I like the concept of redo, but is there actually a version that does not depend on a hole runtime environment like python, ideally something written just in plain C? I've come across this[0] but it's a WIP and development seems to go very slow.
"depression, it is still seen as some kind of mental and emotional weakness."
I am very sorry, but it is seen as such because it is a weakness. Not that it couldn't be overcome.
It may very well be caused by some physical condition, after all the first thing you get usually thought in a psychology course is that it is pointless to view the mind as some abstrakt thing that exists on it's own, you must always consider the biochemical part as well.
[0] https://github.com/Tharre/redo