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DSL Outputs

Mark workflow outputs with the $output.name marker to easily reference generated media.

Basic Output Marking

{
  "9": {
    "class_type": "SaveImage",
    "_meta": {
      "title": "$output.cover"
    },
    "inputs": {
      "filename_prefix": "book_cover",
      "images": ["8", 0]
    }
  }
}

Access by name: 

result = await kit.execute("workflow.json", params)
cover_image = result.images_by_var["cover"][0]

Multiple Outputs

{
  "9": {
    "class_type": "SaveImage",
    "_meta": {
      "title": "$output.cover"
    }
  },
  "15": {
    "class_type": "SaveImage",
    "_meta": {
      "title": "$output.thumbnail"
    }
  }
}

Access each: 

cover = result.images_by_var["cover"][0]
thumbnail = result.images_by_var["thumbnail"][0]

Auto-detection

Without $output markers, ComfyKit auto-detects outputs by node ID:

# Access by node ID
images_from_node_9 = result.images_by_var["9"]

Next Steps