{
  "context": "This criteria evaluates how well the engineer uses Babel's decorator transformation capabilities to build a transpiler. The focus is on proper usage of @babel/core APIs and @babel/plugin-proposal-decorators plugin to transform decorator syntax.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Uses @babel/core",
      "description": "Imports and uses the @babel/core package for code transformation (e.g., transform, transformSync, or transformAsync functions)",
      "max_score": 25
    },
    {
      "name": "Configures decorator plugin",
      "description": "Uses @babel/plugin-proposal-decorators in the Babel configuration with appropriate options (e.g., specifying the decorator version like '2023-11' or 'legacy')",
      "max_score": 30
    },
    {
      "name": "Handles transformation result",
      "description": "Correctly extracts and returns the transformed code from Babel's transformation result object (typically accessing the .code property)",
      "max_score": 20
    },
    {
      "name": "Proper API structure",
      "description": "Implements the transpile function that accepts code string and options object, returning a result object containing the transformed code",
      "max_score": 15
    },
    {
      "name": "Handles options",
      "description": "Passes transformation options to Babel's transform API (e.g., plugins array, presets, or other Babel configuration options)",
      "max_score": 10
    }
  ]
}