{
  "1": {
    "class_type": "LoadImage",
    "inputs": { "image": "input.png" }
  },
  "2": {
    "class_type": "AppNZPythonFrameBlock",
    "_meta": { "title": "Local, inspectable frame transform" },
    "inputs": {
      "images": ["1", 0],
      "code": "grayscale-pop"
    }
  },
  "3": {
    "class_type": "SaveImage",
    "inputs": { "images": ["2", 0], "filename_prefix": "appnz-frame-transform" }
  }
}