~x-ai/grok-latest → B (1:6)

B is a foundational redesign: it collapses scattered REST handlers into a batch RPC API, splits rooms from forum threads in the event/reducer model (room_id + thread_tag, ScopeId::Room, grants on rooms), and rewires CLI and tests around that model. A is a solid, complete UX feature (pool-scoped /vote and next-pair navigation) but stays local to the garden vote UI and does not reshape core product architecture the way B does.