https://secure.phabricator.com/book/phabricator/article/arcanist_commit_ranges/

Has all kinds of things about rules, but I don't think it elucidates where these rules live. I used to have an .arcrc which I think had stuff in it, but it was on a laptop that sadly went back to the company that it belonged to when I left.

So yes, where can I configure rules for arc commit ranges (other than command line)?