claude, agy, grok: PASS with amendments; codex: NOT PASS (recipe overstates
current env-override support; review identity and lifecycle ownership
underspecified). Direction (creator per worktree, shared reviewer pool)
agreed by all four.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VCgu9Fa9iT7TbJUSzdq4Ff
