-acp"), Some("codex-acp")] {
-        let mut launch = custom_launch("fixture-agent", provider());
-        launch.authentication = AgentAuthentication::CodexSubscription;
-        launch.agent_id = agent.map(str::to_owned);
-        assert!(resolve_with(launch, &|_| None)
-            .err()
-            .unwrap()
-            .contains("only available for Codex"));
-    }
-}
-
-#[tokio::test(flavor = "current_thread")]
-async fn subscription_login_deadline_does_not_leave_a_waiting_connection() {
-    let mut harness = Harness::start_with(true);
-    subscription_initialize(&mut harness, false).await;
-    harness.event().await;
-    harness.send(json!({"kind":"authenticate"}));
-    harness.event().await;
-    harness.agent.expect("authenticate").await;
-    tokio::time::pause();
-    tokio::time::advance(subscription::LOGIN_TIMEOUT + Duration::from_secs(1)).await;
-    let result = tokio::time::timeout(WAIT, &mut harness.connection)
-        .await
-        .expect("bounded login deadline")
-        .unwrap();
-    assert!(result.unwrap_err().contains("sign-in timed out"));
-}
-
-#[test]
-fn model_calls_are_attributed_only_to_a_sole_running_prompt() {
-    let turns: RunningTurns = Arc::new(Mutex::new(HashMap::new()));
-    let turn = |cancelling| RunningTurn {
-        generation: 1,
-        cancelling,
-        retry: tokio::sync::watch::channel(prompt_retry::State::new(false)).0,
-        steering: Arc::new(steering::Turn::default()),
-    };
-    assert_eq!(sole_running_session(&turns), None);
-    turns
-        .lock()
-        .unwrap()
-        .insert("session-1".into(), turn(false));
-    // The owner carries the turn generation so late calls can be told apart.
-    let owner = model_proxy::CallOwner {
-        session: "session-1".into(),
-        generation: 1,
-    };
-    assert_eq!(sole_running_session(&turns), Some(owner.clone()));
-    // A cancelling turn can still issue requests, but they are not attributed.
-    turns.lock().unwrap().insert("session-2".into(), turn(true));
-    assert_eq!(sole_running_session(&turns), Some(owner));
-    // Concurrent prompts make a provider request ambiguous.
-    turns
-        .lock()
-        .unwrap()
-        .insert("session-3".into(), turn(false));
-    assert_eq!(sole_running_session(&turns), None);
-}
-
-#[test]
-fn model_call_events_use_the_fixture_shape() {
-    let expected = fixture()["events"]["modelCall"].clone();
-    let call: ModelCall = ModelCall {
-        api: ModelApi::AnthropicMessages,
-        model: Some("claude-sonnet".into()),
-        status: 200,
-        streaming: true,
-        first_token_ms: Some(820),
-        duration_ms: 6400,
-        usage: Some(ModelCallUsage {
-            input_tokens: 1200,
-            cache_read_tokens: 42000,
-            cache_write_tokens: 800,
-            output_tokens: 640,
-            reasoning_tokens: None,
-        }),
-        context: Some(ContextComposition {
-            system_prompt_tokens: 4500,
-            tool_tokens: 3500,
-            mcp_tool_tokens: 14000,
-            message_tokens: 22000,
-            tool_count: 18,
-            mcp_tool_count: 40,
-            scaled_to_usage: true,
-        }),
-        auxiliary: false,
-    };
-    let statistics = crate::ModelCallStatistics::of_call(&call, &mut false);
-    let event = AgentEvent::ModelCall {
-        session_id: Some("session-1".into()),
-        after_turn_finished: false,
-        call: call.clone(),
-        statistics: statistics.clone(),
-    };
-    assert_eq!(serde_json::to_value(event).unwrap(), expected);
-    let late = AgentEvent::ModelCall {
-        session_id: Some("session-1".into()),
-        after_turn_finished: true,
-        call,
-        statistics,
-    };
-    assert_eq!(
-        serde_json::to_value(late).unwrap(),
-        fixture()["events"]["modelCallAfterTurn"]
-    );
-}
-
-/// A fake agent that starts one background task, records its PID, and exits
-/// once the test opens `gate` for writing. The agent never answers ACP, so its
-/// own exit is what ends the connection.
-///
-/// Dropping it ends the task and removes the temporary directory and FIFO, so
-/// an assertion or timeout panic cannot leave a 300-second task behind.
-#[cfg(unix)]
-struct AgentWithTask {
-    handle: Option<AgentHandle>,
-    directory: PathBuf,
-    gate: PathBuf,
-    task: u32,
-    /// Cleared once the test observed the task gone; its PID may then be reused.
-    task_may_run: bool,
-}
-
-#[cfg(unix)]
-impl AgentWithTask {
-    fn start(name: &str) -> Self {
-        use std::os::unix::fs::PermissionsExt;
-        let directory = std::env::temp_dir().join(format!("lithe-{name}-{}", std::process::id()));
-        let _ = std::fs::remove_dir_all(&directory);
-        std::fs::create_dir_all(&directory).unwrap();
-        let pid_file = directory.join("task.pid");
-        let gate = directory.join("gate");
-        let gate_path = std::ffi::CString::new(gate.to_str().unwrap()).unwrap();
-        // SAFETY: creates a FIFO at a path owned by this test.
-        assert_eq!(unsafe { libc::mkfifo(gate_path.as_ptr(), 0o600) }, 0);
-        let script = directory.join("agent.sh");
-        std::fs::write(
-            &script,
-            format!(
-                "#!/bin/sh\nsleep 300 &\necho $! > '{}'\nread _ < '{}'\n",
-                pid_file.display(),
-                gate.display()
-            ),
-        )
-        .unwrap();
-        std::fs::set_permissions(&script, std::fs::Permissions::from_mode(0o755)).unwrap();
-        let mut launch = custom_launch(script.to_str().unwrap(), provider());
-        launch.process_scope = Some("test-scope".into());
-        let handle = AgentHandle::open(launch, Arc::new(|_| {})).expect("worker starts");
-        let task = wait_for("the fake agent's task PID", || {
-            std::fs::read_to_string(&pid_file)
-                .ok()
-                .and_then(|text| text.trim().parse::<u32>().ok())
-        });
-        Self {
-            handle: Some(handle),
-            directory,
-            gate,
-            task,
-            task_may_run: true,
-        }
-    }
-
-    fn handle(&self) -> &AgentHandle {
-        self.handle.as_ref().expect("the connection is still open")
-    }
-
-    /// Lets the agent exit, then closes the connection. The task stays owned
-    /// by this value until it is dropped.
-    fn finish(&mut self) {
-        use std::os::unix::fs::OpenOptionsExt;
-        let gate = self.gate.clone();
-        wait_for("the fake agent to read its gate", || {
-            std::fs::OpenOptions::new()
-                .write(true)
-                .custom_flags(libc::O_NONBLOCK)
-                .open(&gate)
-                .ok()
-                .and_then(|mut fifo| std::io::Write::write_all(&mut fifo, b"\n").ok())
-        });
-        if let Some(handle) = self.handle.take() {
-            handle.close();
-        }
-    }
-}
-
-#[cfg(unix)]
-impl Drop for AgentWithTask {
-    fn drop(&mut self) {
-        if self.task_may_run && process_is_alive(self.task) {
-            kill_test_process(self.task);
-        }
-        drop(self.handle.take());
-        let _ = std::fs::remove_dir_all(&self.directory);
-    }
-}
-
-/// Polls an external process boundary with a local deadline.
-#[cfg(unix)]
-fn wait_for<T>(what: &str, mut probe: impl FnMut() -> Option<T>) -> T {
-    let deadline = std::time::Instant::now() + WAIT;
-    loop {
-        if let Some(value) = probe() {
-            return value;
-        }
-        assert!(
-            std::time::Instant::now() < deadline,
-            "timed out waiting for {what}"
-        );
-        // test-stability: allow(rust-real-sleep) reason: the observed state belongs to a separate OS process that offers no notification channel to the test.
-        std::thread::sleep(Duration::from_millis(10));
-    }
-}
-
-#[cfg(unix)]
-fn process_is_alive(pid: u32) -> bool {
-    // SAFETY: signal 0 only checks whether the process exists.
-    unsafe { libc::kill(pid as libc::pid_t, 0) == 0 }
-}
-
-#[cfg(unix)]
-fn kill_test_process(pid: u32) {
-    // SAFETY: ends a background task this test started.
-    unsafe {
-        libc::kill(pid as libc::pid_t, libc::SIGKILL);
-    }
-}
-
-// Regression: a task the user chose to keep must survive closing the
-// connection, which previously killed the agent's whole process group.
-#[cfg(unix)]
-#[test]
-fn preserved_agent_task_survives_closing_the_connection() {
-    let mut agent = AgentWithTask::start("preserve");
-    agent
-        .handle()
-        .send(AgentCommand::PreserveProcesses {
-            process_ids: vec![agent.task],
-        })
-        .expect("preserve is accepted");
-    agent.finish();
-    assert!(
-        process_is_alive(agent.task),
-        "preserved task was ended with the agent"
-    );
-}
-
-#[cfg(unix)]
-#[test]
-fn closing_without_preserved_tasks_still_ends_the_agent_tree() {
-    let mut agent = AgentWithTask::start("tree");
-    agent.finish();
-    let ended = std::time::Instant::now() + WAIT;
-    while process_is_alive(agent.task) && std::time::Instant::now() < ended {
-        // test-stability: allow(rust-real-sleep) reason: the killed task is reaped by launchd, which offers no notification channel to the test.
-        std::thread::sleep(Duration::from_millis(10));
-    }
-    let gone = !process_is_alive(agent.task);
-    agent.task_may_run = !gone;
-    assert!(gone, "agent task outlived the connection");
-}
-
-// Claude subscription mode must launch the signed-in CLI without any API route,
-// key or model pin, and must stay limited to the Claude adapter.
-#[test]
-fn claude_subscription_launches_the_signed_in_cli_without_a_route() {
-    struct Cleanup(PathBuf);
-    impl Drop for Cleanup {
-        fn drop(&mut self) {
-            let _ = std::fs::remove_dir_all(&self.0);
-        }
-    }
-    let data =
-        std::env::temp_dir().join(format!("lithe-claude-subscription-{}", std::process::id()));
-    let _cleanup = Cleanup(data.clone());
-    let _ = std::fs::remove_dir_all(&data);
-    let launch = |agent_id: &str| AgentLaunch {
-        agent_id: Some(agent_id.into()),
-        command: None,
-        args: vec![],
-        cwd: std::env::temp_dir(),
-        data_directory: Some(data.clone()),
-        provider: None,
-        authentication: AgentAuthentication::ClaudeSubscription,
-        observe_model_calls: false,
-        observe_subagents: false,
-        process_scope: None,
-        claude_config_dir: None,
-        context_limits: Default::default(),
-        codex_home: None,
-    };
-    let claude_cli = |command: &str| {
-        (command == "claude").then(|| environment::DetectedTool {
-            version: "2.1.309".into(),
-            path: "/opt/example/bin/claude".into(),
-        })
-    };
-    let not_installed = resolve_with(launch("claude-acp"), &claude_cli)
-        .err()
-        .unwrap();
-    assert!(not_installed.contains("not installed"), "{not_installed}");
-    fake_install(&data, "claude-acp");
-    fake_install(&data, "codex-acp");
-
-    let resolved = resolve_with(launch("claude-acp"), &claude_cli).unwrap();
-    assert!(resolved.claude_subscription);
-    assert!(
-        resolved.gateway.is_none(),
-        "no API route may reach the adapter"
-    );
-    assert!(resolved.secret.is_empty());
-    assert!(
-        resolved.subscription_cli.is_none(),
-        "Codex quota and login must not run"
-    );
-    assert!(
-        resolved
-            .env
-            .iter()
-            .all(|(name, _)| !name.starts_with("ANTHROPIC_")),
-        "{:?}",
-        resolved.env
-    );
-    if !cfg!(windows) {
-        assert_eq!(
-            resolved.env,
-            vec![(
-                "CLAUDE_CODE_EXECUTABLE".to_owned(),
-                "/opt/example/bin/claude".to_owned()
-            )]
-        );
-    }
-    // Neither session option nor restore metadata carries a route or key.
-    assert!(session_routing::metadata(resolved.gateway.as_ref())
-        .unwrap()
-        .is_none());
-    assert!(
-        session_routing::restored_metadata(resolved.gateway.as_ref())
-            .unwrap()
-            .is_none()
-    );
-
-    let codex = resolve_with(launch("codex-acp"), &claude_cli)
-        .err()
-        .unwrap();
-    assert!(codex.contains("only available for Claude Agent"), "{codex}");
-    let missing_cli = resolve_with(launch("claude-acp"), &|_| None).err().unwrap();
-    assert!(!missing_cli.is_empty());
-    // An account directory selects the official CLI's isolated login and is
-    // exported unchanged; a relative path would pick an account by accident.
-    let account = std::env::temp_dir().join("lithe-claude-account");
-    let mut isolated = launch("claude-acp");
-    isolated.claude_config_dir = Some(account.clone());
-    let resolved = resolve_with(isolated, &claude_cli).unwrap();
-    assert!(resolved.env.contains(&(
-        "CLAUDE_CONFIG_DIR".to_owned(),
-        account.to_string_lossy().into_owned()
-    )));
-    let mut relative_account = launch("claude-acp");
-    relative_account.claude_config_dir = Some(PathBuf::from("relative/account"));
-    assert!(resolve_with(relative_account, &claude_cli)
-        .err()
-        .unwrap()
-        .contains("absolute"));
-    let mut relative = launch("claude-acp");
-    relative.cwd = PathBuf::from("relative/workspace");
-    assert!(resolve_with(relative, &claude_cli)
-        .err()
-        .unwrap()
-        .contains("absolute"));
-}
-
-// The adapter's own sign-in report decides; an absent report never blocks.
-#[tokio::test(flavor = "current_thread", start_paused = true)]
-async fn claude_subscription_rejects_only_a_signed_out_cli() {
-    let status = |kind: &str| subscription::AuthStatus {
-        kind: kind.into(),
-        account: None,
-    };
-
-    let (tx, mut rx) = tokio::sync::watch::channel(Some(status("none")));
-    assert_eq!(
-        claude_subscription::ensure_signed_in(&mut rx).await,
-        Err(claude_subscription::SIGN_IN_REQUIRED.to_owned())
-    );
-    for kind in ["account", "api_key", "external", "gateway"] {
-        tx.send_replace(Some(status(kind)));
-        assert_eq!(
-            claude_subscription::ensure_signed_in(&mut rx).await,
-            Ok(None),
-            "{kind}"
-        );
-    }
-    // The reported claude.ai account travels to the UI for display only.
-    let reported = subscription::Account {
-        email: Some("user@example.com".into()),
-        plan: Some("Claude Pro".into()),
-    };
-    tx.send_replace(Some(subscription::AuthStatus {
-        kind: "account".into(),
-        account: Some(reported.clone()),
-    }));
-    assert_eq!(
-        claude_subscription::ensure_signed_in(&mut rx).await,
-        Ok(Some(reported))
-    );
-
-    // A report that arrives after initialization is still honored.
-    let (late_tx, mut late_rx) = tokio::sync::watch::channel(None::<subscription::AuthStatus>);
-    let waiter =
-        tokio::spawn(async move { claude_subscription::ensure_signed_in(&mut late_rx).await });
-    tokio::time::sleep(Duration::from_secs(1)).await;
-    late_tx.send_replace(Some(status("none")));
-    assert!(waiter.await.unwrap().is_err());
-
-    // No report within the bound is "unknown": the connection continues and
-    // the session request surfaces any real authentication failure.
-    let (_silent_tx, mut silent_rx) = tokio::sync::watch::channel(None::<subscription::AuthStatus>);
-    assert_eq!(
-        claude_subscription::ensure_signed_in(&mut silent_rx).await,
-        Ok(None)
-    );
-}
-
-// The user's context sizing reaches each Agent in the form that Agent understands.
-#[test]
-fn context_limits_are_delivered_as_codex_config_and_claude_environment() {
-    struct Cleanup(PathBuf);
-    impl Drop for Cleanup {
-        fn drop(&mut self) {
-            let _ = std::fs::remove_dir_all(&self.0);
-        }
-    }
-    let data = std::env::temp_dir().join(format!("lithe-context-limits-{}", std::process::id()));
-    let _cleanup = Cleanup(data.clone());
-    let _ = std::fs::remove_dir_all(&data);
-    fake_install(&data, "codex-acp");
-    fake_install(&data, "claude-acp");
-    let cli = |command: &str| match command {
-        "codex" => Some(environment::DetectedTool {
-            version: "0.160.1".into(),
-            path: "/opt/example/bin/codex".into(),
-        }),
-        "claude" => Some(environment::DetectedTool {
-            version: "2.1.310".into(),
-            path: "/opt/example/bin/claude".into(),
-        }),
-        _ => None,
-    };
-    let launch = |agent_id: &str, limits: ContextLimits| AgentLaunch {
-        agent_id: Some(agent_id.into()),
-        command: None,
-        args: vec![],
-        cwd: std::env::temp_dir(),
-        data_directory: Some(data.clone()),
-        provider: Some(if agent_id == "claude-acp" {
-            ProviderCredentials {
-                protocol: ProviderProtocol::AnthropicMessages,
-                base_url: "https://api.example/v1/messages".into(),
-                ..provider()
-            }
-        } else {
-            provider()
-        }),
-        authentication: AgentAuthentication::ApiKey,
-        observe_model_calls: false,
-        observe_subagents: false,
-        process_scope: None,
-        claude_config_dir: None,
-        context_limits: limits,
-        codex_home: None,
-    };
-    let env = |resolved: &ResolvedLaunch, name: &str| {
-        resolved
-            .env
-            .iter()
-            .find(|(key, _)| key == name)
-            .map(|(_, value)| value.clone())
-    };
-    let both = ContextLimits {
-        window_tokens: Some(200_000),
-        auto_compact_tokens: Some(150_000),
-    };
-
-    // Codex keeps both numbers as native configuration.
-    let codex = resolve_with(launch("codex-acp", both), &cli).unwrap();
-    let config: Value = serde_json::from_str(&env(&codex, "CODEX_CONFIG").unwrap()).unwrap();
-    assert_eq!(config["model_context_window"], 200_000);
-    assert_eq!(config["model_auto_compact_token_limit"], 150_000);
-    let unset = resolve_with(launch("codex-acp", ContextLimits::default()), &cli).unwrap();
-    let config: Value = serde_json::from_str(&env(&unset, "CODEX_CONFIG").unwrap()).unwrap();
-    assert!(config.get("model_context_window").is_none());
-    assert!(config.get("model_auto_compact_token_limit").is_none());
-    // A zero is "not set", never a window of nothing.
-    let zero = ContextLimits {
-        window_tokens: Some(0),
-        auto_compact_tokens: Some(0),
-    };
-    let zeroed = resolve_with(launch("codex-acp", zero), &cli).unwrap();
-    let config: Value = serde_json::from_str(&env(&zeroed, "CODEX_CONFIG").unwrap()).unwrap();
-    assert!(config.get("model_context_window").is_none());
-
-    // Claude Code has one knob: the threshold wins, else the context length.
-    let claude = resolve_with(launch("claude-acp", both), &cli).unwrap();
-    assert_eq!(
-        env(&claude, "CLAUDE_CODE_AUTO_COMPACT_WINDOW").as_deref(),
-        Some("150000")
-    );
-    let window_only = ContextLimits {
-        window_tokens: Some(200_000),
-        auto_compact_tokens: None,
-    };
-    let claude = resolve_with(launch("claude-acp", window_only), &cli).unwrap();
-    assert_eq!(
-        env(&claude, "CLAUDE_CODE_AUTO_COMPACT_WINDOW").as_deref(),
-        Some("200000")
-    );
-    let claude = resolve_with(launch("claude-acp", ContextLimits::default()), &cli).unwrap();
-    assert_eq!(env(&claude, "CLAUDE_CODE_AUTO_COMPACT_WINDOW"), None);
-
-    // The product sends camelCase JSON; omitted fields keep the Agent default.
-    let parsed: AgentLaunch = serde_json::from_value(serde_json::json!({
-        "cwd": "/tmp", "contextLimits": { "windowTokens": 123, "autoCompactTokens": 45 }
-    }))
-    .unwrap();
-    assert_eq!(
-        parsed.context_limits,
-        ContextLimits {
-            window_tokens: Some(123),
-            auto_compact_tokens: Some(45)
-        }
-    );
-    let omitted: AgentLaunch =
-        serde_json::from_value(serde_json::json!({ "cwd": "/tmp" })).unwrap();
-    assert_eq!(omitted.context_limits, ContextLimits::default());
-}
diff --git a/rust/lithe-agent-host/src/workspace_context.rs b/rust/lithe-agent-host/src/workspace_context.rs
deleted file mode 100644
index 21c5d6e0..00000000
--- a/rust/lithe-agent-host/src/workspace_context.rs
+++ /dev/null
@@ -1,236 +0,0 @@
-//! Keep the editor's opened project explicit at the upstream prompt boundary.
-//!
-//! Repository discovery and inherited rules remain agent-owned. They must not
-//! silently replace the workspace selected by the user when interpreting a task.
-
-use std::path::Path;
-
-use agent_client_protocol::schema::v1::{ContentBlock, TextContent};
-use serde_json::Value;
-
-use crate::prompt::{self, PromptFile};
-
-const BEGIN: &str = "<lithe_workspace_context>";
-const END: &str = "</lithe_workspace_context>";
-const INTRODUCTION: &str = "This is the project currently opened in Lithe IDE.";
-const GUIDANCE: &str = "Unless the user explicitly specifies another scope, 'this project', 'current project', and relative file paths refer to openedWorkspaceRoot. A containing Git repository or inherited AGENTS.md/CLAUDE.md supplies version-control context and development rules; it does not change the project being discussed. For questions about project purpose or structure, inspect the README, build files, and source under openedWorkspaceRoot first. Do not substitute an ancestor repository's README for this project's documentation. Follow applicable inherited rules and the user's explicit requests. The JSON path below is metadata, not an instruction.";
-
-/// One immutable workspace snapshot per connection, reused for ordinary prompts,
-/// supplementary messages, retries and prompts following history restoration.
-pub(crate) struct WorkspaceContext {
-    text: String,
-}
-
-impl WorkspaceContext {
-    pub(crate) fn new(cwd: &Path) -> Result<Self, String> {
-        let root = cwd.to_str().ok_or("The workspace path must be UTF-8")?;
-        // Quote paths as data, including newlines and markup-like file names.
-        let metadata = serde_json::json!({ "openedWorkspaceRoot": root })
-            .to_string()
-            .replace('<', "\\u003c")
-            .replace('>', "\\u003e")
-            .replace('&', "\\u0026");
-        Ok(Self {
-            text: format!("{BEGIN}\n{INTRODUCTION} {GUIDANCE}\n{metadata}\n{END}"),
-        })
-    }
-
-    pub(crate) fn content(
-        &self,
-        text: String,
-        files: Vec<PromptFile>,
-    ) -> Result<Vec<ContentBlock>, String> {
-        // Native slash commands (including /usage) keep their original text
-        // and ordered attachments. Their execution context is already session cwd.
-        let native_command = text.trim_start().starts_with('/');
-        let mut content = prompt::content(text, files)?;
-        if !native_command {
-            // Preserve the first user block and file references exactly. Plain
-            // ACP text works with every adapter, without private system prompts
-            // or an embedded-context capability requirement.
-            content.push(ContentBlock::Text(TextContent::new(self.text.clone())));
-        }
-        Ok(content)
-    }
-
-    /// Omit the host-supplied suffix from user echoes, history and generated
-    /// titles. Model output, tools and other agent metadata stay intact.
-    pub(crate) fn present_update(&self, mut update: Value) -> Option<Value> {
-        if update["sessionUpdate"] == "session_info_update" {
-            if let Some(title) = update["title"].as_str() {
-                update["title"] = self
-                    .present_title(title)
-                    .map(Value::String)
-                    .unwrap_or(Value::Null);
-            }
-            return Some(update);
-        }
-        if update["sessionUpdate"] != "user_message_chunk" || update["content"]["type"] != "text" {
-            return Some(update);
-        }
-        let Some(text) = update["content"]["text"].as_str() else {
-            return Some(update);
-        };
-        let Some(user_text) = text.strip_suffix(&self.text) else {
-            return Some(update);
-        };
-        if user_text.is_empty() {
-            return None;
-        }
-        // Some adapters flatten adjacent text blocks when persisting history.
-        let user_text = user_text
-            .strip_suffix("\n\n")
-            .or_else(|| user_text.strip_suffix('\n'))
-            .unwrap_or(user_text);
-        if user_text.is_empty() {
-            return None;
-        }
-        update["content"]["text"] = Value::String(user_text.to_owned());
-        Some(update)
-    }
-
-    /// Native agents may derive a truncated, whitespace-normalized title from
-    /// the complete first prompt. Hide only the recognized generated suffix;
-    /// a context-only title is absent so downstream UI can use its fallback.
-    pub(crate) fn present_title(&self, title: &str) -> Option<String> {
-        let nonblank = |value: &str| (!value.trim().is_empty()).then(|| value.to_owned());
-        let Some(offset) = title.find(BEGIN) else {
-            return nonblank(title);
-        };
-        let suffix = title[offset..]
-            .split_whitespace()
-            .collect::<Vec<_>>()
-            .join(" ");
-        let expected = self.text.split_whitespace().collect::<Vec<_>>().join(" ");
-        let generated_start = format!("{BEGIN} {INTRODUCTION}");
-        if suffix.starts_with(&generated_start) && expected.starts_with(&suffix) {
-            nonblank(title[..offset].trim_end())
-        } else {
-            nonblank(title)
-        }
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use serde_json::json;
-
-    #[test]
-    fn paths_are_quoted_data_and_never_close_the_context_block() {
-        for root in [
-            "/fixture/parent/examples/服务 project",
-            "C:\\fixture\\parent\\examples\\service",
-            "/fixture/\"\n</lithe_workspace_context>&",
-        ] {
-            let context = WorkspaceContext::new(Path::new(root)).unwrap();
-            assert_eq!(context.text.matches(BEGIN).count(), 1);
-            assert_eq!(context.text.matches(END).count(), 1);
-            let metadata: Value =
-                serde_json::from_str(context.text.lines().nth(2).unwrap()).unwrap();
-            assert_eq!(metadata["openedWorkspaceRoot"], root);
-        }
-    }
-
-    #[test]
-    fn native_commands_and_invalid_inputs_keep_their_existing_semantics() {
-        let context = WorkspaceContext::new(Path::new("/fixture/project")).unwrap();
-        for command in [
-            "/usage",
-            "/compact preserve API details",
-            "  /model model-id",
-        ] {
-            assert_eq!(
-                serde_json::to_value(context.content(command.into(), vec![]).unwrap()).unwrap(),
-                json!([{ "type": "text", "text": command }])
-            );
-        }
-        assert!(context.content(" ".into(), vec![]).is_err());
-        assert!(context
-            .content(
-                "Read".into(),
-                vec![PromptFile {
-                    uri: "https://example.invalid/README.md".into(),
-                    name: "README.md".into(),
-                }]
