It would be really great to be able to delete all events from a certain calendar. In my case, I have a vacation and a school calendar. Right now, I either have to delete all recurring School events at the beginning of vacations and create them newly at the end of vacations, or I have to manually delete them one by one to have them still recurring after vacations.

In Google Calendar, I solved this problem with App Scripts: https://github.com/bananenbroetchen/GCal-Bulk-Event-Deleter

For this and other, maybe unique, but individual problems, it would be really really great to be able to create Community Plugins (Like e.G. in Obsidian). I think this will boost the proton community to another level and this could be infinitely better for problem solutions like mine with the calendar.

Alternatively, it would be great to have some kind of API to do this stuff yourself.