~anthropic/claude-sonnet-latest → A (6:4)

Side A implements a substantial, functional feature: cookie-based session auth, private room routing/permissions, a web-based posting endpoint reusing the RPC core, and refactored thread navigation supporting both public and room scopes — real, load-bearing architecture. Side B is a much smaller UX polish (inline form morphing instead of redirect) that's useful but narrow in scope, and both patches include some noise (A's odd plan2.md prose file; B's AI co-author tag), but A's changes deliver far more lasting functional value.