{
  "context": "This criteria evaluates how well the engineer uses pillow-heif's thumbnail reading capabilities. The focus is on using the package's API to detect, access, and extract embedded thumbnails from HEIF/HEIC images.",
  "type": "weighted_checklist",
  "checklist": [
    {
      "name": "HEIF file opening",
      "description": "Uses pillow-heif to open HEIF files correctly (e.g., using open_heif(), read_heif(), or Pillow plugin via Image.open())",
      "max_score": 15
    },
    {
      "name": "Thumbnail detection",
      "description": "Correctly checks for the presence of thumbnails using the info['thumbnails'] property or equivalent mechanism",
      "max_score": 25
    },
    {
      "name": "Thumbnail count",
      "description": "Accurately reports the number of thumbnails by examining the length of the thumbnails list",
      "max_score": 15
    },
    {
      "name": "Box size access",
      "description": "Retrieves and reports thumbnail box sizes from the info['thumbnails'] list",
      "max_score": 20
    },
    {
      "name": "Thumbnail extraction",
      "description": "Extracts thumbnail images from the HEIF container (thumbnails are stored as separate images in the container)",
      "max_score": 15
    },
    {
      "name": "Thumbnail saving",
      "description": "Converts thumbnails to PIL Images and saves them as PNG files with appropriate naming",
      "max_score": 10
    }
  ]
}