{
  "version": 1,
  "scope": "Independent arithmetic implementation, same preserved input; NOT independent price/FX-source verification or individual tax validation",
  "price_sha256": "34d709809fe2197dfdd20c2e9439da06fc7f67b15f97574a25d7e7f6de574a84",
  "audit_model_sha256": "6cfbc18d8788856840c68cd09125d2c2a34d925a162bfcb81330adeddb82f134",
  "reference_exporter_sha256": "c69a92198fe4cb82d543099d44aad304a7abd89a9c3bd30175c769b24eb6312c",
  "reference_engine_sha256": "4e1fcdcbd35b2aab5c3ad4d9b345ec47023973550a2f5714ed82bfa778227aef",
  "published_windows_sha256": "ea12bc411de731a31b013665780f5896f967ffa8ff5034b3b23181f3416b745c",
  "precision": "Python Decimal 40 significant digits; separately valued contribution lots",
  "supported_window_counts": {
    "VOO": 134,
    "QQQ": 134,
    "SCHD": 121,
    "VTI": 134,
    "VXUS": 130,
    "BND": 134,
    "GLD": 134
  },
  "supported_windows": 921,
  "fixed_cases": 12,
  "synthetic_fixtures": 9,
  "tolerances": {
    "engine_krw": 0.0001,
    "engine_mdd_ratio": 1e-09,
    "display_krw": 0.5001,
    "display_mdd_percentage_points": 0.005001
  },
  "maximum_engine_errors": {
    "monthly_value_krw": 1.7019848876579976e-07,
    "terminal_krw": 1.421105933039569e-07,
    "mdd_ratio": 4.535140060952775e-16
  },
  "maximum_legacy_amount_scaling_error_krw": 83.05680240578391,
  "precision_regression_case": {
    "ticker": "VXUS",
    "start": "2019-05",
    "monthly": 50000000,
    "expected_pre_krw": 3883144417,
    "legacy_pre_krw": 3883144500
  },
  "maximum_precise_amount_scaling_error_krw": 0.4997810523913791,
  "full_precision_windows": 921,
  "market_data_verification": "partial samples only; unresolved adjusted-price vintage and full series audit",
  "cashflow_risk_example": {
    "monthly_krw": 1000000,
    "prices": [
      100,
      50
    ],
    "account_values_krw": [
      1000000,
      1500000
    ],
    "account_mdd_pct": 0,
    "price_mdd_pct": -50
  }
}