I built a plain-text "art director" so my AI images stop changing when I edit them

If you make images with AI, you know the specific pain: the first generation is easy. Editing it is where everything falls apart. I make YouTube thumbnails and playlist covers. I'd get a result I liked, ask to change one small thing — "make the jacket blue" — and get back a completely different picture. New face. New background. New lighting. The...