What is ui-animation?

Guidance for designing and reviewing movement in user interfaces, including CSS transitions, keyframes, and spring animations. It covers timing, easing, keyboard interactions, and reduced-motion settings for people who prefer less animation.

Use it when planning or implementing hover effects, dialogs, menus, state changes, SVG movement, and other interface animations.

It helps keep motion understandable, responsive, accessible, and less distracting while avoiding animation choices that can make interfaces jumpy or hard to use.

ui-animation — Skill for Claude Code and Codex by jarvis-llm-codec

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 jarvis-llm-codec/jarvis-code --skill ui-animation

Clone the repo

git clone --depth 1 https://github.com/jarvis-llm-codec/jarvis-code

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/jarvis-llm-codec/jarvis-code/ui-animation/github.svg)](https://agentmods.dev/skills/jarvis-llm-codec/jarvis-code/ui-animation)

Your own site

<a href="https://agentmods.dev/skills/jarvis-llm-codec/jarvis-code/ui-animation"><img src="https://agentmods.dev/badge/skills/jarvis-llm-codec/jarvis-code/ui-animation/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/jarvis-llm-codec/jarvis-code/ui-animation"><img src="https://agentmods.dev/badge/skills/jarvis-llm-codec/jarvis-code/ui-animation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 553 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.

Model	Per session	Once invoked
Fable 5.1	$0.00045	$0.00553
Opus 5.5	$0.00018	$0.00221
Sonnet 5.5	$0.00009	$0.00111
Haiku 4.5	$0.00005	$0.00055

Measured 2mo ago against content hash ecd1615aae1a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

ui-animation 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 2mo 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.

jarvis-resources/skills/ui-animation/SKILL.md · 52 lines

How it starts

The opening of the file, as written. The whole thing — 52 lines — stays where its author put it; the contents beside it link to each section on GitHub.

UI Animation

Core rules

Animate to clarify cause/effect or add deliberate delight.
Keep interactions fast (200-300ms; up to 1s only for illustrative motion).
Never animate keyboard interactions (arrow-key navigation, shortcut responses, tab/focus).
Prefer CSS; use WAAPI or JS only when needed.
Make animations interruptible and input-driven.
Honor prefers-reduced-motion (reduce or disable).

What to animate

For movement and spatial change, animate only transform and opacity.
For simple state feedback, color, background-color, and opacity transitions are acceptable.
Never animate layout properties; never use transition: all.
Avoid filter animation for core interactions; if unavoidable, keep blur <= 20px.
SVG: apply transforms on a <g> wrapper with transform-box: fill-box; transform-origin: center.
Disable transitions during theme switches.

Spatial and sequencing

Set transform-origin at the trigger point.
For dialogs/menus, start around scale(0.85-0.9); avoid scale(0).
Stagger reveals <= 50ms.

Easing defaults

Enter and transform-based hover: cubic-bezier(0.22, 1, 0.36, 1).
Move: cubic-bezier(0.25, 1, 0.5, 1).
Simple hover colour/background/opacity: 200ms ease.
Avoid ease-in for UI (feels slow).

Accessibility

If transform is used, disable it in prefers-reduced-motion.
Disable hover transitions on touch devices via @media (hover: hover) and (pointer: fine).

Performance

Pause looping animations off-screen.
Toggle will-change only during heavy motion and only for transform/opacity.
Prefer transform over positional props in animation libraries.
Do not animate drag gestures using CSS variables.

Reference

Snippets and practical tips: examples.md

Workflow

Start with the core rules, then pick a reference snippet from examples.md.
Keep motion functional; honor prefers-reduced-motion.
When reviewing, cite file paths and line numbers and propose concrete fixes.

Read the full file on GitHub · 52 lines

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

examples.md 5.1 KB

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.

2mo ago First seen · 52 lines · 45 tokens per session scan A ecd1615aae1a

Subscribe to this mod's changes

ui-animation is a skill published in the GitHub repository jarvis-llm-codec/jarvis-code (22 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 45 tokens to every session and 553 once invoked, about $0.0002 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 2026-08-30.

CSS and styling Design and UX Frontend

ui-animation next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
ui-animationjarvis-llm-codec/jarvis-code	Skill	22	3mo ago	Apache-2.0	A	45	Claude Code, Codex
anti-slop-designsickn33/agentic-awesome-skills	Skill	49k	yesterday	MIT	A	34	Claude Code
chakra-ui-builderchakra-ui/chakra-ui	Skill	41k	yesterday	MIT	A	214	Claude Code, Codex
visual-ralphYeachan-Heo/oh-my-codex	Skill	34k	4d ago	MIT	A	52	Codex
open-design-setupcompozy/compozy	Skill	2.8k	yesterday	MIT	A	67	Claude Code, Codex
frontend-visual-qadaymade/claude-code-skills	Skill	1.5k	yesterday	MIT	A	125	Claude Code, Codex
prototype-webnexu-io/html-anything	Skill	9.4k	25d ago	Apache-2.0	A	24	Claude Code, Codex