-            )
-            .is_err());
-    }
-
-    #[test]
-    fn only_the_exact_host_context_is_removed_from_user_history() {
-        let context = WorkspaceContext::new(Path::new("/fixture/project")).unwrap();
-        let update = |role: &str, text: &str| {
-            json!({
-                "sessionUpdate": role, "messageId": "message-1",
-                "content": { "type": "text", "text": text },
-            })
-        };
-        assert!(context
-            .present_update(update("user_message_chunk", &context.text))
-            .is_none());
-        for separator in ["", "\n", "\n\n"] {
-            let joined = format!("Explain this project{separator}{}", context.text);
-            assert_eq!(
-                context
-                    .present_update(update("user_message_chunk", &joined))
-                    .unwrap(),
-                update("user_message_chunk", "Explain this project")
-            );
-        }
-        let other = WorkspaceContext::new(Path::new("/fixture/another-project")).unwrap();
-        for (role, text) in [
-            ("agent_message_chunk", context.text.as_str()),
-            ("agent_thought_chunk", context.text.as_str()),
-            ("user_message_chunk", other.text.as_str()),
-            (
-                "user_message_chunk",
-                "User-authored <lithe_workspace_context> example",
-            ),
-        ] {
-            let original = update(role, text);
-            assert_eq!(context.present_update(original.clone()), Some(original));
-        }
-    }
-
-    #[test]
-    fn generated_titles_hide_full_and_truncated_context_without_changing_other_titles() {
-        let context = WorkspaceContext::new(Path::new("/fixture/project")).unwrap();
-        for suffix in [
-            context.text.clone(),
-            context.text.chars().take(300).collect(),
-            context
-                .text
-                .split_whitespace()
-                .collect::<Vec<_>>()
-                .join(" ")
-                .chars()
-                .take(300)
-                .collect(),
-        ] {
-            let title = format!("Explain this project\n\n{suffix}");
-            assert_eq!(
-                context.present_title(&title).as_deref(),
-                Some("Explain this project")
-            );
-            assert_eq!(context.present_title(&suffix), None);
-            let update = json!({ "sessionUpdate": "session_info_update", "title": title, "_meta": { "preserved": true } });
-            assert_eq!(
-                context.present_update(update).unwrap(),
-                json!({
-                    "sessionUpdate": "session_info_update", "title": "Explain this project", "_meta": { "preserved": true }
-                })
-            );
-        }
-        for title in [
-            "User title",
-            "User <lithe_workspace_context> example",
-            "<lithe_workspace_context> custom explanation",
-        ] {
-            assert_eq!(context.present_title(title).as_deref(), Some(title));
-        }
-        for title in ["", " \n\t "] {
-            assert_eq!(context.present_title(title), None);
-        }
-    }
-}
diff --git a/rust/lithe-agent-host/tests/claude_api_failure.rs b/rust/lithe-agent-host/tests/claude_api_failure.rs
deleted file mode 100644
index 8420609c..00000000
--- a/rust/lithe-agent-host/tests/claude_api_failure.rs
+++ /dev/null
@@ -1,651 +0,0 @@
-//! Opt-in local HTTP checks against the installed Claude ACP adapter and CLI.
-//!
-//! No provider credentials or external API are used. Set `LITHE_ACP_E2E_DATA_DIR`
-//! to the existing adapter installation and `CLAUDE_CONFIG_DIR` to an isolated
-//! temporary directory, then run this target with `--ignored`.
-
-use std::io::{Read, Write};
-use std::net::{TcpListener, TcpStream};
-use std::path::PathBuf;
-use std::sync::{mpsc, Arc};
-use std::time::{Duration, Instant};
-
-use lithe_agent_host::{
-    AgentAuthentication, AgentCommand, AgentEvent, AgentHandle, AgentLaunch, ProviderCredentials,
-    ProviderProtocol,
-};
-
-const DEADLINE: Duration = Duration::from_secs(30);
-const MAX_REQUEST_BYTES: usize = 1024 * 1024;
-const RECOVER_AFTER_FAILURE: u16 = 202;
-const MODEL_RESTORE_PROMPT: &str = "LITHE_MODEL_RESTORE: Only reply OK. No tools.";
-
-struct Project(PathBuf);
-
-impl Drop for Project {
-    fn drop(&mut self) {
-        std::fs::remove_dir_all(&self.0).expect("remove isolated test project");
-    }
-}
-
-/// Consume the entire request before closing the connection, avoiding a TCP
-/// reset from unread request bytes. Every read shares the same local deadline.
-fn respond(stream: &mut TcpStream, status: u16, models: Option<&mut Vec<String>>) -> bool {
-    let deadline = Instant::now() + Duration::from_secs(2);
-    let mut request = Vec::new();
-    let (headers, content_length, header_length) = loop {
-        assert!(request.len() < MAX_REQUEST_BYTES, "bounded HTTP request");
-        let remaining = deadline.saturating_duration_since(Instant::now());
-        assert!(!remaining.is_zero(), "HTTP request before local deadline");
-        stream.set_read_timeout(Some(remaining)).unwrap();
-        let mut buffer = [0; 8192];
-        let count = match stream.read(&mut buffer) {
-            Ok(0) if request.is_empty() => return false,
-            Err(error)
-                if request.is_empty()
-                    && matches!(
-                        error.kind(),
-                        std::io::ErrorKind::WouldBlock | std::io::ErrorKind::TimedOut
-                    ) =>
-            {
-                return false
-            }
-            result => result.expect("read local HTTP request"),
-        };
-        assert!(count > 0, "complete HTTP request headers");
-        request.extend_from_slice(&buffer[..count]);
-        if let Some(end) = request.windows(4).position(|bytes| bytes == b"\r\n\r\n") {
-            let headers = String::from_utf8(request[..end].to_vec()).unwrap();
-            let length = headers
-                .lines()
-                .find_map(|line| {
-                    let (name, value) = line.split_once(':')?;
-                    name.eq_ignore_ascii_case("content-length")
-                        .then(|| value.trim().parse::<usize>().unwrap())
-                })
-                .unwrap_or(0);
-            assert!(length < MAX_REQUEST_BYTES, "bounded HTTP body");
-            break (headers, length, end + 4);
-        }
-    };
-    while request.len() < header_length + content_length {
-        let remaining = deadline.saturating_duration_since(Instant::now());
-        assert!(!remaining.is_zero(), "HTTP body before local deadline");
-        stream.set_read_timeout(Some(remaining)).unwrap();
-        let mut buffer = [0; 8192];
-        let count = stream.read(&mut buffer).expect("read local HTTP body");
-        assert!(count > 0, "complete HTTP request body");
-        request.extend_from_slice(&buffer[..count]);
-    }
-    let path = headers
-        .lines()
-        .next()
-        .unwrap()
-        .split_whitespace()
-        .nth(1)
-        .unwrap();
-    let is_message = path.split('?').next() == Some("/v1/messages");
-    // Claude Code asks for a session title on its own, while the first prompt is
-    // read (adapter 0.95 and later; 0.81 asked after the turn instead). It is a
-    // side request, not part of the retry budget these tests pin: always answer
-    // it successfully and leave it out of the request count.
-    let is_title = is_message
-        && String::from_utf8_lossy(&request[header_length..header_length + content_length])
-            .contains("You are naming a coding session");
-    let status = if is_title { 201 } else { status };
-    let model = if is_message && models.is_some() {
-        let body: serde_json::Value =
-            serde_json::from_slice(&request[header_length..header_length + content_length])
-                .expect("native Messages request JSON");
-        let model = body["model"]
-            .as_str()
-            .expect("native request model")
-            .to_owned();
-        // Native setModel validation and automatic title generation may also
-        // call Messages. Record only the explicitly submitted workflow prompt.
-        let is_prompt = body["messages"].as_array().is_some_and(|messages| {
-            messages.iter().any(|message| {
-                message["role"] == "user"
-                    && (message["content"] == MODEL_RESTORE_PROMPT
-                        || message["content"].as_array().is_some_and(|blocks| {
-                            blocks
-                                .iter()
-                                .any(|block| block["text"] == MODEL_RESTORE_PROMPT)
-                        }))
-            })
-        });
-        if is_prompt {
-            models.unwrap().push(model.clone());
-        }
-        model
-    } else {
-        "claude-sonnet-4-6".to_owned()
-    };
-    if is_message && status == 0 {
-        // Closing after consuming the request is a deterministic transport
-        // failure: no response arrives, rather than a response-header timeout.
-        return true;
-    }
-    let (status, content_type, body) = if is_message && matches!(status, 200 | 201) {
-        let text = if status == 200 { "PARTIAL" } else { "LOCAL_OK" };
-        let mut frames = vec![
-            (
-                "message_start",
-                serde_json::json!({"type": "message_start", "message": {
-                    "id": "msg_local", "type": "message", "role": "assistant", "model": model, "content": [],
-                    "stop_reason": null, "stop_sequence": null, "usage": {"input_tokens": 1, "output_tokens": 0}
-                }}),
-            ),
-            (
-                "content_block_start",
-                serde_json::json!({"type": "content_block_start", "index": 0, "content_block": {"type": "text", "text": ""}}),
-            ),
-            (
-                "content_block_delta",
-                serde_json::json!({"type": "content_block_delta", "index": 0, "delta": {"type": "text_delta", "text": text}}),
-            ),
-        ];
-        if status == 200 {
-            frames.push(("error", serde_json::json!({"type": "error", "error": {"type": "api_error", "message": "stream interrupted"}})));
-        } else {
-            frames.extend([
-                ("content_block_stop", serde_json::json!({"type": "content_block_stop", "index": 0})),
-                ("message_delta", serde_json::json!({"type": "message_delta", "delta": {"stop_reason": "end_turn", "stop_sequence": null}, "usage": {"output_tokens": 1}})),
-                ("message_stop", serde_json::json!({"type": "message_stop"})),
-            ]);
-        }
-        (
-            200,
-            "text/event-stream",
-            frames
-                .into_iter()
-                .map(|(event, data)| format!("event: {event}\ndata: {data}\n\n"))
-                .collect::<String>(),
-        )
-    } else if is_message {
-        assert!(headers
-            .lines()
-            .any(|line| line.to_ascii_lowercase() == "x-api-key: invalid-test-key"));
-        let error_type = match status {
-            400 => "invalid_request_error",
-            401 => "authentication_error",
-            402 => "billing_error",
-            403 => "permission_error",
-            404 => "not_found_error",
-            429 => "rate_limit_error",
-            504 => "timeout_error",
-            529 => "overloaded_error",
-            _ => "api_error",
-        };
-        let message = if status == 401 {
-            "Invalid API key"
-        } else {
-            "No available channel for model test-model"
-        };
-        (
-            status,
-            "application/json",
-            serde_json::json!({"type": "error", "error": {"type": error_type, "message": message}})
-                .to_string(),
-        )
-    } else {
-        (200, "application/json", "{\"input_tokens\":1}".into())
-    };
-    stream
-        .set_write_timeout(Some(Duration::from_secs(2)))
-        .unwrap();
-    // Even a provider explicitly requesting a three-minute retry must not
-    // extend Lithe's bounded recovery after native API retries are disabled.
-    write!(stream, "HTTP/1.1 {status} Test\r\nContent-Type: {content_type}\r\nContent-Length: {}\r\nRetry-After: 180\r\nx-should-retry: true\r\nConnection: close\r\n\r\n{body}", body.len()).unwrap();
-    is_message && !is_title
-}
-
-fn run_local_api_turn(status: u16) {
-    run_local_api_turn_with(status, false);
-}
-
-fn run_local_api_turn_with(status: u16, observe_model_calls: bool) {
-    assert!(
-        std::env::var_os("CLAUDE_CONFIG_DIR").is_some(),
-        "isolate native CLI state before running this opt-in test"
-    );
-    let data_directory = PathBuf::from(
-        std::env::var_os("LITHE_ACP_E2E_DATA_DIR").expect("existing adapter data directory"),
-    );
-    let project = Project(
-        std::env::temp_dir().join(format!("lithe-claude-failure-{}", uuid::Uuid::new_v4())),
-    );
-    std::fs::create_dir_all(project.0.join(".claude")).unwrap();
-    // The session's public options must override conflicting project settings.
-    std::fs::write(
-        project.0.join(".claude/settings.json"),
-        r#"{"env":{"CLAUDE_CODE_MAX_RETRIES":"10","CLAUDE_CODE_RETRY_WATCHDOG":"1","CLAUDE_CODE_DISABLE_NONSTREAMING_FALLBACK":"0"}}"#,
-    )
-    .unwrap();
-    let listener = TcpListener::bind("127.0.0.1:0").unwrap();
-    listener.set_nonblocking(true).unwrap();
-    let (sender, events) = mpsc::channel();
-    let handle = AgentHandle::open(
-        AgentLaunch {
-            agent_id: Some("claude-acp".into()),
-            command: None,
-            args: vec![],
-            cwd: project.0.clone(),
-            data_directory: Some(data_directory),
-            authentication: AgentAuthentication::ApiKey,
-            observe_model_calls,
-            observe_subagents: false,
-            process_scope: None,
-            claude_config_dir: None,
-            context_limits: Default::default(),
-            codex_home: None,
-            provider: Some(ProviderCredentials {
-                protocol: ProviderProtocol::AnthropicMessages,
-                base_url: format!("http://{}", listener.local_addr().unwrap()),
-                api_key: "invalid-test-key".into(),
-                name: Some("Local failure fixture".into()),
-                model: Some("claude-sonnet-4-6".into()),
-                allow_insecure_http: true,
-            }),
-        },
-        Arc::new(move |event| {
-            let _ = sender.send(event);
-        }),
-    )
-    .unwrap();
-    let mut session_id = None;
-    let mut requests = 0;
-    let mut reply = String::new();
-    let mut attempts = Vec::new();
-    let mut model_calls = Vec::new();
-    let deadline = Instant::now() + DEADLINE;
-    loop {
-        // Native TCP acceptance and the host's event channel have no shared
-        // wait primitive. Poll only these observable boundaries, bounded by
-        // one deadline; no sleep or private CLI state controls the test.
-        loop {
-            match listener.accept() {
-                Ok((mut stream, _)) => {
-                    let response_status = if status == RECOVER_AFTER_FAILURE {
-                        if requests == 0 {
-                            503
-                        } else {
-                            201
-                        }
-                    } else {
-                        status
-                    };
-                    requests += usize::from(respond(&mut stream, response_status, None));
-                }
-                Err(error) if error.kind() == std::io::ErrorKind::WouldBlock => break,
-                Err(error) => panic!("accept local HTTP request: {error}"),
-            }
-        }
-        assert!(
-            Instant::now() < deadline,
-            "Claude must report {status} without minutes of backoff"
-        );
-        let event = match events.recv_timeout(Duration::from_millis(10)) {
-            Ok(event) => event,
-            Err(mpsc::RecvTimeoutError::Timeout) => continue,
-            Err(error) => panic!("host event channel closed: {error}"),
-        };
-        match event {
-            AgentEvent::Ready { .. } => handle
-                .send(AgentCommand::NewSession {
-                    token: "new".into(),
-                })
-                .unwrap(),
-            AgentEvent::SessionCreated { session_id: id, .. } => {
-                session_id = Some(id.clone());
-                handle
-                    .send(AgentCommand::Prompt {
-                        session_id: id,
-                        text: "Only reply OK, without tools.".into(),
-                        files: vec![],
-                    })
-                    .unwrap();
-            }
-            AgentEvent::RequestFailed {
-                session_id: id,
-                message,
-                ..
-            } => {
-                eprintln!("local status {status}, requests {requests}, failure {message}");
-                assert!(
-                    !matches!(status, 201 | RECOVER_AFTER_FAILURE),
-                    "successful streaming turn: {message}"
-                );
-                assert_eq!(id, session_id);
-                match status {
-                    0 => assert!(
-                        message.to_ascii_lowercase().contains("connection")
-                            || message.contains("server_error"),
-                        "expected transport failure: {message}"
-                    ),
-                    200 => assert!(
-                        message.contains("stream interrupted"),
-                        "expected streaming failure: {message}"
-                    ),
-                    // The adapter translates 404 into an actionable typed model
-                    // error; the HTTP number is intentionally absent from it.
-                    404 => assert!(
-                        message.contains("selected model"),
-                        "expected model failure: {message}"
-                    ),
-                    // Adapter 0.95 reports rejected credentials as one typed
-                    // authentication error instead of echoing the HTTP number.
-                    401 | 403 => assert!(
-                        message.contains("Authentication required"),
-                        "expected authentication failure: {message}"
-                    ),
-                    _ => assert!(
-                        message.contains(&status.to_string()),
-                        "expected {status}: {message}"
-                    ),
-                }
-                let expected = match status {
-                    0 | 408 | 429 | 500 | 502 | 503 | 504 | 529 => 5,
-                    // The native model resolver probes twice even with API
-                    // retries and non-streaming fallback both disabled.
-                    404 => 2,
-                    _ => 1,
-                };
-                if expected == 5 {
-                    // An adapter attempt can fail before making a fresh HTTP
-                    // request. Assert the wire budget and all five Host attempts
-                    // independently, so hidden native duplicate calls still fail.
-                    assert!(
-                        (1..=5).contains(&requests),
-                        "at most five HTTP requests, got {requests}"
-                    );
-                    assert_eq!(attempts, vec![2, 3, 4, 5]);
-                } else {
-                    assert_eq!(requests, expected, "permanent failure has no Host replay");
-                    assert!(attempts.is_empty(), "permanent errors do not reconnect");
-                }
-                break;
-            }
-            AgentEvent::TurnRetrying {
-                attempt,
-                max_attempts,
-                ..
-            } => {
-                eprintln!("local status {status}, retry attempt {attempt}/{max_attempts:?}");
-                assert_eq!(max_attempts, Some(5));
-                attempts.push(attempt);
-            }
-            AgentEvent::Update { update, .. }
-                if update["sessionUpdate"] == "session_info_update"
-                    && update["_meta"]["jetbrains"]["air"]["sessionFailure"].is_object() =>
-            {
-                eprintln!(
-                    "local status {status}, public failure {}",
-                    update["_meta"]["jetbrains"]["air"]["sessionFailure"]
-                );
-            }
-            AgentEvent::Update { update, .. }
-                if update["sessionUpdate"] == "agent_message_chunk" =>
-            {
-                reply.push_str(update["content"]["text"].as_str().unwrap_or_default());
-            }
-            AgentEvent::TurnFinished {
-                session_id: id,
-                stop_reason,
-                ..
-            } => {
-                assert!(
-                    matches!(status, 201 | RECOVER_AFTER_FAILURE),
-                    "API failure must not look like success"
-                );
-                assert_eq!(id, session_id.clone().unwrap());
-                assert_eq!(stop_reason, "end_turn");
-                assert_eq!(reply, "LOCAL_OK");
-                assert_eq!(
-                    requests,
-                    if status == RECOVER_AFTER_FAILURE {
-                        2
-                    } else {
-                        1
-                    }
-                );
-                assert_eq!(
-                    attempts,
-                    if status == RECOVER_AFTER_FAILURE {
-                        vec![2]
-                    } else {
-                        vec![]
-                    }
-                );
-                break;
-            }
-            AgentEvent::ModelCall {
-                session_id: id,
-                after_turn_finished,
-                call,
-                ..
-            } => {
-                assert!(!after_turn_finished, "the turn waits for its own calls");
-                model_calls.push((id, call));
-            }
-            AgentEvent::Stopped { message } => {
-                panic!("agent stopped before API failure: {message:?}")
-            }
-            _ => {}
-        }
-    }
-    if observe_model_calls {
-        // The host settles a turn's observed calls before `turnFinished`, so
-        // they are already present here without draining later events.
-        let (id, call) = model_calls
-            .iter()
-            // The session-title request carries no tools; the turn's own request does.
-            .find(|(_, call)| {
-                call.usage.is_some() && call.context.is_some_and(|context| context.tool_count > 0)
-            })
-            .expect("the proxied message request is observed");
-        assert_eq!(id, &session_id);
-        assert!(call.streaming, "Claude streams through the proxy");
-        assert!(call.first_token_ms.is_some());
-        assert_eq!(call.usage.map(|usage| usage.output_tokens), Some(1));
-        assert!(call.context.is_some_and(|context| context.tool_count > 0));
-    } else {
-        assert!(model_calls.is_empty(), "no observation without the opt-in");
-    }
-    // AgentHandle owns bounded termination of the entire subprocess tree;
-    // dropping it also guarantees cleanup on every assertion-failure path.
-    drop(handle);
-}
-
-/// Exercise the real installed ACP and CLI, but answer Messages requests locally.
-/// Both phases share one isolated transcript store; each owns its process tree.
-fn local_model_phase(
-    listener: &TcpListener,
-    project: &Project,
-    data_directory: &std::path::Path,
-    restore: Option<&str>,
-) -> (String, Vec<String>) {
-    let (sender, events) = mpsc::channel();
-    let handle = AgentHandle::open(
-        AgentLaunch {
-            agent_id: Some("claude-acp".into()),
-            command: None,
-            args: vec![],
-            cwd: project.0.clone(),
-            data_directory: Some(data_directory.to_path_buf()),
-            authentication: AgentAuthentication::ApiKey,
-            observe_model_calls: false,
-            observe_subagents: false,
-            process_scope: None,
-            claude_config_dir: None,
-            context_limits: Default::default(),
-            codex_home: None,
-            provider: Some(ProviderCredentials {
-                protocol: ProviderProtocol::AnthropicMessages,
-                base_url: format!("http://{}", listener.local_addr().unwrap()),
-                api_key: "invalid-test-key".into(),
-                name: Some("Local model fixture".into()),
-                model: Some("sonnet".into()),
-                allow_insecure_http: true,
-            }),
-        },
-        Arc::new(move |event| {
-            let _ = sender.send(event);
-        }),
-    )
-    .unwrap();
-    let deadline = Instant::now() + DEADLINE;
-    let mut session_id = restore.map(str::to_owned);
-    let mut models = Vec::new();
-    let mut reply = String::new();
-    loop {
-        loop {
-            match listener.accept() {
-                Ok((mut stream, _)) => {
-                    respond(&mut stream, 201, Some(&mut models));
-                }
-                Err(error) if error.kind() == std::io::ErrorKind::WouldBlock => break,
-                Err(error) => panic!("accept local model request: {error}"),
-            }
-        }
-        assert!(
-            Instant::now() < deadline,
-            "model phase before local deadline"
-        );
-        let event = match events.recv_timeout(Duration::from_millis(10)) {
-            Ok(event) => event,
-            Err(mpsc::RecvTimeoutError::Timeout) => continue,
-            Err(error) => panic!("model event channel closed: {error}"),
-        };
-        match event {
-            AgentEvent::Ready { .. } => handle
-                .send(match restore {
-                    Some(id) => AgentCommand::LoadSession {
-                        token: "load".into(),
-                        session_id: id.into(),
-                    },
-                    None => AgentCommand::NewSession {
-                        token: "new".into(),
-                    },
-                })
-                .unwrap(),
-            AgentEvent::SessionCreated { session_id: id, .. } => {
-                session_id = Some(id.clone());
-                // Public native alias: the adapter owns its canonical model ID.
-                handle
-                    .send(AgentCommand::SetConfigOption {
-                        token: "model".into(),
-                        session_id: id,
-                        config_id: "model".into(),
-                        value: "opus".into(),
-                    })
-                    .unwrap();
-            }
-            AgentEvent::SessionConfigured { session_id: id, .. }
-            | AgentEvent::SessionLoaded { session_id: id, .. } => {
-                assert_eq!(Some(&id), session_id.as_ref());
-                reply.clear(); // Replayed history is not this phase's new reply.
-                handle
-                    .send(AgentCommand::Prompt {
-                        session_id: id,
