{
  "context": "This criteria evaluates the engineer's ability to use rollup-plugin-sizes custom report functions to export bundle size data to a JSON file. The focus is on correct usage of the plugin's report option and proper handling of the data structure provided by the plugin.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Plugin import",
      "description": "Correctly imports the rollup-plugin-sizes package (e.g., import sizes from 'rollup-plugin-sizes' or require('rollup-plugin-sizes'))",
      "max_score": 10
    },
    {
      "name": "Plugin configuration",
      "description": "Adds the sizes plugin to the Rollup plugins array with proper invocation (e.g., sizes({...}) in the plugins array)",
      "max_score": 15
    },
    {
      "name": "Report option usage",
      "description": "Uses the 'report' option to provide a custom report function (e.g., sizes({ report: (data) => {...} }))",
      "max_score": 25
    },
    {
      "name": "Data structure access",
      "description": "Correctly accesses the 'totals' array from the data object provided to the report function, which contains package summaries with name and size",
      "max_score": 20
    },
    {
      "name": "Package data extraction",
      "description": "Properly extracts package name and size from the totals array entries (e.g., accessing .name and .size properties from each total object)",
      "max_score": 15
    },
    {
      "name": "Total size usage",
      "description": "Uses the 'total' property from the data object to calculate percentages (e.g., data.total for the total bundle size in bytes)",
      "max_score": 10
    },
    {
      "name": "JSON file output",
      "description": "Writes the processed bundle size data to 'bundle-report.json' file using appropriate file system operations (e.g., fs.writeFileSync or fs.promises.writeFile)",
      "max_score": 5
    }
  ]
}