AI doesn't write bad code. It writes plausible code — so I tried to break my own AI-built app (opens in new tab)

Disclosure: I work on one of the tools in this post (create-microservices-app). But the experiment, commands, and outputs below are real, and the pattern at the end works no matter what stack you're on — that's the part I actually want you to take. If you ship with Claude Code, Cursor, or Codex, you know the feeling. The agent gets you 70% of the way in minutes. It compiles. The diff looks reasonable. You merge it. And then there's the quiet doubt: did it actually get the hard 30% right — aut...