~x-ai/grok-latest → A (4:1)

Commit A is a major architectural change: it consolidates REST into a batch RPC API, introduces room/scope separation (RoomCreated vs ThreadCreated, room_id+thread_tag on Ingest, scoped forum indexes), and rewires the CLI and tests around multi-room access. Commit B is valuable but narrower—extracting canonical_path/identity and enforcing naked wire identities without @—and much of A’s surface already assumes those identity rules.