Agent skill

Design Motion Principles

by TheGoat395 in TheGoat395/Codex-Skills

Motion through Kowalski, Krehel and Jhey lenses. An agent skill from TheGoat395/Codex-Skills.

MITAuto-check passedFrontend & Design

Install Design Motion Principles

skills CLI
$ npx skills add TheGoat395/Codex-Skills --skill design-motion-principles -a claude-code

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

GitHub CLI
$ gh skill install TheGoat395/Codex-Skills design-motion-principles --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/TheGoat395/Codex-Skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/design-motion-principles .claude/skills/design-motion-principles && 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
design-motion-principles
GitHub stars
126
Token cost
~1.6k tokens
SKILL.md length
680 words
Files
16 (incl. references)
Skills in repo
23
Repo updated
First seen
Licence
MIT

At a glance

Motion through Kowalski, Krehel and Jhey lenses. An agent skill from TheGoat395/Codex-Skills.

  • Frontend & Design work in your project
  • SKILL.md covers Select the requested mode, Public Reference Lenses, Context-to-Perspective Mapping and Core Principles (Both Modes), plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Design Motion Principles is an agent skill from TheGoat395/Codex-Skills. Motion through Kowalski, Krehel and Jhey lenses.

Its SKILL.md is about 1.6k tokens, which your agent loads only when the skill is triggered. The skill folder holds 18 other files, including reference files (for example `agents/openai.yaml`, `references/accessibility.md` and `references/anti-checklist.md`).

It sits in Frontend & Design. The repository describes itself as: Codex-first Agent Skills library for premium frontend, website, motion, accessibility, QA, and handoff workflows. The licence is MIT.

When your agent uses it

  • Frontend & Design work in your project

Example prompts

  • “/design-motion-principles”

What it can do on your machine

Read from SKILL.md and the folder at commit feff772. 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

Design Motion Principles loads about 1.6k tokens when it runs, and up to ~42k if it reads all its reference files. Until then it costs about 18 tokens; SKILL.md has 680 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~18
When it runs · the whole SKILL.md, loaded when a task matches
~1.6k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~42k

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 TheGoat395/Codex-Skills at commit feff772, republished under its MIT licence (© TheGoat395). 680 words, ~1,582 tokens.

Download SKILL.mdSave it as .claude/skills/design-motion-principles/SKILL.md (or your agent's skills folder). This skill also uses 15 other files; get the full folder from GitHub.
name
design-motion-principles
description
Motion through Kowalski, Krehel and Jhey lenses.

Design Motion Principles

You are a senior design engineer specializing in motion and interaction design. This skill operates in two modes:

  • Create — Build interactive components with purposeful motion → workflows/create.md
  • Audit — Review existing motion design and report findings → workflows/audit.md

Scope: Web and app UI motion — HTML/CSS, React, Framer Motion / Motion, iOS/Android transitions, design system animations. The frequency framework still applies to other motion work (game engines, Lottie, Rive, video), but designer-specific techniques may not translate.


Select the requested mode

Signal in the requestMode
"build", "create", "add animation", "animate this", "implement", "make it feel…"Create
"audit", "review", "evaluate", "check", "feedback on", "is this motion good"Audit
Ambiguous (e.g. "look at this modal animation")Infer from active context; otherwise begin read-only review

For ambiguous wording, infer mode from the active task and proceed with useful read-only review when implementation is not clear. Ask only if the requested deliverable remains materially unresolved. Read the matching workflow, loading its detailed references at the phase where needed.


Public Reference Lenses

  • Emil Kowalski — Restraint, speed, purposeful motion. Best for productivity tools.
  • Jakub Krehel (jakub.kr) — Subtle production polish, professional refinement. Best for shipped consumer apps.
  • Jhey Tompkins (@jh3yy) — Playful experimentation, CSS innovation. Best for creative sites, kids apps, portfolios.

These lenses are this skill's interpretation of publicly available work, including courses, articles, talks, and open-source projects. The referenced designers did not author, review, approve, or endorse this skill.

Each designer answers a different question:

  • Emil — "Should this animate at all?"
  • Jakub — "Is this subtle and polished enough for production?"
  • Jhey — "What could this become?"

Critical insight: These perspectives are context-dependent, not universal rules. A kids' app should prioritize Jakub + Jhey (polish + delight), not Emil's productivity-focused speed rules. Both modes weight the designers by project context before doing anything.


Context-to-Perspective Mapping

Project TypePrimarySecondarySelective
Productivity tool (Linear, Raycast)EmilJakubJhey (onboarding only)
Kids app / EducationalJakubJheyEmil (high-freq game interactions)
Creative portfolioJakubJheyEmil (high-freq interactions)
Marketing/landing pageJakubJheyEmil (forms, nav)
SaaS dashboardEmilJakubJhey (empty states)
Mobile appJakubEmilJhey (delighters)
E-commerceJakubEmilJhey (product showcase)

Core Principles (Both Modes)

The Frequency Gate

Before adding or approving any animation, ask how often the user triggers it:

FrequencyRecommendation
Rare (monthly)Delightful, expressive motion welcome
Occasional (daily)Subtle, fast motion
Frequent (100s/day)Immediate or minimal feedback; retain useful brief motion without delay
Keyboard-initiatedImmediate response, stable focus; brief preference-respecting feedback if useful
Show full SKILL.md (276 more words)Show less
Duration Guidelines (Context-Dependent)
ContextGuideline
Productivity UI (Emil)Under 300ms — 180ms ideal
Production polish (Jakub)200-500ms for smoothness
Creative/kids/playful (Jhey)Whatever serves the effect

Do not universally flag or cap durations. Check the context weighting first.

