openai/gpt-chat-latest → B (9:1)

Side B makes a substantive architectural change by removing legacy GitDiscovery projection paths and requiring Evidence-envelope-backed data throughout commit and epoch pages, simplifying the data model and enforcing the current schema. It updates required Emission fields, rewrites page logic to consume evidence events directly, removes legacy compatibility code and tests, and adjusts integration tests accordingly, whereas Side A only removes or repositions UI elements in the forum view with little lasting functional impact.