ADR 0034: SIL.TextEditing moves into Motif as a sealed folder

AGENTS.md

@@ -12,7 +12,8 @@
   - `src/SIL.TextEditing.Markdown` has no Avalonia, libpalaso or liblcm reference.
   - `src/SIL.TextEditing.LCModel` references liblcm and is not trimmable or AOT-compatible; keep it out of `tests/AotCheck`.
 - **One source tree, two Avalonia versions.** netstandard2.0 builds against Avalonia 11.3.17 (FieldWorks, net48);
-  net10.0 builds against Avalonia 12 (Motif). Versions live in `Directory.Packages.props` only. A per-target
+  net10.0 builds against Avalonia 12 (Motif). Versions live in `Directory.Packages.props` only (from the move into Motif, SIL package versions come from Motif's
+  `SilVersions.props`, ADR 0034). A per-target
   difference goes behind `#if NET10_0_OR_GREATER`, is small, and is listed in `docs/reference/avalonia-versions.md`.
 - **Packages.** Only SIL.WritingSystems (libpalaso, ADR 0002; referenced by the Avalonia and LCModel projects), Avalonia (and its Headless, Skia, Desktop, Themes.Fluent and Win32.Interoperability packages; Themes.Fluent and Win32.Interoperability are samples-only; Desktop is for samples and test projects that need a real window, never for a shipped library), SIL.LCModel.Core (FieldWorks' pin; referenced by `SIL.TextEditing.LCModel`, ADR 0016) and SIL.LCModel (FieldWorks' pin, hosts may float up; referenced by the planned `SIL.TextEditing.Project` only, ADR 0031), Markdig.Signed 0.37.0 (referenced by the `SIL.TextEditing.Markdown` project only, ADRs 0011 and 0028), YamlDotNet 18.1.0 (its parser layer only, never the reflection serializer; referenced by the `SIL.TextEditing.Markdown` project only, ADR 0032) and the
   xunit test stack. Ask before adding anything else.

Directory.Packages.props

@@ -26,7 +26,7 @@
     <PackageVersion Include="Avalonia.Win32.Interoperability" Version="$(AvaloniaV11)" />
   </ItemGroup>
 
-  <!-- FieldWorks pins this libpalaso version (ADR 0002); hosts may float up. -->
+  <!-- FieldWorks pins this libpalaso version (ADR 0002); hosts may float up. From the move into Motif, SilVersions.props (ADR 0034). -->
   <ItemGroup>
     <PackageVersion Include="SIL.WritingSystems" Version="18.0.0-beta0042" />
   </ItemGroup>
@@ -35,7 +35,7 @@
     <PackageVersion Include="Microsoft.NETFramework.ReferenceAssemblies" Version="1.0.3" />
   </ItemGroup>
 
-  <!-- FieldWorks pins this LCModel version (ADR 0016); hosts may float up. -->
+  <!-- FieldWorks pins this LCModel version (ADR 0016); hosts may float up. From the move into Motif, SilVersions.props (ADR 0034). -->
   <ItemGroup>
     <PackageVersion Include="SIL.LCModel.Core" Version="$(SilLcmVersion)" />
   </ItemGroup>

GLOSSARY.md

@@ -130,3 +130,20 @@ _Avoid_: model (that is liblcm's), JSON Schema (that is what the record schema p
 **Body field**:
 The one rich field of a record kind written as the Markdown body below the front matter, such as a notebook record's description. A lexical entry has none.
 _Avoid_: main field, content
+
+## Repository
+
+**Sealed folder**:
+SIL.TextEditing as one folder inside a host repository (first `textediting/` in Motif), with its own build, solution,
+tests and documents. The host references into it; it references nothing outside itself except the host's shared-settings
+file and `SilVersions.props` (ADR 0034).
+_Avoid_: subtree, submodule, vendored copy
+
+**Avalonia line**:
+One of the two builds of every library: netstandard2.0 with Avalonia 11.3 (FieldWorks on .NET Framework 4.8), or
+net10.0 with Avalonia 12 (Motif) (ADR 0009).
+_Avoid_: flavour, variant
+
+**Pull out**:
+Copy the sealed folder into another repository (its own again, or FieldWorks) and make it build there (ADR 0034).
+_Avoid_: migrate back, extract

docs/adr/0002-writing-systems-from-libpalaso.md

@@ -10,7 +10,8 @@ the wheel."
 **Consequences:** the package depends on libpalaso, and through it on ICU. Its versions must match what FieldWorks and
 Motif pin, and the net10.0 build must stay trimmable and AOT-compatible.
 
