diff --git a/docs/evidence/symbol-id-ranked-candidates-20260905.json b/docs/evidence/symbol-id-ranked-candidates-20260905.json
new file mode 100644
index 0000000..d88dca9
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+++ b/docs/evidence/symbol-id-ranked-candidates-20260905.json
@@ -0,0 +1,111 @@
+{
+  "schemaVersion": "fidc-symbol-id-ranked-candidates/v1",
+  "measuredAt": "2026-09-05T06:23:00+08:00",
+  "host": "192.168.31.177",
+  "engineCommit": "52f9ee9d92781c1367ba4f01cbc3b1676fdd241e",
+  "serviceCommit": "9fd5a9e6d5668af57f6942fc3c4127953545d9c6",
+  "runnerBinarySha256": "c567c6da3d3625839a1d0127f755ccd278f31473924bf81ab837158370c08667",
+  "implementation": {
+    "description": "rank custom and quote-plan candidates as (symbol_id, rank, state_index), borrow symbols only at diagnostics and output boundaries, and use the lexical symbol-id order as the exact equal-rank tie breaker",
+    "symbolIdContract": "DataSet assigns u32 ids after sorting the complete normalized symbol set lexicographically",
+    "candidateSymbolClonesRemoved": true,
+    "selectionResultCached": false,
+    "persistentCacheAdded": false,
+    "rankTieSemanticsChanged": false,
+    "pitSemanticsChanged": false
+  },
+  "rejectedIntermediate": {
+    "commit": "d7e11be",
+    "problem": "looked up both factor-row strings inside every equal-rank comparator call even though symbol ids already encode lexical order",
+    "engineSeconds": [6.056, 6.274, 5.298, 6.071, 6.066, 5.957],
+    "retainedInFinalCode": false
+  },
+  "genericRankFiveYearContract": {
+    "rankBy": "free_float_cap",
+    "totalReturn": 0.7140315244542004,
+    "tradeCount": 21876,
+    "canonicalSha256": "84367993911b42437939aad88f29379d007af6f5f171667ff7ad6677dd488fd2",
+    "resultStoreSha256": "e2c7401bb9950da6fdfc0b516428061651e3e5b874a5f80c4b03ab8a81e90191",
+    "arenaBaselineMedianEngineSeconds": 4.222,
+    "engineSeconds": [3.809, 3.685, 3.739, 3.743, 3.76, 3.752],
+    "processHotMedianEngineSeconds": 3.743,
+    "incrementalImprovementPercent": 11.345334,
+    "originalCachedBaselineMedianEngineSeconds": 5.934,
+    "cumulativeImprovementPercent": 36.922818,
+    "resultConsistent": true,
+    "terminalAuditStatus": "clean"
+  },
+  "primaryOrderedFiveYearContract": {
+    "totalReturn": 0.9219861819172002,
+    "tradeCount": 26088,
+    "canonicalSha256": "b42fea66237d06eadb24f6b8c9e2760e7319fe3699f315b99e01f433ef2aa234",
+    "resultStoreSha256": "92343fb369fea68b2544b654151c5c43a935940580b14afbe8eefb3844f72a54",
+    "previousProcessHotMedianEngineSeconds": 2.73,
+    "processHotMedianEngineSeconds": 2.611,
+    "observedImprovementPercent": 4.358974,
+    "resultConsistent": true,
+    "terminalAuditStatus": "clean"
+  },
+  "secondaryOrderedFiveYearContract": {
+    "totalReturn": 1.1342962298106998,
+    "tradeCount": 19404,
+    "canonicalSha256": "0dbd3fad624097c673c4a5ec2f545f95e9c21d1d5337bb2b48ffeb22b16cb2b9",
+    "resultStoreSha256": "416d2f87241fb4c6b917f6aeecb588f82f6e7d51a103f4c53a74d11971f16839",
+    "previousProcessHotMedianEngineSeconds": 2.372,
+    "processHotMedianEngineSeconds": 2.346,
+    "observedImprovementPercent": 1.096121,
+    "resultConsistent": true,
+    "terminalAuditStatus": "clean"
+  },
+  "fullMinuteContract": {
+    "scheduleTime": "10:18",
+    "matchingType": "minute_last",
+    "slippageModel": "price_ratio",
+    "slippageValue": 0.001,
+    "totalReturn": 0.03473222656500008,
+    "tradeCount": 156,
+    "canonicalSha256": "457c086b1bca784fe83f447bb22451925e8f022456bb0fc7b54237a7a7886849",
+    "resultStoreSha256": "04d804ee02ad7bc9b3649b4a2b4ddd902a4242ef38e00edeed8058860e9a6997",
+    "totalSeconds": [0.608, 0.608],
+    "engineSeconds": [0.161, 0.167],
+    "resultConsistent": true,
+    "terminalAuditStatus": "clean"
+  },
+  "profile": {
+    "runId": "btr_1788560495042_846890_19",
+    "engineSeconds": 4.007,
+    "allThreadEventCycles": 86456699303,
+    "transientStockStateBuilderPercent": 18.97,
+    "numericVmEvaluatePercent": 8.0,
+    "rankedSelectionPercent": 7.6,
+    "adjustedCloseMovingAveragePercent": 5.38,
+    "stableSortPercent": 3.09,
+    "mallocPercent": 1.19,
+    "arenaBaselineMallocPercent": 3.34,
+    "lostSamples": 0
+  },
+  "memory": {
+    "serviceCgroupCurrentBytes": 11537428480,
+    "serviceCgroupPeakBytes": 11538923520,
+    "persistentCacheAddedBytes": 0
+  },
+  "testGate": {
+    "workspaceTotal": 544,
+    "passed": 536,
+    "ignoredManualBenchmarks": 8,
+    "failed": 0,
+    "lexicalSymbolIdRegression": true
+  },
+  "remoteArtifacts": [
+    "/srv/fidc/canonical/run/fidc-private/evidence/symbol-id-rank-tie-fixed-generic-20260905.json",
+    "/srv/fidc/canonical/run/fidc-private/evidence/symbol-id-rank-tie-fixed-primary-20260905.json",
+    "/srv/fidc/canonical/run/fidc-private/evidence/symbol-id-rank-tie-fixed-secondary-20260905.json",
+    "/srv/fidc/canonical/run/fidc-private/evidence/symbol-id-rank-tie-fixed-full-minute-20260905.json",
+    "/srv/fidc/canonical/run/fidc-private/evidence/symbol-id-rank-profile-20260905/perf.data",
+    "/srv/fidc/canonical/run/fidc-private/evidence/symbol-id-rank-profile-20260905/perf-report.txt"
+  ],
+  "acceptance": {
+    "status": "accepted_symbol_id_ranked_candidates",
+    "reason": "the final implementation preserves exact rank ties and all business outputs, improves the generic five-year median by 11.35 percent over the arena baseline and 36.92 percent over the old cached path, improves both ordered controls, and lowers malloc share without persistent memory"
+  }
+}