~x-ai/grok-latest → A (3:1)

A ships the end-to-end room-create path (CLI command, RPC, docs) and a lasting domain simplify—dropping ThreadVisibility/RoomState so rooms are a HashSet of private ids—with matching tests. B’s useful browse `/~/` URL helpers are real, but much of the patch is theme/cookie/CSS deletion and routing cleanup, which is less core product value.