Determine Which CLI Your Project Uses

App projects use one of three project structures. Before you follow any guide for an app project, identify which structure it uses, because the structure decides which commands you run and how your extensions are declared.

Check your configuration files and dependencies

To find which structure your project uses, check the following against the table below:

1. The configuration files in your project's root folder.
2. The dependency in your project's package.json file.

Structure	Configuration files in the root folder	Dependency in package.json
The new Wix CLI, described in About the App Project Structure	wix.config.mjs	@wix/custom-extensions
The Astro-based structure, described in Astro-based App Project Structure	wix.config.json and astro.config.mjs	@wix/astro
The Legacy Wix CLI for Apps, described in Legacy App Project Structure	wix.config.json	@wix/cli-app

Move to the new structure

Both earlier structures have a migration path to the new Wix CLI. To choose yours, see About Migrating an App to the New Wix CLI.