openai/gpt-chat-latest → B (6:5)

Side B replaces GitHub API-based commit discovery with deterministic multi-repository Git graph discovery, adding replayable `GitDiscovery` snapshots, patch-identity deduplication, repository/ref configuration, locking, and extensive adversarial/stateful tests that strengthen attribution correctness over time. Side A adds valuable URL normalization, an on-demand GitHub external resolver, system ingests, and UI support, but much of it is feature expansion, whereas Side B establishes a more durable foundation for reproducible ownership allocation and replay semantics.