public channels source code?

I'm sure this is a ridiculous question but If I don't ask then I won't know.  Is the code available for the public channels?  Say I wanted to fork a channel based on the code of a public channel.  I am used to dealing in Kodi, and Plex etc where all the code is available to view or manipulate.  Even the code for Kodi is out there to download.  Granted, it's all in python.  But I would like to learn how to create a channel and some of these public channels would have code that would get an amateur like me a head start on the process.  Thanks.