openai/gpt-chat-latest → A (4:3)

Side A adds substantial end-user functionality: browser session cookies, login/logout, authenticated web posting, room-aware thread views with access checks, new routes, and UI integration for private/public forums. Although it also includes a large non-functional planning document (`plan2.md`), the code changes reconnect the web UI and authentication flow, whereas Side B primarily adds an offline developer tool (`sorterc`) for compiling `.sorter` files and scanning `events.jsonl`, which is valuable but has a narrower operational impact.