I don’t believe Q uses GitHub. One of the anons or several place his posts there.
my bet is that the person posting is not Q himself but a cut out who has received instructions on what to post. I am guessing that this is a military cyber psyops operation from within government. I think he has approval from the white house. I am guessing that most of our intelligence agencies have been penetrated in the upper echelons with people loyal to other nation States and politically powerful private parties. so those involved in the release of this information are very secretive about it with in the agency.