Ironically, AI is really good at the adding tests later thing. It can really help round out test coverage for a piece of code and create some reusable stuff that can inspire you to test even more.

I’m not a super heavy AI user but I’ve vibe coded a few things for the frontend with it. It has helped me understand how you lay out react apps a little better and how the legos that React gives you work. Probably far less than if I had done it from scratch and read a book but sometimes a working prototype is so much more valuable to a product initiative than learning a programming language is that you would be absolutely burning time and value to not vibe code the prototype