Both. So, if you - or other meatbags - write the code, AI agents can review it faster / more thoroughly (therefore: better) than human reviewers, finding more problems and proposing fixes.

If you accept every fix your reviewer proposes, human or AI, you’re an idiot. But if you ignore every bug a human or AI reviewer raises as a possibility, you’re an even bigger idiot. If your code has no bugs, you’re a liar.