Discovered Harper in this blog post but not sure how to get it to work. Installed with homebrew, evaluated the default lisp they have on their site and… ok, now what? I don’t see any Harper-related commands. Has anyone figured it out?

Short version: Harper is a frontend to Server Language Protocol (SLP). Emacs has a built-in SLP called Eglot. This means you use Eglot on Emacs to run Harper, so the interactive (M-x) command is Eglot (and it helps if you spell it correctly đŸ¤Ļ‍♂ī¸). The E-Lisp configuration they have on their website (above) works fine, provided Eglot is configured to run and you have Harper installed.

I will expand later after I experiment some more.