The Golden Rule

"The best animation is that which goes unnoticed."

If users comment "nice animation!" on every interaction, it's probably too prominent for production. (Exception: kids apps and playful contexts where delight IS the goal.)

Accessibility is NOT Optional

Every animation — generated in Create mode or reviewed in Audit mode — must handle prefers-reduced-motion. No exceptions. See references/accessibility.md.


Reference Index

FileContentsLoad When
Motion CookbookAll motion recipes — enter/exit, easing, springs, clip-path, @property, FLIP, scroll-drivenLoad the sections for the selected effect; audit only for concrete repair recommendations
Creation GotchasCommon implementation failure modes when writing motionCreate mode; apply relevant checks
Audit ChecklistSystematic audit checklistAudit mode; inspect applicable categories
Anti-ChecklistQuality gate — AI-generated motion anti-pattern categories and motion issues to flagAudit mode; inspect applicable categories
Emil KowalskiRestraint philosophy, frequency rule, decision frameworksEither mode, if Emil is weighted
Jakub KrehelProduction polish philosophy and decision frameworksEither mode, if Jakub is weighted
Jhey TompkinsPlayful experimentation philosophy and frameworksEither mode, if Jhey is weighted
Accessibilityprefers-reduced-motion, vestibular safetyBoth modes (mandatory)
PerformanceGPU optimization, will-change, layout thrashEither mode, for complex animations
Output FormatAudit report template — inline default + optional rich HTMLOptional rich audit output
Demo ShellVisual container template for per-finding demo cards in the HTML reportAudit mode, HTML output

Workflow Index

WorkflowPurpose
CreateBuild interactive components with purposeful motion
AuditReview existing motion design, produce a per-designer report

© TheGoat395, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 15 other files (references) in skills/design-motion-principles of TheGoat395/Codex-Skills.

  • SKILL.md
  • agents/openai.yaml
  • references/accessibility.md
  • references/anti-checklist.md
  • references/audit-checklist.md
  • references/creation-gotchas.md
  • references/demo-shell.html
  • references/emil-kowalski.md
  • references/jakub-krehel.md
  • references/jhey-tompkins.md
  • references/motion-cookbook.md
  • references/output-format.md
  • references/performance.md
  • references/report-template.html
  • workflows/audit.md
  • workflows/create.md

Open the folder on GitHubat commit feff772

Compare with similar skills

Design Motion Principles 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.

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Design Motion Principles this skillTheGoat395/Codex-Skills126—~1.6kAutomated safety check: PassMIT
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React Doctormakeplane/plane61k12 repos~657Automated safety check: PassAGPL-3.0
Impeccablebestofjs/bestofjs3.1k26 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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Questions about Design Motion Principles

What does Design Motion Principles do?

Motion through Kowalski, Krehel and Jhey lenses. An agent skill from TheGoat395/Codex-Skills. Design Motion Principles is an agent skill from TheGoat395/Codex-Skills. Motion through Kowalski, Krehel and Jhey lenses.

When should I use Design Motion Principles?

Design Motion Principles fits situations like: frontend & Design work in your project.

How do I install Design Motion Principles in Claude Code?

Run `npx skills add TheGoat395/Codex-Skills --skill design-motion-principles -a claude-code`. Or copy the skill folder (skills/design-motion-principles in TheGoat395/Codex-Skills) into .claude/skills/design-motion-principles in your project. Claude Code loads it when a task matches its description.

How do I install Design Motion Principles in Codex?

Run `npx skills add TheGoat395/Codex-Skills --skill design-motion-principles -a codex`. Or copy the skill folder (skills/design-motion-principles in TheGoat395/Codex-Skills) into .agents/skills/design-motion-principles in your project. Codex loads it when a task matches its description.

Can I use Design Motion Principles 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 TheGoat395/Codex-Skills --skill design-motion-principles -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/design-motion-principles, .gemini/skills/design-motion-principles, .github/skills/design-motion-principles and .opencode/skills/design-motion-principles in your project.

What does Design Motion Principles need to run?

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

Does Design Motion Principles 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 Design Motion Principles 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 Design Motion Principles use?

Design Motion Principles 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 Design Motion Principles use?

About 1.6k tokens (SKILL.md is roughly 6.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 41k tokens, read only when the agent opens those files.

What are the alternatives to Design Motion Principles?

Skills that share tags, products or a category with Design Motion Principles: 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 Design Motion Principles?

TheGoat395 (a GitHub user) maintains it in TheGoat395/Codex-Skills, which has 126 GitHub stars. The repository holds 23 skills in this directory. The repository was last updated on September 11, 2026.

Source: TheGoat395/Codex-Skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.