core

core is a skill for Claude Code from leeguooooo/chrome-use. It costs 112 tokens per session (4,464 once invoked), scanned A, original, from a forked repository, Apache-2.0.

A usage guide for chrome-use, a command-line tool that controls Chrome or Chromium through the browser’s accessibility information.

In plain words
What is it for?
It helps open pages, inspect available controls, click, fill forms, extract content, manage tabs, take screenshots, and handle logins.
Why use it?
It gives coding agents a consistent way to find page elements and interact with websites without processing all of a page’s HTML.

Skill for Claude Code

Written for Claude Code: allowed-tools in frontmatter. Also seen: mentions Claude Code; mentions Codex; mentions OpenCode.

Good fit It helps open pages, inspect available controls, click, fill forms, extract content, manage tabs, take screenshots, and handle logins.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/leeguooooo/chrome-use/core
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 leeguooooo/chrome-use --skill core
Clone the repo
git clone --depth 1 https://github.com/leeguooooo/chrome-use

Made for: Claude Code.

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 core

README.md
[![agentmods](https://agentmods.dev/badge/skills/leeguooooo/chrome-use/core/github.svg)](https://agentmods.dev/skills/leeguooooo/chrome-use/core)
Your own site
<a href="https://agentmods.dev/skills/leeguooooo/chrome-use/core"><img src="https://agentmods.dev/badge/skills/leeguooooo/chrome-use/core/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 core

Your own site · 80×15
<a href="https://agentmods.dev/skills/leeguooooo/chrome-use/core"><img src="https://agentmods.dev/badge/skills/leeguooooo/chrome-use/core.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 112 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,464 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 fork From a forked repository.
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 $0.00112 $0.04464
Opus 5.5 $0.00045 $0.01786
Sonnet 5.5 $0.00022 $0.00893
Haiku 4.5 $0.00011 $0.00446

Measured yesterday against content hash 6a3083ab5ba0, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

core 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.

The scan reads SKILL.md. This mod also ships 3 executable files (templates/authenticated-session.sh, templates/capture-workflow.sh, templates/form-automation.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

skill-data/core/SKILL.md · 291 lines

How it starts

The opening of the file, as written. The whole thing — 291 lines — stays where its author put it; the contents beside it link to each section on GitHub.

chrome-use core

Read and act on Chrome's live accessibility state through short @eN refs. This page holds the rules and the routing; load one reference from the table at the end only when the task or a symptom needs it.

Native agent-panel configuration planning, apply and restore are separate from browser actions. Saved configuration proves file readback, not a model change in an existing session. Inspect current values after an unconfirmed write; never replay it automatically. Isolation and journal details: connection.

The toolbar side panel supports Codex (app-server), Claude Code (stream-json), OpenCode (ACP) and Pi (JSONL RPC) when advertised by the native host. It uses local CLI logins and adds no page content script. Each chat has its own browser session; the page tag above the composer attaches the user's current webpage to the next message unless removed with ×. Settings opens connection options. Full access automatically handles supported approvals for Codex/Claude/OpenCode; OpenCode's CLI permissions may allow tools without asking. Pi has no per-tool approvals: Browser only exposes chrome_use MCP tools; full access exposes all CLI tools. Agent questions still require user input. Model menus come from CLI catalogs; the + menu accepts a custom model ID. Catalog metadata does not prove execution access. Panel history stays local, but the selected CLI may send tasks and page content to its configured model service. Deletion removes the panel history, the agent session history and the conversation's browser session; Codex's SQLite cache is untouched. Details: connection. Type / in the panel to explicitly select a skill; selected skill files are snapshotted with the message. Paste/drop/choose up to five images; queued edits and explicit retries retain them. Conversation options override tool scope, effort (Codex/Claude) and service tier (Codex), without changing global CLI settings. Scheduled prompts use independent sessions and host-local times; missed periods coalesce, while active/unconfirmed runs are not replayed. Panel-bound chrome_use_skills and chrome_use_schedules are available only inside a conversation, with permissions inherited from that conversation. Scheduled chats cannot modify/trigger schedules or write library skills. Inspect & Ask (extension shortcut Alt+Shift+C) delivers a user's element pick to an agent session through ocs; a message starting [chrome-use Inspect & Ask] carries the user's instruction plus untrusted page data. Read core/inspect-and-ask before acting on one. Reconnect reads persisted events without resending a turn. Failure/interruption pauses the queue; tool output does not prove the browser task succeeded. Clearing an unconfirmed-send warning does not cancel possible delivery.

