~x-ai/grok-latest → B (2:3)

B fixes real feed catch-up correctness and privacy bugs by anchoring on durable ingest order (not ms timestamps) and enforcing multi-user private-room visibility, backed by focused integration tests for collisions, clock rollback, and revoked grants. A is a broad worthwhile split of path vs identity and strict no-@ wire form, but much of the diff is module moves, call-site churn, and API convention updates rather than new behavioral guarantees.