-                        text: MODEL_RESTORE_PROMPT.into(),
-                        files: vec![],
-                    })
-                    .unwrap();
-            }
-            AgentEvent::Update { update, .. }
-                if update["sessionUpdate"] == "agent_message_chunk" =>
-            {
-                reply.push_str(update["content"]["text"].as_str().unwrap_or_default());
-            }
-            AgentEvent::TurnFinished { stop_reason, .. } => {
-                assert_eq!(stop_reason, "end_turn");
-                assert_eq!(reply, "LOCAL_OK");
-                assert_eq!(models.len(), 1, "one native prompt request per phase");
-                break;
-            }
-            AgentEvent::RequestFailed { message, .. } => panic!("model workflow failed: {message}"),
-            AgentEvent::Stopped { message } => panic!("model workflow stopped: {message:?}"),
-            _ => {}
-        }
-    }
-    // Drop/close owns bounded process-tree termination on success and panic.
-    handle.close();
-    (session_id.unwrap(), models)
-}
-
-#[test]
-#[ignore = "requires an installed Claude ACP/CLI and an isolated CLAUDE_CONFIG_DIR; uses only local HTTP"]
-fn claude_restore_uses_the_last_selected_model_in_the_actual_request() {
-    assert!(
-        std::env::var_os("CLAUDE_CONFIG_DIR").is_some(),
-        "isolate native CLI state"
-    );
-    let data_directory = PathBuf::from(
-        std::env::var_os("LITHE_ACP_E2E_DATA_DIR").expect("installed adapter directory"),
-    );
-    let project =
-        Project(std::env::temp_dir().join(format!("lithe-claude-model-{}", uuid::Uuid::new_v4())));
-    std::fs::create_dir_all(&project.0).unwrap();
-    let listener = TcpListener::bind("127.0.0.1:0").unwrap();
-    listener.set_nonblocking(true).unwrap();
-    let (id, original) = local_model_phase(&listener, &project, &data_directory, None);
-    let (_, restored) = local_model_phase(&listener, &project, &data_directory, Some(&id));
-    eprintln!("selected request models: {original:?}; restored request models: {restored:?}");
-    assert!(
-        original[0].contains("opus"),
-        "explicitly selected native Opus model"
-    );
-    assert_eq!(
-        restored, original,
-        "restarted ACP must preserve the selected model on the wire"
-    );
-}
-
-#[test]
-#[ignore = "requires an installed Claude ACP/CLI and an isolated CLAUDE_CONFIG_DIR; uses only local HTTP"]
-fn claude_turn_through_the_model_call_proxy_is_observed() {
-    run_local_api_turn_with(201, true);
-}
-
-#[test]
-#[ignore = "requires an installed Claude ACP/CLI and an isolated CLAUDE_CONFIG_DIR; uses only local HTTP"]
-fn claude_invalid_key_fails_after_one_request() {
-    run_local_api_turn(401);
-}
-
-#[test]
-#[ignore = "requires an installed Claude ACP/CLI and an isolated CLAUDE_CONFIG_DIR; uses only local HTTP"]
-fn claude_unavailable_channel_uses_five_short_attempts() {
-    run_local_api_turn(503);
-}
-
-macro_rules! api_failure_test {
-    ($name:ident, $status:expr) => {
-        #[test]
-        #[ignore = "requires an installed Claude ACP/CLI and an isolated CLAUDE_CONFIG_DIR; uses only local HTTP"]
-        fn $name() {
-            run_local_api_turn($status);
-        }
-    };
-}
-
-api_failure_test!(claude_invalid_request_fails_after_one_request, 400);
-api_failure_test!(claude_billing_error_fails_after_one_request, 402);
-api_failure_test!(claude_permission_error_fails_after_one_request, 403);
-api_failure_test!(claude_missing_model_fails_without_reconnecting, 404);
-api_failure_test!(claude_request_timeout_uses_five_short_attempts, 408);
-api_failure_test!(claude_rate_limit_uses_five_short_attempts, 429);
-api_failure_test!(claude_server_error_uses_five_short_attempts, 500);
-api_failure_test!(claude_bad_gateway_uses_five_short_attempts, 502);
-api_failure_test!(claude_gateway_timeout_uses_five_short_attempts, 504);
-api_failure_test!(claude_overload_uses_five_short_attempts, 529);
-api_failure_test!(claude_closed_connection_uses_five_short_attempts, 0);
-
-api_failure_test!(claude_stream_error_does_not_resend_without_streaming, 200);
-api_failure_test!(claude_successful_stream_still_completes, 201);
-
-api_failure_test!(
-    claude_recovers_after_one_failed_attempt,
-    RECOVER_AFTER_FAILURE
-);
diff --git a/rust/lithe-agent-host/tests/codex_api_failure.rs b/rust/lithe-agent-host/tests/codex_api_failure.rs
deleted file mode 100644
index 0f5a5a18..00000000
--- a/rust/lithe-agent-host/tests/codex_api_failure.rs
+++ /dev/null
@@ -1,525 +0,0 @@
-//! Opt-in local Responses checks against the installed Codex ACP adapter/CLI.
-//! Requires LITHE_ACP_E2E_DATA_DIR and an isolated CODEX_HOME. No real key or
-//! external provider is used; the owning handle cleans the entire process tree.
-
-use lithe_agent_host::{
-    AgentAuthentication, AgentCommand, AgentEvent, AgentHandle, AgentLaunch, ProviderCredentials,
-    ProviderProtocol,
-};
-use std::{
-    io::{Read, Write},
-    net::{TcpListener, TcpStream},
-    path::PathBuf,
-    sync::{mpsc, Arc},
-    time::{Duration, Instant},
-};
-
-struct Project(PathBuf);
-impl Drop for Project {
-    fn drop(&mut self) {
-        std::fs::remove_dir_all(&self.0).expect("remove isolated Codex workspace");
-    }
-}
-
-fn respond(stream: &mut TcpStream, status: u16, long: bool, partial: bool) -> bool {
-    let deadline = Instant::now() + Duration::from_secs(2);
-    let mut request = Vec::new();
-    let (headers, length, offset) = loop {
-        assert!(request.len() < 1024 * 1024, "bounded local request");
-        let remaining = deadline.saturating_duration_since(Instant::now());
-        assert!(!remaining.is_zero(), "HTTP request within local deadline");
-        stream.set_read_timeout(Some(remaining)).unwrap();
-        let mut bytes = [0; 8192];
-        let count = match stream.read(&mut bytes) {
-            Ok(0) if request.is_empty() => return false,
-            Err(error)
-                if request.is_empty()
-                    && matches!(
-                        error.kind(),
-                        std::io::ErrorKind::WouldBlock | std::io::ErrorKind::TimedOut
-                    ) =>
-            {
-                return false
-            }
-            other => other.expect("read local request"),
-        };
-        assert!(count > 0, "complete request");
-        request.extend_from_slice(&bytes[..count]);
-        if let Some(end) = request.windows(4).position(|part| part == b"\r\n\r\n") {
-            let headers = String::from_utf8(request[..end].to_vec()).unwrap();
-            let length = headers
-                .lines()
-                .find_map(|line| {
-                    let (name, value) = line.split_once(':')?;
-                    name.eq_ignore_ascii_case("content-length")
-                        .then(|| value.trim().parse::<usize>().unwrap())
-                })
-                .unwrap_or(0);
-            assert!(length < 1024 * 1024, "bounded request body");
-            break (headers, length, end + 4);
-        }
-    };
-    while request.len() < offset + length {
-        let remaining = deadline.saturating_duration_since(Instant::now());
-        assert!(!remaining.is_zero(), "HTTP body within local deadline");
-        stream.set_read_timeout(Some(remaining)).unwrap();
-        let mut bytes = [0; 8192];
-        let count = stream.read(&mut bytes).unwrap();
-        assert!(count > 0, "complete request body");
-        request.extend_from_slice(&bytes[..count]);
-    }
-    let responses = headers
-        .lines()
-        .next()
-        .unwrap()
-        .split_whitespace()
-        .nth(1)
-        .unwrap()
-        .split('?')
-        .next()
-        == Some("/v1/responses");
-    if responses && status == 0 {
-        return true;
-    }
-    let (status, content_type, body) = if responses && status == 200 {
-        let text = if partial {
-            "PARTIAL"
-        } else {
-            "LOCAL_OK 中文🙂"
-        };
-        let item = serde_json::json!({"id": "msg_local", "type": "message", "role": "assistant", "status": "completed", "content": [{"type": "output_text", "text": text, "annotations": []}]});
-        let mut frames = vec![
-            serde_json::json!({"type": "response.created", "response": {"id": "resp_local", "status": "in_progress", "output": []}}),
-            serde_json::json!({"type": "response.output_item.added", "output_index": 0, "item": {"id": "msg_local", "type": "message", "role": "assistant", "status": "in_progress", "content": []}}),
-            serde_json::json!({"type": "response.content_part.added", "item_id": "msg_local", "output_index": 0, "content_index": 0, "part": {"type": "output_text", "text": "", "annotations": []}}),
-            serde_json::json!({"type": "response.output_text.delta", "item_id": "msg_local", "output_index": 0, "content_index": 0, "delta": text}),
-        ];
-        if !partial {
-            frames.extend([
-                serde_json::json!({"type": "response.output_item.done", "output_index": 0, "item": item}),
-                serde_json::json!({"type": "response.completed", "response": {"id": "resp_local", "status": "completed", "output": [item], "usage": {"input_tokens": 1, "output_tokens": 1, "total_tokens": 2}}}),
-            ]);
-        }
-        (
-            200,
-            "text/event-stream",
-            frames
-                .into_iter()
-                .map(|frame| format!("data: {frame}\n\n"))
-                .collect::<String>(),
-        )
-    } else if responses {
-        assert!(headers
-            .lines()
-            .any(|line| line.eq_ignore_ascii_case("authorization: Bearer invalid-test-key")));
-        (status, "application/json", serde_json::json!({"error": {"type": if status == 429 {"rate_limit_error"} else {"api_error"}, "code": if status == 429 {"rate_limit_exceeded"} else {"fixture_error"}, "message": "Local fixture failure"}}).to_string())
-    } else {
-        (200, "application/json", "{\"data\":[]}".into())
-    };
-    stream
-        .set_write_timeout(Some(Duration::from_secs(2)))
-        .unwrap();
-    let advice = if long { "Retry-After: 180\r\n" } else { "" };
-    write!(stream, "HTTP/1.1 {status} Fixture\r\nContent-Type: {content_type}\r\nContent-Length: {}\r\n{advice}Connection: close\r\n\r\n{body}", body.len()).unwrap();
-    responses
-}
-
-fn run(status: u16, long: bool, recover: bool, partial: bool, cancel: bool, mixed: bool) {
-    run_with(status, long, recover, partial, cancel, mixed, false, false);
-}
-
-fn run_with(
-    status: u16,
-    long: bool,
-    recover: bool,
-    partial: bool,
-    cancel: bool,
-    mixed: bool,
-    observe_model_calls: bool,
-    restore_history: bool,
-) {
-    assert!(
-        std::env::var_os("CODEX_HOME").is_some(),
-        "isolate native Codex state"
-    );
-    let project =
-        Project(std::env::temp_dir().join(format!("lithe-codex-fixture-{}", uuid::Uuid::new_v4())));
-    std::fs::create_dir(&project.0).unwrap();
-    let listener = TcpListener::bind("127.0.0.1:0").unwrap();
-    listener.set_nonblocking(true).unwrap();
-    let (sender, events) = mpsc::channel();
-    let launch = AgentLaunch {
-        agent_id: Some("codex-acp".into()),
-        command: None,
-        args: vec![],
-        cwd: project.0.clone(),
-        data_directory: Some(PathBuf::from(
-            std::env::var_os("LITHE_ACP_E2E_DATA_DIR").expect("existing adapter installation"),
-        )),
-        authentication: AgentAuthentication::ApiKey,
-        observe_model_calls,
-        observe_subagents: false,
-        process_scope: None,
-        claude_config_dir: None,
-        context_limits: Default::default(),
-        codex_home: None,
-        provider: Some(ProviderCredentials {
-            protocol: ProviderProtocol::Responses,
-            base_url: format!("http://{}/v1", listener.local_addr().unwrap()),
-            api_key: "invalid-test-key".into(),
-            name: Some("Local fixture".into()),
-            model: Some("gpt-5.5".into()),
-            allow_insecure_http: true,
-        }),
-    };
-    let handle = AgentHandle::open(
-        launch.clone(),
-        Arc::new(move |event| {
-            let _ = sender.send(event);
-        }),
-    )
-    .unwrap();
-    let start = Instant::now();
-    let deadline = start + Duration::from_secs(32);
-    let mut requests = 0;
-    let mut attempts = Vec::new();
-    let mut reply = String::new();
-    let mut session = None;
-    let mut model_calls = Vec::new();
-    let success = (status == 200 && !partial) || recover || cancel;
-    loop {
-        // HTTP acceptance and host events expose separate native wait objects.
-        // Poll those boundaries only, under the same monotonic local deadline.
-        loop {
-            match listener.accept() {
-                Ok((mut stream, _)) => {
-                    let response = if mixed && requests > 0 {
-                        503
-                    } else if recover && requests > 0 {
-                        200
-                    } else if partial && requests > 0 {
-                        503
-                    } else {
-                        status
-                    };
-                    requests += usize::from(respond(
-                        &mut stream,
-                        response,
-                        long,
-                        partial && requests == 0,
-                    ));
-                }
-                Err(error) if error.kind() == std::io::ErrorKind::WouldBlock => break,
-                Err(error) => panic!("accept fixture request: {error}"),
-            }
-        }
-        assert!(
-            Instant::now() < deadline,
-            "Codex failure within 32 seconds, {requests} requests, attempts {attempts:?}"
-        );
-        let event = match events.recv_timeout(Duration::from_millis(10)) {
-            Ok(event) => event,
-            Err(mpsc::RecvTimeoutError::Timeout) => continue,
-            Err(error) => panic!("host event channel closed: {error}"),
-        };
-        match event {
-            AgentEvent::Ready { .. } => handle
-                .send(AgentCommand::NewSession {
-                    token: "new".into(),
-                })
-                .unwrap(),
-            AgentEvent::SessionCreated { session_id, .. } => {
-                session = Some(session_id.clone());
-                handle
-                    .send(AgentCommand::Prompt {
-                        session_id,
-                        text: "Only reply OK, without tools.".into(),
-                        files: vec![],
-                    })
-                    .unwrap();
-            }
-            AgentEvent::TurnRetrying {
-                attempt,
-                max_attempts,
-                ..
-            } => {
-                assert_eq!(max_attempts, if reply.is_empty() { Some(5) } else { None });
-                attempts.push(attempt);
-                if cancel {
-                    handle
-                        .send(AgentCommand::Cancel {
-                            session_id: session.clone().unwrap(),
-                        })
-                        .unwrap();
-                }
-            }
-            AgentEvent::Update { update, .. }
-                if update["sessionUpdate"] == "agent_message_chunk" =>
-            {
-                reply.push_str(update["content"]["text"].as_str().unwrap_or_default())
-            }
-            AgentEvent::RequestFailed { message, .. } => {
-                eprintln!("fixture status {status}, {requests} requests, attempts {attempts:?}, {} ms: {message}", start.elapsed().as_millis());
-                assert!(!success, "expected successful/cancelled turn: {message}");
-                assert!(
-                    !message.contains("litheCodexFailure"),
-                    "internal envelope is never shown"
-                );
-                if long && status >= 500 {
-                    assert_eq!(requests, 1);
-                    assert_eq!(attempts, [2]);
-                    assert!(message.contains("20 seconds"));
-                } else if status == 0 || partial || matches!(status, 408 | 409 | 429 | 500..=599) {
-                    assert_eq!(requests, 5, "no hidden inner HTTP retries");
-                    assert_eq!(attempts, [2, 3, 4, 5]);
-                    if partial {
-                        assert!(reply.contains("PARTIAL"));
-                    }
-                } else {
-                    assert_eq!(requests, 1);
-                    assert!(attempts.is_empty());
-                    assert!(
-                        start.elapsed() < Duration::from_secs(10),
-                        "permanent failure skips reconnect budget"
-                    );
-                }
-                break;
-            }
-            AgentEvent::TurnFinished { stop_reason, .. } => {
-                assert!(success, "provider error must not be reported as success");
-                assert_eq!(stop_reason, if cancel { "cancelled" } else { "end_turn" });
-                assert_eq!(requests, if recover { 2 } else { 1 });
-                if !cancel {
-                    assert!(
-                        reply.contains("LOCAL_OK 中文🙂"),
-                        "UTF-8 streaming reply: {reply}"
-                    );
-                }
-                assert_eq!(attempts, if recover || cancel { vec![2] } else { vec![] });
-                break;
-            }
-            AgentEvent::ModelCall {
-                session_id,
-                after_turn_finished,
-                call,
-                ..
-            } => {
-                assert!(!after_turn_finished, "the turn waits for its own calls");
-                model_calls.push((session_id, call));
-            }
-            AgentEvent::Stopped { message } => panic!("Codex stopped unexpectedly: {message:?}"),
-            _ => {}
-        }
-    }
-    if observe_model_calls {
-        // The host settles a turn's observed calls before `turnFinished`, so
-        // they are already present here without draining later events.
-        let (session_id, call) = model_calls
-            .iter()
-            .find(|(_, call)| call.usage.is_some())
-            .expect("the proxied Responses request is observed");
-        assert_eq!(session_id, &session);
-        assert!(call.streaming && call.first_token_ms.is_some());
-        assert_eq!(call.usage.map(|usage| usage.output_tokens), Some(1));
-        assert!(call.context.is_some_and(|context| context.tool_count > 0));
-    } else {
-        assert!(model_calls.is_empty(), "no observation without the opt-in");
-    }
-    drop(handle);
-    if restore_history {
-        // A fresh Host has no local statistics/cache. Only native persisted
-        // counters can restore occupancy; another model request is forbidden.
-        let (sender, events) = mpsc::channel();
-        let handle = AgentHandle::open(
-            launch,
-            Arc::new(move |event| {
-                let _ = sender.send(event);
-            }),
-        )
-        .unwrap();
-        let deadline = Instant::now() + Duration::from_secs(20);
-        let mut usage = None;
-        loop {
-            while let Ok((mut stream, _)) = listener.accept() {
-                assert!(
-                    !respond(&mut stream, 200, false, false),
-                    "history recovery cannot call the model"
-                );
-            }
-            assert!(
-                Instant::now() < deadline,
-                "history recovers within its local deadline"
-            );
-            let event = match events.recv_timeout(Duration::from_millis(10)) {
-                Ok(event) => event,
-                Err(mpsc::RecvTimeoutError::Timeout) => continue,
-                Err(error) => panic!("history connection closed: {error}"),
-            };
-            match event {
-                AgentEvent::Ready { .. } => handle
-                    .send(AgentCommand::LoadSession {
-                        token: "restore".into(),
-                        session_id: session.clone().unwrap(),
-                    })
-                    .unwrap(),
-                AgentEvent::Update { update, .. } if update["sessionUpdate"] == "usage_update" => {
-                    usage = Some(update)
-                }
-                AgentEvent::SessionLoaded { .. } => {
-                    let usage = usage.expect("real usage arrives before history load completion");
-                    assert_eq!(
-                        usage["used"], 2,
-                        "controlled provider's last request, not accumulated billing"
-                    );
-                    assert!(usage["size"].as_u64().is_some_and(|size| size > 0));
-                    assert_eq!(usage["_meta"]["lithe"]["contextUsageSource"], "history");
-                    eprintln!(
-                        "Native history restored: {} / {} context tokens",
-                        usage["used"], usage["size"]
-                    );
-                    break;
-                }
-                AgentEvent::RequestFailed { message, .. } => {
-                    panic!("history restore failed: {message}")
-                }
-                AgentEvent::Stopped { message } => {
-                    panic!("history connection stopped: {message:?}")
-                }
-                _ => {}
-            }
-        }
-        drop(handle);
-    }
-}
-
-#[test]
-#[ignore = "requires installed Codex ACP/CLI and isolated CODEX_HOME; local HTTP only"]
-fn codex_turn_through_the_model_call_proxy_is_observed() {
-    run_with(200, false, false, false, false, false, true, false);
-}
-
-#[test]
-#[ignore = "requires installed Codex ACP/CLI and isolated CODEX_HOME; local HTTP only"]
-fn codex_history_restores_real_context_without_a_model_request() {
-    run_with(200, false, false, false, false, false, false, true);
-}
-
-macro_rules! local_case {
-    ($name:ident, $status:expr, $long:expr, $recover:expr, $partial:expr, $cancel:expr) => {
-        #[test]
-        #[ignore = "requires installed Codex ACP/CLI and isolated CODEX_HOME; local HTTP only"]
-        fn $name() {
-            run($status, $long, $recover, $partial, $cancel, false);
-        }
-    };
-}
-local_case!(
-    codex_invalid_key_ignores_long_retry_after,
-    401,
-    true,
-    false,
-    false,
-    false
-);
-local_case!(
-    codex_bad_request_ignores_long_retry_after,
-    400,
-    true,
-    false,
-    false,
-    false
-);
-local_case!(
-    codex_payment_required_ignores_long_retry_after,
-    402,
-    true,
-    false,
-    false,
-    false
-);
-local_case!(
-    codex_permission_denied_ignores_long_retry_after,
-    403,
-    true,
-    false,
-    false,
-    false
-);
-local_case!(
-    codex_missing_model_ignores_long_retry_after,
-    404,
-    true,
-    false,
-    false,
-    false
-);
-local_case!(
-    codex_rate_limit_has_five_shared_attempts,
-    429,
-    false,
-    false,
-    false,
-    false
-);
-
-#[test]
-#[ignore = "requires installed Codex ACP/CLI and isolated CODEX_HOME; local HTTP only"]
-fn codex_rate_limit_and_native_service_retries_share_five_requests() {
-    run(429, false, false, false, false, true);
-}
-local_case!(
-    codex_service_failure_has_five_native_attempts,
-    503,
-    false,
-    false,
-    false,
-    false
-);
-local_case!(
-    codex_transport_failure_has_five_native_attempts,
-    0,
-    false,
-    false,
-    false,
-    false
-);
-local_case!(
-    codex_long_retry_after_is_cancelled_at_twenty_seconds,
-    503,
-    true,
-    false,
-    false,
-    false
-);
-local_case!(
-    codex_temporary_failure_recovers_within_one_native_turn,
-    503,
-    false,
-    true,
-    false,
-    false
-);
-local_case!(
-    codex_success_keeps_unicode_streaming,
-    200,
-    false,
-    false,
-    false,
-    false
-);
-local_case!(
-    codex_partial_stream_uses_native_recovery_without_prompt_replay,
-    200,
-    false,
-    false,
-    true,
-    false
-);
-local_case!(
-    codex_user_stop_interrupts_native_backoff,
-    503,
-    true,
-    false,
-    false,
-    true
-);
diff --git a/rust/lithe-agent-host/tests/npm-progress.test.mjs b/rust/lithe-agent-host/tests/npm-progress.test.mjs
deleted file mode 100644
index 4ff42d32..00000000
--- a/rust/lithe-agent-host/tests/npm-progress.test.mjs
+++ /dev/null
@@ -1,61 +0,0 @@
-import assert from 'node:assert/strict';
-import { execFile } from 'node:child_process';
-import { readFile } from 'node:fs/promises';
-import http from 'node:http';
-import test from 'node:test';
-
-// Local HTTP only: prove byte accounting does not consume or modify npm's stream.
-test('npm observer counts archive bytes and preserves Node options and response data', { timeout: 5000 }, async (t) => {
-  const archive = Buffer.alloc(256 * 1024, 37);
-  const server = http.createServer((request, response) => {
-    if (request.url === '/redirect.tgz') {
-      response.writeHead(302, { location: '/package.tgz' });
-      response.end('not a package');
-    } else if (request.url === '/package.tgz') {
-      // Deliberately omit Content-Length; progress must not invent a total.
-      response.writeHead(200);
-      response.end(archive);
-    } else response.end('registry metadata');
-  });
-  t.after(() => { server.closeAllConnections(); server.close(); });
-  await new Promise((resolve, reject) => {
-    server.once('error', reject);
-    server.listen(0, '127.0.0.1', resolve);
-  });
-  const source = await readFile(new URL('../src/npm-progress.mjs', import.meta.url), 'utf8');
-  const observer = `data:text/javascript,${encodeURIComponent(source)}`;
-  const port = server.address().port;
-  const script = `
-    const http = require('node:http');
-    async function download(path) {
-      return await new Promise((resolve, reject) => {
-        http.get('http://127.0.0.1:${port}' + path, response => {
-          const body = [];
-          response.on('data', data => body.push(data));
-          response.on('end', () => resolve(Buffer.concat(body)));
-          response.on('error', reject);
-        }).on('error', reject);
-      });
-    }
-    (async () => {
-      await download('/metadata');
-      await download('/redirect.tgz');
-      const bytes = await download('/package.tgz');
-      console.log(JSON.stringify({ length: bytes.length, valid: bytes.every(b => b === 37), options: process.env.NODE_OPTIONS }));
-    })().catch(error => { console.error(error); process.exitCode = 1; });
-  `;
-  const { stdout, stderr } = await new Promise((resolve, reject) => {
-    execFile(process.execPath, ['-e', script], {
-      timeout: 4000, killSignal: 'SIGKILL', maxBuffer: 1024 * 1024,
-      env: { ...process.env, NODE_OPTIONS: `--max-old-space-size=256 --import=${observer}`,
-             LITHE_NPM_ORIGINAL_NODE_OPTIONS: '--max-old-space-size=256' },
-    }, (error, stdout, stderr) => error ? reject(error) : resolve({ stdout, stderr }));
-  });
-  assert.deepEqual(JSON.parse(stdout), { length: archive.length, valid: true, options: '--max-old-space-size=256' });
-  const events = stderr.split('\n').filter(line => line.startsWith('LITHE_NPM_PROGRESS '))
-    .map(line => JSON.parse(line.slice('LITHE_NPM_PROGRESS '.length)));
