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comfyui-node-lifecycle

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ComfyUI node execution lifecycle - caching, fingerprint_inputs/IS_CHANGED, validate_inputs/VALIDATE_INPUTS, check_lazy_status, execution order. Use when debugging execution, implementing caching control, input validation, or understanding execution flow.

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

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# ComfyUI Node Execution Lifecycle

Understanding the execution lifecycle helps build efficient, correct nodes.

## Execution Flow Overview

```
1. Prompt received from frontend
2. Validation phase
   ├── Look up each node class
   ├── Call INPUT_TYPES() / define_schema() for input specs
   ├── Validate connections and types
   ├── Call validate_inputs() for each node
   └── Validate loop boundaries (StartLoop/EndLoop pairing, v0.36+)