-- The minimum version is FieldWorks' pin, 18.0.0-beta0042; hosts may float up.
+- The minimum version is FieldWorks' pin, 18.0.0-beta0042; hosts may float up. From the move into Motif (ADR 0034), the
+  version comes from Motif's `SilVersions.props` instead.
 - A libpalaso trim or AOT warning is fixed upstream. libpalaso takes pull requests from us, through its normal review.
 - Until that fix is released, the warning is suppressed by its ID, with a comment that links the libpalaso pull request.
 - The suppression is removed when the minimum version is raised to the fixed release.
@@ -19,3 +20,6 @@ Owner decision, 2026-11-03.
 
 Amended 2026-11-04: the Markdown converter does not reference libpalaso. It identifies writing systems by language tag
 and takes each one's language, direction and font from the file's front matter (ADR 0028).
+
+Amended by ADR 0034 (2026-11-06): from the move into Motif, SIL package versions follow Motif's `SilVersions.props`, not
+FieldWorks' pins. The netstandard2.0 / Avalonia 11.3 line is the compatibility promise to FieldWorks.

docs/adr/0016-lcmodel-adapter-package.md

@@ -30,3 +30,7 @@ Amended 2026-11-05 (issue 139): liblcm also refuses some values of properties it
 - Not refused: a colour out of range and a negative relative line height (read as its absolute value) load, changed. A `-1` variation with a `-1` value is a delete to the property builder, so nothing reaches liblcm. The writing system (1) and base writing system (16) depend on the host's handles and are not judged here.
 - The packed-value check (147, 156) asks liblcm to write, read and save the value through a permissive writing-system shim, where every handle names a writing system. It judges the shape of the record only. A real project's writing-system factory may refuse a writing system it does not know, so a packed value that passes here can still fail to load in a project that lacks that writing system; the adapter cannot know the project's writing systems.
 - `LiblcmRefusals` and `Refusal` are internal. The public surface is `TsStringConversion.IsRefusedByLiblcm` (the one number check), `DroppedProperty`, `DroppedReason` and the `OnDropped` callbacks. The sweep covers object-data type characters 0 to 255 and reports every mismatch.
+
+Amended by ADR 0034 (2026-11-06): from the move into Motif, `SIL.LCModel.Core` and `SIL.LCModel` follow Motif's
+`SilVersions.props`, not FieldWorks' pin, here and in the ADR 0031 amendment above. The netstandard2.0 / Avalonia 11.3
+line is the compatibility promise to FieldWorks.

docs/adr/0031-shared-editing-and-interchange-layer.md

@@ -56,3 +56,7 @@ Motif it is Proposals, MCP, the GDR template and checker, and the AI-authoring p
   the text. Design pending in research report 19.
 
 Owner decision, 2026-11-05.
+
+Amended by ADR 0034 (2026-11-06): from the move into Motif, `SIL.LCModel` (R-1 and the consequences above) follows Motif's
+`SilVersions.props`, not FieldWorks' pin. Motif is MIT, so that move is not the "repositories merge" of Q60: the library
+stays MIT and clean-room (ADR 0010).

