{
  "title": "A synthetic engine-verification strategy that needed more work",
  "recorded_date": "2026-10-19",
  "case_type": "synthetic engineering verification",
  "disclosure": "Real archived engine output on a synthetic fixture. Not a customer strategy, market-coverage claim, profitability demonstration or current service benchmark.",
  "validation": {
    "outcome": "needs_work",
    "failed_or_missing_studies": 0,
    "report_method": "workflow-evidence-report-v3-managed-orders",
    "reported_hash": "1cb40e76c32468675abd94fbb2d664bd0310e7b61c1e958da8fbd85e63f90d99",
    "independent_hash": "1cb40e76c32468675abd94fbb2d664bd0310e7b61c1e958da8fbd85e63f90d99"
  },
  "walk_forward": {
    "method_version": "validation-walk-forward-v1",
    "window_count": 3,
    "profitable_windows": 0,
    "fallback_selections": 3,
    "total_training_trials": 3,
    "evidence_hash": "579aa238ecaa5ea2e39ade3c1217b7c1f040fdb0f4761d8ba45859ec0191fe5b",
    "windows": [
      {
        "ordinal": 1,
        "trades": 133,
        "profitable": false,
        "selection_rule": "frozen_fallback",
        "training_trials": 1
      },
      {
        "ordinal": 2,
        "trades": 114,
        "profitable": false,
        "selection_rule": "frozen_fallback",
        "training_trials": 1
      },
      {
        "ordinal": 3,
        "trades": 133,
        "profitable": false,
        "selection_rule": "frozen_fallback",
        "training_trials": 1
      }
    ]
  },
  "separate_ml_comparison": {
    "outcome": "no_useful_uplift",
    "bound_to_selected_validation_configuration": false,
    "explanation": "The selected validation configuration did not bind this model. This is a separate comparison on the shared engineering fixture."
  },
  "source_archive": "backend/evidence/engine-evolution-20261019",
  "source_files": [
    {
      "file": "compact-report-verification.json",
      "sha256": "e3476f44115587c0cd9518992457688aa7c643ceae36ceee0923984f5745a4c9"
    },
    {
      "file": "validation-walk-forward-verification.json",
      "sha256": "73f46ea2d479b7d5b36ca18b5105780e3b7b0fa705c47028889a918ebd3ee1aa"
    },
    {
      "file": "m1-close-b.md",
      "sha256": "55887ea31c390e100282c0ca9514fca822ec01d342e9ceacf4af7bb6986c2fd0"
    }
  ],
  "excluded": [
    "raw market data",
    "licensed inputs",
    "strategy source and compiled binaries",
    "account and workspace identifiers",
    "private invocation settings"
  ],
  "verification_limit": "This is a selected public extract, not the full original report or a rerun package. Original report hashes cannot be recomputed from this extract."
}