browser-control

browser-control is a skill for Claude Code, Codex from zwl467135974/lumina. It costs 50 tokens per session (810 once invoked), scanned A, original, Apache-2.0.

A browser-control skill that uses Playwright, a tool for driving a real web browser. It supports opening pages, reading their accessible structure, filling forms, clicking controls, handling tabs, and taking screenshots.

In plain words
What is it for?
Use it for web information collection, online document reading, form interaction, and checking how a web interface behaves or renders.
Why use it?
It provides a repeatable way to inspect and interact with websites instead of guessing at page structure or relying only on visual output. It also describes checks for dialogs, loading problems, console errors, and failed network requests.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it for web information collection, online document reading, form interaction, and checking how a web interface behaves or renders.

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Install with agentmods
npx agentmods add skills/zwl467135974/lumina/browser-control
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 zwl467135974/lumina --skill browser-control
Clone the repo
git clone --depth 1 https://github.com/zwl467135974/lumina

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-control

README.md
[![agentmods](https://agentmods.dev/badge/skills/zwl467135974/lumina/browser-control/github.svg)](https://agentmods.dev/skills/zwl467135974/lumina/browser-control)
Your own site
<a href="https://agentmods.dev/skills/zwl467135974/lumina/browser-control"><img src="https://agentmods.dev/badge/skills/zwl467135974/lumina/browser-control/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-control

Your own site · 80×15
<a href="https://agentmods.dev/skills/zwl467135974/lumina/browser-control"><img src="https://agentmods.dev/badge/skills/zwl467135974/lumina/browser-control.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 50 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 810 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 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 $0.00050 $0.00810
Opus 5.5 $0.00020 $0.00324
Sonnet 5 $0.00010 $0.00162
Haiku 4.5 $0.00005 $0.00081

Measured yesterday against content hash 56cd6b07949a, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-23, from the pricing page.

Security

Grade A, and why

browser-control scanned grade A with 0 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 yesterday.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

docs/skills/browser-control/SKILL.md · 55 lines

What it actually says

浏览器控制(Playwright)

通过 MCP 接入的官方 @playwright/mcp 工具面驱动真实浏览器。工具命名规则为 mcp__{server}__{tool},下文以 server 名 playwright 为例(实际前缀以当前 环境的 MCP 配置为准)。

核心工作流:快照 → 定位 → 操作 → 留证

  1. 打开页面mcp__playwright__browser_navigate(url)。等待加载完成后 先取结构化快照,不要急于截图。
  2. 读取结构mcp__playwright__browser_snapshot。返回页面的可访问性 树,每个可交互元素带 ref 编号——这是后续操作的定位依据。
  3. 定位操作browser_click(element, ref)browser_type(element, ref, text)browser_fill_form(fields)browser_select_option(element, ref, values)browser_press_key(key)必须使用快照中的 ref 定位,不要凭记忆猜 CSS 选择器;页面变化后重新取快照再操作。
  4. 视觉留证browser_take_screenshot 仅在需要视觉证据(布局、颜色、 渲染问题)时使用;结构化信息一律以快照为准,省 token 且更精确。

页面状态与多标签

  • 弹出对话框(alert/confirm/prompt):先 browser_handle_dialog(accept), 不要让对话框阻塞后续操作。
  • 新窗口/弹出页:操作后用 browser_tabs(action: "list") 观察全部标签页, browser_tabs(action: "select", index: n) 切换。
  • 等待动态内容:browser_wait_for(text=..., time=...),不要连续无脑重试。

排障顺序

页面不符合预期时按序排查:

  1. 重新 browser_snapshot 确认当前真实状态(可能已被重定向);
  2. browser_console_messages(level: "error") 看前端报错;
  3. browser_network_requests 确认关键请求是否成功(4xx/5xx/超时);
  4. 仍无头绪再截图人工判读。

纪律

  • 快照优先:能用快照解决的绝不用截图,能用文本绝不用视觉。
  • ref 时效:任何 click/type 之后页面可能变化,长流程中定期重新快照。
  • 数据落库:采集到的结构化数据写入任务结果或文件,不要只留在对话里。
  • 退出:任务结束调用 browser_close 释放浏览器进程。

边界

  • 浏览器运行在 Lumina 服务端所在主机,访问目标受部署层网络策略约束; 内网/环回地址可能被 --blocked-origins 拦截,属预期行为。
  • 文件系统访问默认限定工作区根目录,file:// 导航被禁用。
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. yesterday First seen · 55 lines · 50 tokens per session scan A 56cd6b07949a

Subscribe to this mod's changes

browser-control is a skill published in the GitHub repository zwl467135974/lumina (75 stars, last pushed yesterday), licensed Apache-2.0. It adds 50 tokens to every session and 810 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-23.

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