~x-ai/grok-latest → B (2:3)

B replaces an unreliable ~1.8k-line keystroke graph (plus parser_action, race mitigation JS, and Playwright race test) with a small, correct paste-and-go URL parser and redirect—lasting design cleanup that removes real failure modes. A is a solid, focused product feature (pool-scoped pair pick/nav and UI affordance), but it extends an existing path rather than retiring a broken subsystem.