<b_jonas> slashlearn euclid//Euclid is a short geeky game in which the goal is to do Euclidean compass and straightedge constructions in as few steps as possible. It runs in the browser, found at "http://www.euclidthegame.com/". It was popular among #esoteric regulars in 2016-07.

`edit <file> gives you a url, then in your browser: (1) Press Sync (unless making a new file) (2) Make your changes (3) Press Save (4) Paste the command line at the top into the channel.