Is the Build Your Own Component Library skill free?

Yes. The skill itself is free from ethankongee/build-your-own-component. SkillProof publishes the install command and an independent test verdict at no cost.

What is the Build Your Own Component Library SkillProof Score?

9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 4/5.

How do I install Build Your Own Component Library?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use Build Your Own Component Library with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

Build Your Own Component Library

Generates a 24-component, token-driven React or Vanilla-JS UI library plus a live side-by-side comparison page.

by ethankongee · ethankongee/build-your-own-component

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.2/10
Tested: Jul 16, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · 485aa69

Built a representative Vanilla-JS subset (Box, Text, Icon, Button, Card, Overlay, Modal) live in a browser: themed variants, loading/disabled states, and a working Modal open/close all rendered correctly off one theme.js token file - clearly more systematic than an ad-hoc baseline. Caught a real bug in the skill's own reference docs: component-specs.md documents Box props (display, flexDirection, alignItems, justifyContent, gap) that the literal Box() boilerplate in vanilla-templates.md never applies to el.style, so following that template verbatim silently breaks flex layouts until you notice and patch it.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 4/5

What Build Your Own Component Library does

Walks through building a complete UI component library from a Box/Text composition base and a design-token theme, in dependency-ordered tiers (Spacing/Box/Text/Icon up through Accordion/Modal/Select), for React or Vanilla JS, with 1-3 differently-themed variations rendered on one comparison.html page. Triggers when the user wants a component library, design system, or UI kit built from scratch.

How to install Build Your Own Component Library

git clone https://github.com/ethankongee/build-your-own-component
mkdir -p ~/.claude/skills
cp -r build-your-own-component ~/.claude/skills/build-your-own-component

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger Build Your Own Component Library

/build-your-own-component Generates a 24-component, token-driven React or Vanilla-JS UI library plus a live side-by-side comparison page.

It also activates on plain-language prompts like these:

Build me a token-driven component library starting from Box and Text
Generate a Vanilla-JS Modal and Accordion sharing one theme file
Create a comparison page showing three themed variants of my buttons

Frequently asked questions

Is the Build Your Own Component Library skill free?: Yes. The skill itself is free from ethankongee/build-your-own-component. SkillProof publishes the install command and an independent test verdict at no cost.
Does Build Your Own Component Library work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 16, 2026. Verdict: Tested · Works. Built a representative Vanilla-JS subset (Box, Text, Icon, Button, Card, Overlay, Modal) live in a browser: themed variants, loading/disabled states, and a working Modal open/close all rendered correctly off one theme.js token file - clearly more systematic than an ad-hoc baseline. Caught a real bug in the skill's own reference docs: component-specs.md documents Box props (display, flexDirection, alignItems, justifyContent, gap) that the literal Box() boilerplate in vanilla-templates.md never applies to el.style, so following that template verbatim silently breaks flex layouts until you notice and patch it.
What is the Build Your Own Component Library SkillProof Score?: 9.2/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 4/5.
How do I install Build Your Own Component Library?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use Build Your Own Component Library with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.