~x-ai/grok-latest → A (3:1)

Commit A replaces an unreliable ~1800-line keystroke graph parser (plus parser_action, race-prone JS, and Playwright test) with a correct ~87-line paste-and-go URL extractor and redirect, delivering lasting simplicity and a real reliability fix. Commit B re-wires room/forum UI, cookie sessions, and compose forms—valuable product surface—but is largely restoration/plumbing plus a long speculative plan2.md, so less durable design improvement per line.