{
  "$id": "https://stella-ops.org/schemas/heuristics.schema.json",
  "type": "object",
  "required": ["version", "updatedAt", "heuristics", "signing"],
  "properties": {
    "version": {"type": "string"},
    "updatedAt": {"type": "string", "format": "date-time"},
    "heuristics": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["id", "band", "inputs", "formula", "normalization"],
        "properties": {
          "id": {"type": "string"},
          "band": {"enum": ["gold", "silver", "bronze"]},
          "inputs": {"type": "array", "items": {"type": "string"}},
          "formula": {"type": "string"},
          "normalization": {"type": "string"},
          "evidence": {"type": "array", "items": {"type": "string"}}
        }
      }
    },
    "signing": {
      "type": "object",
      "required": ["predicate", "dsse_required"],
      "properties": {
        "predicate": {"type": "string"},
        "dsse_required": {"type": "boolean"}
      }
    }
  }
}