openai/gpt-chat-latest → B (5:1)

Side B changes the ranking algorithm itself from contributor-level comparisons to pairwise ranking of every eligible commit, adds commit-level evidence and rollup logic, updates UI/evidence pages to expose per-commit rankings, and fixes the short-circuit so multiple commits by one contributor are still evaluated. Side A is a broad DSL syntax migration (leading explanation blocks and title-first items) with parser rewrites and widespread fixture updates, but it primarily changes input format rather than adding comparable lasting system capability.