openai/gpt-chat-latest → B (4:1)

Side B adds durable infrastructure: explicit user-triggered entity fetching, event-sourced persistence of full imported API payloads (`EntityImported`), replay support, configurable Reddit API/OAuth endpoints, and UI/server plumbing for fetch actions with tests. Side A mainly removes a complex autocomplete system in favor of a simpler paste-and-go flow and URL parser, which simplifies the codebase but also drops significant functionality rather than adding comparable long-term capability.