GSAP Performance Tuning
greensock/gsap-skills
Guides the agent to keep GSAP animations smooth by animating transforms and opacity, batching DOM reads and writes, and avoiding layout-heavy properties.
Audits and fixes web animation performance: layout thrashing, work that belongs on the compositor, scroll-linked motion and costly blur effects.
Install Fixing Motion Performance
$ npx skills add ibelick/ui-skills --skill fixing-motion-performance -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install ibelick/ui-skills fixing-motion-performance --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/ibelick/ui-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/fixing-motion-performance .claude/skills/fixing-motion-performance && rm -rf skills-srcUse ~/.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/
Install the "fixing-motion-performance" agent skill from https://github.com/ibelick/ui-skills/tree/main/skills/fixing-motion-performance into .claude/skills/fixing-motion-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fixing-motion-performance", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/ibelick/ui-skills/tree/main/skills/fixing-motion-performanceType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add ibelick/ui-skills --skill fixing-motion-performance -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install ibelick/ui-skills fixing-motion-performance --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ibelick/ui-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/fixing-motion-performance .agents/skills/fixing-motion-performance && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "fixing-motion-performance" agent skill from https://github.com/ibelick/ui-skills/tree/main/skills/fixing-motion-performance into .agents/skills/fixing-motion-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fixing-motion-performance", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ibelick/ui-skills --skill fixing-motion-performance -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install ibelick/ui-skills fixing-motion-performance --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ibelick/ui-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/fixing-motion-performance .cursor/skills/fixing-motion-performance && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "fixing-motion-performance" agent skill from https://github.com/ibelick/ui-skills/tree/main/skills/fixing-motion-performance into .cursor/skills/fixing-motion-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fixing-motion-performance", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/ibelick/ui-skills.git --path skills/fixing-motion-performance--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add ibelick/ui-skills --skill fixing-motion-performance -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install ibelick/ui-skills fixing-motion-performance --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ibelick/ui-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/fixing-motion-performance .gemini/skills/fixing-motion-performance && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "fixing-motion-performance" agent skill from https://github.com/ibelick/ui-skills/tree/main/skills/fixing-motion-performance into .gemini/skills/fixing-motion-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fixing-motion-performance", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install ibelick/ui-skills fixing-motion-performanceInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add ibelick/ui-skills --skill fixing-motion-performance -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/ibelick/ui-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/fixing-motion-performance .github/skills/fixing-motion-performance && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "fixing-motion-performance" agent skill from https://github.com/ibelick/ui-skills/tree/main/skills/fixing-motion-performance into .github/skills/fixing-motion-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fixing-motion-performance", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add ibelick/ui-skills --skill fixing-motion-performance -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install ibelick/ui-skills fixing-motion-performance --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/ibelick/ui-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/fixing-motion-performance .opencode/skills/fixing-motion-performance && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "fixing-motion-performance" agent skill from https://github.com/ibelick/ui-skills/tree/main/skills/fixing-motion-performance into .opencode/skills/fixing-motion-performance/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "fixing-motion-performance", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
fixing-motion-performance- GitHub stars
- 9.5k
- Used in
- 5 other repos
- Token cost
- ~1.4k tokens
- SKILL.md length
- 571 words
- Files
- 1
- Skills in repo
- 7
- Repo updated
- First seen
- Licence
- MIT
At a glance
Audits and fixes web animation performance: layout thrashing, work that belongs on the compositor, scroll-linked motion and costly blur effects.
- Works in 9 steps: never patterns (critical) → choose the mechanism (critical) → measurement (high) → …
- Fixing animations that stutter or transitions that jank
- SKILL.md covers how to use, when to apply, rendering steps glossary and rule categories by priority, plus 3 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
The skill audits and fixes animation performance problems in web UIs: layout thrashing, work that should run on the compositor, scroll-linked motion and expensive blur effects. Invoked alone it applies its rules to any animation work in the conversation; pointed at a file it reports each violation with the exact line, a one-sentence reason it matters and a concrete code-level fix. It works inside the existing stack and does not migrate animation libraries unless asked.
Rules are ranked by priority, starting with never patterns (no interleaved layout reads and writes in one frame, no continuous animation of layout on large surfaces, no driving animation from scroll events, no requestAnimationFrame loop without a stop condition) and choosing the mechanism (default to transform and opacity, JS-driven motion only when interaction needs it). Further categories cover measurement, scroll, paint, layers, blur and filters, view transitions and tool boundaries. A glossary sorts properties into composite, paint and layout costs; the excerpt ends within the scroll rules.
When your agent uses it
- Fixing animations that stutter or transitions that jank
- Reviewing CSS or JavaScript animation code for layout thrashing
- Implementing scroll-linked or reveal-on-scroll motion without scroll event handlers
- Checking will-change, transform and measurement use in components
Example prompts
- “Review src/components/Hero.tsx for animation performance problems.”
- “The card hover transition janks on mobile. Find the cause and fix it.”
- “Rewrite this reveal-on-scroll effect so it doesn't rely on scroll events.”
