Agent-Skills.md

Agent Skills: agent-browser

A comprehensive skill for using agent-browser, a CLI tool for browser automation designed for AI agents, developed by Vercel Labs. This skill covers installation, core commands, selectors (refs, CSS, XPath, semantic locators), agent mode, sessions, options, and best practices. Use this skill whenever the user needs to automate browser interactions via CLI commands, especially for AI agents that need to interact with web pages.

UncategorizedID: teachingai/full-stack-skills/agent-browser

Repository

teachingai/full-stack-skills
teachingai

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pnpm dlx add-skill https://github.com/teachingai/full-stack-skills/tree/HEAD/skills/agent-browser

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skills/agent-browser/SKILL.md

Skill Metadata

Name
agent-browser
Description
A comprehensive skill for using agent-browser, a CLI tool for browser automation designed for AI agents, developed by Vercel Labs. This skill covers installation, core commands, selectors (refs, CSS, XPath, semantic locators), agent mode, sessions, options, and best practices. Use this skill whenever the user needs to automate browser interactions via CLI commands, especially for AI agents that need to interact with web pages.

When to use this skill

Use this skill whenever the user wants to:

  • Automate browser interactions via CLI commands
  • Use browser automation for AI agents
  • Navigate websites and interact with pages using command-line tools
  • Use refs-based element selection for deterministic automation
  • Integrate browser automation into AI agent workflows
  • Capture snapshots of web pages with accessibility trees
  • Fill forms, click elements, and extract content via CLI
  • Use semantic locators for more reliable element selection
  • Work with browser automation in agent mode with JSON output
  • Manage multiple browser sessions
  • Debug browser automation with headed mode
  • Use authenticated sessions with custom headers
  • Connect to existing browsers via CDP
  • Stream browser viewport for live preview

How to use this skill

This skill is organized to match the agent-browser official documentation structure (https://github.com/vercel-labs/agent-browser/blob/main/README.md). When working with agent-browser:

  1. Install agent-browser:

    • Load examples/getting-started/installation.md for installation instructions

  2. Quick Start:

    • Load examples/quick-start/quick-start.md for basic workflow examples

  3. Learn core commands:

    • Load examples/commands/basic-commands.md for basic commands (open, click, fill, etc.)
    • Load examples/commands/advanced-commands.md for advanced commands (snapshot, eval, etc.)
    • Load examples/commands/get-info/ for information retrieval commands
    • Load examples/commands/check-state/ for state checking commands
    • Load examples/commands/find-elements/ for semantic locator commands
    • Load examples/commands/wait/ for wait commands
    • Load examples/commands/mouse-control/ for mouse control commands
    • Load examples/commands/browser-settings/ for browser configuration
    • Load examples/commands/cookies-storage/ for cookies and storage management
    • Load examples/commands/network/ for network interception
    • Load examples/commands/tabs-windows/ for tab and window management
    • Load examples/commands/frames/ for iframe handling
    • Load examples/commands/dialogs/ for dialog handling
    • Load examples/commands/debug/ for debugging commands
    • Load examples/commands/navigation/ for navigation commands
    • Load examples/commands/setup/ for setup commands

  4. Understand selectors:

    • Load examples/selectors/refs.md for refs-based selection (@e1, @e2, etc.)
    • Load examples/selectors/traditional-selectors.md for CSS, XPath, and semantic locators

  5. Use agent mode:

    • Load examples/agent-mode/introduction.md for agent mode overview
    • Load examples/agent-mode/optimal-workflow.md for optimal AI workflow
    • Load examples/agent-mode/integration.md for integrating with AI agents

  6. Advanced features:

    • Load examples/advanced/sessions.md for session management
    • Load examples/advanced/headed-mode.md for debugging with visible browser
    • Load examples/advanced/authenticated-sessions.md for authentication via headers
    • Load examples/advanced/custom-executable.md for custom browser executable
    • Load examples/advanced/cdp-mode.md for Chrome DevTools Protocol integration
    • Load examples/advanced/streaming.md for browser viewport streaming
    • Load examples/advanced/architecture.md for architecture overview
    • Load examples/advanced/platforms.md for platform support
    • Load examples/advanced/usage-with-agents.md for AI agent integration patterns

  7. Configure options:

    • Load examples/options/global-options.md for global CLI options
    • Load examples/options/snapshot-options.md for snapshot-specific options
    • Load examples/options/session-options.md for session management options

  8. Reference API documentation when needed:

    • api/commands.md - Complete command reference
    • api/selectors.md - Selector reference
    • api/options.md - Options reference

  9. Use templates for quick start:

    • templates/basic-automation.md - Basic automation workflow
    • templates/ai-agent-workflow.md - AI agent workflow template

Doc mapping (one-to-one with official documentation)

  • See examples and API files → https://github.com/vercel-labs/agent-browser

Examples and Templates

This skill includes detailed examples organized to match the official documentation structure. All examples are in the examples/ directory (see mapping above).

To use examples:

  • Identify the topic from the user's request
  • Load the appropriate example file from the mapping above
  • Follow the instructions, syntax, and best practices in that file
  • Adapt the code examples to your specific use case

To use templates:

  • Reference templates in templates/ directory for common scaffolding
  • Adapt templates to your specific needs and coding style

API Reference

  • Commands API: api/commands.md - Complete command reference with syntax and examples
  • Selectors API: api/selectors.md - Selector types and usage reference
  • Options API: api/options.md - All options reference

Best Practices

  1. Use Refs: Prefer refs (@e1, @e2) over traditional selectors for deterministic automation
  2. Snapshot First: Always snapshot before interacting with elements to get refs
  3. Agent Mode: Use --json flag for machine-readable output in agent mode
  4. Session Management: Use --session to maintain state across commands
  5. Interactive Snapshot: Use -i flag for interactive snapshot selection
  6. Semantic Locators: Use semantic locators (role/name) when refs are not available
  7. Error Handling: Check command exit codes and error messages
  8. Wait for Navigation: Commands automatically wait for navigation to complete
  9. Headed Mode: Use --headed for debugging, headless for production
  10. CDP Integration: Use --cdp for Chrome DevTools Protocol integration
  11. Streaming: Use AGENT_BROWSER_STREAM_PORT for live browser preview
  12. Authenticated Sessions: Use --headers for authentication without login flows
  13. Custom Executable: Use --executable-path for serverless deployments or custom browsers
  14. Snapshot Options: Combine -i, -c, -d, -s options to optimize snapshot output

Resources

  • GitHub Repository: https://github.com/vercel-labs/agent-browser
  • Official README: https://github.com/vercel-labs/agent-browser/blob/main/README.md
  • Agent Mode Documentation: https://agent-browser.dev/agent-mode
  • Issues: https://github.com/vercel-labs/agent-browser/issues

Keywords

agent-browser, CLI browser automation, AI agents, browser automation CLI, refs, snapshot, agent mode, semantic locators, browser automation tool, command-line browser, AI agent browser, deterministic selectors, accessibility tree, browser commands, web automation CLI, sessions, headed mode, authenticated sessions, CDP mode, streaming, Chrome DevTools Protocol, Playwright, browser automation for AI

agent-browser Skill | Agent Skills