GitHub private repo's?
Therein lies a big problem.
Lots of us who had private repos have moved them from GitHub the moment that the MS takeover was announced.
Mine has gone. It had more than 400 files in it and not a bit of YAML in sight. No JSON either and just a few lines of XML.
A load of hot air if you ask me. I wonder how many of those YAML files were simply slightly modified copies of those publised on any of the more reputable code help sites such as StackOverflow?