A Github Action for diffing custom nodes.

This action checks out your PR branch and your main branch and compares the custom nodes defined in NODE_CLASS_MAPPINGS for backwards incompatible changes.

This helps you develop custom nodes that don't break existing workflows.

• Checks RETURN_TYPES
• Checks INPUT_TYPES

Just add this to your custom node repo: .github/workflows/validate.yml

name: Validate backwards compatibility

on:
  pull_request:
    branches:
      - master
      - main

jobs:
  validate:
    runs-on: ubuntu-latest
    steps:
      - uses: comfy-org/node-diff@main

If you use a branch other than main as your base branch, add that here:

steps:
  - uses: comfy-org/node-diff@main
  with:
    base_ref: 'master'