Trademarks of their respective owners. KissMySkills is not affiliated with or endorsed by them.
How it works
Ask it something hard.
📎 yuna-frontend-engineer.skillLOADED ✓
React bundle is 2.8MB, LCP on 4G is 6.1s. PM wants features, not a perf sprint. What moves the needle fastest?
CLAUDE · WITH THIS SKILL2.8MB doesn't need a sprint, it needs an afternoon of route-level code splitting - React.lazy on your 5 heaviest routes typically cuts initial JS by 60%. Run bundle analysis first: there is almost always a moment.js with all locales, a full lodash import, and a chart library shipped to every page for one admin screen. LCP usually lands under 3s from splitting plus preloading the hero asset. Sell it to the PM as one afternoon with before/after field data, not a sprint. Paste the analyzer's top 20 modules and I'll mark the cuts.
Questions before you buy? A person answers, usually the same day: hello@kissmyskills.com
// the file itself
Read it before you buy it.
The first lines of the file your AI will read, exactly as delivered. Nothing rewritten for the page.
Use the name Once the file is loaded, talk to it by name: “Serge, check this page.” That is what the name is for. It also keeps several skills apart in one chat.
// the skill your AI runs on
You are Yuna, a Senior Frontend Engineer who reaches for semantic HTML before ARIA, types props from the data shape down, and measures LCP, INP and CLS. You have been activated to ship a UI that works by keyboard.
Drop Yuna into Claude and get a Senior Frontend Engineer who ships React that is fast, typed, accessible, and tested — not a pile of any types and useEffect soup held together by hope. Yuna builds the way a strong product-engineering team builds: component-driven, accessible by default, measured against real Core Web Vitals, and covered by tests that assert behaviour a user can see — never implementation detail. Yuna covers the modern frontend stack end to end: React (function components, hooks, composition, Suspense, error boundaries), TypeScript (discriminated unions, generics, prop typing, narrowing), styling (CSS Modules, Tailwind, CSS-in-JS, modern layout with Grid/Flex/container queries), data-fetching and state (TanStack Query, Context, Zustand, URL state), forms (React Hook Form, Zod), performance (code splitting, memoization, virtualization, image/font strategy, Web Vitals), accessibility (semantic HTML, ARIA, keyboard, focus, WCAG 2.2 AA), and testing (React Testing Library, jest-axe, Playwright for e2e).
SKILL.md · 183 lines · instant download
// what's inside
What's inside this skill
React (hooks, state, composition) and TypeScript
Performance: bundle size, code splitting, Core Web Vitals
Trademarks of their respective owners. KissMySkills is not affiliated with or endorsed by them.
// ask your assistant
Or let your AI set up this skill for you.
Go to kissmyskills.com/pages/connector and set up the "Frontend Engineer AI Skill - Yuna" skill (handle: yuna-frontend-engineer) for me
Paste it into Claude, ChatGPT, Claude Code, Cursor or Codex. Your AI walks you through connecting KissMySkills (about 3 minutes, 7-day free trial) and loads the skill. What your AI will read →
What you're actually buying
Drop Yuna into Claude and get a senior frontend engineer who builds fast, accessible React components with clean TypeScript and real tests.
Yuna builds frontend: React (hooks, state, composition), TypeScript, performance (bundle size, code splitting, memoization, Core Web Vitals), accessibility (semantic HTML, ARIA, keyboard, WCAG), responsive CSS, state management, forms, and testing (React Testing Library). Always develop on a branch, test (unit and a11y), review, and verify in a preview build before merging.
What you get
→React (hooks, state, composition) and TypeScript
→Performance: bundle size, code splitting, Core Web Vitals
→Responsive CSS, state management and React Testing Library
📄 yuna-frontend-engineer.skillUnder 2 min installWorks with Claude, ChatGPT & any AI chat
How to install
Download the .skill package → open Claude → paste SKILL.md into your Project Instructions or system prompt → describe your requirement → Yuna builds the answer. Includes a full worked example so you see exactly what you get.
// how to install
Under 2 minutes
Four steps. Any AI chat.
01
Download the file
After checkout, the download link lands in your inbox. Save the .skill file: Claude takes it as it is.
02
Open your AI chat
Any AI chat you already use: Claude, ChatGPT, Gemini, Grok, Copilot or another.
03
Add it to your AI
Claude: Settings → Capabilities → Skills, upload the .skill file. ChatGPT, Gemini and others: open the .skill file like a .zip archive and paste SKILL.md into custom instructions or Project instructions.
04
Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.
No technical knowledge required.
With Library there is nothing to download. Connect your AI once, then just ask: "Load Frontend Engineer AI Skill from KissMySkills."
Build frontend: React and TypeScript, performance, accessibility, responsive CSS and testing. Load it once into Claude Projects and you get a configured Frontend Engineer without re-explaining context at the start of every session. Always develop on a branch with tests, run it in CI against a staging environment with code review, and promote to production only after tests and approvals; never ship untested changes straight to production.
How do I install this skill file?+
Download the .skill package (it contains SKILL.md), paste the contents into Claude Projects Instructions or your AI's system prompt, add your own context and start your first session. Works with Claude, ChatGPT, or any AI chat that accepts system prompts.
Which AI tools does this skill work with?+
Works with Claude (recommended), ChatGPT, Gemini, Perplexity and Copilot, and any AI chat that accepts system prompts. Claude Projects gives the best results.
How is this different from using Claude without the Yuna skill?+
Without a skill file your AI starts every session as a general assistant. With Yuna loaded it applies Frontend Engineer methodology from the first message, with consistent quality every time. Always develop on a branch with tests, run it in CI against a staging environment with code review, and promote to production only after tests and approvals; never ship untested changes straight to production.
Ready to give your AI a specialist?
This one and 2,500+ others, inside Claude, ChatGPT, Claude Code, Codex or Cursor. Cancel anytime.