~x-ai/grok-latest → A (3:1)

A introduces a real settlement worker (batched votes, disk append, off-request ranking recompute), a cached ranked_items fast path with read locks, and deletes the demo-counter scaffold end-to-end—core architecture for the ranking product. B is a solid, narrower production fix (force OAuth when creds exist, refresh on 401/403, error truncation, fly base URL) but does not reshape the system the way A does.