Merge origin/master into PR #219 review branch

Bring PR #219 onto current master before re-evaluating review findings so fixes are tested against the code that would actually land.

Resolve generated catalogs by regeneration, preserve the new ACP tool-schema sidecar format while refreshing affected snapshots keylessly, and update the newly paired Chinese adding-a-tool document to match the background-task guidance. This keeps generated and bilingual artifacts authoritative instead of choosing one conflict side blindly.

tsconfig.base.json

@@ -47,6 +47,7 @@
         "./packages/fs/*/src",
         "./packages/skill/*/src",
         "./packages/compact/*/src",
+        "./packages/context/*/src",
         "./packages/guard/*/src",
         "./packages/subagent/*/src",
         "./packages/tasks/*/src",