{
  "context": "This criteria evaluates how well the engineer uses the aggregate-error package's TypeScript generic support to create a type-safe error validation system. The focus is on proper usage of the AggregateError class with type parameters to maintain type safety when collecting multiple custom error instances.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Import AggregateError",
      "description": "Correctly imports AggregateError from the 'aggregate-error' package (e.g., `import AggregateError from 'aggregate-error'`)",
      "max_score": 10
    },
    {
      "name": "Use Generic Type Parameter",
      "description": "Uses AggregateError with a generic type parameter that specifies the union of custom error types (e.g., `new AggregateError<ValidationError | RangeError>(errors)`) to ensure type safety",
      "max_score": 30
    },
    {
      "name": "Pass Error Array",
      "description": "Correctly passes the array of error instances to the AggregateError constructor",
      "max_score": 15
    },
    {
      "name": "Return AggregateError Instance",
      "description": "Returns the AggregateError instance from the handleValidationErrors function when errors are present",
      "max_score": 15
    },
    {
      "name": "Type-Safe Error Access",
      "description": "The implementation enables type-safe access to individual errors through the aggregated error's errors property, preserving the custom error types (ValidationError and RangeError)",
      "max_score": 20
    },
    {
      "name": "Handle Empty Array",
      "description": "Correctly handles the empty array case by returning null without creating an AggregateError instance",
      "max_score": 10
    }
  ]
}