Agent skill

Claude In Chrome

by asgeirtj in asgeirtj/system_prompts_leaks

Automates your Chrome browser to interact with web pages - clicking elements, filling forms, capturing screenshots, reading console logs, and navigating sites.

CC0-1.0Auto-check passedProductivity & Automation

Install Claude In Chrome

skills CLI
$ npx skills add asgeirtj/system_prompts_leaks --skill claude-in-chrome -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install asgeirtj/system_prompts_leaks claude-in-chrome --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/asgeirtj/system_prompts_leaks.git skills-src && mkdir -p .claude/skills && cp -r skills-src/Anthropic/claude-code/skills/claude-in-chrome .claude/skills/claude-in-chrome && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
claude-in-chrome
GitHub stars
69k
Token cost
~1.2k tokens
SKILL.md length
564 words
Files
1
Skills in repo
128
Repo updated
First seen
Licence
CC0-1.0

At a glance

Automates your Chrome browser to interact with web pages - clicking elements, filling forms, capturing screenshots, reading console logs, and navigating sites.

  • Works in 3 steps: Avoid clicking buttons or links that may… → If you must interact with such elements,… → Use mcpclaude-in-chromejavascript_tool…
  • Productivity & Automation work in your project
  • SKILL.md covers Loading deferred tools, GIF recording, Console log debugging and Alerts and dialogs, plus 2 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Claude In Chrome is an agent skill from asgeirtj/system_prompts_leaks. Automates your Chrome browser to interact with web pages - clicking elements, filling forms, capturing screenshots, reading console logs, and navigating sites. Opens pages in new tabs within your existing Chrome session. Requires site-level permissions before executing (configured in the extension).

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Productivity & Automation. It works with Model Context Protocol. The repository describes itself as: Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Google - Gemini 3.8 Flash, 3.1 Pro… The licence is CC0-1.0.

When your agent uses it

  • Productivity & Automation work in your project

Example prompts

  • “Use the claude-in-chrome skill to automate your Chrome browser to interact with web pages - clicking elements, filling forms, capturing screenshots…”
  • “/claude-in-chrome”

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Avoid clicking buttons or links that may trigger alerts (e.g., "Delete" buttons with confirmation dialogs)
  2. If you must interact with such elements, warn the user first that this may interrupt the session
  3. Use mcpclaude-in-chromejavascript_tool to check for and dismiss any existing dialogs before proceeding

What it can do on your machine

Read from SKILL.md and the folder at commit 60d44cc. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Claude In Chrome loads about 1.2k tokens when it runs. Until then it costs about 79 tokens; SKILL.md has 564 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~79
When it runs · the whole SKILL.md, loaded when a task matches
~1.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from asgeirtj/system_prompts_leaks at commit 60d44cc, republished under its CC0-1.0 licence (© asgeirtj). 564 words, ~1,173 tokens.

Download SKILL.mdSave it as .claude/skills/claude-in-chrome/SKILL.md (or your agent's skills folder).
name
claude-in-chrome
description
Automates your Chrome browser to interact with web pages - clicking elements, filling forms, capturing screenshots, reading console logs, and navigating sites. Opens pages in new tabs within your existing Chrome session. Requires site-level permissions before executing (configured in the extension).
when_to_use
When the user wants to interact with web pages, automate browser tasks, capture screenshots, read console logs, or perform any browser-based actions. Always…

Claude in Chrome browser automation

You have access to browser automation tools (mcp__claude-in-chrome__*) for interacting with web pages in Chrome. Follow these guidelines for effective browser automation.

Loading deferred tools

If the mcp__claude-in-chrome__* tools are deferred (must be loaded via ToolSearch before use), load every tool you expect to need in ONE ToolSearch call — the select query accepts a comma-separated list — never one call per tool. Start with the core set:

ToolSearch with query "select:mcp__claude-in-chrome__tabs_context_mcp,mcp__claude-in-chrome__navigate,mcp__claude-in-chrome__computer,mcp__claude-in-chrome__read_page,mcp__claude-in-chrome__tabs_create_mcp,mcp__claude-in-chrome__tabs_close_mcp"

Add task-specific tools to the same call when the task obviously needs them: read_console_messages / read_network_requests for debugging, form_input for forms, gif_creator for recordings, javascript_tool for page scripting.

GIF recording

When performing multi-step browser interactions that the user may want to review or share, use mcp__claude-in-chrome__gif_creator to record them.

