How do I install the Agent Browser skill?

Run npx skillmds@latest add s3yed/agent-browser-2 in your terminal (requires Node.js), paste this page's agent-chat prompt into Claude, Cursor, or any MCP-connected agent, or download the SKILL.md file and copy it into your agent's skills directory.

Is Agent Browser safe to use?

This skill has not completed SkillMD's automated safety review yet. SkillMD never runs a skill's scripts for you; review the SKILL.md before installing.

Which AI agents work with Agent Browser?

This skill is tagged as working with Claude Code, Claude.ai, OpenAI Codex. SKILL.md is an open format, so most agents that read a skills directory can load it too.

Is Agent Browser free to use?

Yes. Installing skills from SkillMD is free, and the skill stays under its author's original license.

Who published Agent Browser?

S3YED (@s3yed) published this skill. Their other Agent Skills are listed on their SkillMD profile.

Agent Browser by s3yed — Agent Skill

Name: Agent Browser
Author: S3YED

Agent Browser

Browser automation CLI built for AI agents - compact ref-based text output (200-400 tokens vs 3000-5000 for full DOM), native Rust, 50+ commands. Default browser-automation tool for the fleet. Use for any web navigation, scraping, form-filling, screenshots, or testing from the shell.

S3YED 240cb00 2.3 KB Updated Sep 17, 2026

File contents

agent-browser - fleet default for browser automation

A native-Rust browser-automation CLI designed for AI agents. Compact text output minimises context usage. Use it instead of heavier browser stacks for shell-driven web tasks.

Install

npm install -g agent-browser      # all platforms
# or: brew install agent-browser  # macOS
agent-browser install             # download Chrome (first run only)
# try without installing:
npx agent-browser open example.com

Core loop (ref-based)

agent-browser open example.com
agent-browser snapshot -i          # accessibility tree with refs: heading "..." [ref=e1], link "..." [ref=e2]
agent-browser click @e2            # act on a ref from the snapshot
agent-browser screenshot page.png
agent-browser close

Why refs (the context win)

snapshot returns a compact accessibility tree where each element has a ref (@e1, @e2):

Context-efficient: ~200-400 tokens vs ~3000-5000 for full DOM.
Deterministic: a ref points to the exact element from the snapshot (no fragile selectors).
Fast: no DOM re-query. AI-friendly: text output parses naturally.

What it covers (50+ commands)

Navigation, forms, screenshots, network control, storage/cookies/auth-state, file upload/download, tabs, frames, debugging. Built-in: video recording, streaming, profiler, diffing. First-class docs for React/Web Vitals, init scripts, and Next.js + Vercel. Stateful: sessions, profiles, proxy, security controls - good for long-running agents.

Architecture

Client-daemon: a Rust CLI talks to a native Rust daemon that drives Chrome over CDP. The daemon starts automatically and persists between commands.

When to use vs other tools

Default for shell-driven browser work (cheapest context, deterministic).
Use Playwright/Stagehand only when you need their specific ecosystem features.
Cross-platform: macOS (arm64/x64), Linux (arm64/x64), Windows (x64).

Works with: Claude Code, Cursor, Copilot, Codex, Gemini, opencode, and any agent that runs shell commands.

---name: agent-browser-2description: Browser automation CLI built for AI agents - compact ref-based text output (200-400 tokens vs 3000-5000 for full DOM), native Rust, 50+ commands. Default browser-automation tool for the fleet. Use for any web navigation, scraping, form-filling, screenshots, or testing from the shell.---# agent-browser - fleet default for browser automationA native-Rust browser-automation CLI designed for AI agents. Compact text output minimises context usage. Use it instead of heavier browser stacks for shell-driven web tasks.## Install```bashnpm install -g agent-browser # all platforms# or: brew install agent-browser # macOSagent-browser install # download Chrome (first run only)# try without installing:npx agent-browser open example.com```## Core loop (ref-based)```bashagent-browser open example.comagent-browser snapshot -i # accessibility tree with refs: heading "..." [ref=e1], link "..." [ref=e2]agent-browser click @e2 # act on a ref from the snapshotagent-browser screenshot page.pngagent-browser close```## Why refs (the context win)`snapshot` returns a compact accessibility tree where each element has a ref (`@e1`, `@e2`):- Context-efficient: ~200-400 tokens vs ~3000-5000 for full DOM.- Deterministic: a ref points to the exact element from the snapshot (no fragile selectors).- Fast: no DOM re-query. AI-friendly: text output parses naturally.## What it covers (50+ commands)Navigation, forms, screenshots, network control, storage/cookies/auth-state, file upload/download, tabs, frames, debugging. Built-in: video recording, streaming, profiler, diffing. First-class docs for React/Web Vitals, init scripts, and Next.js + Vercel. Stateful: sessions, profiles, proxy, security controls - good for long-running agents.## ArchitectureClient-daemon: a Rust CLI talks to a native Rust daemon that drives Chrome over CDP. The daemon starts automatically and persists between commands.## When to use vs other tools- **Default** for shell-driven browser work (cheapest context, deterministic).- Use Playwright/Stagehand only when you need their specific ecosystem features.- Cross-platform: macOS (arm64/x64), Linux (arm64/x64), Windows (x64).Works with: Claude Code, Cursor, Copilot, Codex, Gemini, opencode, and any agent that runs shell commands.

Frequently asked questions