Genie add-on add new skills

Hi all.

I recently installed the Genie add-on on my dockerized HA setup and I can now control my devices using voice commands.

Now I would like to extend it with new skills (and also change some existing ones), but I don’t know how to do it. The documentation does not seem to be in line with how the add-on installed it.

Does anyone has some pointers on this subject?