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mcp/skillhub

Agent Skill

Animate Expo skill

animate-expoemilkowalski/skillsskills/animate-expo/SKILL.md

Build animations in React Native and Expo, making the decisions in the order that determines whether they feel right — should it animate, which thread it runs on, which properties, spring or timing, how the gesture hands off, how it degrades. Writes the implementation with Reanimated, Gesture Handler, Expo Router and expo-haptics. Use when animating anything in an Expo app, adding gestures, sheets, screen transitions, press feedback or haptics, or fixing motion that stutters on device. For web animation use `animate`.

48kMIT

always on

112 tokname + description

once used

4,207 tokSKILL.md body

bundled files

116 KB

installs

129kskills.sh

Install the Animate Expo skill

Skills CLI (Claude Code, Codex, Cursor and others)

npx skills add https://github.com/emilkowalski/skills --skill animate-expo

Claude Code, by hand (all projects)

git clone --depth 1 https://github.com/emilkowalski/skills.git /tmp/skills
mkdir -p ~/.claude/skills
cp -R /tmp/skills/skills/animate-expo ~/.claude/skills/animate-expo

For one project only, copy the folder into .claude/skills/ in that project instead. The agent picks it up when a task matches its description.

What it costs your context

Agent Skills load in three steps. Tokens counted with the o200k tokenizer; your model's count will differ a little.

WhenWhat loadsCost
Every sessionName and description112 tok
When the agent uses itThe SKILL.md instructions4,207 tok
Only if opened1 bundled files (16 KB)varies

Until it is used, animate-expo costs about 12× less than the median MCP server we measured (1,362 tokens on every turn). Installing all 15 skills from emilkowalski/skills would load 1,400 tokens of descriptions. Skills vs MCP study

Checks

Our checks found nothing to flag: it follows the Agent Skills specification's naming and size guidelines and doesn't pipe downloads into a shell.

Checked 2026-10-22 · method

What's inside

The headings of its SKILL.md. Read the full file on GitHub.

  • Building Animations in Expo
  • Initial Response
  • Operating Posture
  • Hard Rules
  • The Build Sequence
  • 1. Should this animate at all?
  • 2. What is the purpose?
  • 3. Pick the tool — cheapest that works
  • 4. Pick the properties
  • 5. Timing or spring
  • 6. Keep it off the JS thread
  • 7. Press, not hover
  • 8. Haptics
  • 9. Reduced motion and accessibility
  • Setup that silently breaks motion
  • 120fps
  • Recipes
  • Never Ship
  • Output
  • Tone

More skills from emilkowalski/skills

All skills in this repo
  1. emil-design-engemilkowalski/skills

    This skill encodes Emil Kowalski's philosophy on UI polish, component design, animation decisions, and the invisible details that make software feel great.

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  2. review-animationsemilkowalski/skills

    Reviews animation and motion code against a high craft bar derived from Emil Kowalski's design engineering philosophy. Default to flagging; approval is earned.

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  3. apple-designemilkowalski/skills

    Apple's approach to interface design and fluid, physical motion, translated for the web. Use when building or reviewing gesture-driven UI, spring animations, drag/swipe/sheet interactions, momentum and interruptible transitions, translucent materials and depth, typography (optical sizing, tracking, leading), reduced-motion, or the design foundations (feedback, spatial consistency, restraint) behind Apple-style interfaces.

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  4. animation-vocabularyemilkowalski/skills

    Reverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term ("the bouncy thing when a popover opens" → Pop in; "the iOS rubber-band scroll" → Rubber-banding). Use when the user asks "what's it called when…", or describes a motion effect without knowing its name and wants the right word to prompt an AI or designer with. For naming an effect, not designing or building one.

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  5. improve-animationsemilkowalski/skills

    Survey a codebase's animation and motion code as a senior motion advisor, then produce a prioritized audit and self-contained implementation plans for other agents (or cheaper models) to execute. Read-only on source code — it plans improvements, it does not apply them. Use when the user asks to "improve the animations", "audit the motion", "make this app feel better", or wants a roadmap of animation fixes rather than a review of a single diff.

    214k97 tok idle · 1,748 in use
  6. find-animation-opportunitiesemilkowalski/skills

    Search a codebase or UI for places that don't animate but should, and reject everything that shouldn't. Read-only; it proposes motion with exact values, it does not implement it. Use when the user asks "what could be animated here?" or wants to "make this feel more alive". For fixing existing animations, use improve-animations or review-animations instead.

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  7. pick-ui-libraryemilkowalski/skills

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  8. prototypeemilkowalski/skills

    Build multiple genuinely different versions of a UI piece you describe, rendered behind a visual picker so you can flip through them live and promote the one that feels right. Only runs when explicitly invoked; it does not trigger on its own.

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