What problem does it solve? Large GitHub project boards accumulate stale issues, duplicate clusters, and hygiene problems that per-issue review skills never catch. This Skill reviews the entire open issue pool as a system, verifying every claim against the repository before proposing closures, labels, or corrections. ## Core Features & Use Cases - Obsolescence Detection: Runs eight checks per issue — merged PRs, passing tests, missing cited files, closed blockers, drifted measurements, and code that exists only on unmerged branches. - Cluster Management: Groups issues by shared fix site, gate, or decision, maintains cluster:* labels, and tracks each cluster's next action with a doer and date. - Board Hygiene & Paid-Run Tax: Reports closed issues in active columns, unlabeled items, stalled work, and the eval re-run cost of queued skill edits. - Use Case: Run weekly after merging duplicates and before ranking the backlog, so the board's premises are verified and dead items are dropped before planning. ## Quick Start Ask the assistant to audit the board and report which open issues are obsolete, where the clusters are, and what cross-cutting handling beats the per-issue plans.