openai/gpt-chat-latest → B (4:1)

Side B introduces a foundational API redesign by replacing many individual endpoints with a typed RPC batch interface, refactoring the reducer and event model from thread-centric to room/scope-aware data, and updating the CLI and tests to use the new architecture. Side A is a well-executed feature that adds pool-scoped voting, including `pool` query handling, UI links, and context-preserving navigation, but it builds on the existing system rather than reshaping core infrastructure.