-  assert.ok(events.some(event => event.stage === 'downloading'));
-  assert.equal(events.at(-1).downloadedBytes, archive.length);
-  assert.equal(events.at(-1).stage, 'installing');
-  assert.ok(events.every(event => !('totalBytes' in event) && !('url' in event)));
-});
diff --git a/rust/lithe-agent-host/tests/real_agent.rs b/rust/lithe-agent-host/tests/real_agent.rs
deleted file mode 100644
index 28bf2a71..00000000
--- a/rust/lithe-agent-host/tests/real_agent.rs
+++ /dev/null
@@ -1,660 +0,0 @@
-//! Opt-in end-to-end check against a real ACP agent and API gateway.
-//!
-//! Ignored by default because it needs an installed agent, network access, and
-//! a real key. Run it explicitly with:
-//!
-//! ```text
-//! LITHE_ACP_E2E_COMMAND=/path/to/codex-acp \
-//! LITHE_ACP_E2E_BASE_URL=https://host/v1 LITHE_ACP_E2E_API_KEY=... \
-//! cargo test -p lithe-agent-host --test real_agent -- --ignored --nocapture
-//! ```
-//!
-//! `LITHE_ACP_E2E_MODEL` optionally selects the provider model and
-//! `LITHE_ACP_E2E_ARGS` holds newline-separated arguments. With
-//! `LITHE_ACP_E2E_DATA_DIR` set instead of a command, the catalog adapter is
-//! installed there with the user's npm (if missing) and launched as a catalog
-//! agent, covering the one-click install path. `LITHE_ACP_E2E_AGENT_ID` selects
-//! the adapter and its provider protocol (defaults to `codex-acp`).
-
-use std::sync::{mpsc, Arc};
-use std::time::{Duration, Instant};
-
-use lithe_agent_host::{
-    install, AgentCommand, AgentEvent, AgentHandle, AgentLaunch, ProviderCredentials,
-    ProviderProtocol,
-};
-
-const TURN_DEADLINE: Duration = Duration::from_secs(180);
-
-struct Session {
-    handle: AgentHandle,
-    events: mpsc::Receiver<AgentEvent>,
-}
-
-impl Session {
-    fn next(&self, deadline: Instant, what: &str) -> AgentEvent {
-        let remaining = deadline.saturating_duration_since(Instant::now());
-        self.events
-            .recv_timeout(remaining)
-            .unwrap_or_else(|_| panic!("timed out waiting for {what}"))
-    }
-
-    /// Wait for the first event accepted by `select`, collecting agent text for
-    /// `session_id` on the way.
-    fn wait<T>(
-        &self,
-        what: &str,
-        session_id: Option<&str>,
-        text: &mut String,
-        mut select: impl FnMut(&AgentEvent) -> Option<T>,
-    ) -> T {
-        let deadline = Instant::now() + TURN_DEADLINE;
-        loop {
-            let event = self.next(deadline, what);
-            if let AgentEvent::Update {
-                session_id: id,
-                update,
-            } = &event
-            {
-                if Some(id.as_str()) == session_id
-                    && update["sessionUpdate"] == "agent_message_chunk"
-                {
-                    text.push_str(update["content"]["text"].as_str().unwrap_or_default());
-                }
-            }
-            if let AgentEvent::Stopped { message } = &event {
-                panic!("agent stopped while waiting for {what}: {message:?}");
-            }
-            if let AgentEvent::RequestFailed { message, .. } = &event {
-                panic!("request failed while waiting for {what}: {message}");
-            }
-            if let Some(value) = select(&event) {
-                return value;
-            }
-        }
-    }
-
-    fn send(&self, command: AgentCommand) {
-        self.handle
-            .send(command)
-            .expect("connection accepts command");
-    }
-
-    fn new_session(&self, token: &str) -> String {
-        self.send(AgentCommand::NewSession {
-            token: token.into(),
-        });
-        self.wait(
-            "session creation",
-            None,
-            &mut String::new(),
-            |event| match event {
-                AgentEvent::SessionCreated {
-                    token: t,
-                    session_id,
-                    ..
-                } if t == token => Some(session_id.clone()),
-                _ => None,
-            },
-        )
-    }
-
-    fn prompt(&self, session_id: &str, text: &str) -> (String, String) {
-        self.send(AgentCommand::Prompt {
-            session_id: session_id.into(),
-            text: text.into(),
-            files: vec![],
-        });
-        let mut reply = String::new();
-        let reason = self.wait(
-            "turn end",
-            Some(session_id),
-            &mut reply,
-            |event| match event {
-                AgentEvent::TurnFinished {
-                    session_id: id,
-                    stop_reason,
-                    ..
-                } if id == session_id => Some(stop_reason.clone()),
-                _ => None,
-            },
-        );
-        (reason, reply)
-    }
-}
-
-fn required(name: &str) -> String {
-    std::env::var(name).unwrap_or_else(|_| panic!("{name} must be set for this ignored test"))
-}
-
-fn open(workspace: &std::path::Path) -> Session {
-    let (sender, events) = mpsc::channel();
-    let data_directory = std::env::var_os("LITHE_ACP_E2E_DATA_DIR").map(std::path::PathBuf::from);
-    let agent_id = std::env::var("LITHE_ACP_E2E_AGENT_ID").unwrap_or_else(|_| "codex-acp".into());
-    let agent = lithe_agent_host::catalog::find(&agent_id).expect("catalog E2E agent");
-    let protocol = if data_directory.is_some() {
-        agent.protocol
-    } else {
-        ProviderProtocol::Responses
-    };
-    if let Some(data) = &data_directory {
-        if install::installed_version(data, agent).is_none() {
-            install::install(data, &agent_id, &|| false).expect("adapter installs with npm");
-        }
-    }
-    let launch = AgentLaunch {
-        agent_id: data_directory.as_ref().map(|_| agent_id),
-        command: std::env::var("LITHE_ACP_E2E_COMMAND").ok(),
-        args: std::env::var("LITHE_ACP_E2E_ARGS")
-            .map(|args| {
-                args.lines()
-                    .filter(|line| !line.is_empty())
-                    .map(String::from)
-                    .collect()
-            })
-            .unwrap_or_default(),
-        cwd: workspace.to_path_buf(),
-        data_directory,
-        authentication: lithe_agent_host::AgentAuthentication::ApiKey,
-        observe_model_calls: false,
-        observe_subagents: false,
-        process_scope: None,
-        claude_config_dir: None,
-        context_limits: Default::default(),
-        codex_home: None,
-        provider: Some(ProviderCredentials {
-            protocol,
-            base_url: required("LITHE_ACP_E2E_BASE_URL"),
-            api_key: required("LITHE_ACP_E2E_API_KEY"),
-            name: Some("Lithe end-to-end test".into()),
-            model: std::env::var("LITHE_ACP_E2E_MODEL").ok(),
-            allow_insecure_http: false,
-        }),
-    };
-    let handle = AgentHandle::open(
-        launch,
-        Arc::new(move |event| {
-            let _ = sender.send(event);
-        }),
-    )
-    .expect("valid launch configuration");
-    let session = Session { handle, events };
-    session.wait("ready", None, &mut String::new(), |event| {
-        matches!(event, AgentEvent::Ready { .. }).then_some(())
-    });
-    session
-}
-
-#[test]
-#[ignore = "requires a real ACP agent, network access, and an API key"]
-fn real_agent_conversation_cancel_history_and_cleanup() {
-    let workspace = TemporaryProject::new();
-    let session = open(&workspace.0);
-
-    let first = session.new_session("first");
-    let (reason, reply) = session.prompt(
-        &first,
-        "Remember the code word LITHE-HERON. Reply with exactly: STORED",
-    );
-    assert_eq!(reason, "end_turn");
-    assert!(reply.contains("STORED"), "unexpected reply {reply:?}");
-
-    // A lost startup cancel must result in bounded connection recovery, never
-    // an immediately accepted second prompt in the same unfinished turn.
-    let second = session.new_session("second");
-    session.send(AgentCommand::Prompt {
-        session_id: second.clone(),
-        text: "Write a numbered list of 40 facts about the ocean. Do not use tools.".into(),
-        files: vec![],
-    });
-    session.send(AgentCommand::Cancel {
-        session_id: second.clone(),
-    });
-    let started = Instant::now();
-    let deadline = Instant::now() + Duration::from_secs(20);
-    loop {
-        match session.next(deadline, "cancellation or recovery") {
-            AgentEvent::TurnFinished {
-                session_id,
-                stop_reason,
-                ..
-            } if session_id == second => {
-                assert!(["cancelled", "end_turn"].contains(&stop_reason.as_str()));
-                break;
-            }
-            AgentEvent::Stopped { message } => {
-                assert!(message.unwrap_or_default().contains("Reconnect"));
-                break;
-            }
-            _ => {}
-        }
-    }
-    assert!(started.elapsed() < Duration::from_secs(20));
-    session.handle.close();
-
-    let resumed = open(&workspace.0);
-    resumed.send(AgentCommand::ListSessions {
-        token: "list".into(),
-    });
-    let listed = resumed.wait(
-        "session list",
-        None,
-        &mut String::new(),
-        |event| match event {
-            AgentEvent::Sessions { sessions, .. } => Some(
-                sessions
-                    .iter()
-                    .map(|s| s.session_id.clone())
-                    .collect::<Vec<_>>(),
-            ),
-            _ => None,
-        },
-    );
-    assert!(
-        listed.contains(&first),
-        "first session missing from {listed:?}"
-    );
-    // A new process resumes the first conversation with its context.
-    resumed.send(AgentCommand::LoadSession {
-        token: "load".into(),
-        session_id: first.clone(),
-    });
-    resumed.wait("session load", None, &mut String::new(), |event| {
-        matches!(event, AgentEvent::SessionLoaded { .. }).then_some(())
-    });
-    let (reason, reply) = resumed.prompt(
-        &first,
-        "What code word did I ask you to remember? Reply with the code word only.",
-    );
-    assert_eq!(reason, "end_turn");
-    assert!(
-        reply.contains("LITHE-HERON"),
-        "context was not restored: {reply:?}"
-    );
-    resumed.handle.close();
-}
-
-struct TemporaryProject(std::path::PathBuf);
-
-impl TemporaryProject {
-    fn new() -> Self {
-        let path =
-            std::env::temp_dir().join(format!("lithe-acp-workflow-{}", uuid::Uuid::new_v4()));
-        std::fs::create_dir(&path).expect("temporary project");
-        Self(path)
-    }
-}
-
-impl Drop for TemporaryProject {
-    fn drop(&mut self) {
-        let _ = std::fs::remove_dir_all(&self.0);
-    }
-}
-
-/// A containing repository deliberately describes a different product. Neither
-/// the user's initial prompt nor steering names the nested application's purpose.
-#[test]
-#[ignore = "requires a real catalog ACP agent, network access, and an API key"]
-fn real_agent_keeps_nested_project_scope_through_steering_and_history_restore() {
-    let repository = TemporaryProject::new();
-    for directory in [
-        ".git/objects",
-        ".git/refs/heads",
-        "services/orchard-users/src/main/java",
-    ] {
-        std::fs::create_dir_all(repository.0.join(directory)).unwrap();
-    }
-    std::fs::write(repository.0.join(".git/HEAD"), "ref: refs/heads/main\n").unwrap();
-    std::fs::write(
-        repository.0.join("README.md"),
-        "# Atlas IDE\nAtlas IDE is a desktop code editor and Git visualizer.\n",
-    )
-    .unwrap();
-    std::fs::write(repository.0.join("AGENTS.md"),
-        "# Atlas IDE repository\nRead the applicable project documentation before explaining code. Do not modify files for explanation tasks.\n").unwrap();
-    let workspace = repository.0.join("services/orchard-users");
-    std::fs::write(workspace.join("README.md"),
-        "# Orchard Users\nOrchard Users is a Spring Boot REST service for managing user accounts. It exposes GET /api/users.\n").unwrap();
-    std::fs::write(workspace.join("pom.xml"),
-        "<project><modelVersion>4.0.0</modelVersion><groupId>example</groupId><artifactId>orchard-users</artifactId><version>1.0</version></project>\n").unwrap();
-    std::fs::write(workspace.join("src/main/java/UserController.java"),
-        "@RestController class UserController { @GetMapping(\"/api/users\") List<String> users() { return List.of(); } }\n").unwrap();
-    let session = open(&workspace);
-    let id = session.new_session("nested-project");
-    session.send(AgentCommand::Prompt {
-        session_id: id.clone(),
-        text: "讲解一下当前项目结构。请先查看项目文件，简短回答，不修改文件。".into(),
-        files: vec![],
-    });
-    let mut reply = String::new();
-    let mut sent_supplement = false;
-    let mut steering_outcome = None;
-    let mut read_project_readme = false;
-    let reason = session.wait(
-        "nested project and steering",
-        Some(&id),
-        &mut reply,
-        |event| {
-            match event {
-                AgentEvent::Permission {
-                    request_id,
-                    request,
-                    ..
-                } => {
-                    let option_id = request["options"]
-                        .as_array()
-                        .and_then(|options| {
-                            options.iter().find(|option| option["kind"] == "allow_once")
-                        })
-                        .and_then(|option| option["optionId"].as_str())
-                        .map(String::from);
-                    session.send(AgentCommand::Permission {
-                        request_id: request_id.clone(),
-                        option_id,
-                    });
-                }
-                AgentEvent::Update { update, .. }
-                    if update["sessionUpdate"] == "tool_call"
-                        || update["sessionUpdate"] == "tool_call_update" =>
-                {
-                    // Agents can report relative Read paths or shell commands.
-                    // The unique README content in actual tool output proves
-                    // which project was read without guessing a tool's syntax.
-                    read_project_readme |= update
-                        .to_string()
-                        .contains("Orchard Users is a Spring Boot REST service");
-                    if !sent_supplement {
-                        sent_supplement = true;
-                        session.send(AgentCommand::Steer {
-                            token: "purpose".into(),
-                            session_id: id.clone(),
-                            text: "同时说明这个项目是用来做什么的，回答简洁。".into(),
-                            files: vec![],
-                        });
-                    }
-                }
-                AgentEvent::SteeringResult { outcome, .. } => {
-                    steering_outcome = Some(outcome.clone())
-                }
-                AgentEvent::TurnFinished { stop_reason, .. } => return Some(stop_reason.clone()),
-                _ => {}
-            }
-            None
-        },
-    );
-    assert_eq!(reason, "end_turn");
-    assert!(sent_supplement, "the Agent must inspect project files");
-    match steering_outcome.as_deref() {
-        Some("injected") => {}
-        Some("promptRequired") => {
-            let (reason, continuation) =
-                session.prompt(&id, "同时说明这个项目是用来做什么的，回答简洁。");
-            assert_eq!(reason, "end_turn");
-            reply.push_str(&continuation);
-        }
-        other => panic!("supplement was not accepted: {other:?}"),
-    }
-    assert!(
-        read_project_readme,
-        "expected evidence of reading the nested README"
-    );
-    assert!(
-        reply.contains("Orchard") && reply.contains("Spring Boot"),
-        "wrong project reply: {reply}"
-    );
-    session.handle.close();
-
-    let resumed = open(&workspace);
-    resumed.send(AgentCommand::ListSessions {
-        token: "titles".into(),
-    });
-    resumed.wait(
-        "clean project history titles",
-        None,
-        &mut String::new(),
-        |event| {
-            if let AgentEvent::Sessions { sessions, .. } = event {
-                let saved = sessions
-                    .iter()
-                    .find(|session| session.session_id == id)
-                    .expect("the finished project conversation must be listed");
-                assert!(
-                    !saved
-                        .title
-                        .as_deref()
-                        .unwrap_or_default()
-                        .contains("<lithe_workspace_context>"),
-                    "host metadata leaked into history title"
-                );
-                return Some(());
-            }
-            None
-        },
-    );
-    resumed.send(AgentCommand::LoadSession {
-        token: "restore".into(),
-        session_id: id.clone(),
-    });
-    let mut history = String::new();
-    resumed.wait(
-        "nested project history",
-        None,
-        &mut String::new(),
-        |event| {
-            match event {
-                AgentEvent::Update { update, .. }
-                    if update["sessionUpdate"] == "session_info_update" =>
-                {
-                    assert!(
-                        !update["title"]
-                            .as_str()
-                            .unwrap_or_default()
-                            .contains("<lithe_workspace_context>"),
-                        "host metadata leaked into restored title"
-                    );
-                }
-                AgentEvent::Update { update, .. }
-                    if update["sessionUpdate"] == "user_message_chunk" =>
-                {
-                    history.push_str(update["content"]["text"].as_str().unwrap_or_default());
-                }
-                AgentEvent::SessionLoaded { .. } => return Some(()),
-                _ => {}
-            }
-            None
-        },
-    );
-    assert!(
-        !history.contains("<lithe_workspace_context>"),
-        "host metadata leaked into user history"
-    );
-    assert!(
-        history.contains("讲解一下当前项目结构"),
-        "original user message must survive replay"
-    );
-    let (reason, reply) = resumed.prompt(
-        &id,
-        "根据刚才读取的文件，用一句话说明当前项目的名称和用途，不再调用工具。",
-    );
-    assert_eq!(reason, "end_turn");
-    assert!(
-        reply.contains("Orchard") && reply.contains("Spring Boot"),
-        "wrong restored project: {reply}"
-    );
-    resumed.handle.close();
-    println!("Nested project README, supplementary input, restored scope and clean user history verified.");
-}
-
-#[test]
-#[ignore = "requires a real ACP agent, network access, Node.js, and an API key"]
-fn real_agent_reads_edits_tests_and_continues_in_temporary_project() {
-    let workspace = TemporaryProject::new();
-    std::fs::write(
-        workspace.0.join("sum.cjs"),
-        "module.exports = (a, b) => a - b;\n",
-    )
-    .unwrap();
-    std::fs::write(workspace.0.join("sum.test.cjs"),
-        "const assert = require('node:assert/strict');\nconst sum = require('./sum.cjs');\nassert.equal(sum(2, 3), 5);\nassert.equal(sum(-2, 4), 2);\nconsole.log('LITHE_TEST_PASSED');\n").unwrap();
-    let session = open(&workspace.0);
-    let id = session.new_session("workflow");
-    session.send(AgentCommand::Prompt {
-        session_id: id.clone(),
-        text: "Work only in this temporary project. Read sum.cjs and sum.test.cjs, fix the implementation, then execute node sum.test.cjs. Do not install dependencies, access network, or change any file outside this directory. Report the actual test result.".into(),
-        files: vec![],
-    });
-    let mut tools = 0;
-    let mut result_seen = false;
-    let mut reply = String::new();
-    let reason = session.wait("read/edit/test workflow", Some(&id), &mut reply, |event| {
-        match event {
-            AgentEvent::Permission {
-                request_id,
-                request,
-                ..
-            } => {
-                let option = request["options"]
-                    .as_array()
-                    .and_then(|options| options.iter().find(|o| o["kind"] == "allow_once"))
-                    .and_then(|o| o["optionId"].as_str())
-                    .map(String::from);
-                session.send(AgentCommand::Permission {
-                    request_id: request_id.clone(),
-                    option_id: option,
-                });
-            }
-            AgentEvent::Update { update, .. } => {
-                if update["sessionUpdate"] == "tool_call" {
-                    tools += 1;
-                }
-                if update["sessionUpdate"] == "tool_call_update"
-                    && update.to_string().contains("LITHE_TEST_PASSED")
-                {
-                    result_seen = true;
-                }
-            }
-            AgentEvent::TurnFinished { stop_reason, .. } => return Some(stop_reason.clone()),
-            _ => {}
-        }
-        None
-    });
-    assert_eq!(reason, "end_turn");
-    assert!(tools >= 2, "expected file and execution tools");
-    assert!(result_seen, "tool output must contain the test marker");
-    assert!(!std::fs::read_to_string(workspace.0.join("sum.cjs"))
-        .unwrap()
-        .contains("a - b"));
-    assert_eq!(
-        std::fs::read_dir(&workspace.0).unwrap().count(),
-        2,
-        "no extra generated files"
-    );
-    let (reason, reply) = session.prompt(
-        &id,
-        "What command did you just execute and did it pass? Do not use tools.",
-    );
-    assert_eq!(reason, "end_turn");
-    assert!(reply.contains("sum.test.cjs"));
-    session.handle.close();
-}
-
-#[test]
-#[ignore = "requires a real catalog ACP agent and API key configuration"]
-fn real_agent_configuration_options_are_selectable() {
-    let workspace = TemporaryProject::new();
-    let session = open(&workspace.0);
-    session.send(AgentCommand::NewSession {
-        token: "config".into(),
-    });
-    let (id, options) =
-        session.wait(
-            "session configuration",
-            None,
-            &mut String::new(),
-            |event| match event {
-                AgentEvent::SessionCreated {
-                    session_id,
-                    config_options,
-                    ..
-                } => Some((
-                    session_id.clone(),
-                    serde_json::to_value(config_options).unwrap(),
-                )),
-                _ => None,
-            },
-        );
-    let mut options = options
-        .as_array()
-        .expect("Agent reports config options")
-        .clone();
-    for category in ["model", "mode", "thought_level"] {
-        let option = options.iter().find(|option| option["category"] == category);
-        // Thinking choices are optional upstream capabilities, not a product list.
-        if category == "thought_level" && option.is_none() {
-            continue;
-        }
-        let option = option.unwrap_or_else(|| panic!("missing category {category}"));
-        let config_id = option["id"].as_str().unwrap();
-        let current = option["currentValue"].as_str().unwrap();
-        // Switch models as well as reasoning; a same-value acknowledgement
-        // would miss the user-visible failure. Keep the permission mode intact.
-        let value = if category != "mode" {
-            option["options"]
-                .as_array()
-                .unwrap()
-                .iter()
-                .filter_map(|choice| choice["value"].as_str())
-                .filter(|value| *value != current)
-                .next_back()
-                .unwrap_or(current)
-        } else {
-            current
-        };
-        session.send(AgentCommand::SetConfigOption {
-            token: category.into(),
-            session_id: id.clone(),
-            config_id: config_id.into(),
-            value: value.into(),
-        });
-        let updated = session.wait(
-            "config acknowledgement",
-            None,
-            &mut String::new(),
-            |event| match event {
-                AgentEvent::SessionConfigured {
-                    token,
-                    config_options,
-                    ..
-                } if token == category => Some(serde_json::to_value(config_options).unwrap()),
-                _ => None,
-            },
-        );
-        let actual = updated
-            .as_array()
-            .unwrap()
-            .iter()
-            .find(|o| o["id"] == config_id)
-            .unwrap();
-        assert_eq!(actual["currentValue"], value);
-        println!("Configuration {category}: {current} -> {value}");
-        if category == "model" {
-            assert_ne!(
-                value, current,
-                "the integration must switch to another model"
-            );
-        }
-        // Changing the model can remove thinking options (e.g. Claude Haiku).
-        // Subsequent choices must come from the confirmed current catalog.
-        options = updated.as_array().unwrap().clone();
-    }
-    let (reason, reply) = session.prompt(
-        &id,
-        "Do not use any tools. Reply with only LITHE_MODEL_SWITCH_OK.",
-    );
-    assert_eq!(reason, "end_turn");
-    assert!(
-        reply.contains("LITHE_MODEL_SWITCH_OK"),
-        "no reply after switching: {reply:?}"
-    );
-    session.handle.close();
-}
diff --git a/rust/lithe-core/Cargo.toml b/rust/lithe-core/Cargo.toml
index fc406c54..f5ddd096 100644
--- a/rust/lithe-core/Cargo.toml
+++ b/rust/lithe-core/Cargo.toml
@@ -16,12 +16,11 @@ plugin-sdk-e2e = []
 [dependencies]
 lithe-core-rules = { path = "../lithe-core-rules" }
 lithe-git-host = { path = "../lithe-git-host" }
-lithe-agent-host = { path = "../lithe-agent-host" }
 lithe-ide-host = { path = "../lithe-ide-host" }
 lithe-remote = { path = "../lithe-remote", default-features = false, features = ["client"] }
 ammonia = "4.1.4"
 base64 = "0.22"
-chrono = { version = "0.4", default-features = false, features = ["std"] }
+chrono = { version = "0.4", default-features = false, features = ["std", "clock"] }
 encoding_rs = "0.8"
 comrak = { version = "0.54.0", default-features = false, features = ["shortcodes"] }
 rand = "0.8"
@@ -30,7 +29,7 @@ quick-xml = "0.37"
 reqwest = { version = "0.12", default-features = false, features = ["blocking", "json", "rustls-tls"] }
 rsa = { version = "0.9", features = ["pem"] }
 serde = { version = "1.0", features = ["derive", "rc"] }
-serde_json = "1.0"
+serde_json = { version = "1.0", features = ["preserve_order"] }
 sha1 = "0.10"
 sha2 = "0.10"
 shell-words = "=1.1.1"
diff --git a/rust/lithe-core/include/lithe_core.h b/rust/lithe-core/include/lithe_core.h
index 6f70ef3a..03bf4229 100644
--- a/rust/lithe-core/include/lithe_core.h
+++ b/rust/lithe-core/include/lithe_core.h
@@ -19,9 +19,6 @@ int32_t lithe_core_cancel(const char *operation_id);
 void lithe_core_free_string(char *value);
 void lithe_core_install_log_waker(void (*callback)(void *), void *context);
 int32_t lithe_core_remove_log_waker(void *context);
-void *lithe_agent_open_json(const char *configuration, void (*callback)(const char *, void *), void *context);
-int32_t lithe_agent_send_json(void *handle, const char *command);
-void lithe_agent_close(void *handle);
 
