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

Side A fixes a real, self-contained bug (pinned posts polluting ranked imports) with a clear implementation and a targeted regression test. Side B is a fragile fix-up that switches a fallback default to a panic (`.expect(...)`) on missing data, which risks introducing crashes on malformed/edge-case input rather than clearly improving correctness, and mostly consists of doc-comment tweaks and index-off-by-one churn.