{
  "context": "This evaluation assesses how effectively the engineer uses the pixelmatch package to implement image comparison functionality. The focus is on proper usage of pixelmatch's core API for basic pixel-level comparison including buffer handling, dimension parameters, threshold control, and diff output generation.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "Import pixelmatch",
      "description": "The solution imports or requires the pixelmatch package correctly (e.g., `const pixelmatch = require('pixelmatch')` or similar)",
      "max_score": 10
    },
    {
      "name": "Call pixelmatch function",
      "description": "The solution calls the pixelmatch function with the correct parameters: img1, img2, output (or null), width, height, and options object",
      "max_score": 25
    },
    {
      "name": "Pass image buffers",
      "description": "The solution correctly passes the img1 and img2 buffers as the first two arguments to pixelmatch without unnecessary conversion or copying",
      "max_score": 15
    },
    {
      "name": "Pass dimensions correctly",
      "description": "The solution passes width and height parameters to pixelmatch in the correct order and position (4th and 5th arguments)",
      "max_score": 10
    },
    {
      "name": "Use threshold option",
      "description": "The solution uses the threshold option from the options parameter and passes it correctly to pixelmatch's options object (e.g., `{threshold: options.threshold}`)",
      "max_score": 15
    },
    {
      "name": "Handle output buffer",
      "description": "The solution passes the output buffer from options.output to pixelmatch as the third argument, supporting null/undefined when no diff output is needed",
      "max_score": 15
    },
    {
      "name": "Return mismatch count",
      "description": "The solution returns the result from pixelmatch directly, which represents the count of differing pixels",
      "max_score": 10
    }
  ]
}