The plugin system in BundleWrap is an easy way of integrating third-party code into your repository.
It's as easy as
bw repo plugin search <term>. Or you can browse plugins.bundlewrap.org.
You probably guessed it:
bw repo plugin install <plugin>
Installing the first plugin in your repo will create a file called
plugins.json. You should commit this file (and any files installed by the plugin of course) to version control.
You can update all installed plugins with this command:
bw repo plugin update
Removing a plugin
bw repo plugin remove <plugin>
Writing your own
See the guide on publishing your own plugins.