My AI shipped a 1,199-line change nobody understood. I built a CLI that scores how fragile it is.

An essay made the rounds this week: "AI usage generates a fragile codebase." The argument is simple. AI writes code faster than humans can review it, so the bottleneck moved from writing to the review gate. Code that looks right, passes the easy tests, and ships before anyone understands it.

I have felt that exact failure mode. A 1,199-line change lands, the tests are green, the diff is too big to read properly, and two weeks later nobody on the team can explain what half of it does. The review happened.…