termux-calendar?

It would be useful to have a command like this:

termux-calendar add \
    --title 'My meeting' \
    --id 'Google:Work Calendar' \
    --start "$unix_time_start" \
    --stop "$unix_time_stop" \
    --location "$latitude,$longitude" \
    --description 'A long horrible meeting' \
    --all-day 'false'

It seems straightforward with the intents documented here https://developer.android.com/guide/topics/providers/calendar-provider.html#intents, but I don't have much experience packaging code like this into java/kotlin apps, so not sure how to start. I tried this with the adb/termux am command, but I think it is getting rejected b/c of permissions.

Start with the proposed termux-calendar command and the Android Calendar Provider intents documented in the issue; compare them with the adb/Termux am approach and its permission behavior. Done means exposing calendar-event creation with the listed title, calendar id, start and stop times, location, description, and all-day options through a Termux command.