Hi,
We are going to release that documentation in a couple of weeks from now. In the mean time you could look at our current plugins (all of them are open source) and see how stuff gets done there.
You could also contact me directly at tsviatko.yovtchev at telerik.com and share some more details about what you are trying to do. I can provide additional information and draft documentation.
All the best,
Tsviatko Yovtchev
the Telerik team