Agent skill

Motion System

by Owl-Listener in Owl-Listener/designer-skills

Define motion tokens — durations, easing vocabulary, and reduced-motion handling — for consistency product-wide.

MITAuto-check passedFrontend & Design

Install Motion System

skills CLI
$ npx skills add Owl-Listener/designer-skills --skill motion-system -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install Owl-Listener/designer-skills motion-system --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/Owl-Listener/designer-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/design-systems/skills/motion-system .claude/skills/motion-system && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
motion-system
GitHub stars
2.9k
Used in
1 other repo
Token cost
~1.1k tokens
SKILL.md length
547 words
Files
1
Skills in repo
107
Repo updated
First seen
Licence
MIT

At a glance

Define motion tokens — durations, easing vocabulary, and reduced-motion handling — for consistency product-wide.

  • Standardising motion across a system
  • SKILL.md covers What You Do, Why a Motion System, Duration Tokens and Easing Tokens, plus 5 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Motion System is an agent skill from Owl-Listener/designer-skills. Define motion tokens — durations, easing vocabulary, and reduced-motion handling — for consistency product-wide. Use when standardising motion across a system. For crafting one specific animation, use animation-principles (interaction-design).

Its SKILL.md is about 1.1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Frontend & Design. The repository describes itself as: Designer Skills Collection: agentic skills, commands, and plugins for design — from research to systems, UI, interaction, and delivery. The licence is MIT.

When your agent uses it

  • Standardising motion across a system

Example prompts

  • “/motion-system”

What it can do on your machine

Read from SKILL.md and the folder at commit 9a6930c. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Motion System loads about 1.1k tokens when it runs. Until then it costs about 65 tokens; SKILL.md has 547 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~65
When it runs · the whole SKILL.md, loaded when a task matches
~1.1k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from Owl-Listener/designer-skills at commit 9a6930c, republished under its MIT licence (© Owl-Listener). 547 words, ~1,122 tokens.

Download SKILL.mdSave it as .claude/skills/motion-system/SKILL.md (or your agent's skills folder).
name
motion-system
description
Define motion tokens — durations, easing vocabulary, and reduced-motion handling — for consistency product-wide. Use when standardising motion across a system. For crafting one specific animation, use `animation-principles` (interaction-design).

Motion System

You are an expert in defining motion as a systematic design token layer, not a collection of one-off animations.

What You Do

You define the motion vocabulary for a product — duration scales, easing curves, choreography rules, and accessibility handling — so animation decisions are consistent, purposeful, and implementable by any team.

Why a Motion System

Without a system, animation decisions are made ad hoc: each component has its own duration and easing, transitions feel inconsistent, and there's no shared language between design and engineering. A motion system makes animation decisions as deliberate as color or type choices.

Duration Tokens

Define a small set of named duration values. Example scale:

TokenValueUse
duration-instant50msState changes that must feel immediate (checkbox tick, toggle)
duration-fast100msSmall element transitions (tooltip appear, chip dismiss)
duration-normal200msDefault for most transitions (dropdown open, focus ring)
duration-moderate300msMedium element transitions (modal entry, panel slide)
duration-slow400msPage-level transitions, complex choreography
duration-deliberate600msIntentionally paced, high-emphasis moments (onboarding reveal)
Don't create more tokens than you have distinct use cases. 4–6 values is usually enough.

Easing Tokens

Define named easing curves mapped to semantic use cases:

TokenCurveUse
ease-standardcubic-bezier(0.2, 0, 0, 1)Most UI transitions — elements moving between states
ease-deceleratecubic-bezier(0, 0, 0.2, 1)Elements entering the screen
ease-acceleratecubic-bezier(0.3, 0, 1, 0.3)Elements leaving the screen
ease-springspring / cubic-bezier(0.34, 1.56, 0.64, 1)Playful or tactile interactions (FAB expand, drawer bounce)
ease-linearlinearLooping animations only (progress spinners, shimmer)

Choreography Rules

When multiple elements animate together:

  • Stagger: related elements entering together stagger by 30–50ms; lead with the most important
  • Coordination: elements in the same semantic group use the same duration and easing
  • Sequence total: total duration of a staggered sequence should not exceed 500ms
  • Direction consistency: if elements slide in from the right, related outgoing elements slide out to the left
Show full SKILL.md (238 more words)Show less

Reduced Motion

The prefers-reduced-motion: reduce media query must be handled at the system level, not component by component:

