{
  "type": "object",
  "properties": {
    "step": {
      "type": "integer",
      "description": "Matched rule number (1-based)"
    },
    "reason": {
      "type": "string",
      "description": "Brief justification for the decision"
    }
  },
  "required": ["step", "reason"],
  "additionalProperties": false
}