Fix workspace context review findings

packages/fs/fs-local/README.md

@@ -12,7 +12,7 @@ await ctx.plugin(LocalFileSystem, { cwd: process.cwd() })
 
 ## Behavior
 
-- **`resolve(path, opts?)`** — a relative `path` resolves against `opts.cwd` when the caller supplies one (the model-facing tools pass the calling agent's session cwd — see [the per-session cwd RFC](../../../docs/rfc/implemented/architecture/2026-07-02-fs-per-session-cwd.md)), else `config.cwd` (default `process.cwd()`); an absolute `path` ignores both. The `targetKey` is the file's `realpath`, so two input paths reaching the same file through symlinks share one identity, and writes/edits land on the link target (preserving the link). A not-yet-existing path uses the realpathed parent directory plus basename when the parent exists; only an unresolvable parent falls back to the absolute path. `displayPath` is the absolute (un-resolved) path.
+- **`resolve(path, opts?)`** — a relative `path` resolves against `opts.cwd` when the caller supplies one (the model-facing tools pass the calling agent's session cwd — see [the per-session cwd RFC](../../../docs/rfc/implemented/architecture/2026-07-02-fs-per-session-cwd.md)), else `config.cwd` (default `process.cwd()`); an absolute `path` ignores both. `opts.signal` is checked before and after local resolution, while a remote sibling backend may use it to abort its round-trip. The `targetKey` is the file's `realpath`, so two input paths reaching the same file through symlinks share one identity, and writes/edits land on the link target (preserving the link). A not-yet-existing path uses the realpathed parent directory plus basename when the parent exists; only an unresolvable parent falls back to the absolute path. `displayPath` is the absolute (un-resolved) path.
 - **`stat`** — returns `FsInfo` (`version` = `mtimeMs:size`, `type` of `file`/`directory`/`other`, byte `size`) or `undefined` when the target is absent.
 - **`readText` / `streamText`** — UTF-8 only. `readText` reads the whole file; `streamText` streams it in chunks (cross-chunk decoding) so a huge file never has to be held whole in memory. Both reject invalid UTF-8 and NUL-byte binary samples (`FS_NOT_TEXT`) and non-regular targets. The `read` tool (`@deepseek-ai/dsh-tool-fs`) decides which to call by size and owns the line windowing.
 - **`listDir`** — lists one directory level in stable `name.localeCompare()` order. Each entry carries the child basename, type, resolved child target (`displayPath` under the listed directory, `targetKey` as the realpath identity), and cheap stat metadata (`version`, plus `size` for regular files). It never opens or decodes file contents. Missing targets report `FS_NOT_FOUND`, file/special-file targets report `FS_NOT_DIRECTORY`, aborted calls report `FS_ABORTED`, permission failures report `FS_PERMISSION_DENIED`, and other listing or child metadata I/O failures report `FS_IO_ERROR`. Broken/disappeared children are returned as `other` without metadata, but permission/IO failures while resolving a child fail the whole listing with a structured `FsError`.

packages/fs/fs-local/src/index.ts

@@ -107,8 +107,10 @@ export class LocalFileSystem extends FileSystem {
     }
   }
 
-  override async resolve(path: string, opts?: { cwd?: string }): Promise<FsTarget> {
+  override async resolve(path: string, opts?: { cwd?: string; signal?: AbortSignal }): Promise<FsTarget> {
+    if (opts?.signal?.aborted) throw new FsError('resolve aborted', 'FS_ABORTED')
     const local = await resolveLocalTarget(opts?.cwd ?? this.config.cwd, path)
+    if (opts?.signal?.aborted) throw new FsError('resolve aborted', 'FS_ABORTED')
     return { targetKey: local.targetKey, displayPath: local.displayPath }
   }
 

packages/fs/fs-local/tests/filesystem.spec.ts

@@ -73,6 +73,18 @@ describe('resolve', () => {
     const target = await fs.resolve(join(dir, 'abs.txt'), { cwd: '/nonexistent-base' })
     expect(await fs.readText(target)).toBe('absolute')
   })
+
+  it('honors a pre-aborted signal', async () => {
+    await expect(fs.resolve('a.txt', { signal: AbortSignal.abort() })).rejects.toMatchObject({ code: 'FS_ABORTED' })
+  })
+
+  it('honors a signal aborted while resolution is in flight', async () => {
+    const controller = new AbortController()
+    const pending = fs.resolve('a.txt', { signal: controller.signal })
+    controller.abort()
+
+    await expect(pending).rejects.toMatchObject({ code: 'FS_ABORTED' })
+  })
 })
 
 describe('stat', () => {