openai/gpt-chat-latest → A (4:3)

Side A implements a substantial new room invitation and access-management workflow end to end: RPCs for minting invites and auditing grants, `/join/:token` redemption integrated into OAuth, capability grants, CLI support, new tests, and related API/type changes. Side B makes an important architectural improvement by making UUIDs the canonical identity and adding Reddit OAuth linking, but A delivers a broader user-facing capability with server, client, routing, state, and integration-test coverage despite some invite state remaining ephemeral.