GSAP Scroll — ScrollTrigger Patterns

Flow: gsap-setup → gsap-animate → gsap-scroll → gsap-optimise → gsap-test Cross-reference gsap-animate for context/cleanup, gsap-optimise for batch/scrub tuning.

Companion: For ScrollTrigger API reference, invoke gsap-scrolltrigger. This skill covers scroll animation recipes only. Requires: greensock/gsap-skills

1. Basic Scroll Reveal

ctx = gsap.context(() => {
  const els = gsap.utils.toArray('.reveal', sectionRef.value)
  gsap.set(els, { y: 28, autoAlpha: 0 })