{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://aps.local/contracts/error.schema.json",
  "title": "ErrorEnvelope",
  "description": "HTTP 错误统一形状；SSE 里的错误见 events.schema.json 的 error 事件。",
  "$ref": "#/$defs/ErrorEnvelope",
  "$defs": {
    "ErrorEnvelope": {
      "type": "object",
      "required": ["error"],
      "properties": {
        "error": {
          "type": "object",
          "required": ["code", "message", "retryable"],
          "properties": {
            "code": { "type": "string" },
            "message": { "type": "string" },
            "retryable": { "type": "boolean" },
            "detail": {}
          },
          "additionalProperties": false
        }
      },
      "additionalProperties": false
    }
  }
}