What problem does it solve? Backlogs accumulate stale items: work silently completed by later epics, duplicates of other items, and entries whose premise no longer exists. This Skill audits each BACKLOG item's claim against the actual repository state so only genuinely valid work survives to refinement. ## Core Features & Use Cases - Evidence-based verdicts: Checks each item's testable claim against the tree at HEAD, git history, and ADRs, then rules STILL-VALID, ALREADY-DELIVERED, PARTIAL, DUPLICATE, OBSOLETE, DECISION-ONLY, TRIGGER-GATED, or PRODUCT-BET with one line of evidence per verdict. - Gated status flips: Terminal status changes (done, duplicate, wontfix, archived) require evidence plus operator confirmation, while annotations and partial-delivery notes are written directly into item files. - Audit report generation: Writes a dated triage report with verdict summary, merge groups, decisions owed, and a refinement shortlist with DoR gaps. - Use Case: Run a full-corpus triage of all not-started backlog items before a planning cycle to retire stale entries, merge duplicates, and produce a shortlist ready for refinement. ## Quick Start Triage every not-started item in the backlog and tell me which ones are still valid, already delivered, or should be retired.