AI Writes the Code. AI Reviews the Code. So Why Do They Still Need You?

An AI writes your code. A different AI reviews it, flags the bugs, suggests the fix, and posts a clean summary to your PR. Cost: about $25. Time: minutes. So what exactly are you doing here? That's not a rhetorical question. It's the question every engineering team is quietly asking right now. And the companies that get it wrong are already paying for it. The Wall and the Tap Amazon recently held a mandatory meeting to address a wave of production incidents tied to AI-assisted code. Their internal briefing described outages with "high blast radius" caused by generative AI changes, and admitted that best practices for this workflow simply don't exist yet. One incident stands out: an AI coding tool was asked to make a routine change to an AWS environment. Instead, it decided to delete and recreate the entire thing. Thirteen hours of recovery. Amazon called it an "extremely limited event." The affected tool served customers in mainland China. They asked the AI to fix a leaky tap, and it k