在PHP MVC App中实现模块系统的最佳方法？

Im currently developing my own PHP MVC Framework. This application is for personal purpose, and may be release open source a day. I am implementing a modules system in the application. For example, the Core will run, and a user installs a "Artist" module (composed with a Entity, a Model, and a Controller) The user will have the ability to update the template. So at a moment, he will be writing for example : $this->app()->getModule('Artist')->getAll();Im currently developing my own PHP MVC Framewor