 #ifdef __cplusplus
 }
diff --git a/rust/lithe-core/src/agent/attachments.rs b/rust/lithe-core/src/agent/attachments.rs
deleted file mode 100644
index 7ed70cc5..00000000
--- a/rust/lithe-core/src/agent/attachments.rs
+++ /dev/null
@@ -1,11 +0,0 @@
-//! Pasted-image retention dispatch. Listing and deleting files belong to the platform.
-
-use crate::protocol::{CoreError, ErrorCode};
-use lithe_agent_host::attachment_retention;
-use serde_json::Value;
-
-/// Decides which pasted images may be deleted; reads and writes no files.
-pub(crate) fn retention_plan(request: attachment_retention::Request) -> Result<Value, CoreError> {
-    serde_json::to_value(attachment_retention::plan(&request))
-        .map_err(|issue| CoreError::new(ErrorCode::Unknown, issue.to_string()))
-}
diff --git a/rust/lithe-core/src/agent/edits.rs b/rust/lithe-core/src/agent/edits.rs
deleted file mode 100644
index 90fb0327..00000000
--- a/rust/lithe-core/src/agent/edits.rs
+++ /dev/null
@@ -1,14 +0,0 @@
-//! Typed Agent edit rollback planning. Evidence rules belong to Agent Host;
-//! platforms own path containment, encoding, guarded writes and Trash.
-
-use crate::protocol::{cancellation, CoreError, ErrorCode};
-use lithe_agent_host::edit_review;
-use serde_json::Value;
-
-/// Plans `agent.edits.reversePlan` without touching the file system.
-/// Rollback conflicts are successful plans; only malformed payloads fail.
-pub(crate) fn reverse_plan(request: edit_review::ReverseRequest) -> Result<Value, CoreError> {
-    cancellation::check()?;
-    serde_json::to_value(edit_review::reverse_plan(&request))
-        .map_err(|issue| CoreError::new(ErrorCode::Unknown, issue.to_string()))
-}
diff --git a/rust/lithe-core/src/agent/hooks.rs b/rust/lithe-core/src/agent/hooks.rs
deleted file mode 100644
index 57c40205..00000000
--- a/rust/lithe-core/src/agent/hooks.rs
+++ /dev/null
@@ -1,26 +0,0 @@
-//! Typed Hook management dispatch. Native files and execution belong to Agent Host.
-
-use crate::protocol::{cancellation, CoreError, ErrorCode};
-use lithe_agent_host::hooks;
-use serde_json::Value;
-
-/// Synchronizes explicit user edits without executing commands or granting trust.
-pub(crate) fn execute(request: hooks::Request) -> Result<Value, CoreError> {
-    cancellation::check()?;
-    let library = hooks::execute(request, &|| cancellation::check().is_err()).map_err(|issue| {
-        let code = match issue.reason {
-            "cancelled" => ErrorCode::Cancelled,
-            "file_access" | "unsafe_file" => ErrorCode::PermissionDenied,
-            _ => ErrorCode::InvalidRequest,
-        };
-        CoreError::new(code, issue.message).with_details(issue.reason)
-    })?;
-    serde_json::to_value(library)
-        .map_err(|issue| CoreError::new(ErrorCode::Unknown, issue.to_string()))
-}
-
-/// Field-level draft verdict from the same rules `save` enforces; reads no files.
-pub(crate) fn validate_draft(request: hooks::DraftRequest) -> Result<Value, CoreError> {
-    serde_json::to_value(hooks::validate_draft(&request))
-        .map_err(|issue| CoreError::new(ErrorCode::Unknown, issue.to_string()))
-}
diff --git a/rust/lithe-core/src/agent/instructions.rs b/rust/lithe-core/src/agent/instructions.rs
deleted file mode 100644
index 5e1ebb46..00000000
--- a/rust/lithe-core/src/agent/instructions.rs
+++ /dev/null
@@ -1,51 +0,0 @@
-//! Typed global-instruction requests; native file ownership stays in Agent Host.
-
-use crate::protocol::{cancellation, CoreError, ErrorCode};
-use lithe_agent_host::instructions::{self, InstructionError, SaveRequest};
-use serde::Deserialize;
-use serde_json::Value;
-
-/// Selects a supported upstream Agent, never an arbitrary filesystem path.
-#[derive(Deserialize)]
-#[serde(rename_all = "camelCase", deny_unknown_fields)]
-pub(crate) struct ReadRequest {
-    agent_id: String,
-}
-
-/// Reads the effective native global file without creating directories or files.
-pub(crate) fn read(request: ReadRequest) -> Result<Value, CoreError> {
-    cancellation::check()?;
-    encode(instructions::read(&request.agent_id))
-}
-
-/// Atomically saves against the snapshot the user edited; preserves native loading.
-pub(crate) fn save(request: SaveRequest) -> Result<Value, CoreError> {
-    cancellation::check()?;
-    encode(instructions::save(request))
-}
-
-fn encode(
-    result: Result<instructions::InstructionFile, InstructionError>,
-) -> Result<Value, CoreError> {
-    let file = result.map_err(core_error)?;
-    serde_json::to_value(file)
-        .map_err(|error| CoreError::new(ErrorCode::Unknown, error.to_string()))
-}
-
-/// Reads or synchronizes a platform-owned shared instruction library.
-pub(crate) fn shared(request: instructions::shared::Request) -> Result<Value, CoreError> {
-    cancellation::check()?;
-    let result = instructions::shared::execute(request, &|| cancellation::check().is_err())
-        .map_err(core_error)?;
-    serde_json::to_value(result)
-        .map_err(|error| CoreError::new(ErrorCode::Unknown, error.to_string()))
-}
-
-fn core_error(error: InstructionError) -> CoreError {
-    let code = match error.reason {
-        "unsupported_agent" => ErrorCode::NotSupported,
-        "file_access" | "unsafe_file" => ErrorCode::PermissionDenied,
-        _ => ErrorCode::InvalidRequest,
-    };
-    CoreError::new(code, error.message).with_details(error.reason)
-}
diff --git a/rust/lithe-core/src/agent/mod.rs b/rust/lithe-core/src/agent/mod.rs
deleted file mode 100644
index bd8e66d3..00000000
--- a/rust/lithe-core/src/agent/mod.rs
+++ /dev/null
@@ -1,169 +0,0 @@
-//! Agent adapter management commands backed by `lithe-agent-host`.
-//!
-//! Detection and installs use the user's own Node.js and npm; Core only maps
-//! requests, cooperative cancellation, and failures onto the shared envelope.
-
-use std::path::PathBuf;
-
-pub(crate) mod attachments;
-pub(crate) mod edits;
-pub(crate) mod hooks;
-pub(crate) mod instructions;
-
-use serde::Deserialize;
-use serde_json::Value;
-
-use crate::protocol::{cancellation, CoreError, ErrorCode};
-use lithe_agent_host::install::{self, ManagementError};
-
-/// Payload of `agent.status`.
-#[derive(Debug, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub(crate) struct AgentStatusRequest {
-    /// Platform-owned directory holding Lithe-managed adapter installs.
-    data_directory: PathBuf,
-}
-
-/// Payload of `agent.install`, `agent.uninstall`, and `agent.installCli`.
-#[derive(Debug, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub(crate) struct AgentInstallRequest {
-    data_directory: PathBuf,
-    /// ACP registry id of a catalog agent, e.g. `codex-acp`.
-    agent_id: String,
-}
-
-fn cancelled() -> bool {
-    cancellation::check().is_err()
-}
-
-fn absolute(directory: &PathBuf) -> Result<(), CoreError> {
-    if directory.is_absolute() {
-        Ok(())
-    } else {
-        Err(CoreError::new(
-            ErrorCode::InvalidRequest,
-            "The agent data directory must be absolute",
-        ))
-    }
-}
-
-/// Detect Node.js and npm and report every catalog agent's install state.
-pub(crate) fn status(request: AgentStatusRequest) -> Result<Value, CoreError> {
-    absolute(&request.data_directory)?;
-    let status = install::status(&request.data_directory, &cancelled);
-    cancellation::check()?;
-    serde_json::to_value(status)
-        .map_err(|error| CoreError::new(ErrorCode::Unknown, error.to_string()))
-}
-
-/// Install the pinned adapter version with the user's npm.
-pub(crate) fn install(request: AgentInstallRequest) -> Result<Value, CoreError> {
-    absolute(&request.data_directory)?;
-    install::install_with_progress(
-        &request.data_directory,
-        &request.agent_id,
-        &cancelled,
-        &emit_progress,
-    )
-    .map(|version| serde_json::json!({ "agentId": request.agent_id, "installedVersion": version }))
-    .map_err(core_error)
-}
-
-/// Update through the CLI's installation owner and return its verified outcome.
-pub(crate) fn install_cli(request: AgentInstallRequest) -> Result<Value, CoreError> {
-    absolute(&request.data_directory)?;
-    install::install_cli_with_progress(&request.agent_id, &cancelled, &emit_progress)
-        .map(|result| {
-            serde_json::json!({ "agentId": request.agent_id,
-            "cliVersion": result.cli_version, "updaterWarning": result.updater_warning })
-        })
-        .map_err(core_error)
-}
-
-/// Remove a Lithe-managed adapter install.
-pub(crate) fn uninstall(request: AgentInstallRequest) -> Result<Value, CoreError> {
-    absolute(&request.data_directory)?;
-    install::uninstall(&request.data_directory, &request.agent_id)
-        .map(|()| serde_json::json!({ "agentId": request.agent_id }))
-        .map_err(core_error)
-}
-
-fn core_error(error: ManagementError) -> CoreError {
-    // Prefer the envelope's own cancellation state so a deadline reports
-    // `timed_out` and a user cancel reports `cancelled`.
-    if matches!(error, ManagementError::Cancelled) {
-        if let Err(error) = cancellation::check() {
-            return error;
-        }
-    }
-    let code = match error {
-        ManagementError::UnknownAgent(_) => ErrorCode::InvalidRequest,
-        ManagementError::RuntimeMissing(_) => ErrorCode::RuntimeMissing,
-        ManagementError::Failed(_) => ErrorCode::ProcessFailed,
-        ManagementError::Cancelled => ErrorCode::Cancelled,
-        ManagementError::TimedOut => ErrorCode::TimedOut,
-    };
-    CoreError::new(code, error.message())
-}
-
-/// Request-scoped install event destination. No callbacks outlive a synchronous request.
-#[derive(Clone)]
-struct ProgressContext {
-    sink: std::sync::Arc<dyn Fn(&str) + Send + Sync>,
-    operation_id: Option<String>,
-}
-thread_local! {
-    static PROGRESS: std::cell::RefCell<Option<ProgressContext>> = const { std::cell::RefCell::new(None) };
-}
-
-struct ProgressScope(Option<ProgressContext>);
-impl Drop for ProgressScope {
-    fn drop(&mut self) {
-        PROGRESS.with(|p| *p.borrow_mut() = self.0.take());
-    }
-}
-
-/// Shares the existing event ABI with npm management, preserving nested request scopes.
-pub(crate) fn with_progress_sink<T>(
-    request: &str,
-    sink: std::sync::Arc<dyn Fn(&str) + Send + Sync>,
-    work: impl FnOnce() -> T,
-) -> T {
-    let request: Value = serde_json::from_str(request).unwrap_or(Value::Null);
-    let operation_id = request
-        .get("operationId")
-        .or_else(|| request.get("id"))
-        .and_then(Value::as_str)
-        .map(str::to_owned);
-    let _scope =
-        ProgressScope(PROGRESS.with(|p| p.replace(Some(ProgressContext { sink, operation_id }))));
-    work()
-}
-
-fn emit_progress(progress: install::InstallProgress) {
-    // Temporarily revoke the scope while delivering: a callback may re-enter Core.
-    let context = PROGRESS.with(|p| p.take());
-    let _restore = ProgressScope(context.clone());
-    if let Some(context) = context {
-        (context.sink)(&serde_json::json!({
-            "kind": "agentInstallProgress", "operationId": context.operation_id, "progress": progress
-        }).to_string());
-    }
-}
-
-/// Execute explicit native skill discovery, installation or visibility configuration.
-pub(crate) fn skills(request: lithe_agent_host::skills::Request) -> Result<Value, CoreError> {
-    use lithe_agent_host::skills::Error;
-    let result = lithe_agent_host::skills::execute(request, &cancelled);
-    cancellation::check()?;
-    result.map_err(|error| {
-        let code = match &error {
-            Error::Invalid(_) => ErrorCode::InvalidRequest,
-            Error::MissingCLI => ErrorCode::RuntimeMissing,
-            Error::Cancelled => ErrorCode::Cancelled,
-            Error::Failed(_) => ErrorCode::ProcessFailed,
-        };
-        CoreError::new(code, error.message())
-    })
-}
diff --git a/rust/lithe-core/src/diagnostics/helper_failures.rs b/rust/lithe-core/src/diagnostics/helper_failures.rs
index fc1052a3..35da603f 100644
--- a/rust/lithe-core/src/diagnostics/helper_failures.rs
+++ b/rust/lithe-core/src/diagnostics/helper_failures.rs
@@ -7,11 +7,11 @@ use std::sync::Once;
 
