In case it's helpful, here's how I use hammerspoon:

* As a replacement for the classic caffeine app. [1]

* To provide shortcuts for window managements. [2]

* To shutdown bluetooth on sleep. Otherwise, devices I have setup to pair with both my mac and phone will tend to pair with the mac, even though it's asleep. [3]

1: https://gist.github.com/heptal/50998f66de5aba955c00

2: https://github.com/miromannino/miro-windows-manager

3: https://gist.github.com/ysimonson/fea48ee8a68ed2cbac12473e87...