Fixing Motion Performance

The skill audits and fixes animation performance issues including layout thrashing, compositor property misuse, scroll-linked motion problems, and inefficient filter effects across CSS and JavaScript animations. It serves developers and designers who need to diagnose and resolve stuttering animations, janky transitions, or performance bottlenecks in UI motion work. The skill identifies violations against nine rule categories—from critical never-patterns like interleaving layout reads and writes to medium-priority issues like unnecessary blur effects—and provides concrete code-level fixes without requiring animation library migrations.