The room-guest light learns which session it lives in: distnoted doesn't reliably carry a distributed notification from an ssh login session into the Aqua session — which is exactly where a room receiver runs — so the CLI now heartbeats /tmp/ac-room-guest.json every 5 s (unlinked on exit, staleness covers SIGKILL) and Menu Band polls the file's freshness instead of listening for a post: fresh beacon spins the Juke disc as 'room RIGHT ← neo' and fires one banner per engagement announcing which channel this Mac just became master