The 1995 engine tolerates late HOST attach but never finished late ENTITY
sync (NotifyOfReplacementEntityCreation = Fail stub, makes broadcast-once).
Routes to docs/REVOLVING_DOOR_PLAN.md.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0166KTsC7ADm7VXEi1HF1jNg