Exactly.... -> Unit tests. Integration tests. UI tests. This is how code should be verified no matter the author. Just today I told my team we should not be reading every line of LLM code. Understand the pattern. Read the interesting / complex parts. Read the tests.

But unit and integration tests generally only catch the things you can think of. That leaves a lot of unexplored space in which things can go wrong.

Separately, but related - if you offload writing of the tests and writing of the code, how does anybody know what they have other than green tests and coverage numbers?