{
  "step": "C281",
  "date": "2026-09-24",
  "status": "completed",
  "title": "Noah coverage in the restored MT realization",
  "previous_certificate_sha256": "6309325f58ae1ed62613d26bed9880ab3599d98527e941189deb410f22b2a9e5",
  "source_manifest_sha256": "fb8b5669d629483a66c00b621da49d95050402e39ecdbd6a777657bf570cb83c",
  "step_sha256": "189cec9ce299ad9f1c489afb84be7d80820575a973c19680f87cec7b9712aab4",
  "report_sha256": "67f9fb39439f4d6c30a2d676f9a29d8f33b54a558778d0244e40aca79b23b9a6",
  "checkpoint_sha256": "2528976d60cbe5781d7b7b19d98cbe20587ea066a4dbaa2448979e2a320ee2ad",
  "results_sha256": "7155d6f4a164200d13157fb7e111ed303095dedbc4ca4c19dbbf0f3545213fcb",
  "data_sha256": "978f605e2e589e0b4551d258d85985eb009f376f225d8f7a5566cb5f62f01ae7",
  "calculation_sha256": "b9aa9d0c962d47454d34a651b2c688daa76a419158fc859410c2d2256270f27a",
  "verifier_sha256": "1b0d77f7bd90c94c014bf13467830ac053579a4ca021d6d777d8442441f73259",
  "review_sha256": "882b9ed64a59b211e0daf63354707d5b548ac96ef71a61ed8927d244a960ee81",
  "replay_sha256": "421126c2aab719a45da373285260ac6216bbd694f91d0d49bb0ae167a6db1c52",
  "control_integrity_sha256": "41aee61f77fbc03abaf36ac516ed70de5eb5b9e3532ea9adcb9d26b0eeb3b797",
  "next_step_decision_sha256": "71ba9e2d8bfa25815ee729c9e56650ee6a6363b55f1c927df66a27f5025270a6",
  "assertions_passed": 10,
  "source_checks_passed": 8,
  "frozen_inputs": 6,
  "main_result": "The restored MT realization supports three600 rectangles and two598/two602 crosspairs; SP-only companions cannot be transferred.",
  "limits": [
    "No MT companion rail is admitted.",
    "Missing source records cannot be supplied by covariance alone.",
    "Regular Cainan remains130, cumulative Cainan460."
  ],
  "canonical_or_graph_edits": false,
  "new_independent_agent_review": false,
  "next_proposed_step": "C282: test the tagged mixed-Cainan1058=598+460=2K route and whether its retained endpoint completes a15K+2K=17K path.",
  "next_step_executed": false
}