{
  "schemaVersion": "fidc-rolling-boundary-reuse-rejection/v1",
  "measuredAt": "2026-09-05T12:40:00+08:00",
  "host": "192.168.31.177",
  "candidateCommit": "6b5d576",
  "rollbackCommit": "b55ac0bf814641ec09f61f4ec10d52b311ee8aab",
  "finalRemovalCommit": "b55ac0bf814641ec09f61f4ec10d52b311ee8aab",
  "implementation": {
    "description": "share one adjusted-close base factor and one valid-volume count across batched rolling windows",
    "businessResultsChanged": false,
    "retainedInProduction": false
  },
  "primaryFiveYearContract": {
    "candidateEngineSeconds": [2.6, 2.557, 2.564, 2.603, 2.574, 2.614],
    "candidateProcessHotMedianEngineSeconds": 2.587,
    "acceptedBaselineEngineSeconds": 2.441,
    "observedRegressionPercent": 5.981155,
    "canonicalSha256": "b42fea66237d06eadb24f6b8c9e2760e7319fe3699f315b99e01f433ef2aa234",
    "tradeCount": 26088
  },
  "secondaryFiveYearContract": {
    "candidateEngineSeconds": [2.381, 2.323, 2.344, 2.377, 2.353, 2.348],
    "candidateProcessHotMedianEngineSeconds": 2.3505,
    "acceptedBaselineEngineSeconds": 2.17,
    "observedRegressionPercent": 8.317972,
    "canonicalSha256": "0dbd3fad624097c673c4a5ec2f545f95e9c21d1d5337bb2b48ffeb22b16cb2b9",
    "tradeCount": 19404
  },
  "acceptance": {
    "status": "rejected_cross_strategy_regression",
    "reason": "both real five-year controls became slower despite exact result parity; candidate code and production binary were removed"
  }
}