Merge-workspace review loop (--all-reviewer): round 1 (@d198dd5) claude agy PASS, grok codex NOT PASS (the same inherited WORKSPACE_ROOT in eleven more modules; test_orc_onboard's import-time env); fixed in8b47cc7. Round 2 claude grok NOT PASS (test_o2_race_free_lock, test_o1_rebuttal missed), agy codex PASS; fixed inac48cb7. Round 3 (@ac48cb7) 4/4 PASS. Full suite atac48cb7on macOS / Python 3.9 / herdr 0.9.3 with WORKSPACE_ROOT set to an empty sentinel: 1751 passed / 0 failed / 38 skipped; the sentinel stayed empty and the main checkout's shim was not touched. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff