Motion Design Skill teaches AI coding agents how to plan interface animation using timing, easing, choreography, emotional intent, and animation principles adapted for user interfaces. It is for developers using systems such as CSS, Framer Motion, GSAP, Lottie, or springs to create UI motion and feedback effects.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add LottieFiles/motion-design-skill --skill motion-designgit clone --depth 1 https://github.com/LottieFiles/motion-design-skillWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/lottiefiles/motion-design-skill/motion-design)<a href="https://agentmods.dev/skills/lottiefiles/motion-design-skill/motion-design"><img src="https://agentmods.dev/badge/skills/lottiefiles/motion-design-skill/motion-design.svg" alt="Measured on agentmods" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high Memory Poisoning · line 117 Skill manipulates agent memory, state, or stored context. Memory corruption can alter personality, override safety rules, or cause unpredictable behavior.Fix: Protect agent memory and state from modification by untrusted content. Use read-only memory for critical instructions and validate all state changes.
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00082 | $0.03371 |
| Opus 5 | $0.00041 | $0.01685 |
| Sonnet 5 | $0.00016 | $0.00674 |
| Haiku 4.5 | $0.00008 | $0.00337 |
Grade A, and why
motion-design scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
5 near-identical copies found in the catalogue:
- motion-design — 100% identical, 0 lines differ
- motion-design — 100% identical, 0 lines differ
- motion-design — 100% identical, 0 lines differ
- motion-design — 100% identical, 0 lines differ
- motion-design — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 316 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Motion Design Skill
When to Apply
Use this skill when:
- Creating UI animations (buttons, cards, modals, page transitions)
- Designing micro-interactions and feedback animations
- Building loading, success, or error states
- Animating illustrations or decorative elements
- Planning scroll-triggered or progress-based animations
- Establishing brand motion identity
- Choreographing multi-element sequences
Decision tree:
- Does it serve a functional purpose (feedback, guidance)? → Timing rules for responsiveness
- Does it express brand personality? → Motion Personality archetypes
- Does it tell a story or guide attention? → Disney principles + choreography
- Is this a complex multi-element scene? → 1/3 Rule + stagger patterns
Quick Reference: 8-Step Checklist
Before creating any animation:
- Emotional target? — joy, calm, urgency, elegance
- Motion Personality? — Playful, Premium, Corporate, Energetic
- Primary property? — position, scale, rotation, opacity
- Duration? — see duration table below
- Easing family? — entrance=decelerate, exit=accelerate
- Hero element? — apply staging principles
- Secondary + ambient layers? — add richness
- 1/3 rules? — motion distance, simultaneous elements
Three Pillars (CRITICAL)
Every animation must satisfy three pillars before any technical decisions:
| Pillar | Question | Drives |
|---|---|---|
| Emotional Intent | What should the viewer FEEL? | Easing, timing, amplitude |
| Visual Narrative | What's the micro-story? | Setup → Action → Resolution |
| Motion Craft | How do we make it believable? | Physics, secondary motion, paths |
Three motion layers (flat animation = missing layers):
- Primary: Main action the viewer follows
- Secondary: Supporting richness (shadows, icons shifting)
- Ambient: Background life (gradients, subtle pulses)
Deep dive: director/core-philosophy.md
What ships with it
16 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
- director/choreography.md 3.0 KB
- director/context-adaptation.md 3.0 KB
- director/core-philosophy.md 1.8 KB
- director/decision-framework.md 2.8 KB
- director/disney-principles.md 3.1 KB
- director/emotion-mapping.md 2.8 KB
- director/motion-personality.md 2.9 KB
- director/narrative-structure.md 2.4 KB
- patterns/ambient-continuous.md 2.8 KB
- patterns/entrance-exit.md 2.8 KB
- patterns/multi-element.md 2.3 KB
- patterns/state-feedback.md 3.0 KB
- reference/property-selection.md 2.9 KB
- reference/quality-checklist.md 2.0 KB
- reference/timing-easing-tables.md 2.8 KB
- reference/troubleshooting.md 2.6 KB
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 8d ago First seen · 316 lines · 82 tokens per session scan A 8729ecbc7e57
motion-design is a skill published in the GitHub repository LottieFiles/motion-design-skill (1,544 stars, last pushed 3mo ago), licensed MIT. It adds 82 tokens to every session and 3,371 once invoked, about $0.0004 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other skills, from other repositories
ripple-press
Acknowledge a tap/click with a ripple that blooms from the exact press point. Fast and low-opacity so it reads as feedback, not decoration. No ripple under prefers-reduced-motion (native :active covers it). Avoid on destructive actions and text links.
gradient-text
Give one short headline quiet premium emphasis: a slow on-brand gradient drifts through the type. One phrase per view; never body copy (readability). Pure CSS; falls back to a solid brand color under prefers-reduced-motion.
magnetic-button
Make a primary button feel alive by gently pulling it toward the cursor as it approaches, then springing back. Keep it subtle and reserve it for one or two primary actions. Disabled on touch and under prefers-reduced-motion. Do not use it on dense UIs full of buttons.
scroll-reveal
Reveal content as it scrolls into view — a gentle rise + fade, once per element. Use to give a long page calm rhythm. Honors prefers-reduced-motion and supports staggering. Do not delay above-the-fold content, and keep at most a few elements animating at once.
lottie-fab
A floating action button that morphs open — Lottie JSON. A Lottie (JSON) animation — portable motion that plays identically on web and app via lottie-web. Honors prefers-reduced-motion (don't autoplay). Reserve Lottie for motion that earns its 160KB runtime.
loading-shimmer
Skeleton placeholders with a soft sweeping shimmer while content loads. Use to fill space for cards/lists/profiles that are still loading and make the wait feel shorter. Honors prefers-reduced-motion (static skeleton). Only show while real content is loading — never as decoration.