[
  {
    "path": "docs/migration-checklist.md",
    "category": { "class": "stale", "subtype": "completed-in-place" },
    "signals": [
      { "name": "archive_to_live_ratio", "detail": "92% of content is under archive/resolved/completed headings" }
    ],
    "op": "Stamp the completed checklist with 'hygiene: frozen' frontmatter so the finished record is not re-flagged each scan.",
    "op_type": "deterministic",
    "exact_edit": {
      "kind": "insert-frontmatter",
      "key": "hygiene",
      "value": "frozen"
    },
    "gloss": "Every item is closed; the doc is a finished record completed in place — freeze rather than delete history."
  }
]