I started doing that with my own project after I reverted a (correct) change a few weeks later because I forgot to write down the original reasoning anywhere. No other contributors so far, so I can't say how much it helps on that front, but it has helped me a lot and I feel safer making big changes without fearing I'll break anything.

The entry point docs are here: https://github.com/trane-project/trane/blob/master/src/lib.r...