openai/gpt-5.2-chat → A (9:1)

Commit A introduces a comprehensive, deterministic multi-repository Git discovery and attribution system with global OID and patch-identity deduplication, snapshotting, concurrency control, emission integration, and extensive real-Git integration and stateful tests. It substantially reshapes core architecture (discovery events, ranking/emission coupling, locking, config normalization, replay guarantees) and adds large, rigorous test coverage. Commit B primarily restructures the CLI (renaming/reshaping commands, especially around forum vs ingest) and updates docs/tests to match, which is meaningful but largely interface-level refactoring without comparable backend complexity or new guarantees. The architectural depth and verification surface of A far exceed B.