Motion Performance

Use this Note to keep UI motion and generated video projects fast, accessible, and renderable.

Checks

• Animate transform and opacity first; treat layout and paint-heavy properties as exceptions that need proof.
• Define fixed dimensions, fps, and duration for video projects before render.
• Keep text within safe crop zones for 16:9, 9:16, and square variants.
• Add reduced-motion alternatives for UI surfaces that embed generated motion.
• Validate exported artifacts for existence, size, and playable MIME type before surfacing a download.

Backend Rules