You must ALWAYS:

  • Capture extra frames before and after taking actions to ensure smooth playback
  • Name the file meaningfully to help the user identify it later (e.g., "login_process.gif")

Console log debugging

You can use mcp__claude-in-chrome__read_console_messages to read console output. Console output may be verbose. If you are looking for specific log entries, use the 'pattern' parameter with a regex-compatible pattern. This filters results efficiently and avoids overwhelming output. For example, use pattern: "[MyApp]" to filter for application-specific logs rather than reading all console output.

Alerts and dialogs

IMPORTANT: Do not trigger JavaScript alerts, confirms, prompts, or browser modal dialogs through your actions. These browser dialogs block all further browser events and will prevent the extension from receiving any subsequent commands. Instead, when possible, use console.log for debugging and then use the mcp__claude-in-chrome__read_console_messages tool to read those log messages. If a page has dialog-triggering elements:

  1. Avoid clicking buttons or links that may trigger alerts (e.g., "Delete" buttons with confirmation dialogs)
  2. If you must interact with such elements, warn the user first that this may interrupt the session
  3. Use mcp__claude-in-chrome__javascript_tool to check for and dismiss any existing dialogs before proceeding

If you accidentally trigger a dialog and lose responsiveness, inform the user they need to manually dismiss it in the browser.

Show full SKILL.md (229 more words)Show less

Avoid rabbit holes and loops

When using browser automation tools, stay focused on the specific task. If you encounter any of the following, stop and ask the user for guidance:

  • Unexpected complexity or tangential browser exploration
  • Browser tool calls failing or returning errors after 2-3 attempts
  • No response from the browser extension
  • Page elements not responding to clicks or input
  • Pages not loading or timing out
  • Unable to complete the browser task despite multiple approaches

Explain what you attempted, what went wrong, and ask how the user would like to proceed. Do not keep retrying the same failing browser action or explore unrelated pages without checking in first.

Tab context and session startup

IMPORTANT: At the start of each browser automation session, call mcp__claude-in-chrome__tabs_context_mcp first to get information about the user's current browser tabs. Use this context to understand what the user might want to work with before creating new tabs.

Never reuse tab IDs from a previous/other session. Follow these guidelines:

  1. Only reuse an existing tab if the user explicitly asks to work with it
  2. Otherwise, create a new tab with mcp__claude-in-chrome__tabs_create_mcp
  3. If a tool returns an error indicating the tab doesn't exist or is invalid, call tabs_context_mcp to get fresh tab IDs
  4. When a tab is closed by the user or a navigation error occurs, call tabs_context_mcp to see what tabs are available

© asgeirtj, CC0-1.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in Anthropic/claude-code/skills/claude-in-chrome of asgeirtj/system_prompts_leaks.

Open the folder on GitHubat commit 60d44cc

Compare with similar skills

Claude In Chrome next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Claude In Chrome compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Claude In Chrome this skillasgeirtj/system_prompts_leaks69k—~1.2kAutomated safety check: PassCC0-1.0
N8n Docs Assistantn8n-io/n8n207k—~550Automated safety check: PassCustom licence
Planningn8n-io/n8n207k—~2.5kAutomated safety check: PassCustom licence
AgentRQ Workspace Agentagentrq/agentrq1.1k—~1.9kAutomated safety check: PassAGPL-3.0
Suggest Automationsn8n-io/n8n207k—~2kAutomated safety check: PassCustom licence
Webctlcosinusalpha/webctl419—~1.7kAutomated safety check: PassNone

Similar skills

  • Official

    Answers n8n product, setup, credential, node, hosting, API, and usage questions from current n8n docs.

    207k GitHub stars~550 tokensUpdated today
    Productivity & AutomationAuto-check passed
  • Planning

    n8n-io/n8n

    Official

    ONLY for coordinated multi-artifact work: multiple workflows with dependencies, shared data-table schema/migration across tasks, or the user explicitly asked to review a plan first.

    207k GitHub stars~2.5k tokensUpdated today
    Productivity & AutomationAuto-check passed
  • Guides a workspace agent through executing assigned tasks, replying to a remote human operator, and creating sub-tasks, memory and events inside an AgentRQ workspace.

    1.1k GitHub stars~1.9k tokensUpdated today
    Productivity & AutomationAuto-check passed
  • Official

    Offer the three most common automations for a user as a single-choice card, from your own knowledge of their team and their apps, then build the one they choose once they confirm, or offer more.

