~x-ai/grok-latest → A (3:1)

A lands a lasting core design: simplifies rooms to a HashSet of private ids, drops ThreadVisibility from events/reducer/RPC, and adds the real CLI `room create` path with docs and tests. B only extends Reddit entity parsing/UI (thumbs, image_url/link_url, render helpers, CSS)—useful polish for one import source, but not architectural.