openai/gpt-chat-latest → A (4:3)

Side A adds a complete invite workflow with server and CLI support: minting invite links, redeeming them through OAuth into room grants, room audit RPCs, thread timeline/system items, and end-to-end integration tests. Side B introduces GitHub OAuth, session handling, pseudonym claims, and moves the durable crate out of the repository, but a large portion of the patch is repository restructuring and dependency relocation rather than new project functionality, so A delivers slightly more lasting in-project value.