docs/adr/0034-moves-into-motif-as-a-sealed-folder.md

@@ -0,0 +1,72 @@
+# SIL.TextEditing moves into Motif as a sealed folder that can be pulled out again
+
+SIL.TextEditing is copied into the Motif repository (`sillsdev/motif`) as one folder, `textediting/`, in a single import
+commit. It keeps its own build and its two Avalonia lines. It can then be pulled out again by copying the folder, either
+back into its own repository or straight into FieldWorks.
+
+**The rules for `textediting/`:**
+
+- **Sealed, one way.** Motif projects may reference projects inside `textediting/`. Nothing inside it references a file
+  outside it, with two exceptions: the shared-settings file and Motif's `SilVersions.props`, both at the Motif root. A
+  check (a test or a CI step) allows exactly those two and fails on any other path that leaves the folder.
+- **Its own build environment.** `textediting/` has its own `Directory.Build.props`, `Directory.Packages.props`,
+  `SIL.TextEditing.sln`, tests, samples and conformance fixtures. MSBuild uses the nearest of these files. Motif's root
+  build therefore never reaches the folder. That build has one shared `bin` folder, a forced runtime identifier,
+  implicit usings, a dependency-injection package on every project and `Product=Motif`.
+- **Two Avalonia lines, as before (ADR 0009).** netstandard2.0 builds against Avalonia 11.3 for FieldWorks on .NET
+  Framework 4.8. net10.0 builds against Avalonia 12 for Motif. Both Avalonia versions stay in the folder's own
+  `Directory.Packages.props`.
+- **Shared settings.** Motif moves the settings both sides want into one common file: language version, nullable,
+  warnings as errors and deterministic builds. `textediting/Directory.Build.props` imports it. Implicit usings,
+  `Product` and the output layout stay out of the common file.
+- **SIL packages track Motif.** FieldWorks can raise SIL package versions easily. What it cannot do easily is move from
+  .NET Framework 4.8 to .NET 10, or from Avalonia 11 to 12. So the folder keeps the netstandard2.0 and Avalonia 11 line
+  until FieldWorks moves. Its SIL package versions, however, come from Motif's `SilVersions.props`:
+  - `textediting/Directory.Packages.props` imports `SilVersions.props`.
+  - It maps `SilLibPalasoVersion` to `SIL.WritingSystems`, and `SilLCModelPackageVersion` to `SIL.LCModel.Core` and
+    `SIL.LCModel`.
+  - The local override `-p:SilLcmVersion` gives way to Motif's `LOCAL_NUGET_REPO` mechanism. The folder needs its own
+    copy of that, because it lives in Motif's root `Directory.Build.props`.
+  - At the move, a build checks that those versions restore for netstandard2.0 and net48.
+- **Its own gate.** A Windows CI job, filtered to `textediting/**`, does what this repository's CI does:
+  - builds both lines;
+  - runs the net10.0 and net48 tests of `SIL.TextEditing.sln`;
+  - publishes `tests/AotCheck` with native AOT.
+
+  Motif's cross-platform matrix and `test.ps1` do not run these. The workflow file moves out with the folder.
+- **Its own documents.** `textediting/docs/adr` keeps this numbering, from 0001, along with `GLOSSARY.md`, `AGENTS.md`
+  and `docs/`. Motif records its side of the boundary in an ADR of its own, in the first Motif pull request of the move.
+- **Names do not change.** Projects, namespaces and package ids stay `SIL.TextEditing.*`. FieldWorks code written
+  against them needs no change when the folder is pulled out.
+- **Still MIT and clean-room (ADR 0010).** No FieldWorks code is copied into the folder. Motif is MIT, so this move is
+  not the "repositories merge" that ADR 0031 and its Q60 mention.
+
+**Pulling it out again**, into its own repository or into FieldWorks:
+1. Copy `textediting/`.
+2. Replace both imports with the same few lines, inline.
+3. Take the CI job along.
+4. Point the SIL package versions at the destination's own pins.
+
+History stays in Motif. The import commit names the SIL.TextEditing commit it came from.
+
+**The old repository:**
+- Open issues move to `sillsdev/motif` with `gh issue transfer`. A `textediting` label is created there first.
+- Transferred issues get new numbers. GitHub redirects the old links, so the issue numbers cited in these documents
+  still resolve.
+- Open pull requests cannot be transferred. They are merged or closed before the copy.
+- The repository gets a README that points at `motif/textediting`. It is archived, not deleted, so it can be unarchived
+  if the code moves back.
+
+**At the move**, these change from "FieldWorks' pin" to "Motif's `SilVersions.props`":
+- `AGENTS.md`: the layering and package bullets.
+- the pin comments in `Directory.Packages.props`;
+- ADR 0002;
+- ADR 0016;
+- ADR 0031, at R-1 and in its consequences.
+
+**Consequences:**
+- Amends ADR 0002, ADR 0016 and ADR 0031 from the move onwards. Their "FieldWorks' pin" wording holds until then.
+- ADR 0009 and ADR 0010 stand.
+- History from before the move stays in the archived repository. Motif has no subtree history.
+
+Owner decision, 2026-11-06.