{
  "context": "This criteria evaluates how well the engineer uses AWS SDK v3's custom HTTP handler functionality to implement a request logging handler. The focus is on correctly implementing the handler interface, integrating it with SDK clients, and properly delegating to another handler.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Handler interface implementation",
      "description": "The custom handler implements the correct interface with a handle() method that accepts an HttpRequest and returns a Promise resolving to an HttpResponse object, matching the AWS SDK handler signature",
      "max_score": 25
    },
    {
      "name": "Request interception",
      "description": "The implementation correctly extracts request details (URL, method, headers, and optionally body) from the HttpRequest object and invokes the onRequest callback with this information",
      "max_score": 20
    },
    {
      "name": "Client configuration",
      "description": "The custom handler is properly configured on an AWS SDK client (e.g., STSClient) using the requestHandler configuration option in the client constructor",
      "max_score": 20
    },
    {
      "name": "Delegate handler invocation",
      "description": "The custom handler correctly calls the delegate handler's handle() method, passing the HttpRequest object, and awaits the result",
      "max_score": 20
    },
    {
      "name": "Response passthrough",
      "description": "The HttpResponse object returned from the delegate handler is returned unchanged from the custom handler's handle() method, ensuring transparent request processing",
      "max_score": 15
    }
  ]
}