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comfyui-node-migration

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ComfyUI V1 to V3 node migration - converting legacy nodes to the V3 API. Use when migrating existing custom nodes from V1 to V3, understanding differences between API versions, or modernizing node code.

plugins/comfyui-custom-nodes/skills/comfyui-node-migration/SKILL.md

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# ComfyUI V1 → V3 Migration Guide

Migrate existing V1 nodes to the modern V3 API. V3 uses classmethods, typed inputs/outputs, and `ComfyExtension` registration.

## Migration Checklist

1. Change base class to `io.ComfyNode`
2. Replace `INPUT_TYPES()` with `define_schema()` returning `io.Schema`
3. Rename execution function to `execute` and make it a `@classmethod`
4. Replace return tuples with `io.NodeOutput(...)`
5. Replace `IS_CHANGED` with `fingerprint_inputs`
6. Replace `VALIDATE_INPUTS` with `validate_inputs`
7. Convert `check_lazy_status` to `@classmethod`
8. Replace `NODE_CLASS_MAPPINGS` with `ComfyExtension` + `comfy_entrypoint()`
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