browser-harness

browser-harness is a skill for Claude Code, Codex from Ikalus1988/MisakaNet. It costs 39 tokens per session (1,509 once invoked), scanned C, original, Apache-2.0.

A command-line browser control tool that connects to Chrome through its remote debugging interface.

In plain words
What is it for?
Use it to open tabs, inspect pages, automate browser tasks, fill forms, scrape content, and capture screenshots.
Why use it?
It lets an agent interact with real web pages when ordinary requests are insufficient, including pages with anti-bot checks.

Skill for Claude CodeCodex

Which agent this was written for is unclear — built for openclaw. Also seen: built for openclaw.

Good fit Use it to open tabs, inspect pages, automate browser tasks, fill forms, scrape content, and capture screenshots.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ikalus1988/misakanet/browser-harness
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add Ikalus1988/MisakaNet --skill browser-harness
Clone the repo
git clone --depth 1 https://github.com/Ikalus1988/MisakaNet

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for browser-harness

README.md
[![agentmods](https://agentmods.dev/badge/skills/ikalus1988/misakanet/browser-harness/github.svg)](https://agentmods.dev/skills/ikalus1988/misakanet/browser-harness)
Your own site
<a href="https://agentmods.dev/skills/ikalus1988/misakanet/browser-harness"><img src="https://agentmods.dev/badge/skills/ikalus1988/misakanet/browser-harness/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for browser-harness

Your own site · 80×15
<a href="https://agentmods.dev/skills/ikalus1988/misakanet/browser-harness"><img src="https://agentmods.dev/badge/skills/ikalus1988/misakanet/browser-harness.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 39 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,509 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00039 $0.01509
Opus 5 $0.00019 $0.00754
Sonnet 5 $0.00008 $0.00302
Haiku 4.5 $0.00004 $0.00151

Measured 5d ago against content hash 4b1f156b560b, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade C, and why

browser-harness scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -fsSL https://browser-use.com/profile.sh | sh

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -fsSL https://browser-use.com/profile.sh | sh
archive/skills/browser-harness.SKILL.md · 155 lines

How it starts

The opening of the file, as written. The whole thing — 155 lines — stays where its author put it; the contents beside it link to each section on GitHub.

browser-harness

AI 直连 Chrome 的薄 CDP 层。给 AI 一个 WebSocket,就能控制真实浏览器,AI 自己写辅助代码适应任何网站。

核心原则

  • AI 是用户,不是人 — 框架为 AI 设计,不是为人设计的 UI
  • 缺失即创造 — 遇到不会的,AI 自己写 agent_helpers.py 学会
  • CDP 是接口 — 直接给模型 Chrome DevTools Protocol,不抽象掉

快速开始

安装

# clone 到持久目录
git clone https://github.com/browser-use/browser-harness ~/Developer/browser-harness
cd ~/Developer/browser-harness

# 创建虚拟环境
uv venv .venv && source .venv/bin/activate
uv pip install -e .

# 连接到 Chrome(方式一:已有的 Chrome 开了 remote-debugging)
BU_CDP_URL=http://127.0.0.1:9222 browser-harness -c 'print(page_info())'

# 方式二:让 harness 启动云浏览器(需 BROWSER_USE_API_KEY)
start_remote_daemon("work")

连接 Chrome

方式 1 — 已有 Chrome 开 remote debugging(推荐): Chrome 菜单 → chrome://inspect/#remote-debugging → 勾选 "Allow remote debugging"

BU_CDP_URL=http://127.0.0.1:9222 browser-harness -c 'print(page_info())'

方式 2 — 隔离 profile:

google-chrome --remote-debugging-port=9222 --user-data-dir=/tmp/chrome-harness
BU_CDP_URL=http://127.0.0.1:9222 browser-harness -c '...'

常用命令

browser-harness -c 'new_tab("https://example.com"); wait_for_load(); print(page_info())'
browser-harness -c 'capture_screenshot()'
browser-harness -c 'new_tab("https://example.com"); wait_for_load(); js("document.title")'

核心 API

函数 作用
new_tab(url) 新标签页打开 URL(不干扰当前页面)
goto_url(url) 在当前标签页导航
wait_for_load() 等待页面加载完成
page_info() 返回 {url, title, w, h, sx, sy, pw, ph}
capture_screenshot() 截图,返回文件路径 /tmp/shot.png
js(expr) 在页面执行 JS 表达式
click_at_xy(x, y) 坐标点击(穿透 iframe/shadow DOM)
scroll(dx, dy) 滚动页面
cdp(domain, method, **params) 直调 CDP
list_tabs() 列出所有标签页

表单填写

# 方式:js() 直接操作 DOM
browser-harness -c 'js(\'document.querySelector("input[name=custname]").value = "测试用户"\')'
# 验证
browser-harness -c 'js("return document.querySelector(\'input[name=custname]\').value")'

CDP 直调

# 任何 helper 没覆盖的,用 cdp()
cdp("Runtime.evaluate", expression="1+1", returnByValue=True)
# → {'result': {'type': 'number', 'value': 2}}

Read the full file on GitHub · 155 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 155 lines · 39 tokens per session scan C 4b1f156b560b

Subscribe to this mod's changes

browser-harness is a skill published in the GitHub repository Ikalus1988/MisakaNet (466 stars, last pushed yesterday), licensed Apache-2.0. It adds 39 tokens to every session and 1,509 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.

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