~x-ai/grok-latest → B (1:3)

B restores core product surface area: browser session cookies, login/logout, web ingest posting, and full public/private room thread navigation with ACL checks and compose forms, turning unwired server routes into a usable room UI. A is a solid but narrower tooling fix—fast parse-only scan, richer parse_error reporting, and compile --ingest—valuable for offline logs yet secondary to shipping the multi-room web experience.