enhance-motion — Coherent Motion for an Existing App

Degree of freedom: MIXED. Tier and token judgment [HIGH freedom]; reduced-motion, GPU-only, and verify [LOW freedom — run exactly].

Add motion to an app that already exists, without fragmenting its visual language. The failure mode this prevents: bolting on one hero animation, three different easing curves, and a heavyweight library where a CSS class would do — motion that fights the design system instead of reinforcing it.

Motion must be coherent, purposeful, reduced-motion-safe, and 60fps. Pick the lightest tool that fits each interaction. Every animation gets its timing and easing from a motion-token SSOT, not ad-hoc magic numbers.

This skill applies motion and verifies it. For a from-scratch motion cookbook (no existing system to respect), use design-motion. For pure animation-perf triage, use audit-performance.

Before any browser interaction, read protocol-browser-anti-stall and apply it.