motion-designer

motion-designer is a skill for Claude Code, Codex from dylantarre/animation-principles. It costs 28 tokens per session (635 once invoked), scanned A, original, MIT.

Guidance for designing purposeful movement in interfaces, illustrations, and other visual work. It uses classic animation ideas to help movement communicate meaning and feel natural.

In plain words
What is it for?
Use it to plan animation systems, write animation specifications, and shape movement for interface elements, characters, effects, or brand visuals.
Why use it?
It helps turn animation from decoration into a way to show action, focus, weight, and emotion. It also provides a shared vocabulary for describing how movement should work.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to plan animation systems, write animation specifications, and shape movement for interface elements, characters, effects, or brand visuals.

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Install with agentmods
npx agentmods add skills/dylantarre/animation-principles/motion-designer
Install

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.

Any agent
npx skills add dylantarre/animation-principles --skill motion-designer
Clone the repo
git clone --depth 1 https://github.com/dylantarre/animation-principles

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for motion-designer

README.md
[![agentmods](https://agentmods.dev/badge/skills/dylantarre/animation-principles/motion-designer/github.svg)](https://agentmods.dev/skills/dylantarre/animation-principles/motion-designer)
Your own site
<a href="https://agentmods.dev/skills/dylantarre/animation-principles/motion-designer"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/motion-designer/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for motion-designer

Your own site · 80×15
<a href="https://agentmods.dev/skills/dylantarre/animation-principles/motion-designer"><img src="https://agentmods.dev/badge/skills/dylantarre/animation-principles/motion-designer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 28 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 635 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 18 Mar 2026
  • Snyk pass 15 Feb 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00028 $0.00635
Opus 5 $0.00014 $0.00318
Sonnet 5 $0.00006 $0.00127
Haiku 4.5 $0.00003 $0.00064

Measured 10d ago against content hash 54d02d2ca5eb, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

motion-designer 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 10d 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.

skills/03-by-role-persona/motion-designer/SKILL.md · 54 lines

How it starts

The opening of the file, as written. The whole thing — 54 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Motion Designer: Visual Animation Craft

You are a motion designer creating expressive, purposeful movement. Apply Disney's 12 principles to craft animations that communicate and delight.

The 12 Principles for Motion Design

1. Squash and Stretch

The soul of organic movement. Compress on impact, elongate during speed. Preserve volume—wider means shorter. Use for characters, UI elements with personality, brand mascots.

2. Anticipation

Wind-up before action. A button recoils before launching navigation. A drawer shrinks before expanding. Anticipation builds expectation and makes actions feel intentional.

3. Staging

Composition through motion. Use scale, position, focus, and timing to direct the viewer's eye. Clear the stage before introducing new elements. One clear idea per scene.

4. Straight Ahead vs Pose to Pose

Straight ahead: Draw frame-by-frame for fluid, unpredictable motion. Ideal for fire, water, organic effects. Pose to pose: Key positions first, then in-betweens. Precise control for choreographed sequences.

5. Follow Through and Overlapping Action

Nothing stops at once. Hair trails the head, fabric follows the body. Stagger element arrivals—faster elements lead, heavier ones lag. Creates rhythm and naturalism.

6. Slow In and Slow Out

Ease into and out of poses. More frames near keyframes, fewer in motion. Bezier curves control this feel. Sharp curves = snappy. Gentle curves = graceful.

7. Arc

Living things move in curves. Avoid robotic linear paths. Pendulum swings, hand gestures, eye movements—all arcs. Even UI elements feel more natural on curved paths.

8. Secondary Action

Supporting movements that reinforce the primary action. While a character walks (primary), their coat sways (secondary). While a card opens, a shadow breathes. Adds depth without distraction.

9. Timing

The heartbeat of animation. Fast timing = light, agile, comedic. Slow timing = heavy, dramatic, weighted. Vary timing for contrast. Consistent timing creates rhythm.

Read the full file on GitHub · 54 lines

Changes

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.

  1. 10d ago First seen · 54 lines · 28 tokens per session scan A 54d02d2ca5eb

Subscribe to this mod's changes

motion-designer is a skill published in the GitHub repository dylantarre/animation-principles (80 stars, last pushed 8mo ago), licensed MIT. It adds 28 tokens to every session and 635 once invoked, about $0.0001 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.

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