{
  "label": "Checks a context-compaction record: source binding, compression ratio, verbatim retention of every must-retain item, no critical drop, no invented item and claim honesty. It does not judge summary quality.",
  "public_key_b64": "LAcfWqEs+6ccdR9k4ywhsX8SkTERvA8PNtnYBJeoX/0=",
  "records": [
    {
      "checks": [
        {
          "detail": "the context hash covers exactly these items and their must-retain flags",
          "id": "binding.context_hash",
          "ok": true
        },
        {
          "detail": "2400 < 12000 tokens",
          "id": "compression.smaller",
          "ok": true
        },
        {
          "detail": "ratio 0.2 <= 0.3",
          "id": "compression.within_ratio",
          "ok": true
        },
        {
          "detail": "the retained id is in the source",
          "id": "retained.C-constraint.exists",
          "ok": true
        },
        {
          "detail": "the retained quote hashes to the source text",
          "id": "retained.C-constraint.verbatim",
          "ok": true
        },
        {
          "detail": "the retained id is in the source",
          "id": "retained.D-decision.exists",
          "ok": true
        },
        {
          "detail": "the retained quote hashes to the source text",
          "id": "retained.D-decision.verbatim",
          "ok": true
        },
        {
          "detail": "the retained id is in the source",
          "id": "retained.Q-open.exists",
          "ok": true
        },
        {
          "detail": "the retained quote hashes to the source text",
          "id": "retained.Q-open.verbatim",
          "ok": true
        },
        {
          "detail": "kept verbatim in the summary",
          "id": "C-constraint.must_retain_kept",
          "ok": true
        },
        {
          "detail": "not in the dropped list",
          "id": "C-constraint.must_retain_not_dropped",
          "ok": true
        },
        {
          "detail": "kept verbatim in the summary",
          "id": "D-decision.must_retain_kept",
          "ok": true
        },
        {
          "detail": "not in the dropped list",
          "id": "D-decision.must_retain_not_dropped",
          "ok": true
        },
        {
          "detail": "kept verbatim in the summary",
          "id": "Q-open.must_retain_kept",
          "ok": true
        },
        {
          "detail": "not in the dropped list",
          "id": "Q-open.must_retain_not_dropped",
          "ok": true
        },
        {
          "detail": "no invented item",
          "id": "retention.no_invented_items",
          "ok": true
        },
        {
          "detail": "claimed True, computed True",
          "id": "claims.all_critical_retained",
          "ok": true
        },
        {
          "detail": "claimed True, computed True",
          "id": "claims.compressed",
          "ok": true
        },
        {
          "detail": "claimed True, computed True",
          "id": "claims.no_invented_items",
          "ok": true
        }
      ],
      "created_at": "2026-11-12T07:59:15Z",
      "engine": "a75-015/1.0.0",
      "extra": {
        "computed": {
          "all_critical_retained": true,
          "compressed": true,
          "no_invented_items": true
        },
        "dropped": [
          "F-background"
        ],
        "ratio": 0.2,
        "retained": {
          "C-constraint": true,
          "D-decision": true,
          "Q-open": true
        }
      },
      "failed": [],
      "label": "Checks a context-compaction record: source binding, compression ratio, verbatim retention of every must-retain item, no critical drop, no invented item and claim honesty. It does not judge summary quality.",
      "prev_record_hash": "34d006eb36a0464115f895bd8a6b327f32b0d56a4166b52c653b751a314c8bba",
      "public_key_b64": "LAcfWqEs+6ccdR9k4ywhsX8SkTERvA8PNtnYBJeoX/0=",
      "record_hash": "67b82c1f178c4771e1ac18a0910610b57eb7b0d4e69d6ce7d9a263908ffd1124",
      "schema": "cain42.a75.context.record.v1",
      "signature_b64": "lXXY3OH2SmBC8pGfEGy1k8q2BIjr+FI4w9lbCgMh5mrFPSeDRTAU+e/0cn5Mmw5Yje1Y7hgtAMKAJBM2asJgDg==",
      "sku": "CAIN-A75-015",
      "subject": {
        "claims": {
          "all_critical_retained": true,
          "compressed": true,
          "no_invented_items": true
        },
        "compaction": {
          "dropped_ids": [
            "F-background"
          ],
          "max_compression_ratio": 0.3,
          "method": "hierarchical_summary",
          "retained": [
            {
              "id": "C-constraint",
              "quote_sha256": "5707aff53ff29f46bc93d879c2090eadfd1750de695cbcf625981e84efd5b4fe"
            },
            {
              "id": "D-decision",
              "quote_sha256": "cf65057c1042d99e094cf0fb0102c428426d70e159ae63f88a01c380075cd9b0"
            },
            {
              "id": "Q-open",
              "quote_sha256": "809974dc26e144de757b9f8a778450e95cd86a0aee35da1057f58e712975af5b"
            }
          ],
          "source_tokens": 12000,
          "summary_tokens": 2400
        },
        "schema": "cain42.a75.context.compaction.v1",
        "source": {
          "context_sha256": "cb2af0b979f9e05bf02af9126ad57d2bc9cedf4d6b0c1166c5ca4cd7b072d81d",
          "items": [
            {
              "id": "C-constraint",
              "kind": "constraint",
              "must_retain": true,
              "sha256": "5707aff53ff29f46bc93d879c2090eadfd1750de695cbcf625981e84efd5b4fe",
              "text": "Never send customer data to a third-party endpoint."
            },
            {
              "id": "D-decision",
              "kind": "decision",
              "must_retain": true,
              "sha256": "cf65057c1042d99e094cf0fb0102c428426d70e159ae63f88a01c380075cd9b0",
              "text": "Use the EU region for all PII processing."
            },
            {
              "id": "Q-open",
              "kind": "open_question",
              "must_retain": true,
              "sha256": "809974dc26e144de757b9f8a778450e95cd86a0aee35da1057f58e712975af5b",
              "text": "Does the vendor support field-level encryption?"
            },
            {
              "id": "F-background",
              "kind": "fact",
              "must_retain": false,
              "sha256": "cebe5a205d7ecd35eb4519dbeba096bf35aeaf63e00aeae700174cbed3ca6afa",
              "text": "The staging cluster has four nodes."
            }
          ]
        }
      },
      "subject_sha256": "62e8910e369e70a1e0eb6574049913fc08ed11d25d499c08ea8a8b5c93c42410",
      "verdict": "PRESERVED"
    }
  ],
  "run_hash": "1b6f6f61bc12e4515c517efcaf0ab98f11bf8a4865b3944eeb0fcddc17caf197",
  "schema": "cain42.a75.context.run.v1",
  "sku": "CAIN-A75-015",
  "verdict": "VERIFIED",
  "verdicts": [
    "PRESERVED"
  ]
}