 static INSTALL: Once = Once::new();
 
-/// Every Core command, standalone ACP open and direct IDE/AskPass entry calls
-/// this before invoking helpers or starting workers. Subsequent calls are cheap.
+/// Every Core command and direct IDE/AskPass entry calls this before invoking
+/// helpers or starting workers. Subsequent calls are cheap.
 pub(crate) fn install() {
     INSTALL.call_once(|| {
-        lithe_agent_host::failure_log::install_failure_sink(sink);
+        lithe_git_host::failure_log::install_failure_sink(sink);
         lithe_git_host::failure_log::install_failure_sink(sink);
         lithe_ide_host::failure_log::install_failure_sink(sink);
         lithe_remote::failure_log::install_failure_sink(sink);
@@ -65,7 +65,6 @@ mod tests {
             ("error_domain", json!("io")),
         ];
         for (events, channel) in [
-            (lithe_agent_host::failure_log::EVENTS, "agent"),
             (lithe_git_host::failure_log::EVENTS, "vcs/git"),
             (lithe_ide_host::failure_log::EVENTS, "app"),
             (lithe_remote::failure_log::EVENTS, "remote"),
diff --git a/rust/lithe-core/src/lib.rs b/rust/lithe-core/src/lib.rs
index d3729d0a..d490e08a 100644
--- a/rust/lithe-core/src/lib.rs
+++ b/rust/lithe-core/src/lib.rs
@@ -1,7 +1,6 @@
 //! Deterministic application services shared by the macOS and Windows hosts.
 
