You can implement custom commands and hooks to trigger. It's even possible to call native Win32 APIs in your own implementations. For example, to always move a Notepad window to the (100, 100) coordinates on your screen(s), using the low-level SetWindowPos function

Great job. Looks really interesting and useful. And a fun excuse to write Lisp.

I really appreciate it when APIs give you high-level functionality but keep the door open to lower-level APIs when you really need them.