21st-dev-builder-v2

Build websites and web apps using 21st.dev — the largest marketplace of shadcn/ui-based React Tailwind components with 1400+ components.

Skill by Samist-dev

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Install

Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/samist-dev-21st-dev-builder-v2

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Build websites and web apps using 21st.dev — the largest marketplace of shadcn/ui-based React Tailwind components with 1400+ components. Use when user mentions "21st.dev", "21st", "ใช้ 21st", "จาก 21st", "build with 21st", "21st component", "21st magic MCP", or references the 21st.dev component registry in any language. Covers building complete sites (landing pages, dashboards, portfolios, e-commerce storefronts, auth pages), browsing and installing individual 21st.dev components into existing projects, and setting up the 21st.dev MCP server. Also trigger when user wants premium UI components specifically from the 21st.dev registry. Do NOT trigger for general web development, standard shadcn/ui, plain Tailwind CSS, React Native, API development, testing, deployment, or any task that doesn't explicitly reference 21st or 21st.dev.

Use cases: design, frontend, backend, testing

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools: No tools found
Secrets: None asked for
Install scripts: None found

Network hosts it talks to 1

codeload.github.com · found in install command

Files it touches

~/.claude/skills/21st-dev-builder-v2

What's inside

Skill name: 21st-dev-builder-v2
Description: Build websites and web apps using 21st.dev — the largest marketplace of shadcn/ui-based React Tailwind components with 1400+ components. Use when user mentions "21st.dev", "21st", "ใช้ 21st", "จาก 21st", "build with 21st", "21st component", "21st magic MCP", or references the 21st.dev component registry in any language. Covers building complete sites (landing pages, dashboards, portfolios, e-commerce storefronts, auth pages), browsing and installing individual 21st.dev components into existing projects, and setting up the 21st.dev MCP server. Also trigger when user wants premium UI components specifically from the 21st.dev registry. Do NOT trigger for general web development, standard shadcn/ui, plain Tailwind CSS, React Native, API development, testing, deployment, or any task that doesn't explicitly reference 21st or 21st.dev.
License: unknown
Instructions: 548 lines in SKILL.md · view on GitHub

Agent Skills spec issues

body: 548 lines (spec recommends under 500)

Files (5)

README.md
SKILL.md
evals.json · evals/
component-catalog.md · references/
trigger-eval.json

The license isn't open source, so the instructions aren't shown here. Read SKILL.md on GitHub

Signals

Stars: 0
Forks: 0
Open issues: 0
Last commit (this folder): Jul 15, 2026 (3 months ago)

From GitHub (fetched Oct 24, 2026).

Details

License: License unknown
Repository: github.com/Samist-dev/Agent-Toolkit
First seen: Oct 24, 2026
Last checked: Oct 24, 2026
Source: GitHub github-graphql

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21st-dev-builder-v2 skill. Agent Mart. https://agentmart.dev/skills/samist-dev-21st-dev-builder-v2 (last updated 2026-10-24)