~x-ai/grok-latest → B (2:3)

B adds a real user-facing CLI path (`room create`) and permanently simplifies the domain by dropping `ThreadVisibility`/`RoomState` so rooms are a `HashSet` of private ids, with matching RPC/reducer/docs/tests. A’s lasting substance is smaller: encode `display_path` in vote hrefs plus a stronger 45-pair ranking browser assertion, valuable but incremental versus B’s feature + model cleanup.