{
  "artifact_type": "source_change_watch_demo",
  "boundary": "Source change detection only. Semantic/control materiality requires review. Historical as-of receipts are preserved.",
  "result": {
    "admitted": {
      "digest_sha256": "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
      "effective_date": "2026-02-01",
      "provider_core": "ERCOT-SECTION5",
      "source_id": "ERCOT-PLANNING-GUIDE-SECTION5-2026-02-01"
    },
    "changed_fields": [
      "source_id",
      "effective_date",
      "digest_sha256"
    ],
    "future_event_admission": "BLOCK_PENDING_REVIEW",
    "historical_receipts": "PRESERVE_AS_OF",
    "observed": {
      "digest_sha256": "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
      "effective_date": "2026-08-01",
      "provider_core": "ERCOT-SECTION5",
      "source_id": "ERCOT-PLANNING-GUIDE-SECTION5-2026-08-01"
    },
    "provider_core": "ERCOT-SECTION5",
    "semantic_review": "REQUIRED",
    "status": "SOURCE_CHANGE_DETECTED"
  },
  "synthetic": true
}