Phase 1 = console-only round carousel (relay door mode, no new zip);
Phase 2 = true drop-in (engine make re-send on late PEER_UP), gated on a
2-node spike. No code modified -- plan for the next work session.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0166KTsC7ADm7VXEi1HF1jNg
