animation-motion

animation-motion is a skill for Claude Code from fernando-bertholdo/4-successful-AI-life. It costs 33 tokens per session (4,180 once invoked), scanned A, original, MIT.

A guide for designing and reviewing movement in web interfaces, such as transitions, animated buttons, and drag gestures.

In plain words
What is it for?
Choosing animation timing, improving performance, supporting reduced-motion settings, and reviewing gesture interactions.
Why use it?
It helps avoid motion that feels confusing, performs poorly, or creates accessibility problems for people who prefer less animation.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the ui-excellence plugin — 13 skills shipped together

Good fit Choosing animation timing, improving performance, supporting reduced-motion settings, and reviewing gesture interactions.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/fernando-bertholdo/4-successful-ai-life/animation-motion
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 fernando-bertholdo/4-successful-AI-life --skill animation-motion
Clone the repo
git clone --depth 1 https://github.com/fernando-bertholdo/4-successful-AI-life

Made for: Claude Code.

Or install ui-excellence, the plugin that ships this one along with the rest of its 13 skills.

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 animation-motion

README.md
[![agentmods](https://agentmods.dev/badge/skills/fernando-bertholdo/4-successful-ai-life/animation-motion/github.svg)](https://agentmods.dev/skills/fernando-bertholdo/4-successful-ai-life/animation-motion)
Your own site
<a href="https://agentmods.dev/skills/fernando-bertholdo/4-successful-ai-life/animation-motion"><img src="https://agentmods.dev/badge/skills/fernando-bertholdo/4-successful-ai-life/animation-motion/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 animation-motion

Your own site · 80×15
<a href="https://agentmods.dev/skills/fernando-bertholdo/4-successful-ai-life/animation-motion"><img src="https://agentmods.dev/badge/skills/fernando-bertholdo/4-successful-ai-life/animation-motion.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 33 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,180 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.
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 $0.00033 $0.04180
Opus 5.5 $0.00013 $0.01672
Sonnet 5.5 $0.00007 $0.00836
Haiku 4.5 $0.00003 $0.00418

Measured 1mo ago against content hash a80496dabb2f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

animation-motion 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 1mo 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.

plugins/ui-excellence/skills/foundations/animation-motion/SKILL.md · 599 lines

How it starts

The opening of the file, as written. The whole thing — 599 lines — stays where its author put it; the contents beside it link to each section on GitHub.

UI Animation & Motion — Emil Kowalski Design Philosophy

Overview

Taste is trained, not innate. Animation excellence compounds through study and practice—most users never consciously notice individual polish, yet the collection creates stunning results. Beauty is leverage: aesthetic excellence is competitive advantage. This skill applies Emil Kowalski's battle-tested animation decision framework to ship production-grade motion.


When to Use This Skill

Use when:

  • Designing animations for UI components (buttons, modals, dropdowns, popovers, tooltips)
  • Reviewing animation implementations for performance and accessibility
  • Deciding whether/how/how-fast to animate interactions
  • Building gesture-driven interfaces (drag, swipe, hold)
  • Optimizing motion for accessibility (prefers-reduced-motion)
  • Creating staggered or spring-based animations
  • Debugging animation timing, easing, or transform issues

Do NOT use for:

  • Animation frameworks/libraries selection (use dedicated framework skills)
  • Keyframe animation software (Figma, After Effects)
  • SVG animation exclusively (this covers CSS/WAAPI)

The Animation Decision Framework

Question 1: Should This Animate at All?

Frequency is the primary gate:

Frequency Example Decision
100+ times/day Keyboard shortcuts, frequently toggled UI ❌ Never animate
Tens of times/day Hover effects, toggle states ⚠️ Remove or drastically reduce
Occasional (few per session) Modals, toasts, notifications ✅ Standard animation acceptable
Rare Onboarding, celebrations, first-run ✅ Can add delight
Keyboard-initiated Any action from keyboard (return, space, etc.) ❌ Never animate

Golden rule: If users interact with it frequently, every millisecond of animation compounds into frustration.

Question 2: What Is the Purpose?

Valid animation purposes:

  1. Spatial consistency — clarify origin/destination (modal from center, popover from trigger)
  2. State indication — show what changed (button pressed, checkbox checked)
  3. Explanation — guide attention or teach (scroll hint, tooltip entrance)
  4. Feedback — confirm action received (keystroke feedback, form validation)
  5. Preventing jarring changes — smooth transitions between states

Read the full file on GitHub · 599 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. 1mo ago First seen · 599 lines · 33 tokens per session scan A a80496dabb2f

Subscribe to this mod's changes

animation-motion is a skill published in the GitHub repository fernando-bertholdo/4-successful-AI-life (2 stars, last pushed 10d ago), licensed MIT. It adds 33 tokens to every session and 4,180 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-31.

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