Everyone talks about how much time AI saves. True. But nobody talks much about the hours you lose to AI mistakes. I've been using Claude Code daily for months. My workflow has fundamentally changed, I'm faster, I ship more consistent code. All of that is true. This article is the counterpart – the moments where I sat at my terminal thinking: "What on earth did that just do?" Not to bash AI. But a realistic picture is more useful than endless hype. The aggressive refactor I had a Vue component spread across three files – historically grown, not pretty, but functional. My request was harmless enough: "Clean this up and consolidate the types." Claude Code did that. And then some more. And then some more. At the end I had an elegant, clean component – and four features that had quietly disappeared. Including an edge case for loading empty content that wasn't documented anywhere, but was silently expected by two other parts of the app. No test, no comment, no hint.…