A hammerspoon config with a bunch of custom spoons (sleep timer, resolution changer, paywall buster, safari hotkey utilities, window management with undo, etc).
Write a Spoon that implements hotkey CheatSheet-esque overlays. Make it so it can be applicable-aware, and can load different lists for different apps. Also, provide a hs.chooser interface.
When disconnecting from an external display (connected via an eGPU), the menubar menu options should update to display options for only the internal Macbook Pro Color LCD, but instead still show the options for the external display.