I got 2x faster with AI. I also got 2x better at shipping bugs I couldn't catch.

I stared at a bug for 45 minutes last week that Claude had introduced three days earlier. The function looked fine. It passed my review. It even passed a quick manual test. It broke in production because the AI had confidently used an API method that doesn't exist in the version we were running, and I had no idea because the code read like it was written by someone who knew what they were doing. That's the thing nobody says out loud: AI makes you faster and simultaneously makes you worse at catc