Whatever notetaking app you use? If it’s just jotting down some things I came up with on the go it won’t be anything I need a whole ass IDE for, and I don’t think I do anything like that often enough to need even a lightweight plaintext editor for that. I guess you could try use vim with termux, sounds like a pain in the arse with a phone keyboard though…

Then the switch only serves to notify your loved ones that you’re having an emergency. What if the switch is to, say, leak some documents to the public? You can’t take that back so presumably you only want to do it after you die.

There could be reasons other than death preventing you from accessing the system to update this though. Stranded somewhere, power outage, unexpectedly arrested and incarcerated, medical emergency, etc.