{
  "context": "This criteria evaluates how well the engineer uses the @babel/helper-plugin-utils package and Babel's visitor pattern API to implement a Babel transformation plugin. The focus is on proper plugin structure, correct visitor implementation, and appropriate AST node manipulation.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Plugin wrapper usage",
      "description": "Uses the `declare` function from @babel/helper-plugin-utils to create the plugin wrapper",
      "max_score": 15
    },
    {
      "name": "API version assertion",
      "description": "Calls `api.assertVersion(7)` or `api.assertVersion(REQUIRED_VERSION(7))` to validate Babel version compatibility",
      "max_score": 10
    },
    {
      "name": "Plugin structure",
      "description": "Returns an object with `name` property and `visitor` property containing the visitor implementation",
      "max_score": 15
    },
    {
      "name": "NumericLiteral visitor",
      "description": "Implements a visitor function for the `NumericLiteral` node type to handle hexadecimal literals",
      "max_score": 20
    },
    {
      "name": "Hexadecimal detection",
      "description": "Correctly identifies hexadecimal literals by checking if `node.extra` and `node.extra.raw` exist and match the pattern for hex literals (starting with 0x or 0X)",
      "max_score": 15
    },
    {
      "name": "AST manipulation approach",
      "description": "Modifies the `node.extra.raw` property to change the formatted output, or removes/updates `node.extra` to allow the generator to reformat",
      "max_score": 15
    },
    {
      "name": "Prefix normalization",
      "description": "Converts hexadecimal prefix to lowercase '0x' format in the transformed output",
      "max_score": 5
    },
    {
      "name": "Digit normalization",
      "description": "Converts hexadecimal digits (a-f) to uppercase in the transformed output",
      "max_score": 5
    }
  ]
}