Workflow steps
9 steps, taken from the step headings in SKILL.md.
What it can do on your machine
Read from SKILL.md and the folder at commit 587ea30. 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 (its code samples are css and javascript).
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
Fixing Motion Performance loads about 1.4k tokens when it runs. Until then it costs about 62 tokens; SKILL.md has 571 words of instructions outside code blocks.
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 ibelick/ui-skills at commit 587ea30, republished under its MIT licence (© ibelick). 571 words, ~1,391 tokens.
Download SKILL.mdSave it as
.claude/skills/fixing-motion-performance/SKILL.md (or your agent's skills folder).- name
- fixing-motion-performance
- description
- Audit and fix animation performance issues including layout thrashing, compositor properties, scroll-linked motion, and blur effects. Use when animations stutter, transitions jank, or reviewing CSS/JS animation performance.
fixing-motion-performance
Fix animation performance issues.
how to use
/fixing-motion-performanceApply these constraints to any UI animation work in this conversation./fixing-motion-performance <file>Review the file against all rules below and report:- violations (quote the exact line or snippet)
- why it matters (one short sentence)
- a concrete fix (code-level suggestion)
Do not migrate animation libraries unless explicitly requested. Apply rules within the existing stack.
when to apply
Reference these guidelines when:
- adding or changing UI animations (CSS, WAAPI, Motion, rAF, GSAP)
- refactoring janky interactions or transitions
- implementing scroll-linked motion or reveal-on-scroll
- animating layout, filters, masks, gradients, or CSS variables
- reviewing components that use will-change, transforms, or measurement
rendering steps glossary
- composite: transform, opacity
- paint: color, borders, gradients, masks, images, filters
- layout: size, position, flow, grid, flex
rule categories by priority
| priority | category | impact |
|---|---|---|
| 1 | never patterns | critical |
| 2 | choose the mechanism | critical |
| 3 | measurement | high |
| 4 | scroll | high |
| 5 | paint | medium-high |
| 6 | layers | medium |
| 7 | blur and filters | medium |
| 8 | view transitions | low |
| 9 | tool boundaries | critical |
quick reference
1. never patterns (critical)
- do not interleave layout reads and writes in the same frame
- do not animate layout continuously on large or meaningful surfaces
- do not drive animation from scrollTop, scrollY, or scroll events
- no requestAnimationFrame loops without a stop condition
- do not mix multiple animation systems that each measure or mutate layout
2. choose the mechanism (critical)
- default to transform and opacity for motion
- use JS-driven animation only when interaction requires it
- paint or layout animation is acceptable only on small, isolated surfaces
- one-shot effects are acceptable more often than continuous motion
- prefer downgrading technique over removing motion entirely
3. measurement (high)
- measure once, then animate via transform or opacity
- batch all DOM reads before writes
- do not read layout repeatedly during an animation
- prefer FLIP-style transitions for layout-like effects
- prefer approaches that batch measurement and writes
4. scroll (high)
- prefer Scroll or View Timelines for scroll-linked motion when available
- use IntersectionObserver for visibility and pausing
- do not poll scroll position for animation
- pause or stop animations when off-screen
- scroll-linked motion must not trigger continuous layout or paint on large surfaces
Show full SKILL.md (220 more words)Show less
5. paint (medium-high)
- paint-triggering animation is allowed only on small, isolated elements
- do not animate paint-heavy properties on large containers
- do not animate CSS variables for transform, opacity, or position
- do not animate inherited CSS variables
- scope animated CSS variables locally and avoid inheritance
6. layers (medium)
- compositor motion requires layer promotion, never assume it
- use will-change temporarily and surgically
- avoid many or large promoted layers
- validate layer behavior with tooling when performance matters
7. blur and filters (medium)
- keep blur animation small (<=8px)
- use blur only for short, one-time effects
- never animate blur continuously
- never animate blur on large surfaces
- prefer opacity and translate before blur
8. view transitions (low)
- use view transitions only for navigation-level changes
- avoid view transitions for interaction-heavy UI
- avoid view transitions when interruption or cancellation is required
- treat size changes as potentially layout-triggering
9. tool boundaries (critical)
- do not migrate or rewrite animation libraries unless explicitly requested
- apply these rules within the existing animation system
- never partially migrate APIs or mix styles within the same component
common fixes
/* layout thrashing: animate transform instead of width */
/* before */ .panel { transition: width 0.3s; }
/* after */ .panel { transition: transform 0.3s; }
/* scroll-linked: use scroll-timeline instead of JS */
/* before */ window.addEventListener('scroll', () => el.style.opacity = scrollY / 500)
/* after */ .reveal { animation: fade-in linear; animation-timeline: view(); }// measurement: batch reads before writes (FLIP)
// before — layout thrash
el.style.left = el.getBoundingClientRect().left + 10 + 'px';
// after — measure once, animate via transform
const first = el.getBoundingClientRect();
el.classList.add('moved');
const last = el.getBoundingClientRect();
el.style.transform = `translateX(${first.left - last.left}px)`;
requestAnimationFrame(() => { el.style.transition = 'transform 0.3s'; el.style.transform = ''; });review guidance
- enforce critical rules first (never patterns, tool boundaries)
- choose the least expensive rendering work that matches the intent
- for any non-default choice, state the constraint that justifies it (surface size, duration, or interaction requirement)
- when reviewing, prefer actionable notes and concrete alternatives over theory
© ibelick, 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 skills/fixing-motion-performance of ibelick/ui-skills.
