Packages are of the GitHub Pro features I’ve put off learning for far too long, and - thinking about it - the primary thing I’ve created worth packaging (imo) continues to be my blog’s custom CSS and JS files, respectively.
Just for fun, I was noodling and thought I’d put a feeler out instead of diving headfirst into documentation I’ve already blown off repeatedly: if we were to “publish” Write.as themes (presumably just a custom.css file and custom.js file,) which package registry would be most appropriate? npm?