I would like a home assistant integration for proton calendar so that I can have my calendar be an input source to trigger automations. I think it would need to be an app inside of home assistant that you sign into with your proton account though because I don't want to have to make all of my calendars publicly subscribable. Home assistant is run locally on your own hardware, not the cloud, so I don't see why this would be a big security concern as long as you keep your home assistant server secure. home assistant would need to be able to read all of the data though (for automations), and it would also be nice if I could have my local home assistant voice assistant be able to add things to my Proton Calendar.