I've been using Hammerspoon for years, and have been incredibly happy with it. It is still actively maintained, has a large userbase, and has a lot of pre-built

I've been using Hammerspoon for years, and have been incredibly happy with it. It is still actively maintained, has a large userbase, and has a lot of pre-built solutions for things. Importantly, it's not just for window management. You can do a lot of powerful things with it.