# gsap-greensock

Guides your coding agent in applying Disney's 12 animation principles with GreenSock tweens and timeline sequences.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 727 installs · ★ 124
- Author: dylantarre
- License: MIT · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/dylantarre/animation-principles/tree/HEAD/skills/09-by-tool-framework/gsap-greensock/SKILL.md
- Updated: 2025-12-30
- HTML: https://affpapa.org/en/nevibecode/skills/gsap-greensock

## What it does

This skill injects animation guidelines based on the GreenSock Animation Platform into your agent's context. It maps the 12 Disney animation principles directly to GSAP syntax, covering anticipation, staging, follow-through, timing, and squash-and-stretch behaviors.

Inside, the skill lays out exact patterns for `gsap.timeline()` and `gsap.to()` calls. The agent learns how to chain overlapping tweens with position markers like `"<"` or `"-=0.4"`, map motion along curves using `motionPath`, and pick built-in easing curves such as `power2.inOut` or `back.out(2)`.

Your project must provide the GSAP library itself. The generated code relies strictly on GreenSock features like `scaleX` and `transformPerspective`.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add dylantarre/animation-principles --skill gsap-greensock -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/gsap-greensock/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/gsap-greensock/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add dylantarre/animation-principles --skill gsap-greensock -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/gsap-greensock/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add dylantarre/animation-principles --skill gsap-greensock -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/gsap-greensock/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install dylantarre/animation-principles gsap-greensock
```

2. **Manually: put the files in place**
- File: `.github/skills/gsap-greensock/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add dylantarre/animation-principles --skill gsap-greensock -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/dylantarre/animation-principles --path skills/09-by-tool-framework/gsap-greensock
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/gsap-greensock/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add dylantarre/animation-principles --skill gsap-greensock -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/dylantarre/animation-principles/tree/HEAD/skills/09-by-tool-framework/gsap-greensock/SKILL.md

## When to use it
- build bounce and squash effects for interactive UI components
- orchestrate layered character movements using overlapping timeline offsets
- animate elements along curved paths with `motionPath`
- add anticipation before an element jumps or disappears

## Example prompts
- Create a button press animation in GSAP with anticipation and secondary icon rotation
- Animate this card along an arc path using GSAP motionPath and a custom ease
- Build a timeline sequence where the background blurs while the hero element scales up

## Source text · SKILL.md · MIT

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: 0c8e11f19c2f716d.

BEGIN THIRD-PARTY FILE 0c8e11f19c2f716d
````text
---
name: gsap-greensock
description: Use when implementing Disney's 12 animation principles with GSAP (GreenSock Animation Platform)
---

# GSAP Animation Principles

Implement all 12 Disney animation principles using GSAP's powerful timeline and tween system.

## 1. Squash and Stretch

```javascript
gsap.to(".ball", {
  scaleX: 1.2,
  scaleY: 0.8,
  yoyo: true,
  repeat: 1,
  duration: 0.15,
  ease: "power2.inOut"
});
```

## 2. Anticipation

```javascript
const tl = gsap.timeline();
tl.to(".character", { y: 20, scaleY: 0.9, duration: 0.2 }) // wind up
  .to(".character", { y: -200, duration: 0.4, ease: "power2.out" }); // action
```

## 3. Staging

```javascript
gsap.to(".background", { filter: "blur(3px)", opacity: 0.6 });
gsap.to(".hero", { scale: 1.1, zIndex: 10 });
```

## 4. Straight Ahead / Pose to Pose

```javascript
// Pose to pose with explicit keyframes
gsap.to(".sprite", {
  keyframes: [
    { x: 0, y: 0 },
    { x: 100, y: -50 },
    { x: 200, y: 0 },
    { x: 300, y: -30 }
  ],
  duration: 1
});
```

## 5. Follow Through and Overlapping Action

```javascript
const tl = gsap.timeline();
tl.to(".body", { x: 200, duration: 0.5 })
  .to(".hair", { x: 200, duration: 0.5 }, "-=0.4")  // overlaps
  .to(".cape", { x: 200, duration: 0.6 }, "-=0.45"); // more drag
```

## 6. Slow In and Slow Out

```javascript
gsap.to(".element", {
  x: 300,
  duration: 0.6,
  ease: "power2.inOut" // slow in and out
});
// Other eases: "power3.in", "power3.out", "elastic.out"
```

## 7. Arc

```javascript
gsap.to(".ball", {
  motionPath: {
    path: [{ x: 0, y: 0 }, { x: 100, y: -100 }, { x: 200, y: 0 }],
    curviness: 1.5
  },
  duration: 1
});
```

## 8. Secondary Action

```javascript
const tl = gsap.timeline();
tl.to(".button", { scale: 1.1, duration: 0.2 })
  .to(".icon", { rotation: 15, duration: 0.15 }, "<") // same time
  .to(".particles", { opacity: 1, stagger: 0.05 }, "<0.1");
```

## 9. Timing

```javascript
// Fast snap
gsap.to(".fast", { x: 100, duration: 0.15 });
// Gentle float
gsap.to(".slow", { y: -20, duration: 2, ease: "sine.inOut", yoyo: true, repeat: -1 });
```

## 10. Exaggeration

```javascript
gsap.to(".element", {
  scale: 1.5,        // exaggerated scale
  rotation: 720,     // multiple spins
  duration: 0.8,
  ease: "back.out(2)" // overshoot
});
```

## 11. Solid Drawing

```javascript
gsap.to(".box", {
  rotationX: 45,
  rotationY: 30,
  transformPerspective: 1000,
  duration: 0.5
});
```

## 12. Appeal

```javascript
gsap.to(".card", {
  scale: 1.02,
  boxShadow: "0 20px 40px rgba(0,0,0,0.2)",
  duration: 0.3,
  ease: "power1.out"
});
```

## GSAP Timeline Pattern

```javascript
const masterTL = gsap.timeline({ defaults: { ease: "power2.out" }});
masterTL
  .add(anticipation())
  .add(mainAction())
  .add(followThrough());
```

## Key GSAP Features

- `gsap.timeline()` - Sequence animations
````
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First 2861 of 3071 bytes. © dylantarre · MIT · https://github.com/dylantarre/animation-principles/tree/HEAD/skills/09-by-tool-framework/gsap-greensock/SKILL.md

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