This is a boilerplate to create new plugins. FactBox basically is extended by new Artifact models. To keep one modular ecosystem, it's recomended insert those artifacts via plugin.
TODO
Add this line to your factbox's Gemfile:
gem "PLUGIN_NAME", git: "PLUGIN_GIT_URL"
So, in factbox root you can:
$ rails g install PLUGIN_NAME
This will create some migrations, so you should run:
$ rails db:migrate