~x-ai/grok-latest → B (3:1)

B replaces an unreliable ~1800-line keystroke graph parser (plus parser_action, race-handling JS, and Playwright test) with a small paste-and-go URL extractor and redirect, permanently removing a complex failure-prone subsystem. A is a sound but narrower design change (Deque→List, write-time trim→read-time cap) in the projection path; valuable, yet secondary to B’s net simplicity and correctness gain on a core user flow.