~x-ai/grok-latest → A (4:1)

A replaces an unreliable ~1.8k-line keystroke graph, action types, race harness, and live-complete UI with a small paste-and-go URL parser plus redirect—lasting design simplification and a real product path. B only repairs OAuth/E2E mocks (split regex, request body, nil-safe token/state, CSS selectors), which restores tests but is narrower and non-product.