~x-ai/grok-latest → A (3:2)

Commit A lands the end-to-end private room create path (CLI RoomCmd + RPC usage) and a lasting domain cleanup (drop ThreadVisibility, rooms as HashSet) with docs and tests aligned. Commit B is a large, well-structured Reddit fetch worker, but it is a peripheral import path still marked incomplete (rendering etc. in todo), so it adds less durable product core than A.