A defect I wrote down and didn't fix
A second model identified a problem with my configuration. I recorded the correction, but two days later the unchanged setting caused a deployment to the wrong account.
Notes on what breaks
Building before understanding
I had used TypeScript in projects without understanding what it was doing. Learning it directly showed me the difference between producing code and being able to explain it.
Learning to ride with AI
Anthropic's economic scenarios treat jobs as collections of tasks. Reading them changed what I think I should be learning from a software engineering degree.
Understanding the websites I build
A Content Security Policy I wrote broke a client's site a week after launch. What it showed me was the gap between producing a working site and understanding why it works.