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Frontend Engineer

A frontend discipline skill that forbids saying "done" until the build passes and the result is screenshot-verified in a real browser.

Dev & CodingIntermediate★ 30,471⑂ 12,865AI score 8/10Last updated: Aug 9, 2026

What it does

Puts Claude into senior-frontend-engineer mode with a mandatory workflow:

  • Understand first: read package.json, inspect existing components and design tokens, and extend an existing component instead of creating a near-duplicate.
  • Code quality rules: TypeScript with explicit return types, Server Components by default in the Next.js App Router, minimal use client, no barrel imports, semantic HTML, mobile-first responsive CSS, WCAG AA 4.5:1 contrast.
  • Clean build enforced: broken builds must be fixed, never patched by disabling ESLint or TypeScript checks.
  • Mandatory visual verification: start the dev server, drive agent-browser to capture 1280px and 768px screenshots, and check for console errors, overflow and broken images.
  • Post-deploy verification: reopen the live URL, screenshot it, and report stack, URL, screenshots and known limitations.

Who it's for

  • Developers shipping real products with Next.js, React or Vite
  • Anyone tired of agents claiming success on visually broken pages
  • Teams that want consistent spacing plus loading/error/empty state patterns
  • Engineers who want accessibility and bundle-size hygiene by default

Examples

  1. New landing page: ask for a Next.js product page → clean build → desktop and tablet screenshots → Vercel deploy and live-URL recheck.
  2. Dashboard refactor: extract duplicated card markup into a shared component, normalise mixed spacing values to the design scale, and compare before/after screenshots.
  3. Responsive bug fix: trace a mobile horizontal scrollbar through screenshots and console output, fix, rebuild and re-capture, iterating at most three times before flagging it as a known limitation.

· · · Install guide · · ·

Install in the Claude app (no terminal)
  1. Download the ZIP with the button below.
  2. In Claude, open Settings → Capabilities and turn on 'Code execution and file creation'. (one time)
  3. Go to Customize → Skills → + → 'Upload a skill' and upload the ZIP.
↓ Download ZIP
Install in Claude Code

Let Claude do it — paste this into Claude Code

Install the skill I found on Claude Skill Mart.
Copy the container/skills/frontend-engineer folder from the GitHub repo nanocoai/nanoclaw into my ~/.claude/skills/frontend-engineer/.
When it's done, tell me in one line what this skill can do.

Install with a command instead

git clone https://github.com/nanocoai/nanoclaw.git && mkdir -p ~/.claude/skills && cp -r nanoclaw/container/skills/frontend-engineer ~/.claude/skills/

⚠ This is a third-party skill. Check the source repository before installing.

  1. Open a terminal.
  2. Create the skills folder if needed: mkdir -p ~/.claude/skills
  3. Clone the repository: git clone https://github.com/nanocoai/nanoclaw.git
  4. Copy just this skill: cp -r nanoclaw/container/skills/frontend-engineer ~/.claude/skills/
  5. Verify: ls ~/.claude/skills/frontend-engineer/SKILL.md
  6. Optional tooling: install pnpm and the agent-browser CLI for the screenshot steps, and the vercel CLI if you want the deploy step.
  7. Restart Claude Code and prompt something like "Use the frontend-engineer skill to build this page."
View source on GitHub ↗License: MIT