Impressed by Lindy's Unique Self-Testing in AI Development

I have to say, I' m most impressed with Lindy's self-testing which I haven't come across in any AI dev environment before - maybe there are others that do this, I'm only a newbie? But I find it one of the most important aspects as I find with other AIs that they are overly optimiistic - that what they have coded works and hasn't introduced any unforeseen collateral damage. Ofthen when such errors are discovered way down the track, it's too late to know hwat caused it so the whole fix procedure becomes a mess