browser

A set of instructions for using a browser tool with Cursor, a code editor. It applies when a task needs browser automation, screenshots, web-page collection, or form interaction.

In plain words
What is it for?
Use it when a coding task must open websites, capture screenshots, scrape pages, or fill in forms through a browser.
Why use it?
It gives browser-related tasks a consistent procedure and points them to the required shared browser instructions.

Cursor rule

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.

agentmods
npx agentmods add rules/zhagqn/agentwork/browser
Clone the repo
git clone --depth 1 https://github.com/zhagqn/agentwork
Per session 84 This file is loaded in full into every session.
When invoked 84 The same file — it is already loaded in full.
Security scan A 0 findings. Scan, not verified.
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 $0.00084 $0.00084
Opus 5 $0.00042 $0.00042
Sonnet 5 $0.00017 $0.00017
Haiku 4.5 $0.00008 $0.00008

Measured 2d ago against content hash 498d93341083, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

browser 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 2d 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.

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.

.agentwork/tools/browser/cursor/rules/browser.mdc · 13 lines

What it actually says


description: browser tool rule for Cursor globs: [] alwaysApply: false

browser-tool

当任务需要浏览器自动化、截图、抓取、表单交互时:

  • 先读取 .shared/skills/browser/SKILL.md
  • 执行时统一通过 .shared/skills/browser/scripts/browser-run.sh
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. 2d ago First seen · 13 lines · 84 tokens per session scan A 498d93341083

Subscribe to this mod's changes

browser is a cursor rule published in the GitHub repository zhagqn/agentwork (57 stars, last pushed 11d ago), licensed MIT. It adds 84 tokens to every session, about $0.0004 per session on Opus 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 2026-08-30.