Isn't all the ARC source code for Hacker News still available in one of the public depositories?

After edit: Here's a link about how to install ARC, which includes the forum software.

http://arclanguage.org/install

See this GitHub link for more information:

https://github.com/nex3/arc/blob/master/how-to-run-news

(I have never read the source code. I learn about how the software works here inductively, by using it.)