docs: add CONTRIBUTING.md and README badges

CONTRIBUTING.md

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+# Contributing to agent-browser
+
+Thank you for your interest in contributing to agent-browser! This guide will help you get started.
+
+## Table of Contents
+
+- [Getting Started](#getting-started)
+- [Development Setup](#development-setup)
+- [Coding Style](#coding-style)
+- [Submitting a Pull Request](#submitting-a-pull-request)
+- [Reporting Issues](#reporting-issues)
+
+## Getting Started
+
+1. **Fork** the repository on GitHub.
+2. **Clone** your fork locally:
+
+   ```bash
+   git clone https://github.com/<your-username>/agent-browser.git
+   cd agent-browser
+   ```
+
+3. **Install dependencies**:
+
+   ```bash
+   pnpm install
+   ```
+
+4. **Download Chromium** (required for browser tests):
+
+   ```bash
+   npx agent-browser install
+   ```
+
+## Development Setup
+
+### Prerequisites
+
+- **Node.js** ≥ 18
+- **pnpm** (recommended package manager)
+- **Rust** toolchain (for native CLI builds — optional for JS-only changes)
+
+### Common Commands
+
+| Command | Description |
+| --- | --- |
+| `pnpm dev` | Start the development server |
+| `pnpm build` | Build the project |
+| `pnpm test` | Run the test suite |
+| `pnpm test:watch` | Run tests in watch mode |
+| `pnpm typecheck` | Run TypeScript type checks |
+| `pnpm format` | Format code with Prettier |
+| `pnpm format:check` | Check code formatting |
+
+### Native CLI (Rust)
+
+To build the native Rust CLI:
+
+```bash
+pnpm build:native
+```
+
+Platform-specific builds:
+
+```bash
+pnpm build:linux
+pnpm build:macos
+pnpm build:windows
+```
+
+## Coding Style
+
+- **TypeScript** for all source code in `src/`.
+- **Prettier** for formatting — run `pnpm format` before committing.
+- **Type safety** — avoid `any`; use proper types. Run `pnpm typecheck` to verify.
+- **Tests** — add tests for new features in `test/`. We use [Vitest](https://vitest.dev/).
+- Keep functions small and focused. Prefer composition over inheritance.
+
+## Submitting a Pull Request
+
+1. Create a feature branch from `main`:
+
+   ```bash
+   git checkout -b feat/your-feature
+   ```
+
+2. Make your changes and commit with clear messages:
+
+   ```bash
+   git commit -m "feat: add XYZ support"
+   ```
+
+   We follow [Conventional Commits](https://www.conventionalcommits.org/).
+
+3. Run checks before pushing:
+
+   ```bash
+   pnpm format
+   pnpm typecheck
+   pnpm test
+   ```
+
+4. Push to your fork and open a Pull Request against `main`.
+
+5. Describe your changes clearly in the PR description. Reference any related issues.
+
+### PR Guidelines
+
+- Keep PRs focused — one feature or fix per PR.
+- Include tests for new functionality.
+- Update documentation if behavior changes.
+- Be responsive to review feedback.
+
+## Reporting Issues
+
+- Use [GitHub Issues](https://github.com/dextonai/agent-browser/issues) to report bugs or request features.
+- Include reproduction steps, expected vs. actual behavior, and your environment (OS, Node version).
+
+## License
+
+By contributing, you agree that your contributions will be licensed under the project's [MIT License](LICENSE).

README.md

@@ -1,5 +1,9 @@
 # agent-browser
 
+[![Build Status](https://github.com/dextonai/agent-browser/actions/workflows/ci.yml/badge.svg)](https://github.com/dextonai/agent-browser/actions/workflows/ci.yml)
+[![npm version](https://img.shields.io/npm/v/agent-browser)](https://www.npmjs.com/package/agent-browser)
+[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](LICENSE)
+
 Headless browser automation CLI for AI agents. Fast Rust CLI with Node.js fallback.
 
 ## Installation