openai/gpt-chat-latest → A (3:2)

Side A delivers a substantial functional expansion by introducing separate fetch modes for entities versus children, wiring the new fetch kind through the UI, SSE pipeline, Reddit worker, state management, and adding child-import parsing/linking plus updated ranking behavior for imported children. Side B makes an important API/security improvement by scoping feed retrieval to authenticated delegates and adding authorization checks and tests, but it is narrower in scope than A's end-to-end feature and architectural changes.