Brilliant insight! I knew the prompts were iterative, but I never thought of having it iterate on the prompt itself, before producing a result! My favorite use of ChatGPT so far has been writing back cover copy for books. I give it the TOC, or the theme and some major characters, and it creates something that is at least as accurate as most professional editors I worked with. Because my idea of a back cover would be a lot like your idea of a headline: I wrote these stories, other people liked them, and you might like them, too.