Start with an exact-text prompt contract
Separate required copy from the visual description. Put every required line in quotation marks, specify language, capitalization, line breaks, location and relative size, then say that no additional text should appear. Short copy is easier to verify than a paragraph.
- Headline: exact quoted text and maximum line count
- Hierarchy: headline, supporting line, label and CTA
- Placement: top-left, centered panel or product-side column
- Exclusion: no extra letters, logos or watermarks