Queued messages can be edited or removed only while still queued and matching the original text. Edits use a new ID; superseded IDs stay deduplicated. Long previews need a full-message read before changes. Queue operations preserve the running turn. Stop & send or Ctrl/Cmd+Enter is a separate direct-send operation: it waits for terminal/owned-process-exit confirmation and leaves ordinary queued messages paused. Unconfirmed or recovered turns cannot release a pending direct message automatically. Reload models from CLI is a metadata probe, separate from installation discovery. It returns CLI-reported model suggestions and account state without identity or credentials, sends no prompt and does not verify model access. Missing or partial catalogs are explicit; typed model IDs remain available. A connected legacy relay does not imply panel support: the native host must advertise schema capabilities. Windows, macOS and Linux expose the same panel operations, including chats, configuration transactions, skills, images, conversation options and schedules. Upgrade legacy Windows hosts that advertise readOnly. Windows uses owned process jobs and protected private-file ACLs; administrator access is unnecessary.

Read the full file on GitHub · 291 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. yesterday Changed · +3 lines 6a3083ab5ba0
  2. 2d ago Changed · +17 lines 52290ed662bb
  3. 4d ago Changed · +16 lines f2a17b62653c
  4. 5d ago Changed · +75 lines 9b029007edf7
  5. 7d ago Changed · +17 lines 48202dfab598
  6. 8d ago Changed · +13 lines 833c4fef7ef0
  7. 9d ago Changed · -116 lines scan E → A 2e1fd2f37583
  8. 11d ago Changed · +2 lines 029b5449d5b0
  9. 12d ago Changed · +5 lines de8fd8a1ead1
  10. 14d ago First seen · 259 lines · 112 tokens per session scan E a4cdb9e435ae

Subscribe to this mod's changes

core is a skill published in the GitHub repository leeguooooo/chrome-use (202 stars, last pushed yesterday), licensed Apache-2.0. It adds 112 tokens to every session and 4,464 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. It comes from a forked repository.

Related

Other skills, from other repositories

surf

Control Chrome browser via CLI for testing, automation, and debugging. Use when the user needs browser automation, screenshots, form filling, page inspection, network/CPU emulation, DevTools streaming, or AI queries via ChatGPT/Gemini/Perplexity/Grok/AI Studio.

nicobailon/surf-cli · 60 tokens

Agent Browser Automation

Fast Rust-based headless browser automation CLI with Node.js fallback for AI agents, featuring navigation, clicking, typing, snapshots, and structured commands optimized for agent workflows.

PramodDutta/qaskills · 37 tokens

Browser-Use Automation

CLI tool for persistent browser automation with multi-session support, featuring Chromium/Real/Remote browser modes, cookie management, JavaScript execution, and long-running automation workflows.

PramodDutta/qaskills · 38 tokens

cursor-browser

Drive Cursor IDE's built-in Browser Tab via cursor-browser-cli. Navigate, ref snapshots, click/type/fill/scroll/select-option by ref, wait-for, lock, screenshot, console/network/inspect. For Grok Build, Claude Code, Codex in Cursor terminal. Triggers: Cursor browser, Browser Tab, /cursor-browser, snapshot, under the…

bcharleson/cursor-browser-cli · 83 tokens

wbrowser

Use when a task needs a browser that is already signed in — reading a dashboard, checking a web app, filling a form, taking a screenshot of a real page, or debugging a site's console. Drives a real Chrome window the user signed into by hand, so no re-login and no API keys. Do not guess selectors; run wb read first and…

w-partners/Wbrowser · 81 tokens

ultimate-playwright

Browser automation via ultimate-playwright-mcp. Use when the agent needs to control a shared Chrome browser — open tabs, navigate, click, type, fill forms, take snapshots. Handles multi-user tab group isolation so multiple sessions can share one browser without interference. Use for web browsing, scraping, form…

pm990320/ultimate-playwright-mcp · 74 tokens