Hammerspoon is great. I use it to manage windows (eg set vscode and a browser side-by-side when connected to an external display, full screen when not), add a hotkey to translate selected text with Deepl, to mute sound when the machine sleeps, and to launch a terminal with an fzf-based browser history searcher that beats Firefox’s hands down.

It’s easy to use and has great docs. Lua is fun to write. HS is a really nice project.