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  "priorEvidenceReused": "Original262node/147number/49group author inventory independently recomputed in content-parity.json. Prior contrast/font-fallback/27thin-title-growth fixture checks remain inherited and explicitly labelled; fresh integrated main/boundary/growth/noJS/native sandbox tests recorded separately.",
  "decodedPixelEqualCount": 8,
  "note": "Eight Changelog/Migration captures have exactly equal decoded pixels despite different PNG encoding. Four Runbook differences are wholly confined to the single authorized sentence rectangle; all dimensions and every other pixel match. Both are Chromium evidence, not a cross-engine certification."
}