{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "title": "Provisional CAL FIRE shared market ladder",
  "type": "object",
  "required": ["schema_version", "methodology", "source_snapshot", "source_manifest_sha256", "measurement", "reference_cap", "thresholds", "operator", "weights_percent", "history", "historical_exceedance"],
  "properties": {
    "schema_version": {"const": "1.0"},
    "methodology": {"const": "calfire-structures-destroyed/0.4.0"},
    "source_snapshot": {"const": "calfire-redbook-2025-frozen-v1"},
    "source_manifest_sha256": {"type": "string", "pattern": "^[a-f0-9]{64}$"},
    "measurement": {"type": "string"},
    "reference_cap": {"const": 25000},
    "thresholds": {"type": "array", "minItems": 20, "maxItems": 20, "items": {"type": "integer", "minimum": 1}},
    "operator": {"const": ">="},
    "weights_percent": {"type": "array", "minItems": 20, "maxItems": 20, "items": {"const": 5}},
    "history": {"type": "array", "minItems": 20, "maxItems": 20},
    "historical_exceedance": {"type": "array", "minItems": 20, "maxItems": 20}
  },
  "additionalProperties": true
}