Open the folder on GitHubat commit 587ea30
Used in 5 other repositories
We found 14 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 5 other GitHub owners. This page covers the copy in ibelick/ui-skills, which our catalogue first saw on October 7, 2026.
- gustavscirulis/snapgrid.agents/skills/fixing-motion-performance
- aiskillstore/marketplaceskills/ibelick/fixing-motion-performance
- sickn33/agentic-awesome-skillsskills/fixing-motion-performanceplugins/agentic-awesome-skills/skills/fixing-motion-performance+1 more
- lingxling/awesome-skills-cnantigravity-awesome-skills/skills/fixing-motion-performanceantigravity-awesome-skills/plugins/agentic-awesome-skills/skills/fixing-motion-performance+1 more
- henryalouf/ruflow.agents/skills/fixing-motion-performance.agents/skills/antigravity-awesome-skills/skills/fixing-motion-performance+4 more
Compare with similar skills
Fixing Motion Performance 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.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Fixing Motion Performance this skillibelick/ui-skills | 9.5k | 5 repos | ~1.4k | Automated safety check: Pass | MIT | |
| GSAP Performance Tuninggreensock/gsap-skills | 16k | 4 repos | ~1k | Automated safety check: Pass | MIT | |
| Phantom Motionpixelxzen/phantom-motion | 185 | — | ~1k | Automated safety check: Pass | Apache-2.0 | |
| GSAP ScrollTriggergreensock/gsap-skills | 16k | 5 repos | ~4.6k | Automated safety check: Pass | MIT | |
| GSAP Core Animationgreensock/gsap-skills | 16k | 4 repos | ~3.7k | Automated safety check: Pass | MIT | |
| Web Animation DesignbaptisteArno/typebot.io | 11k | 2 repos | ~2.7k | Automated safety check: Pass | Custom licence |
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Related
Works with
Categories
Questions about Fixing Motion Performance
What does Fixing Motion Performance do?
Audits and fixes web animation performance: layout thrashing, work that belongs on the compositor, scroll-linked motion and costly blur effects. The skill audits and fixes animation performance problems in web UIs: layout thrashing, work that should run on the compositor, scroll-linked motion and expensive blur effects. Invoked alone it applies its rules to any animation work in the conversation; pointed at a file it reports each violation with the exact line, a one-sentence reason it matters and a concrete code-level fix.
When should I use Fixing Motion Performance?
Fixing Motion Performance fits situations like: fixing animations that stutter or transitions that jank; reviewing CSS or JavaScript animation code for layout thrashing; implementing scroll-linked or reveal-on-scroll motion without scroll event handlers; checking will-change, transform and measurement use in components.
How do I install Fixing Motion Performance in Claude Code?
Run `npx skills add ibelick/ui-skills --skill fixing-motion-performance -a claude-code`. Or copy the skill folder (skills/fixing-motion-performance in ibelick/ui-skills) into .claude/skills/fixing-motion-performance in your project. Claude Code loads it when a task matches its description.
How do I install Fixing Motion Performance in Codex?
Run `npx skills add ibelick/ui-skills --skill fixing-motion-performance -a codex`. Or copy the skill folder (skills/fixing-motion-performance in ibelick/ui-skills) into .agents/skills/fixing-motion-performance in your project. Codex loads it when a task matches its description.
Can I use Fixing Motion Performance 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 ibelick/ui-skills --skill fixing-motion-performance -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/fixing-motion-performance, .gemini/skills/fixing-motion-performance, .github/skills/fixing-motion-performance and .opencode/skills/fixing-motion-performance in your project.
What does Fixing Motion Performance need to run?
SKILL.md names no scripts, command-line tools or credentials: Fixing Motion Performance is instructions for the agent only.
Does Fixing Motion Performance 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 Fixing Motion Performance 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 Fixing Motion Performance use?
Fixing Motion Performance 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 Fixing Motion Performance use?
About 1.4k tokens (SKILL.md is roughly 5.6k 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 Fixing Motion Performance?
Skills that share tags, products or a category with Fixing Motion Performance: GSAP Performance Tuning (greensock/gsap-skills, 16k stars), Phantom Motion (pixelxzen/phantom-motion, 185 stars), GSAP ScrollTrigger (greensock/gsap-skills, 16k stars) and GSAP Core Animation (greensock/gsap-skills, 16k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Fixing Motion Performance?
ibelick (a GitHub user) maintains it in ibelick/ui-skills, which has 9,476 GitHub stars. The repository holds 7 skills in this directory. The repository was last updated on October 7, 2026.
Source: ibelick/ui-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.