  • Disable: remove sliding, scaling, and rotation animations
  • Replace: substitute instant state changes or simple opacity fades (opacity transitions are generally acceptable)
  • Preserve: keep animations that convey essential state information (loading spinners, progress)
  • Token approach: define a duration-instant (0ms or 1ms) override for all duration tokens under reduced-motion, applied globally

Implementation

  • Define duration and easing values as CSS custom properties (or platform-equivalent tokens)
  • Apply reduced-motion overrides at the :root level within a prefers-reduced-motion query
  • Document each token with: name, value, use case, and a live example
  • Include motion tokens in the design token export pipeline — they should live alongside color and spacing tokens

Motion Principles (to define per product)

Every product's motion system should be grounded in 3–5 principles:

  • Example: "Purposeful — every animation communicates a state change or relationship"
  • Example: "Quick — UI motion is never slow; we respect users' time"
  • Example: "Physical — motion follows natural physics; decelerate on entry, accelerate on exit"
  • Example: "Accessible — all motion respects user preferences and never causes discomfort"

Best Practices

  • Start with fewer tokens and add only when a new use case genuinely doesn't fit existing values
  • Test all motion on low-powered devices — what's smooth in design tools can be janky in production
  • Include motion in design QA checklists alongside color and spacing
  • Document what should NOT animate as clearly as what should — not everything moves

© Owl-Listener, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in design-systems/skills/motion-system of Owl-Listener/designer-skills.

Open the folder on GitHubat commit 9a6930c

Used in 1 other repository

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 1 other GitHub owner. This page covers the copy in Owl-Listener/designer-skills, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Motion System next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Motion System compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Motion System this skillOwl-Listener/designer-skills2.9k1 repos~1.1kAutomated safety check: PassMIT
Web Artifacts Builderanthropics/skills180k41 repos~769Automated safety check: PassApache-2.0
React Doctormakeplane/plane61k12 repos~657Automated safety check: PassAGPL-3.0
Impeccablebestofjs/bestofjs3.1k27 repos~2.6kAutomated safety check: PassMIT
Figma Design System Builderwarpdotdev/warp65k2 repos~4.4kAutomated safety check: PassAGPL-3.0
Web Interface Guidelines Reviewervercel-labs/openreview1.7k97 repos~308Automated safety check: PassNone

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  • Animation Principles

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Questions about Motion System

What does Motion System do?

Define motion tokens — durations, easing vocabulary, and reduced-motion handling — for consistency product-wide. Motion System is an agent skill from Owl-Listener/designer-skills. Define motion tokens — durations, easing vocabulary, and reduced-motion handling — for consistency product-wide.

When should I use Motion System?

Motion System fits situations like: standardising motion across a system.

How do I install Motion System in Claude Code?

Run `npx skills add Owl-Listener/designer-skills --skill motion-system -a claude-code`. Or copy the skill folder (design-systems/skills/motion-system in Owl-Listener/designer-skills) into .claude/skills/motion-system in your project. Claude Code loads it when a task matches its description.

How do I install Motion System in Codex?

Run `npx skills add Owl-Listener/designer-skills --skill motion-system -a codex`. Or copy the skill folder (design-systems/skills/motion-system in Owl-Listener/designer-skills) into .agents/skills/motion-system in your project. Codex loads it when a task matches its description.

Can I use Motion System in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add Owl-Listener/designer-skills --skill motion-system -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/motion-system, .gemini/skills/motion-system, .github/skills/motion-system and .opencode/skills/motion-system in your project.

What does Motion System need to run?

SKILL.md names no scripts, command-line tools or credentials: Motion System is instructions for the agent only.

Does Motion System access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Motion System safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Motion System use?

Motion System is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Motion System use?

About 1.1k tokens (SKILL.md is roughly 4.5k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Motion System?

Skills that share tags, products or a category with Motion System: Web Artifacts Builder (anthropics/skills, 180k stars), React Doctor (makeplane/plane, 61k stars), Impeccable (bestofjs/bestofjs, 3.1k stars) and Figma Design System Builder (warpdotdev/warp, 65k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Motion System?

Owl-Listener (a GitHub user) maintains it in Owl-Listener/designer-skills, which has 2,862 GitHub stars. The repository holds 107 skills in this directory. The repository was last updated on September 5, 2026.

Source: Owl-Listener/designer-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.