Based on the talk by Ryan Hipple from Schell Games at Unite Austin 2017.
http://www.roboryantron.com/2017/10/unite-2017-game-architecture-with.html?m=1
You can edit the types that it generates by editing the settings file at Assets/Scripts/Editor/Resources/Settings
Very basic sample at https://github.com/JurjenBiewenga/UnityGameArchitectureSample