From 6a1c60b2e2e8f6a288e37398ffd16ea88a3e5c1b Mon Sep 17 00:00:00 2001
From: boris <shuaibo.zhang@hotmail.com>
Date: Sat, 5 Sep 2026 13:35:00 +0800
Subject: [PATCH] docs: record signal rolling rejection

---
 ...ignal-rolling-scan-rejection-20260905.json | 47 +++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 docs/evidence/signal-rolling-scan-rejection-20260905.json

diff --git a/docs/evidence/signal-rolling-scan-rejection-20260905.json b/docs/evidence/signal-rolling-scan-rejection-20260905.json
new file mode 100644
index 0000000..16cbf6f
--- /dev/null
+++ b/docs/evidence/signal-rolling-scan-rejection-20260905.json
@@ -0,0 +1,47 @@
+{
+  "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": 2.353,
+    "acceptedBaselineProcessHotMedianEngineSeconds": 2.17,
+    "observedRegressionPercent": 8.43318,
+    "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"
+  }
+}