The thing that started it was a pull request review. My senior dev left a comment that said, simply, "where did this pattern come from?" and I realized I had absolutely no memory of writing that function. I'd been using Copilot and Claude heavily for a few months — not exclusively, just as assistants — and somewhere in the paste-and-tweak cycle, I'd lost the thread. I wasn't sure if I'd written the logic, adapted it, or just... accepted it. That bothered me more than I expected. So I decided to find out what would happen if I went all the way: thirty days, every line of production logic coming from an AI. No sneaking in my own loops. No "just this once I'll write the helper function myself." Whatever the model gave me, I shaped with prompts and pasted into the repo. The rules were specific, because vague experiments produce vague conclusions. I could write comments, docstrings, commit messages, and prompts. I could restructure and rename.…