Backlog Triage

Open-issue grooming as a two-phase loop:

Phase 1 — Report (advisory)          Phase 2 — Apply (explicit)
  collect → relate → stale              review report → --apply
      ↓                                       ↓
  single markdown report                gh mutations via anchors

Sibling skill to dev-backlog, not a replacement. dev-backlog is the execution hub (sprints, progress, milestones). backlog-triage is advisory: it inspects the open issue set and proposes changes. You decide; it applies only what you've approved.

Two-Phase Model

Phase 1 — Report (default, no mutations)