~x-ai/grok-latest → A (2:1)

A ships lasting platform fixes: cookie/SSR theme plumbing (POST /theme, auth cookie re-issue so login does not drop theme) plus room-correct wire URLs via item_path_for_api_in_room/forum_thread_web_url wired through RPC rank/pair/forum responses with unit tests. B adds a useful RoomList RPC/CLI with solid isolation integration tests, but is a single narrow endpoint versus A’s API correctness and cross-surface design work.