{
  "schemaVersion": "crawler-atlas-1",
  "atlasVersion": "atlas-2026-07-28-v1",
  "canonical": "/atlas/content-freshness",
  "title": "Content freshness",
  "category": {
    "slug": "quality",
    "title": "Quality, provenance, and observability"
  },
  "definition": "Content freshness describes when meaningful facts were last reviewed or changed.",
  "mechanism": "Accurate page versions, content hashes, Last-Modified values, and sitemap lastmod dates let recrawlers distinguish real updates from cosmetic deployments.",
  "validation": "Hash normalized content, record the editorial update separately from deployment time, and submit only materially changed canonical URLs.",
  "commonFailure": "Resetting every date on every deploy creates a false freshness signal and consumes crawl quota without adding information.",
  "related": [
    "/atlas/conditional-requests",
    "/atlas/provenance"
  ],
  "modified": "2026-07-28"
}