{
  "schemaVersion": "fidc-signal-rolling-scan-rejection/v1",
  "measuredAt": "2026-09-05T13:45:00+08:00",
  "host": "192.168.31.177",
  "candidateCommit": "b65b3ed8f1739f7df84c50ae7993ca2ed3d5857e",
  "removalCommit": "2aa330786aa45ccdfa88c2dc8a65821d8d7a9606",
  "implementation": {
    "description": "replace materialized signal_close values and return values with direct current-series scans for rolling max and return sample standard deviation",
    "businessResultsChanged": false,
    "retainedInProduction": false
  },
  "genericRankFiveYearContract": {
    "rankBy": "free_float_cap",
    "candidateEngineSeconds": [3.707, 3.704, 3.7, 3.736, 3.699, 3.721],
    "candidateProcessHotMedianEngineSeconds": 3.704,
    "acceptedBaselineProcessHotMedianEngineSeconds": 3.465,
    "observedRegressionPercent": 6.897547,
    "canonicalSha256": "84367993911b42437939aad88f29379d007af6f5f171667ff7ad6677dd488fd2",
    "tradeCount": 21876
  },
  "primaryFiveYearContract": {
    "candidateEngineSeconds": [2.624, 2.607, 2.604, 2.601, 2.61],
    "candidateProcessHotMedianEngineSeconds": 2.6055,
    "acceptedBaselineProcessHotMedianEngineSeconds": 2.441,
    "observedRegressionPercent": 6.739041,
    "canonicalSha256": "b42fea66237d06eadb24f6b8c9e2760e7319fe3699f315b99e01f433ef2aa234",
    "tradeCount": 26088
  },
  "secondaryFiveYearContract": {
    "candidateEngineSeconds": [2.349, 2.336, 2.39, 2.365, 2.353],
    "candidateProcessHotMedianEngineSeconds": 2.359,
    "acceptedBaselineProcessHotMedianEngineSeconds": 2.17,
    "observedRegressionPercent": 8.709677,
    "canonicalSha256": "0dbd3fad624097c673c4a5ec2f545f95e9c21d1d5337bb2b48ffeb22b16cb2b9",
    "tradeCount": 19404
  },
  "rollbackFullMinuteContract": {
    "tradeCount": 156,
    "canonicalSha256": "457c086b1bca784fe83f447bb22451925e8f022456bb0fc7b54237a7a7886849",
    "resultStoreSha256": "04d804ee02ad7bc9b3649b4a2b4ddd902a4242ef38e00edeed8058860e9a6997",
    "terminalAuditStatus": "clean"
  },
  "acceptance": {
    "status": "rejected_cross_strategy_regression",
    "reason": "direct scans were slower for generic rank and both daily controls despite exact output parity; candidate and deployed binary were removed"
  }
}