How a Children's Book AI Project Revealed Key Flaws in Image Prompt Design

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A team building a personalized AI picture book tool — which places a single child's photo consistently across 10 pages — spent three weeks debugging recurring visual errors. They discovered that mentioning something in a prompt, even to forbid it, causes the image model to generate it, a phenomenon they call 'mention is summon.' Overloaded prompts with repeated negations like 'do not duplicate' consistently produced duplicates, while a single plain instruction resolved the issue immediately. They also found that naming an object in its canonical form, such as 'sandcastle,' overrides descriptive adjectives, so depicting a non-standard state requires describing it without naming the object at all. Additionally, comma-separated actions in prompts were interpreted as parallel subjects, silently generating extra figures across the majority of their 310-page library.

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