{
  "version": "1.0",
  "scene": {
    "width": 400,
    "height": 300,
    "background": "#F0EBDC",
    "app": "raster_trace",
    "url": "file:///tmp/vql-roundtrip/sample_flat_shapes.png",
    "layers": [
      {
        "id": "traced_regions",
        "objects": [
          {
            "id": "region_000",
            "primitives": [
              {
                "shape_type": "rectangle",
                "params": { "width": 100, "height": 100 }
              }
            ],
            "style": { "color": "#DC3232", "fill": true, "stroke_width": 0 },
            "center_x": 100,
            "center_y": 100,
            "metadata": { "source": "img2svg_regions" }
          }
        ]
      }
    ]
  },
  "metadata": {
    "source": "img2svg",
    "method": "color_grid_merge",
    "fingerprint": { "phash": "abc123" },
    "dominant_colors": ["#F0EBDC", "#DC3232", "#3264C8"],
    "semantic_description": null,
    "exif": {
      "note": "optional slice — EXIF alone cannot reconstruct scene geometry"
    }
  },
  "render_target": "svg"
}