fix: harden respect-staged pathspec handling

docs/CLI-TOOLS.md

@@ -426,7 +426,6 @@ node gsd-tools.cjs commit <message> [--files f1 f2] [--amend] [--no-verify] [--r
 ```
 
 > `--no-verify`: Skips pre-commit hooks. Used by parallel executor agents during wave-based execution to avoid build lock contention (e.g., cargo lock fights in Rust projects). The orchestrator runs hooks once after each wave completes. Do not use `--no-verify` during sequential execution — let hooks run normally.
-
 > `--files <paths>` **staging behaviour**: by default, `--files` runs `git add -- <path>` for each named file before committing. This overwrites any per-hunk staging set up via `git add -p`. Pass `--respect-staged` to skip the `git add` step and commit only what is already in the index within the requested pathspec. If nothing is staged within that scope, the command returns `{ committed: false, reason: 'nothing staged' }` without error. The trailing `-- <paths>` pathspec on the commit is applied under both modes, so files staged outside the `--files` scope are never included (#3061 invariant).
 
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sdk/src/query/commit.test.ts

@@ -436,6 +436,29 @@ describe('commit --respect-staged (#3522)', () => {
     expect(staged).toContain('out-of-scope.ts');
   });
 
+  it('treats directory pathspecs without trailing slash as directories under --respect-staged', async () => {
+    const { commit } = await import('./commit.js');
+
+    await writeFile(join(tmpDir, 'out-of-scope.ts'), '// out of scope\n');
+    execSync('git add .planning/config.json out-of-scope.ts', { cwd: tmpDir, stdio: 'pipe' });
+
+    const result = await commit(
+      ['feat: dir scope', '--files', '.planning', '--respect-staged'],
+      tmpDir,
+    );
+    expect((result.data as { committed: boolean }).committed).toBe(true);
+
+    const committedFiles = execSync('git show --name-only --format= HEAD', { cwd: tmpDir, encoding: 'utf-8' })
+      .trim()
+      .split('\n')
+      .filter(Boolean);
+    expect(committedFiles).toContain('.planning/config.json');
+    expect(committedFiles).not.toContain('out-of-scope.ts');
+
+    const staged = execSync('git diff --cached --name-only', { cwd: tmpDir, encoding: 'utf-8' }).trim();
+    expect(staged).toContain('out-of-scope.ts');
+  });
+
   it('without --respect-staged, --files re-stages the full file even when partially pre-staged (back-compat)', async () => {
     const { commit } = await import('./commit.js');
 

sdk/src/query/commit.ts

@@ -177,20 +177,42 @@ export const commit: QueryHandler = async (args, projectDir, workstream) => {
   // causes `git diff --cached` to exit non-zero with "pathspec did not match".
   // To avoid that, get all staged files and filter by the requested paths in
   // TypeScript instead.
-  const stagedFiles: string[] = (() => {
+  const stagedFilesResult: { files: string[] } | { error: { reason: string; exitCode: number } } = (() => {
     if (hasRespectStaged) {
       const allStaged = execGit(projectDir, ['diff', '--cached', '--name-only']);
+      if (allStaged.exitCode !== 0) {
+        return {
+          error: {
+            reason: allStaged.stderr || allStaged.stdout || 'failed to inspect staged files',
+            exitCode: allStaged.exitCode,
+          },
+        };
+      }
       const allStagedFiles = allStaged.stdout ? allStaged.stdout.split('\n').filter(Boolean) : [];
-      // Build a Set of the requested paths for O(1) lookup.
-      const pathSet = new Set(pathsToCommit);
-      // For directory entries (e.g. '.planning/'), match by prefix.
-      return allStagedFiles.filter(f =>
-        pathSet.has(f) || pathsToCommit.some(p => p.endsWith('/') && f.startsWith(p)),
-      );
+      const normalizePathspec = (p: string) => p.replace(/\\/g, '/').replace(/\/+$/, '');
+      const normalizedSpecs = pathsToCommit.map(normalizePathspec);
+      return {
+        files: allStagedFiles.filter(file => {
+          const normalizedFile = normalizePathspec(file);
+          return normalizedSpecs.some(spec => normalizedFile === spec || normalizedFile.startsWith(`${spec}/`));
+        }),
+      };
     }
     const diffResult = execGit(projectDir, ['diff', '--cached', '--name-only', '--', ...pathsToCommit]);
-    return diffResult.stdout ? diffResult.stdout.split('\n').filter(Boolean) : [];
+    if (diffResult.exitCode !== 0) {
+      return {
+        error: {
+          reason: diffResult.stderr || diffResult.stdout || 'failed to inspect staged files',
+          exitCode: diffResult.exitCode,
+        },
+      };
+    }
+    return { files: diffResult.stdout ? diffResult.stdout.split('\n').filter(Boolean) : [] };
   })();
+  if ('error' in stagedFilesResult) {
+    return { data: { committed: false, ...stagedFilesResult.error } };
+  }
+  const stagedFiles = stagedFilesResult.files;
   if (stagedFiles.length === 0) {
     return { data: { committed: false, reason: 'nothing staged' } };
   }