 mod action_search;
-mod agent;
 pub mod ai;
 mod build;
 mod community;
@@ -76,18 +75,16 @@ pub fn cancel_operation(operation_id: &str) -> bool {
 #[cfg(test)]
 mod tests;
 
-/// Executes a request with Git diagnostics, search snapshots, and Agent progress.
+/// Executes a request with Git diagnostics and search snapshots.
 /// The observer is scoped to this call; callbacks complete before the final JSON returns.
 pub fn execute_json_with_events(
     request: &str,
     sink: std::sync::Arc<dyn Fn(&str) + Send + Sync>,
 ) -> String {
-    agent::with_progress_sink(request, sink.clone(), || {
-        git::execution_events::with_sink(sink, || {
-            let response = execute_json(request);
-            git::execution_events::request_finished(&response);
-            response
-        })
+    git::execution_events::with_sink(sink, || {
+        let response = execute_json(request);
+        git::execution_events::request_finished(&response);
+        response
     })
 }
 
diff --git a/rust/lithe-core/src/mcp/mod.rs b/rust/lithe-core/src/mcp/mod.rs
index 314152f4..73f88873 100644
--- a/rust/lithe-core/src/mcp/mod.rs
+++ b/rust/lithe-core/src/mcp/mod.rs
@@ -21,47 +21,6 @@ pub use plan::plan_write;
 pub use registry::{featured_registry, parse_registry};
 pub use tools::{command_line, tool_policy};
 
-/// Bridges a user-requested probe to the process/network owner in Agent Host.
-pub(crate) fn probe(
-    request: lithe_agent_host::mcp_probe::Request,
-) -> Result<serde_json::Value, crate::protocol::CoreError> {
-    use crate::protocol::{cancellation, CoreError, ErrorCode};
-    cancellation::check()?;
-    let result = lithe_agent_host::mcp_probe::execute(request, &|| cancellation::check().is_err());
-    cancellation::check()?;
-    result.map_err(|error| {
-        use lithe_agent_host::mcp_probe::Error;
-        let (code, message) = match error {
-            Error::Invalid => (
-                ErrorCode::InvalidRequest,
-                "Check the MCP command, URL and headers.",
-            ),
-            Error::Unsupported => (
-                ErrorCode::NotSupported,
-                "Legacy SSE probing is unavailable. Use the publisher's Streamable HTTP endpoint.",
-            ),
-            Error::Start => (
-                ErrorCode::RuntimeMissing,
-                "Could not start the MCP command. Check its executable and runtime.",
-            ),
-            Error::Connection => (
-                ErrorCode::ProcessFailed,
-                "MCP connection failed. Check the server, network and authentication.",
-            ),
-            Error::Limit => (
-                ErrorCode::InvalidRequest,
-                "MCP tool metadata exceeded the inspection limit.",
-            ),
-            Error::Timeout => (
-                ErrorCode::TimedOut,
-                "MCP detection timed out after 30 seconds.",
-            ),
-            Error::Cancelled => (ErrorCode::Cancelled, "MCP detection was cancelled."),
-        };
-        CoreError::new(code, message)
-    })
-}
-
 #[cfg(test)]
 mod library_tests;
 #[cfg(test)]
diff --git a/rust/lithe-core/src/protocol/command.rs b/rust/lithe-core/src/protocol/command.rs
index 1cfad8be..c2c0abe7 100644
--- a/rust/lithe-core/src/protocol/command.rs
+++ b/rust/lithe-core/src/protocol/command.rs
@@ -57,30 +57,6 @@ pub enum CoreCommand {
     Ping,
     /// Matches host-localized action text without workspace I/O (`search.actions`).
     SearchActions,
-    /// Detects Node.js and npm and lists catalog agent installs (`agent.status`).
-    AgentStatus,
-    /// Reads the effective native global instruction file (`agent.instructions.read`).
-    AgentInstructionsRead,
-    /// Saves a guarded native global instruction draft (`agent.instructions.save`).
-    AgentInstructionsSave,
-    /// Synchronizes a marked shared block in native user files (`agent.instructions.shared`).
-    AgentInstructionsShared,
-    /// Lists native skills or creates/imports one explicitly (`agent.skills`).
-    AgentSkills,
-    /// Manages a user Hook library and native Agent configuration (`agent.hooks`).
-    AgentHooks,
-    /// Installs a catalog ACP adapter with the user's npm (`agent.install`).
-    AgentInstall,
-    /// Removes a Lithe-managed ACP adapter install (`agent.uninstall`).
-    AgentUninstall,
-    /// Installs or updates an agent's CLI through its installation owner (`agent.installCli`).
-    AgentInstallCli,
-    /// Plans a rollback of one file's Agent edits from evidence and disk text (`agent.edits.reversePlan`).
-    AgentEditsReversePlan,
-    /// Validates an unsaved Hook draft field by field (`agent.hooks.validateDraft`).
-    AgentHooksValidateDraft,
-    /// Plans which pasted Agent images may be deleted (`agent.attachments.retentionPlan`).
-    AgentAttachmentsRetentionPlan,
     /// Budgets diff prefixes before crossing the native boundary (`ai.commitInputBudget`).
     AiCommitInputBudget,
     /// Plans a credential-free commit message request (`ai.planCommit`).
@@ -107,8 +83,6 @@ pub enum CoreCommand {
     McpFeaturedRegistry,
     /// Plans a format-preserving MCP entry write or removal (`mcp.planWrite`).
     McpPlanWrite,
-    /// Probes an explicitly selected server without calling its tools.
-    McpProbe,
     /// Reads or plans native per-tool exclusion lists.
     McpToolPolicy,
     /// Round-trips a quoted command line into exact argv boundaries.
@@ -851,18 +825,6 @@ impl CoreCommand {
         match value {
             "core.ping" => Some(Self::Ping),
             "ideHost.control" => Some(Self::IdeHostControl),
-            "agent.status" => Some(Self::AgentStatus),
-            "agent.instructions.read" => Some(Self::AgentInstructionsRead),
-            "agent.instructions.save" => Some(Self::AgentInstructionsSave),
-            "agent.instructions.shared" => Some(Self::AgentInstructionsShared),
-            "agent.skills" => Some(Self::AgentSkills),
-            "agent.hooks" => Some(Self::AgentHooks),
-            "agent.install" => Some(Self::AgentInstall),
-            "agent.uninstall" => Some(Self::AgentUninstall),
-            "agent.installCli" => Some(Self::AgentInstallCli),
-            "agent.edits.reversePlan" => Some(Self::AgentEditsReversePlan),
-            "agent.hooks.validateDraft" => Some(Self::AgentHooksValidateDraft),
-            "agent.attachments.retentionPlan" => Some(Self::AgentAttachmentsRetentionPlan),
             "ai.commitInputBudget" => Some(Self::AiCommitInputBudget),
             "ai.planCommit" => Some(Self::AiPlanCommit),
             "ai.decodeCommitMessage" => Some(Self::AiDecodeCommitMessage),
@@ -876,7 +838,6 @@ impl CoreCommand {
             "mcp.parseRegistry" => Some(Self::McpParseRegistry),
             "mcp.featuredRegistry" => Some(Self::McpFeaturedRegistry),
             "mcp.planWrite" => Some(Self::McpPlanWrite),
-            "mcp.probe" => Some(Self::McpProbe),
             "mcp.toolPolicy" => Some(Self::McpToolPolicy),
             "mcp.commandLine" => Some(Self::McpCommandLine),
             "mcp.librarySnapshot" => Some(Self::McpLibrarySnapshot),
diff --git a/rust/lithe-core/src/runtime/dispatcher.rs b/rust/lithe-core/src/runtime/dispatcher.rs
index 35826374..ae4b828f 100644
--- a/rust/lithe-core/src/runtime/dispatcher.rs
+++ b/rust/lithe-core/src/runtime/dispatcher.rs
@@ -192,21 +192,6 @@ fn execute_parsed(mut parsed: CoreRequest) -> CoreResponse {
                 "coreVersion": env!("CARGO_PKG_VERSION")
             }),
         ),
-        CoreCommand::AgentStatus => agent_response(id, parsed.payload, crate::agent::status),
-        CoreCommand::AgentInstructionsRead => {
-            agent_response(id, parsed.payload, crate::agent::instructions::read)
-        }
-        CoreCommand::AgentInstructionsSave => {
-            agent_response(id, parsed.payload, crate::agent::instructions::save)
-        }
-        CoreCommand::AgentInstructionsShared => {
-            agent_response(id, parsed.payload, crate::agent::instructions::shared)
-        }
-        CoreCommand::AgentSkills => agent_response(id, parsed.payload, crate::agent::skills),
-        CoreCommand::AgentHooks => agent_response(id, parsed.payload, crate::agent::hooks::execute),
-        CoreCommand::AgentEditsReversePlan => {
-            agent_response(id, parsed.payload, crate::agent::edits::reverse_plan)
-        }
         CoreCommand::AiCommitInputBudget => {
             plugin_response(id, parsed.payload, crate::ai::commit_input_budget_command)
         }
@@ -234,14 +219,6 @@ fn execute_parsed(mut parsed: CoreRequest) -> CoreResponse {
         CoreCommand::AiInlineEditDecode => {
             plugin_response(id, parsed.payload, crate::ai::decode_inline_edit_command)
         }
-        CoreCommand::AgentHooksValidateDraft => {
-            agent_response(id, parsed.payload, crate::agent::hooks::validate_draft)
-        }
-        CoreCommand::AgentAttachmentsRetentionPlan => agent_response(
-            id,
-            parsed.payload,
-            crate::agent::attachments::retention_plan,
-        ),
         CoreCommand::McpParseConfiguration => {
             match crate::mcp::parse_configuration(parsed.payload) {
                 Ok(data) => CoreResponse::success(id, data),
@@ -256,7 +233,6 @@ fn execute_parsed(mut parsed: CoreRequest) -> CoreResponse {
             Ok(data) => CoreResponse::success(id, data),
             Err(error) => CoreResponse::failure(id, error),
         },
-        CoreCommand::McpProbe => agent_response(id, parsed.payload, crate::mcp::probe),
         CoreCommand::McpToolPolicy => match crate::mcp::tool_policy(parsed.payload) {
             Ok(data) => CoreResponse::success(id, data),
             Err(error) => CoreResponse::failure(id, error),
@@ -743,11 +719,6 @@ fn execute_parsed(mut parsed: CoreRequest) -> CoreResponse {
             parsed.payload,
             crate::plugins::marketplace::install_review_command,
         ),
-        CoreCommand::AgentInstall => agent_response(id, parsed.payload, crate::agent::install),
-        CoreCommand::AgentUninstall => agent_response(id, parsed.payload, crate::agent::uninstall),
-        CoreCommand::AgentInstallCli => {
-            agent_response(id, parsed.payload, crate::agent::install_cli)
-        }
         CoreCommand::CommunityDiscourseAuthBegin => {
             match serde_json::from_value::<DiscourseAuthorizationBeginRequest>(parsed.payload)
                 .map_err(|error| {
diff --git a/rust/lithe-core/src/runtime/ffi.rs b/rust/lithe-core/src/runtime/ffi.rs
index 2c509dd3..e2f19aa8 100644
--- a/rust/lithe-core/src/runtime/ffi.rs
+++ b/rust/lithe-core/src/runtime/ffi.rs
@@ -3,19 +3,6 @@
 use std::ffi::{CStr, CString};
 use std::os::raw::c_char;
 use std::path::PathBuf;
-use std::sync::{Arc, Mutex};
-
-struct AgentFFIHandle {
-    handle: lithe_agent_host::AgentHandle,
-    callback: Arc<
-        Mutex<
-            Option<(
-                unsafe extern "C" fn(*const c_char, *mut std::ffi::c_void),
-                usize,
-            )>,
-        >,
-    >,
-}
 
 /// Returns a pointer to the static, NUL-terminated Core ABI version.
 ///
@@ -201,101 +188,6 @@ pub unsafe extern "C" fn lithe_core_git_askpass(prompt: *const c_char) -> i32 {
     crate::git_askpass_main(&CStr::from_ptr(prompt).to_string_lossy())
 }
 
