browser-harness

Let Claude Code, Codex or Cursor use your real Chrome, logged in as you. One prompt to set up. Open source, MIT.

Generate Convert Improve

Install / Use

npx skills add browser-use/browser-harness

Installs into whichever agent you are using.

About this skill

🤖

CLAUDE.md

Claude Code project instructions

Quality Score

87/100

Our assessment of browser-harness

browser-harness scores 87/100 on our quality scale, 1686th of 2,930 Automation skills we index.

Its CLAUDE.md is 3.1 KB long, split into 7 sections with 2 code examples: a solid amount of guidance for an agent.

With 18,433 GitHub stars, it is one of the more widely adopted skills in the catalogue.

Substance

26/30

Structure

16/20

Description

12/15

Adoption

18/20

Freshness

15/15

Maintenance, license and trust

The repository was last updated today, so browser-harness is actively maintained.
It is released under the MIT license, a permissive license that allows use, modification and commercial use with attribution.
Its trust signals score 100/100, with no cautions. These come from repository metadata, not a code audit — read the skill file before letting an agent act on it.

browser-harness compared with similar skills

All 4 of these similar skills score higher than browser-harness; compare them before choosing.

Skill	Score	Stars	Updated	Format
browser-harness (this skill)by browser-use	87	18.4k	today	CLAUDE.md
claude-memby thedotmack	100	100.8k	1d ago	CLAUDE.md
Agent-Reachby Panniantong	100	97.4k	6d ago	CLAUDE.md
taste-skillby Leonxlnx	100	96.6k	today	CLAUDE.md
Understand-Anythingby Egonex-AI	100	86.3k	2d ago	CLAUDE.md

Frequently asked questions

How do I install browser-harness?: Run npx skills add browser-use/browser-harness. The install tabs above show the steps for each supported agent.
Which AI agents does browser-harness work with?: It is written for Claude Code, Cursor and OpenAI Codex, as a CLAUDE.md file. Other agents that read the same format can often use it too.
Is browser-harness safe to use?: It is MIT-licensed and scores 100/100 on trust signals. Skills are instructions an agent will follow, so read the file before installing it and do not approve commands you do not understand.
Is browser-harness still maintained?: The repository was last updated today, so browser-harness is actively maintained.

Skill content

View source on GitHub

Browser Harness ♞

Browser Harness lets Claude Code, Codex or Cursor use your real Chrome browser: open pages, click, type, read and download, logged in as you. Paste one prompt into your coding agent to set it up. It talks to Chrome over the DevTools Protocol (CDP), and the agent writes any missing helper as it works, so the harness gets better with each task. Open source, MIT licensed.

Try browser-harness in Browser Use Cloud or paste the setup prompt into your coding agent.

  ● agent: wants to upload a file
  │
  ● agent-workspace/agent_helpers.py → helper missing
  │
  ● agent writes it                         agent_helpers.py
  │                                                       + custom helper
  ✓ file uploaded

You will never use the browser again.

See it work

Task: "Open my X profile, find my latest 20 video posts, and download them."

Setup prompt

Paste into Claude Code or Codex:

Install or upgrade browser-harness to the latest stable version with uv using Python 3.12, register the skill from `browser-harness skill`, and connect it to my browser. Ask whether I want local browser recordings enabled; default to no and preserve my existing preference on upgrades. Follow https://github.com/browser-use/browser-harness/blob/main/install.md if setup or connection fails.

The agent will open chrome://inspect/#remote-debugging. On first setup, tick the checkbox so the agent can connect to your browser:

How it works

install.md connects the agent to your browser.
SKILL.md teaches it the browser workflow.
src/browser_harness/ stays protected while the agent writes reusable helpers in its local workspace.

Scale with Browser Use Cloud

Use your local browser for logged-in, personal work. When you want many browsers in parallel—with live previews, proxies, stealth, CAPTCHA solving, and more—scale with Browser Use Cloud.

MCP server

browser-harness-mcp exposes the browser control helpers as MCP tools over stdio, so any MCP client (Claude Code, Devin, Cursor, etc.) can drive the browser without writing a second CDP layer. See docs/MCP.md for setup and client configuration.

Contributing

Bug fixes, documentation improvements, and agent-generated domain skills are welcome. See CONTRIBUTING.md.

The Bitter Lesson of Agent Harnesses · Web Agents That Actually Learn

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browser-use

View profile

View on GitHub

GitHub Stars18.4k

CategoryAutomation

Updated6h ago

Forks1.8k

browser-use/browser-harness

Languages

Python

Trust signals

100/100

From repository metadata: license, adoption, age and documentation. Not a code audit — see the Safety scan above for what the skill file itself contains.

No cautions