performance

80 / 100 · Low risk

Fine to try.

By plugin87/ux-ui-agent-skills (GitHub) · design · 3,158 stars · scanned at commit f823ace

Optimize UI performance against Core Web Vitals (LCP, INP, CLS) with loading/code-split strategy, layout-shift prevention, and animation performance rules. Use when the user wants to improve speed, fix jank or layout shift, hit Web Vitals budgets, or make a UI feel fast on low-end devices.

Works with any agent that supports SKILL.md skills.

What this skill can do

Downloads and installs other software

The author does not mention this. It runs automatically when the plugin is installed.

Found in 4 places.

.claude/skills/performance/SKILL.md, line 11the design-system library. Install it with `npx ux-ui-agent-skills@3.1.0 init`
.claude/skills/performance/SKILL.md, line 12or as the Claude Code plugin. `npx skills@1.7.6 add` copies the skill folder and
hooks/session-start-preflight.mjs, line 43lines.push(' Fix: npm install && npx playwright install chrome');

Show 1 more

hooks/stop-require-measurement.mjs, line 98+ `implying it passed. Installing one: npx playwright install chrome`);

Runs commands on your computer

The author does not mention this. It runs automatically when the plugin is installed.

Found in 8 places.

scripts/accuracy_report.mjs, line 23import { exec } from 'node:child_process';
scripts/gate.mjs, line 27import { spawnSync } from 'node:child_process';
scripts/gate.mjs, line 249const r = spawnSync(runner, [script, ...rest], {

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hooks/hooks.json, line 9"command": "node \"${CLAUDE_PLUGIN_ROOT}/hooks/session-start-preflight.mjs\"",
hooks/hooks.json, line 21"command": "node \"${CLAUDE_PLUGIN_ROOT}/hooks/posttooluse-fast-gates.mjs\"",
hooks/hooks.json, line 32"command": "node \"${CLAUDE_PLUGIN_ROOT}/hooks/stop-require-measurement.mjs\"",
hooks/posttooluse-fast-gates.mjs, line 14import { spawnSync } from 'node:child_process';
hooks/posttooluse-fast-gates.mjs, line 76const r = spawnSync(cmd, args, { encoding: 'utf8', timeout: 20000 });

Install

Paste this into your terminal. It downloads exactly the version we scanned, not whatever is newest.

if [ -e ~/.agents/skills/'performance' ] || [ -L ~/.agents/skills/'performance' ]; then echo 'A skill folder named performance already exists — not replacing it' >&2; false; else d=$(mktemp -d) && git clone --quiet --filter=blob:none --no-checkout 'https://github.com/plugin87/ux-ui-agent-skills' "$d" && git -C "$d" checkout --quiet 'f823acedc3ef4e9b2ba944a28fd86fe2abdde427' -- '.claude/skills/performance' && mkdir -p ~/.agents/skills && cp -R "$d"/'.claude/skills/performance' ~/.agents/skills/'performance' && rm -rf "$d"; fi

Codex reads ~/.agents/skills directly. For Claude Code, Cursor, Copilot, Gemini CLI, Antigravity or OpenCode, also link it. For Claude Code: ln -s ~/.agents/skills/'performance' ~/.claude/skills/'performance' (other agents: ~/.cursor/skills, ~/.copilot/skills, ~/.gemini/skills, ~/.gemini/config/skills, ~/.config/opencode/skills). Or install through the finder skill, which does both.

Badge for your README

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SkillTrust badge for plugin87/ux-ui-agent-skills

[![SkillTrust](https://zalavijaysinh.github.io/skilltrust/badges/plugin87/ux-ui-agent-skills.svg)](https://zalavijaysinh.github.io/skilltrust/repos/plugin87/ux-ui-agent-skills/)

Score history

Date	Version	Score
2026-11-11	`f823ace`	80
2026-11-08	`def84a7`	80
2026-11-07	`def84a7`	80