{
  "context": "Tests whether the agent proactively adds production error handling when building a multi-resource e-commerce API. The task does not mention error handling -- criteria check for global error middleware, async safety, structured responses, and proper status codes for various failure modes (validation, not found, insufficient stock).",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Global error middleware",
      "description": "A centralized error-handling middleware with 4 arguments (err, req, res, next) is defined and registered after all routes",
      "max_score": 14
    },
    {
      "name": "Async error safety",
      "description": "All async route handlers are protected via asyncHandler wrapper, try/catch with next(err), or express-async-errors. No bare async handlers.",
      "max_score": 14
    },
    {
      "name": "Structured error responses",
      "description": "All error responses follow a consistent shape (e.g. { error: { code, message } }). No mixed formats across different routes.",
      "max_score": 12
    },
    {
      "name": "No internal error leaks",
      "description": "Unexpected errors return a generic message -- no stack traces, raw error strings, or internal paths exposed to the client",
      "max_score": 10
    },
    {
      "name": "Validation with details",
      "description": "Validation errors for the complex POST /api/orders endpoint include information about which fields or items failed and why",
      "max_score": 10
    },
    {
      "name": "Not-found handling",
      "description": "Requests for non-existent products or orders return 404, not 500 or 200 with an error message",
      "max_score": 8
    },
    {
      "name": "Business rule error handling",
      "description": "Insufficient stock or similar business rule violations return an appropriate 4xx status (e.g. 400, 409, or 422), not 500",
      "max_score": 8
    },
    {
      "name": "404 catch-all",
      "description": "Unmatched routes get a JSON 404 response instead of Express's default HTML error page",
      "max_score": 7
    },
    {
      "name": "Graceful shutdown",
      "description": "Process signal handlers (SIGTERM/SIGINT) are registered with server.close()",
      "max_score": 7
    },
    {
      "name": "Appropriate status codes",
      "description": "Different error types return different HTTP status codes: 400 for validation, 404 for not found, appropriate 4xx for business rules, 500 for unexpected -- not all errors mapped to the same code",
      "max_score": 10
    }
  ]
}