# Plug-in Usage

A plug-in provides additional capability to the Grails runtime and can be created with the create-plugin command:

    grails create-plugin simple

This will create a plug-in project which can then be packaged with package-plugin:

    grails package-plugin

And installed into Grails applications with install-plugin:

    grails install-plugin ../grails-simple-0.1.zip

Refer to the user guide topic on Plug-ins for more information.