The Wix CLI is a unified tool for both Wix apps and Wix-managed headless projects.
If you're working on an existing app project, you can identify which CLI it uses by checking a few key indicators.
Look for @wix/astro in your project's devDependencies.
Look for an extensions.ts file in your project's src folder.
If your project has these indicators, then it uses the Wix CLI documented in this reference.
If your project doesn't have these indicators, your app project uses the Legacy Wix CLI for Apps.