motion-brief

Refine a natural-language description of a desired animation, transition, or motion effect — optionally with screenshots, diagrams, GIFs, or reference videos — into a precise, implementation-ready Motion Brief using canonical animation nomenclature. Use when the user describes motion loosely ("the cards should kind of cascade in", "make it feel bouncy like iOS"), shares a visual reference of an effect to reproduce, or asks to polish an animation idea into an agent-ready prompt.