What problem does it solve? Writing correct GSAP animations requires knowing the right tween methods, transform aliases, easing names, and accessibility patterns; this Skill provides the official core API guidance so generated animation code follows GSAP best practices. ## Core Features & Use Cases - Core Tween Methods: Covers gsap.to(), from(), fromTo(), and set() with correct vars like duration, delay, ease, stagger, overwrite, and immediateRender. - Transforms & Easing: Documents transform aliases (x, y, scale, rotation, xPercent), autoAlpha, svgOrigin, directional rotation, built-in eases, and CustomEase for custom curves. - Responsive & Accessible Animation: Uses gsap.matchMedia() for breakpoints and prefers-reduced-motion so animations revert cleanly and respect user accessibility settings. - Use Case: When a user asks to animate a card grid entrance in React or vanilla JS, the Skill produces a staggered gsap.to() tween with autoAlpha, a power ease, and a matchMedia block that disables motion for reduced-motion users. ## Quick Start Use the gsap-core skill to write a staggered fade-in animation for my card elements that respects prefers-reduced-motion.