Third-Party Plugins

Altis is built atop the open-source WordPress CMS. In addition to custom Altis modules, you can also use third-party WordPress plugins to take advantage of the open-source ecosystem.

There are two ways to add plugins to your project: either by managing them via Composer, or commit the plugins to your project (or use submodules).

Managing Plugins via Composer

Plugins can be managed via Composer dependencies, similar to how Altis modules are added.

Some plugins are natively available via Composer, and can be found on Packagist via the wordpress-plugin type.

The starter project automatically configures Composer to install plugins into the correct place for your project, but if you started from scratch you may need to configure this yourself. First, install composer/installers as a dependency, which will allow installing these types of projects. Next, configure Composer under extra.installer-paths in your composer.json to place them into the correct directory:

"extra": {
	"installer-paths": {
		"content/plugins/{$name}/": [
		"content/themes/{$name}/": [

Some plugins are not available natively on Packagist, and are available only via the Plugin Repository. These can be installed via a third-party Composer repository called WordPress Packagist.

To set up and configure WordPress Packagist, first add the custom repository to your project's composer.json under a repositories key:

"repositories": [

To install plugins, you can now use composer require wpackagist-plugin/{plugin-name}, where {plugin-name} is the "slug" of the plugin from the Plugin Repository to install.

For example, Akismet is available at, so the "slug" of the plugin is akismet. You can install this with:

composer require wpackagist-plugin/akismet

Managing Plugins Manually

Third-party plugins should be placed inside the content/plugins/ directory. Each plugin should be contained in its own directory within the plugins directory, with one file containing a comment header.

Generally speaking, we recommend using Git submodules if you're installing modules manually. This reduces the amount of code necessary in your repository, and makes managing updates much easier.