17 new tests covering the find-browse priority chain across
.codex, .agents, and .claude markers:
- Path construction correctness for all 3 markers
- Workspace-local vs global fallback ordering
- Missing binary at marker path (dir exists, binary doesn't)
- Symlink resolution through marker paths
- stderr for errors, stdout for output (no corruption)
- Codex skill generation consistency (prefixed, no .claude paths)
- Claude/Codex skill count parity