- io/fs.rs: 20 tests (path resolution, project open/close/get, known projects, model prefs, file read/write, list dir, validate path, scaffold) - io/shell.rs: 4 new tests (allowlist, command execution, stdout capture, exit codes) - http/workflow.rs: 8 tests (parse_test_status, to_test_case, to_review_story) Coverage: 28.6% → 48.1% Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>