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  "mirrors": {
    "state": "unavailable",
    "note": "not looked up by artifact discovery — read the dedicated endpoint; absence here is not evidence of absence",
    "readEndpoint": "https://offdiagonal.space/api/public/v1/corpus/snapshots"
  },
  "mirrorNote": "mirrors deliver the identical snapshot; the authoritative record lives here and is never modified by a publish",
  "externalDatasetReferences": {
    "state": "unavailable",
    "note": "not looked up by artifact discovery — read the dedicated endpoint; absence here is not evidence of absence",
    "readEndpoint": "https://offdiagonal.space/api/public/v1/external/datasets"
  },
  "upstreamEvidence": {
    "source": "notflat.world",
    "state": "unavailable",
    "note": "not looked up by artifact discovery — read the dedicated endpoint; absence here is not evidence of absence",
    "receiptsHeld": null,
    "fusedIntoLedger": null,
    "ledgerFilter": "gateway = 'notflat.world'",
    "channelNamespace": "nfw_<domain>_<unit> — upstream quantities are namespaced so they are never pooled with our own channels",
    "lastIngestRun": null,
    "claims": "the upstream platform's own scorecards are served separately at /api/public/v1/upstream/scorecards and are never merged with scores computed here",
    "readEndpoints": [
      "https://offdiagonal.space/api/public/v1/upstream/receipts",
      "https://offdiagonal.space/api/public/v1/upstream/scorecards",
      "https://offdiagonal.space/api/public/v1/upstream/status"
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  },
  "contract": {
    "flatplanetProvides": "forecast receipts, model-health histories, comparable peers, provenance and prospective verification — delivered as frozen snapshots",
    "flatplanetDoesNotProvide": "copies of external collections. External dataset rows are loaded directly from their original files by the preparation job.",
    "originSemantics": "hosting is delivery, not origin: distribution never turns reconstructed data into prospective evidence, nor the reverse",
    "preparationNote": "resolve every external source, licence and revision in the preparation stage; a training run should never discover a missing parser or an unaccepted licence"
  }
}