openai/gpt-chat-latest → A (4:1)

Side A adds substantial, lasting functionality: an extensible external URL foundation with GitHub resolvers, on-demand system ingests (`SystemIngest`), resolver cooldowns, URL normalization improvements, UI actions, and tests, creating reusable infrastructure rather than isolated features. Side B does introduce GitHub OAuth, pseudonym/session handling, and identity events, but a large portion of its patch is moving the `durable` crate out of the repository and deleting in-tree code, which is more project reorganization than enduring product capability.