@waishnav/react-feedback

v0.1.0

Published

8 months ago

Figma-style UI review for AI coding agents - add comments to elements and export as markdown

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waishnav

react feedback review ui agent ai figma comments

React Grab

Select context for coding agents directly from your website

How? Point at any element and press ⌘C (Mac) or Ctrl+C (Windows/Linux) to copy the file name, React component, and HTML source code.

It makes tools like Cursor, Claude Code, Copilot run up to 3× faster and more accurate.

Try out a demo! →

React Grab Demo

Install

Run this command to install React Grab into your project. Ensure you are running at project root (e.g. where the next.config.ts or vite.config.ts file is located).

npx -y grab@latest init

Usage

Once installed, hover over any UI element in your browser and press:

⌘C (Cmd+C) on Mac
Ctrl+C on Windows/Linux

This copies the element's context (file name, React component, and HTML source code) to your clipboard ready to paste into your coding agent. For example:

<a class="ml-auto inline-block text-sm" href="#">
  Forgot your password?
</a>
in LoginForm at components/login-form.tsx:46:19

Manual Installation

If you're using a React framework or build tool, view instructions below:

Next.js (App router)

Add this inside of your app/layout.tsx:

import Script from "next/script";

export default function RootLayout({ children }) {
  return (
    <html>
      <head>
        {/* put this in the <head> */}
        {process.env.NODE_ENV === "development" && (
          <Script
            src="//unpkg.com/react-grab/dist/index.global.js"
            crossOrigin="anonymous"
            strategy="beforeInteractive"
          />
        )}
      </head>
      <body>{children}</body>
    </html>
  );
}

Next.js (Pages router)

Add this into your pages/_document.tsx:

import { Html, Head, Main, NextScript } from "next/document";

export default function Document() {
  return (
    <Html lang="en">
      <Head>
        {/* put this in the <Head> */}
        {process.env.NODE_ENV === "development" && (
          <Script
            src="//unpkg.com/react-grab/dist/index.global.js"
            crossOrigin="anonymous"
            strategy="beforeInteractive"
          />
        )}
      </Head>
      <body>
        <Main />
        <NextScript />
      </body>
    </Html>
  );
}

Vite

Your index.html could look like this:

<!doctype html>
<html lang="en">
  <head>
    <script type="module">
      // first npm i react-grab
      // then in head:
      if (import.meta.env.DEV) {
        import("react-grab");
      }
    </script>
  </head>
  <body>
    <div id="root"></div>
    <script type="module" src="/src/main.tsx"></script>
  </body>
</html>

Webpack

First, install React Grab:

npm install react-grab

Then add this at the top of your main entry file (e.g., src/index.tsx or src/main.tsx):

if (process.env.NODE_ENV === "development") {
  import("react-grab");
}

MCP Server

React Grab includes an MCP (Model Context Protocol) server that gives AI coding agents direct access to your browser. This enables agents to navigate, click, fill forms, and take screenshots.

Setup

Run during project init:

npx -y grab@latest init
# When prompted, choose to add the MCP server

Or add it separately:

npx -y grab@latest add mcp --client cursor

Supported clients: cursor, claude-code, vscode, opencode, codex, gemini-cli, windsurf, zed, droid

Or add it manually to your mcp.json file:

{
  "mcpServers": {
    "react-grab-browser": {
      "command": "npx",
      "args": ["-y", "grab", "browser", "mcp"]
    }
  }
}

MCP Tools

Once configured, your agent has access to:

browser_snapshot - Get ARIA accessibility tree with element refs (e1, e2...)
browser_execute - Run Playwright code with helpers like ref('e1').click()

Skill

For agents that support skills (like Codex), install the react-grab skill:

npx -y grab@latest add skill
# or
npx -y add-skill aidenybai/react-grab

Extending React Grab

React Grab uses a plugin system to extend functionality. Check out the type definitions to see all available options.

Basic Usage

import { init } from "react-grab/core";

const api = init();

api.activate();
api.copyElement(document.querySelector(".my-element"));
console.log(api.getState());

Lifecycle Hooks Plugin

Track element selections with analytics:

api.registerPlugin({
  name: "analytics",
  hooks: {
    onElementSelect: (element) => {
      analytics.track("element_selected", { tagName: element.tagName });
    },
    onDragEnd: (elements, bounds) => {
      analytics.track("drag_end", { count: elements.length, bounds });
    },
    onCopySuccess: (elements, content) => {
      analytics.track("copy", { count: elements.length });
    },
  },
});

Context Menu Plugin

Add custom actions to the right-click menu:

api.registerPlugin({
  name: "custom-actions",
  actions: [
    {
      id: "log-to-console",
      label: "Log to Console",
      onAction: ({ elements }) => console.dir(elements[0]),
    },
  ],
});

Theme Plugin

Customize the UI appearance:

api.registerPlugin({
  name: "theme",
  theme: {
    hue: 180, // shift colors (pink → cyan)
    crosshair: { enabled: false },
    elementLabel: { enabled: false },
  },
});

Agent Plugin

Create a custom agent that processes selected elements:

api.registerPlugin({
  name: "my-custom-agent",
  actions: [
    {
      id: "custom-agent",
      label: "Ask AI",
      onAction: ({ enterPromptMode }) => enterPromptMode?.(),
      agent: {
        provider: {
          async *send({ prompt, content }, signal) {
            yield "Analyzing element...";

            const response = await fetch("/api/ai", {
              method: "POST",
              headers: { "Content-Type": "application/json" },
              body: JSON.stringify({ prompt, content }),
              signal,
            });

            yield "Processing response...";

            const result = await response.json();
            yield `Done: ${result.message}`;
          },
        },
      },
    },
  ],
});

Resources & Contributing Back

Want to try it out? Check the our demo.

Looking to contribute back? Check the Contributing Guide out.

Want to talk to the community? Hop in our Discord and share your ideas and what you've build with React Grab.

Find a bug? Head over to our issue tracker and we'll do our best to help. We love pull requests, too!

We expect all contributors to abide by the terms of our Code of Conduct.

→ Start contributing on GitHub

License

React Grab is MIT-licensed open-source software.

Thank you to Andrew Luetgers for donating the grab npm package name.