REMOVE THIS SECTION ONCE THE REPO IS SET UP.

Framework/SDK maintainers: This template includes setup guides, utilities, and a GitHub Action to help you and your community build and publish codemods with ease.

One-time setup

NOTE: You need repo creation privileges in your org and permission to install GitHub apps on repos. If you don’t, you can request access from your org admin during setup.

1. Use this template and create a codemods repo in your org.
2. Sign up at Codemod with your GitHub account.
3. Install the Codemod GitHub app:
   1. Click your profile photo (top left) and select "Add organization"
   2. Pick GitHub, choose your org and the new codemods repo. This installs the Codemod GitHub App and reserves a scope with your org name.
   • Benefit: Only members of your org can publish codemods with a name that starts wihh your scope.
   • Important: In codemod.yaml, the name must start with your scope, otherwise it won’t appear when users filter for your scope in the registry.
4. In Codemod, switch from personal account to org account and generate a Codemod API key.
5. In your GitHub repo: Settings → Secrets & variables → actions
   1. Create a repository secret.
   • Name: CODEMOD_API_KEY
   • Value: the key from step 1.

✅ Done! After a codemod PR is merged, you can trigger the GitHub Action to auto-publish it to the Codemod Registry under your org scope. See Node.js codemods for an example.

To build a codemod, clone your new repo locally and use Codemod MCP in your IDE to replace the boilerplate with a codemod generated using AI. You can also run npx codemod@latest init for the initial scaffolding, or use Codemod Studio for its live codemod runner and AST viewer.

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Official eslint codemods to help users adopt new features and handle breaking changes with ease.

Community contributions are welcome and appreciated! Check open issues for codemods to build, or open a new one if something’s missing. See the contribution guide for details.

Running codemods

Caution

Codemods modify code! Run them only on Git-tracked files, and commit or stash changes first.

From the registry

Recommended for the best UX. This downloads the package from the Registry.

npx codemod@latest <codemod-name>

For example:

npx codemod@latest @codemod/eslint-v8-to-v9

From source

npx codemod workflow run -w /path/to/folder/containing/workflow.yaml

Note

By default, codemods run in the current folder. Add -t /target/path to change it.

See the Codemod docs for all CLI commands and options.

License

MIT