Version-sensitive. Every API name, SDK gate and browser-support claim below was verified on 2026-09-08 against primary sources. What against, and when, is in _jutsu/VERSIONS.md. If that date is old, re-verify before acting on a version number.

GSAP — Animation Engine

GSAP 3.15 (released 13 Apr 2026). Since 3.13 the entire library — including every former Club plugin (SplitText, MorphSVG, DrawSVG, ScrollSmoother, InertiaPlugin, MotionPathHelper, CustomEase…) — ships in the public gsap npm package and is free, commercial use included, under the GreenSock Standard "no charge" license. There is no Club paywall. GreenSock also publish official agent skills (MIT, 8 skills: core, timeline, scrolltrigger, plugins, utils, react, performance, frameworks): https://github.com/greensock/gsap-skills — worth installing alongside this sub-skill.

When to use GSAP