{
  "context": "This criteria evaluates the engineer's ability to use the qrcode package's PyPNG image factory for generating QR codes without PIL/Pillow dependencies. The focus is on correctly selecting and configuring the pure Python PNG output format.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "PyPNGImage factory usage",
      "description": "Uses qrcode.image.png.PyPNGImage as the image_factory parameter when creating QR codes, ensuring PNG output without PIL dependency",
      "max_score": 30
    },
    {
      "name": "QRCode instantiation",
      "description": "Properly instantiates the QRCode class with appropriate parameters or uses the make() function with image_factory specified",
      "max_score": 15
    },
    {
      "name": "Data addition",
      "description": "Correctly uses add_data() method to add text data to the QR code, or passes data directly to make() function",
      "max_score": 10
    },
    {
      "name": "QR code compilation",
      "description": "Calls the make() method (or make(fit=True)) to compile the QR code data structure before generating the image",
      "max_score": 10
    },
    {
      "name": "Box size configuration",
      "description": "Properly configures the box_size parameter to control the pixel size of each QR module",
      "max_score": 10
    },
    {
      "name": "Border configuration",
      "description": "Properly configures the border parameter to control the white border width in modules",
      "max_score": 10
    },
    {
      "name": "Error correction level",
      "description": "Sets error_correction parameter to ERROR_CORRECT_M (medium level) or appropriately handles error correction",
      "max_score": 5
    },
    {
      "name": "Image generation",
      "description": "Calls make_image() method to generate the PNG image object from the compiled QR code",
      "max_score": 5
    },
    {
      "name": "File saving",
      "description": "Uses the save() method or similar mechanism to write the generated PNG image to the specified file path",
      "max_score": 5
    }
  ]
}