@21st-extension/toolbar
v0.5.14TypeScript
21st.dev toolbar SDK for AI Agent interaction.
0/weekUpdated 7 months agoAGPL-3.0-onlyUnpacked: 3.6 MB
Published by 21st Labs Inc.
npm install @21st-extension/toolbar
21st.dev Toolbar
Visual vibe coding. Right in your codebase.
  
About the project
stagewise is a browser toolbar that connects your frontend UI to your code ai agents in your code editor.
* 🧠 Select any element(s) in your web app
* 💬 Leave a comment on it
* 💡 Let your AI-Agent do the magic
> Perfect for devs tired of pasting folder paths into prompts. stagewise gives your AI real-time, browser-powered context.
✨ Features
The stagewise Toolbar makes it incredibly easy to edit your frontend code with AI agents:
* ⚡ Works out of the box
* 🧩 Customise and extend functionality with Plugins
* 🧠 Sends DOM elements & more metadata to your AI agent
* 🧪 Comes with examples for React, Vue, Svelte and more
* 🔍 Search and integrate UI components from 21st.dev library
* 🚨 Runtime error detection with intelligent assistance
* 🪄 AI-powered component generation with Magic Chat
🔧 Local Development
For local development with your own API server, edit the TWENTY_FIRST_URL constant in toolbar/core/src/constants.ts:
``typescript
// For local development
export const TWENTY_FIRST_URL = 'http://localhost:3000';
// For production (default)
export const TWENTY_FIRST_URL = 'https://21st.dev';
`
📖 Quickstart
$3
Install the extension here: https://marketplace.visualstudio.com/items?itemName=stagewise.stagewise-vscode-extension
$3
> [!TIP]
> 🪄 Auto-Install the toolbar (AI-guided):
> 1. In Cursor, Press CMD + Shift + P
> 2. Enter
> 3. Execute the command and the toolbar will init automatically 🦄
Or follow the manual way:
Install @21st-extension/toolbar:
`bash`
pnpm i -D @21st-extension/toolbar
Inject the toolbar into your app dev-mode:
`ts
// 1. Import the toolbar
import { initToolbar } from '@21st-extension/toolbar';
// 2. Define your toolbar configuration
const stagewiseConfig = {
plugins: [],
};
// 3. Initialize the toolbar when your app starts
// Framework-agnostic approach - call this when your app initializes
function setupStagewise() {
// Only initialize once and only in development mode
if (process.env.NODE_ENV === 'development') {
initToolbar(stagewiseConfig);
}
}
// Call the setup function when appropriate for your framework
setupStagewise();
`
> ⚡️ The toolbar will automatically connect to the extension!
> [!IMPORTANT]
> 🚫 If nothing happens when a prompt is sent:
>
> If you have multiple Cursor windows open, the toolbar may send prompts to the wrong window, making it appear as if "no prompt is being sent". To ensure reliable operation:
> - Keep only one Cursor window open when using stagewise
>
> A fix for this is on the way!
$3
For easier integration, we provide framework-specific NPM packages that come with dedicated toolbar components (e.g., ). You can usually import these from @21st-extension/toolbar-[framework-name].
React.js
We provide the @21st-extension/toolbar-react package for React projects. Initialize the toolbar in your main entry file (e.g., src/main.tsx) by creating a separate React root for it. This ensures it doesn't interfere with your main application tree.
`tsx
// src/main.tsx
import { StrictMode } from 'react';
import { createRoot } from 'react-dom/client';
import App from './App.tsx';
import { TwentyFirstToolbar } from '@21st-extension/toolbar-react';
import './index.css';
// Render the main app
createRoot(document.getElementById('root')!).render(
);
// Initialize toolbar separately
const toolbarConfig = {
plugins: [], // Add your custom plugins here
};
document.addEventListener('DOMContentLoaded', () => {
const toolbarRoot = document.createElement('div');
toolbarRoot.id = 'stagewise-toolbar-root'; // Ensure a unique ID
document.body.appendChild(toolbarRoot);
createRoot(toolbarRoot).render(
);
});
`
Next.js
Use the @21st-extension/toolbar-next package for Next.js applications. Include the component in your root layout file (src/app/layout.tsx).
`tsx
// src/app/layout.tsx
import { TwentyFirstToolbar } from '@21st-extension/toolbar-next';
export default function RootLayout({
children,
}: Readonly<{
children: React.ReactNode;
}>) {
return (
plugins: [], // Add your custom plugins here
}}
/>
{children}
);
}
`
Nuxt.js
For Nuxt.js projects, you can use the
package. Place the component in your app.vue or a relevant layout file.`vue
// app.vue
`
Vue.js
Use the
package for Vue.js projects. Add the component to your main App component (e.g., App.vue).`vue
// src/App.vue
`
SvelteKit
For SvelteKit, you can integrate the toolbar using
and Svelte's lifecycle functions, or look for a dedicated @21st-extension/toolbar-svelte package if available. Create a component that conditionally renders/initializes the toolbar on the client side (e.g., src/lib/components/TwentyFirstToolbarLoader.svelte or directly in src/routes/+layout.svelte).Using
onMount in +layout.svelte (with @21st-extension/toolbar):
`svelte
`Using a loader component (example from repository):
The example repository uses a
which wraps ToolbarWrapper.svelte. ToolbarWrapper.svelte would then call initToolbar from @21st-extension/toolbar.`svelte
{#if browser}
{/if}
`
You would then use in your src/routes/+layout.svelte`.🤖 Agent support
| Agent | Supported |
| -------------- | -------------- |
| Cursor | ✅ |
| GitHub Copilot | ✅ |
| Windsurf | ✅ |
| Cline | ✅ |
| Roo Code | ✅ |
| Trae IDE | ✅ |
| Kilo Code | ✅ |
| Claude Code | ✅ (via Copy Prompt) |
| Gemini CLI | ✅ (via Copy Prompt) |
| Any AI Agent | ✅ (via Copy Prompt) |
🛣️ Roadmap
Check out our project roadmap for upcoming features, bug fixes, and progress.
📜 License
stagewise is developed by tiq UG (haftungsbeschränkt) and offerend under the AGPLv3 license.
For more information on the license model, visit the FAQ about the GNU Licenses.
For use cases that fall outside the scope permitted by the AGPLv3 license, feel free to 📬 Contact Us.
🤝 Contributing
We're just getting started and love contributions! Check out our CONTRIBUTING.md guide to get involved. For bugs and fresh ideas, please Open an issue!
💬 Community & Support
* 👾 Join our Discord
* 📖 Open an issue on GitHub for dev support.
📬 Contact Us
Got questions or want to license stagewise for commercial or enterprise use?