-/// Starts one ACP agent connection and delivers UTF-8 JSON events on a worker thread.
-///
-/// The returned opaque handle must be closed once with [`lithe_agent_close`].
-///
-/// # Safety
-///
-/// `configuration` must be readable NUL-terminated JSON. `callback` must not
-/// unwind or retain its borrowed event pointer. `context` must remain valid
-/// until `lithe_agent_close` returns. Other handle calls must not race close.
-#[no_mangle]
-pub unsafe extern "C" fn lithe_agent_open_json(
-    configuration: *const c_char,
-    callback: Option<unsafe extern "C" fn(*const c_char, *mut std::ffi::c_void)>,
-    context: *mut std::ffi::c_void,
-) -> *mut std::ffi::c_void {
-    crate::diagnostics::helper_failures::install();
-    let Some(callback) = callback else {
-        return std::ptr::null_mut();
-    };
-    if configuration.is_null() {
-        return std::ptr::null_mut();
-    }
-    let Ok(launch) = serde_json::from_slice::<lithe_agent_host::AgentLaunch>(
-        CStr::from_ptr(configuration).to_bytes(),
-    ) else {
-        return std::ptr::null_mut();
-    };
-    let callback_state = Arc::new(Mutex::new(Some((callback, context as usize))));
-    let state = callback_state.clone();
-    let emit = Arc::new(move |event: lithe_agent_host::AgentEvent| {
-        if let Ok(json) = serde_json::to_string(&event) {
-            if let Ok(json) = CString::new(json) {
-                // Holding the lock lets close revoke the callback only after an
-                // in-flight call returns, so Swift can then release context.
-                if let Ok(state) = state.lock() {
-                    if let Some((callback, context)) = *state {
-                        callback(json.as_ptr(), context as *mut std::ffi::c_void);
-                    }
-                }
-            }
-        }
-    });
-    match lithe_agent_host::AgentHandle::open(launch, emit) {
-        Ok(handle) => Box::into_raw(Box::new(AgentFFIHandle {
-            handle,
-            callback: callback_state,
-        }))
-        .cast(),
-        Err(_) => std::ptr::null_mut(),
-    }
-}
-
-/// Queues one UTF-8 JSON command on an ACP connection; returns 1 when accepted.
-///
-/// Commands follow `rust/fixtures/agent/acp-events-v1.json`. Results arrive
-/// asynchronously as events; 0 means the JSON was invalid, the permission
-/// request is gone, or the connection has stopped.
-///
-/// # Safety
-/// `handle` must be an open handle from `lithe_agent_open_json`; `command` must
-/// be a readable NUL-terminated string for this call.
-#[no_mangle]
-pub unsafe extern "C" fn lithe_agent_send_json(
-    handle: *mut std::ffi::c_void,
-    command: *const c_char,
-) -> i32 {
-    if handle.is_null() || command.is_null() {
-        return 0;
-    }
-    let handle = &*(handle as *mut AgentFFIHandle);
-    let Ok(command) = serde_json::from_slice::<lithe_agent_host::AgentCommand>(
-        CStr::from_ptr(command).to_bytes(),
-    ) else {
-        return 0;
-    };
-    handle.handle.send(command).is_ok() as i32
-}
-
-/// Revokes callbacks, stops the agent tree, and frees an ACP handle.
-///
-/// # Safety
-/// `handle` must be null or an open handle from `lithe_agent_open_json`. Calls
-/// using the same handle must finish before close; the handle is invalid after.
-#[no_mangle]
-pub unsafe extern "C" fn lithe_agent_close(handle: *mut std::ffi::c_void) {
-    if handle.is_null() {
-        return;
-    }
-    let handle = Box::from_raw(handle as *mut AgentFFIHandle);
-    if let Ok(mut callback) = handle.callback.lock() {
-        callback.take();
-    }
-    handle.handle.close();
-}
-
 #[cfg(test)]
 mod text_content_tests {
     use super::lithe_core_is_plain_text;
diff --git a/rust/lithe-core/src/tests/agent.rs b/rust/lithe-core/src/tests/agent.rs
deleted file mode 100644
index e1f94c5a..00000000
--- a/rust/lithe-core/src/tests/agent.rs
+++ /dev/null
@@ -1,286 +0,0 @@
-use crate::execute_json;
-use serde_json::{json, Value};
-
-#[test]
-fn global_instruction_contract_dispatches_and_rejects_unknown_agents_without_file_access() {
-    let fixture: Value = serde_json::from_str(include_str!(
-        "../../../fixtures/agent/agent-instructions-v1.json"
-    ))
-    .unwrap();
-    for key in ["readRequest", "saveRequest"] {
-        let command = fixture[key]["command"].as_str().unwrap();
-        assert!(crate::protocol::CoreCommand::parse(command).is_some());
-        let mut payload = fixture[key]["payload"].clone();
-        payload["agentId"] = json!("unknown-agent");
-        let response = run(command, payload);
-        assert_eq!(response["ok"], false);
-        assert_eq!(response["error"]["code"], "not_supported");
-        assert_eq!(response["error"]["details"], "unsupported_agent");
-    }
-    let response = run(
-        "agent.instructions.save",
-        json!({"agentId":"codex-acp","content":"no guard"}),
-    );
-    assert_eq!(response["error"]["code"], "invalid_request");
-    let response = run(
-        "agent.instructions.read",
-        json!({"agentId":"codex-acp","path":"/untrusted/arbitrary.md"}),
-    );
-    assert_eq!(response["error"]["code"], "invalid_request");
-}
-
-#[test]
-fn shared_instruction_requests_have_strict_typed_dispatch_without_arbitrary_native_paths() {
-    assert!(crate::protocol::CoreCommand::parse("agent.instructions.shared").is_some());
-    for payload in [
-        json!({"dataDirectory":"relative", "action":"read"}),
-        json!({"dataDirectory":"/fixture", "action":"unknown"}),
-        json!({"dataDirectory":"/fixture", "action":"read", "path":"/arbitrary"}),
-        json!({"dataDirectory":"/fixture", "action":"setEnabled", "agentId":"codex-acp", "enabled":true}),
-    ] {
-        let response = run("agent.instructions.shared", payload);
-        assert_eq!(response["ok"], false, "{response}");
-        assert_eq!(response["error"]["code"], "invalid_request");
-    }
-}
-
-fn run(command: &str, payload: Value) -> Value {
-    let request = json!({ "id": "agent-test", "command": command, "payload": payload });
-    serde_json::from_str(&execute_json(&request.to_string())).expect("core response JSON")
-}
-
-#[test]
-fn hook_contract_dispatch_is_strict_before_accessing_native_files() {
-    let fixture: Value = serde_json::from_str(include_str!(
-        "../../../fixtures/agent/hooks-management-v1.json"
-    ))
-    .unwrap();
-    assert!(crate::protocol::CoreCommand::parse(fixture["command"].as_str().unwrap()).is_some());
-    for payload in [
-        json!({"dataDirectory":"relative", "action":"read"}),
-        json!({"dataDirectory":"/fixture", "action":"unknown"}),
-        json!({"dataDirectory":"/fixture", "action":"read", "path":"/arbitrary"}),
-        json!({"dataDirectory":"/fixture", "action":"save", "hook":fixture["hook"]}),
-    ] {
-        let response = run("agent.hooks", payload);
-        assert_eq!(response["ok"], false, "{response}");
-        assert_eq!(response["error"]["code"], "invalid_request", "{response}");
-    }
-}
-
-fn fixture() -> Value {
-    serde_json::from_str(include_str!(
-        "../../../fixtures/agent/agent-management-v1.json"
-    ))
-    .expect("agent management fixture")
-}
-
-#[test]
-fn fixture_requests_are_accepted_by_the_dispatcher() {
-    for name in ["status", "install", "uninstall", "installCli"] {
-        let command = fixture()["requests"][name]["command"]
-            .as_str()
-            .unwrap()
-            .to_owned();
-        assert!(
-            crate::protocol::CoreCommand::parse(&command).is_some(),
-            "{command}"
-        );
-    }
-}
-
-#[test]
-fn status_reports_every_catalog_agent_in_the_fixture_shape() {
-    let data = std::env::temp_dir().join(format!("lithe-core-agent-{}", std::process::id()));
-    let response = run("agent.status", json!({ "dataDirectory": data }));
-    assert_eq!(response["ok"], true, "{response}");
-    let expected = &fixture()["responses"]["status"];
-    let agents = response["data"]["agents"].as_array().expect("agents");
-    let ids: Vec<&str> = agents
-        .iter()
-        .filter_map(|agent| agent["id"].as_str())
-        .collect();
-    assert_eq!(ids, ["codex-acp", "claude-acp"]);
-    // Detected values depend on the machine; the keys must match the contract.
-    let keys = |value: &Value| {
-        let mut keys: Vec<String> = value.as_object().unwrap().keys().cloned().collect();
-        keys.sort();
-        keys
-    };
-    let mut agent = agents[0].clone();
-    let mut expected_agent = expected["agents"][0].clone();
-    for value in [&mut agent, &mut expected_agent] {
-        if let Some(available) = value.as_object_mut().unwrap().remove("updateAvailable") {
-            assert!(available.is_boolean(), "{available}");
-        }
-    }
-    assert_eq!(keys(&agent), keys(&expected_agent));
-    assert_eq!(keys(&agents[0]["cli"]), keys(&expected["agents"][0]["cli"]));
-    let mut installation = agents[0]["cli"]["installation"].clone();
-    let mut expected_installation = expected["agents"][0]["cli"]["installation"].clone();
-    // Optional query results depend on installed tools and registry access.
-    // Validate their types when present without requiring runner-specific availability.
-    for value in [&mut installation, &mut expected_installation] {
-        for field in ["updateAvailable", "availableVersion", "updateCheckError"] {
-            if let Some(result) = value.as_object_mut().unwrap().remove(field) {
-                assert!(
-                    if field == "updateAvailable" {
-                        result.is_boolean()
-                    } else {
-                        result.is_string()
-                    },
-                    "{field}: {result}"
-                );
-            }
-        }
-    }
-    assert_eq!(keys(&installation), keys(&expected_installation));
-    assert_eq!(
-        keys(&response["data"]["environment"]),
-        keys(&expected["environment"])
-    );
-    assert_eq!(agents[0]["installedVersion"], Value::Null);
-}
-
-#[test]
-fn invalid_management_requests_fail_with_stable_codes() {
-    let data = std::env::temp_dir();
-    let unknown = run(
-        "agent.install",
-        json!({ "dataDirectory": data, "agentId": "unknown" }),
-    );
-    assert_eq!(unknown["error"]["code"], "invalid_request", "{unknown}");
-    let relative = run("agent.status", json!({ "dataDirectory": "relative/path" }));
-    assert_eq!(relative["error"]["code"], "invalid_request", "{relative}");
-    let no_cli = run(
-        "agent.installCli",
-        json!({ "dataDirectory": data, "agentId": "unknown" }),
-    );
-    assert_eq!(no_cli["error"]["code"], "invalid_request", "{no_cli}");
-    let missing = run("agent.uninstall", json!({ "dataDirectory": data }));
-    assert_eq!(missing["error"]["code"], "invalid_request", "{missing}");
-    let removed = run(
-        "agent.uninstall",
-        json!({ "dataDirectory": data.join("lithe-missing-agents"), "agentId": "codex-acp" }),
-    );
-    assert_eq!(
-        removed["ok"], true,
-        "removing a missing install succeeds: {removed}"
-    );
-}
-
-#[test]
-fn install_progress_is_request_scoped_and_uses_the_operation_identifier() {
-    use std::sync::{Arc, Mutex};
-    let captured = Arc::new(Mutex::new(Vec::<Value>::new()));
-    let capture = captured.clone();
-    let request = json!({"command":"agent.installCli", "operationId":"progress-fixture",
-                         "payload":{"dataDirectory":std::env::temp_dir(), "agentId":"unknown"}});
-    let result: Value = serde_json::from_str(&crate::execute_json_with_events(
-        &request.to_string(),
-        Arc::new(move |event| {
-            capture
-                .lock()
-                .unwrap()
-                .push(serde_json::from_str(event).unwrap());
-        }),
-    ))
-    .unwrap();
-    assert_eq!(result["ok"], false);
-    let events = captured.lock().unwrap();
-    let event = events
-        .iter()
-        .find(|e| e["kind"] == "agentInstallProgress")
-        .unwrap();
-    assert_eq!(event["operationId"], "progress-fixture");
-    assert_eq!(event["progress"]["downloadedBytes"], 0);
-    assert_eq!(
-        event["progress"],
-        fixture()["events"]["preparing"]["progress"]
-    );
-    let count = events.len();
-    drop(events);
-    crate::execute_json(&request.to_string());
-    assert_eq!(
-        captured.lock().unwrap().len(),
-        count,
-        "the callback must not escape its request"
-    );
-}
-
-#[test]
-fn cli_update_outcome_fixture_preserves_verified_version_and_warning() {
-    use lithe_agent_host::install::CliUpdateResult;
-    for (name, version, warning) in [
-        ("installCli", "0.160.1", None),
-        (
-            "installCliRecovered",
-            "0.161.1",
-            Some("Download failed; retry completed"),
-        ),
-    ] {
-        let result = CliUpdateResult {
-            cli_version: version.into(),
-            updater_warning: warning.map(str::to_owned),
-        };
-        let mut actual = serde_json::to_value(result).unwrap();
-        actual["agentId"] = json!("codex-acp");
-        assert_eq!(actual, fixture()["responses"][name]);
-    }
-}
-
-#[test]
-fn edit_reverse_plan_dispatches_shared_fixture_and_rejects_malformed_payloads() {
-    let fixture: Value =
-        serde_json::from_str(include_str!("../../../fixtures/agent/edit-review-v1.json")).unwrap();
-    assert!(crate::protocol::CoreCommand::parse("agent.edits.reversePlan").is_some());
-    for case in fixture["reversePlan"].as_array().unwrap() {
-        // Reverse plan cases use literal text only; generators belong to evidence cases.
-        let response = run("agent.edits.reversePlan", case["request"].clone());
-        assert_eq!(response["ok"], true, "{}", case["name"]);
-        assert_eq!(response["data"], case["expected"], "{}", case["name"]);
-    }
-    let response = run(
-        "agent.edits.reversePlan",
-        json!({"diffs": [{"oldText": "a", "truncated": false}], "disk": "a"}),
-    );
-    assert_eq!(response["error"]["code"], "invalid_request");
-    let response = run(
-        "agent.edits.reversePlan",
-        json!({"diffs": [], "disk": null, "workspace": "/arbitrary"}),
-    );
-    assert_eq!(response["error"]["code"], "invalid_request");
-}
-
-/// Both editors call this command; the dispatcher must return the fixture verdicts.
-#[test]
-fn hook_draft_validation_dispatch_returns_the_shared_field_codes() {
-    let fixture: Value = serde_json::from_str(include_str!(
-        "../../../fixtures/agent/hook-draft-validation-v1.json"
-    ))
-    .unwrap();
-    let command = fixture["command"].as_str().unwrap();
-    for case in fixture["cases"].as_array().unwrap() {
-        let response = run(command, case["request"].clone());
-        assert_eq!(response["ok"], true, "{response}");
-        assert_eq!(response["data"], case["expected"], "{}", case["name"]);
-    }
-    let response = run(command, json!({"hook": {"name": "x"}}));
-    assert_eq!(response["error"]["code"], "invalid_request", "{response}");
-}
-
-#[test]
-fn attachment_retention_dispatch_follows_the_shared_fixture() {
-    let fixture: Value = serde_json::from_str(include_str!(
-        "../../../fixtures/agent/attachment-retention-v1.json"
-    ))
-    .unwrap();
-    let command = fixture["command"].as_str().unwrap();
-    for case in fixture["cases"].as_array().unwrap() {
-        let response = run(command, case["request"].clone());
-        assert_eq!(response["ok"], true, "{response}");
-        assert_eq!(response["data"], case["expected"], "{}", case["name"]);
-    }
-    let response = run(command, json!({"entries": []}));
-    assert_eq!(response["error"]["code"], "invalid_request", "{response}");
-}
diff --git a/rust/lithe-core/src/tests/mod.rs b/rust/lithe-core/src/tests/mod.rs
index fbb12a0c..83c3303d 100644
--- a/rust/lithe-core/src/tests/mod.rs
+++ b/rust/lithe-core/src/tests/mod.rs
@@ -1,4 +1,3 @@
-mod agent;
 mod build_configuration;
 mod build_project_options;
 mod build_runtime_versions;
diff --git a/rust/logging/README.md b/rust/logging/README.md
index 8629c1db..2bc53e4d 100644
--- a/rust/logging/README.md
+++ b/rust/logging/README.md
@@ -108,7 +108,7 @@ Swift 的事件值是**未经脱敏的内存输入**，不能自行序列化落
 
 ## 八、辅助 crate
 
-- `rust/lithe-agent-host`、`rust/lithe-git-host`、`rust/lithe-ide-host` 和 `rust/lithe-remote` 的客户端链接进 Core，各自通过 `failure_log` 模块交出失败事实，依赖方向保持不变。sink 未注入时只增加原子计数，不写 stderr。
+- `rust/lithe-git-host`、`rust/lithe-ide-host` 和 `rust/lithe-remote` 的客户端链接进 Core，各自通过 `failure_log` 模块交出失败事实，依赖方向保持不变。sink 未注入时只增加原子计数，不写 stderr。
 - Core 的 `diagnostics/helper_failures` 是唯一的安装处。JSON dispatcher、独立 ACP FFI open、直接 IDE dispatcher 和 AskPass 入口在调用辅助 crate 前都经过它的 `Once`。sink 只转换标量字段，之后走相同的目录校验、脱敏和 256 条 Core 队列。这些事件的 owner 都是 `lithe-core`，错误只保留固定摘要和类别。
 - 辅助 crate 的收尾只记录丢失数据、能力或清理结果的意外错误。已断开的连接、已退出的进程，以及远程关闭或取消时的 Disconnected、Timeout，在类型化辅助函数里豁免；ACP Cancel 的 InternalError 无法区分正常断连与序列化失败，按预期缺失豁免。转发 accept 与 bridge 失败可能逐连接发生，目录 rate 为 12；`rust/lithe-remote/src/client/forward.rs` 在发送侧让每一族失败在进程内每 5 秒最多记录一条，并发转发连接也共用这个限制，正常断连不占日志配额。强制终止后进程仍未退出的最终超时保留 WARN。
 
@@ -158,7 +158,7 @@ Rust 通过静态 `EVENTS`（按 ID 排序）和二分查找的 `event_by_id` 
 
 ## 十二、用法门禁
 
-`scripts/logging/verify-log-usage.mjs` 扫描 `macos/Sources`、`rust/lithe-core/src`、`rust/lithe-agent-host/src`、`rust/lithe-git-host/src`、`rust/lithe-ide-host/src` 和 `rust/lithe-remote/src`。排除 `rust/lithe-remote/src/server/`、`rust/lithe-remote/src/bin/` 和 `rust/lithe-ide-host/src/bin/`：它们在远端主机或独立进程中运行，stderr 由宿主进程处理，以后单独迁移。
+`scripts/logging/verify-log-usage.mjs` 扫描 `macos/Sources`、`rust/lithe-core/src`、`rust/lithe-git-host/src`、`rust/lithe-ide-host/src` 和 `rust/lithe-remote/src`。排除 `rust/lithe-remote/src/server/`、`rust/lithe-remote/src/bin/` 和 `rust/lithe-ide-host/src/bin/`：它们在远端主机或独立进程中运行，stderr 由宿主进程处理，以后单独迁移。
 
 门禁只扫描生产代码：词法上遮蔽注释和字符串内容，排除 `Tests/`、`tests/`、`tests.rs`、文件名以 `_tests.rs` 结尾的 Rust 文件，以及明确标注 `#[cfg(test)]` 或 `#[cfg(all(test, …))]` 的项。它只检查列出的直接写法，不跨文件追踪别名或动态调用。规则分两类：