A serverkit plug-in is provided as a gem.
Serverkit calls Bundler.require(:default) before running an action,
so you can add any behaviors to serverkit via gems defined in Gemfile.
For example, serverkit-rbenv gem
adds a custom resource type named rbenv_ruby by defining Serverkit::Resources::RbenvRuby class.
Serverkit finds Serverkit::Resources::FooBar resource class from type: "foo_bar".
# Gemfile
gem "serverkit"
gem "serverkit-atom"
gem "serverkit-defaults"
gem "serverkit-homebrew"
gem "serverkit-karabiner"
gem "serverkit-rbenv"
gem "serverkit-login_items"