~anthropic/claude-sonnet-latest → A (6:4)

Commit A is a small, precise correctness fix that prevents ghost items and incorrect voted_pairs state from a real reducer bug, with an updated test verifying the fix. Commit B adds a large new dev-only tool (sorterc) which is useful but is auxiliary tooling rather than a core correctness fix, and its value is more speculative/utility-based than a guaranteed bugfix.