Your AI is confident. Your AI is wrong. You shipped it anyway.

A confession I told Claude to write tests first. Claude said "understood." Then Claude spawned a subagent. The subagent said "this is simple enough, I don't need tests." It shipped. I approved. The tests that didn't exist didn't fail. Everything looked fine. It was not fine. The fun part: I had three plugins installed specifically to prevent this. They were all working correctly. In the main session. Where the work wasn't happening. The problem with being confident AI agents have a specific fail