Make MCP coverage reports cover the whole evergreen PR

.github/prompts/update-mcp-coverage.md

@@ -8,7 +8,9 @@ Do not downgrade or change that version.
 ## Audit and implement
 
 1. Read `$RUNNER_TEMP/sdk-diff.patch`, `../sdk/api.md`, and the parameter types in
-   `../sdk/src/resources`. Enumerate SDK methods and their parameters, including
+   `../sdk/src/resources`. The diff covers every release since the SDK version on
+   origin/main, so earlier runs may already have covered part of it on this branch.
+   Enumerate SDK methods and their parameters, including
    nested options, new enum values, pagination, streaming, and changed signatures.
 2. Read `src/lib/mcp/register.ts`, `src/lib/mcp/tools/`, and shared MCP schemas.
    Map SDK methods/parameters to registered MCP tools, actions, and input fields.
@@ -31,10 +33,15 @@ Do not downgrade or change that version.
 
 The Kernel API spec as of this SDK release is at
 `$RUNNER_TEMP/kernel-api/packages/api/openapi.yaml`, and `$RUNNER_TEMP/openapi-diff.patch`
-shows spec changes between the previous SDK release and this one. The SDK is generated
+shows spec changes between origin/main's SDK release and this one. The SDK is generated
 from this spec, so its endpoint, parameter, and schema descriptions are the source of
 truth for what the API does.
 
+The spec is taken from the API's main branch at release time and can be ahead of the
+released SDK. The SDK defines what exists: never add tools, actions, or inputs for
+operations or fields `../sdk` does not have. Use the spec only for the meaning of
+things the SDK has.
+
 1. For every changed `summary` or `description` in the spec diff that belongs to an
    endpoint, parameter, or field the MCP server exposes, update the matching tool
    description, action description, or input `.describe()` text. Use the spec text
@@ -68,7 +75,9 @@ unrelated code, workflows, generated App bundles, or authentication configuratio
 Read the complete diff against origin/main before finishing. Remove unnecessary
 comments, type casts, defensive wrappers, and unrelated changes.
 
-Write `$RUNNER_TEMP/mcp-coverage-report.md` with concise sections describing:
+Write `$RUNNER_TEMP/mcp-coverage-report.md`. It replaces the PR description, so it
+must describe every change in the diff against origin/main, including changes earlier
+runs left on this branch, not only this run's. Use concise sections describing:
 
 - Added or updated MCP tools, actions, and fields, with their SDK counterparts.
 - Descriptions updated to match spec changes, with the spec operation or field each

.github/workflows/update-mcp-coverage.yml

@@ -147,11 +147,15 @@ jobs:
             exit 0
           fi
 
+          # The report replaces the PR description, so audit every release since
+          # main's SDK version, not only the ones since the last run.
+          old_version=$(git show origin/main:package.json | jq -er '.dependencies["@onkernel/sdk"]')
           if git -C ../sdk rev-parse --verify "refs/tags/v$old_version" >/dev/null 2>&1; then
-            git -C ../sdk diff "refs/tags/v$old_version" "$SDK_SHA" -- api.md src/resources > "$RUNNER_TEMP/sdk-diff.patch"
+            git -C ../sdk diff "refs/tags/v$old_version" "$SDK_SHA" \
+              -- api.md src/client.ts src/lib src/resources > "$RUNNER_TEMP/sdk-diff.patch"
             echo "old_date=$(TZ=UTC git -C ../sdk log -1 --date=format-local:%Y-%m-%dT%H:%M:%SZ --format=%cd "refs/tags/v$old_version")" >> "$GITHUB_OUTPUT"
           else
-            printf 'Baseline %s unavailable; audit all of api.md and src/resources.\n' "$old_version" > "$RUNNER_TEMP/sdk-diff.patch"
+            printf 'Baseline %s unavailable; audit all of api.md, src/client.ts, src/lib, and src/resources.\n' "$old_version" > "$RUNNER_TEMP/sdk-diff.patch"
           fi
           echo "new_date=$(TZ=UTC git -C ../sdk log -1 --date=format-local:%Y-%m-%dT%H:%M:%SZ --format=%cd "$SDK_SHA")" >> "$GITHUB_OUTPUT"
           echo "update=true" >> "$GITHUB_OUTPUT"