{
  "name": "AstroZen Public Calculation Cases",
  "version": "2026-08-30",
  "license": "CC BY 4.0",
  "scope": "Sanitized deterministic calculation fixtures. No customer records are included.",
  "methodologyUrl": "https://www.astrozen.co/research/accuracy-lab",
  "repositoryPath": "src/tests/calculation-accuracy.test.mts",
  "cases": [
    {
      "id": "true-solar-madrid-1992",
      "system": "bazi-time-normalization",
      "purpose": "Large longitude and summer-offset correction",
      "input": {
        "localDateTime": "1992-06-15T08:30:00",
        "latitude": 40.4165,
        "longitude": -3.70256,
        "standardMeridian": 30
      },
      "expected": {
        "trueSolarTime": "06:15",
        "correctionMinutesRule": "less than -130"
      }
    },
    {
      "id": "true-solar-shanghai-1990",
      "system": "bazi-time-normalization",
      "purpose": "Small correction near the UTC+8 standard meridian",
      "input": {
        "localDateTime": "1990-01-15T09:00:00",
        "latitude": 31.2304,
        "longitude": 121.47,
        "standardMeridian": 120
      },
      "expected": {
        "trueSolarTimeRule": "08:56 or 08:57",
        "absoluteCorrectionMinutesRule": "less than 10"
      }
    },
    {
      "id": "western-madrid-1992",
      "system": "western-natal",
      "purpose": "Planet, angle, house, and aspect output contract",
      "input": {
        "utcDateTime": "1992-06-15T06:30:00.000Z",
        "latitude": 40.4165,
        "longitude": -3.70256
      },
      "expected": {
        "sunSign": "Gemini",
        "moonSign": "Sagittarius",
        "ascendantSign": "Cancer",
        "houseCount": 12,
        "aspectListRule": "nonempty"
      }
    },
    {
      "id": "unknown-birth-time-omissions",
      "system": "cross-system-safety",
      "purpose": "Prevent false precision when time is unavailable",
      "input": {
        "timeKnown": false
      },
      "expected": {
        "omitted": [
          "BaZi Hour Pillar",
          "Ascendant",
          "Midheaven",
          "houses",
          "aspects to angles",
          "time-sensitive Moon claims"
        ]
      }
    },
    {
      "id": "daily-transit-calendar-12-windows",
      "system": "western-transits",
      "purpose": "Verify a daily event scan rather than monthly snapshots only",
      "input": {
        "startDate": "2026-07-17",
        "windowCount": 12
      },
      "expected": {
        "firstWindowStart": "2026-07-17",
        "lastWindowEnd": "2027-07-16",
        "midpointPlanetCountRule": "at least 8 in every window",
        "eventTypesPresent": ["station", "aspect"]
      }
    }
  ]
}