How do they know that you wrote it yourself and didn’t just steal it?

This is a rule to protect themselves. If there is ever a case around this, they can push the blame to the person that committed the code for breaking that rule.

https://youtu.be/jN7mSXMruEo?feature=shared

Not op, but I really liked this video, as it explains quite a bit. It is of course a biased video, but still…

Clonezilla is the tool I use after all else has failed. I agree that it is difficult to use, but it can do things others can’t. I saved quite a few of my drives with this thing. So while I try to avoid having to use it, it still belongs in my toolkit.

Not sure if that is anything you might be interested in, but there is Lorien, which uses the godot game engine:

https://github.com/mbrlabs/Lorien