    207k GitHub stars~2k tokensUpdated today
    Productivity & AutomationAuto-check passed
  • Webctl

    cosinusalpha/webctl

    Browser automation via CLI. An agent skill from cosinusalpha/webctl.

    419 GitHub stars~1.7k tokensUpdated 4 mo ago
    Productivity & AutomationAuto-check passed
  • Huge AI Search

    wangwingzero/huge-ai-search

    Searches the live web through Google AI Mode via Huge AI Search (MCP or CLI).

    144 GitHub stars~563 tokensUpdated 1 mo ago
    Productivity & AutomationAuto-check passed

More from asgeirtj/system_prompts_leaks

All 125 skills in this repo
  • Fleet Manager for Agent Sessions

    asgeirtj/system_prompts_leaks

    Shows one digest of coding-agent sessions across your connected machines and lets you open, read, steer, approve, stop and close them, over Herdr, tmux or MSP.

    69k GitHub stars~2.5k tokensUpdated yesterday
    Auto-check passed
  • Muse Code Product Doctor

    asgeirtj/system_prompts_leaks

    Diagnoses a Muse Code installation's own failures from binary and session evidence, instead of treating the report as an ordinary repository bug.

    69k GitHub stars~3.5k tokensUpdated yesterday
    Auto-check passed
  • DOCX

    asgeirtj/system_prompts_leaks

    A skill your agent uses whenever the user wants to create, read, edit, or manipulate Word documents (.docx) or Word templates (.dotx).

    69k GitHub stars~1.9k tokensUpdated yesterday
    Auto-check passed
  • Agents Project Coordinator

    asgeirtj/system_prompts_leaks

    Runs a goal as a project in which the agent coordinates separate agent threads, judging when to split the work, and interviews you first when nothing can be verified.

    69k GitHub stars~2.9k tokensUpdated yesterday
    Auto-check passed
  • Muse Plugin Creator

    asgeirtj/system_prompts_leaks

    Creates and validates a new native Muse plugin package in the current workspace, limited to five capability families, and leaves installation to you.

    69k GitHub stars~1.8k tokensUpdated yesterday
    Auto-check passed
  • Deep Research

    asgeirtj/system_prompts_leaks

    A skill your agent uses when the user's prompt requires (1) researching a topic across multiple sources, comparing options or alternatives, analyzing trends or history, understanding markets or…

    69k GitHub stars~3.3k tokensUpdated yesterday
    Auto-check passed

Questions about Claude In Chrome

What does Claude In Chrome do?

Automates your Chrome browser to interact with web pages - clicking elements, filling forms, capturing screenshots, reading console logs, and navigating sites. Claude In Chrome is an agent skill from asgeirtj/system_prompts_leaks. Automates your Chrome browser to interact with web pages - clicking elements, filling forms, capturing screenshots, reading console logs, and navigating sites.

When should I use Claude In Chrome?

Claude In Chrome fits situations like: productivity & Automation work in your project.

How do I install Claude In Chrome in Claude Code?

Run `npx skills add asgeirtj/system_prompts_leaks --skill claude-in-chrome -a claude-code`. Or copy the skill folder (Anthropic/claude-code/skills/claude-in-chrome in asgeirtj/system_prompts_leaks) into .claude/skills/claude-in-chrome in your project. Claude Code loads it when a task matches its description.

How do I install Claude In Chrome in Codex?

Run `npx skills add asgeirtj/system_prompts_leaks --skill claude-in-chrome -a codex`. Or copy the skill folder (Anthropic/claude-code/skills/claude-in-chrome in asgeirtj/system_prompts_leaks) into .agents/skills/claude-in-chrome in your project. Codex loads it when a task matches its description.

Can I use Claude In Chrome in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add asgeirtj/system_prompts_leaks --skill claude-in-chrome -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/claude-in-chrome, .gemini/skills/claude-in-chrome, .github/skills/claude-in-chrome and .opencode/skills/claude-in-chrome in your project.

What does Claude In Chrome need to run?

SKILL.md names no scripts, command-line tools or credentials: Claude In Chrome is instructions for the agent only.

Does Claude In Chrome access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Claude In Chrome safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Claude In Chrome use?

Claude In Chrome is published under the CC0-1.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Claude In Chrome use?

About 1.2k tokens (SKILL.md is roughly 4.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Claude In Chrome?

Skills that share tags, products or a category with Claude In Chrome: N8n Docs Assistant (n8n-io/n8n, 207k stars), Planning (n8n-io/n8n, 207k stars), AgentRQ Workspace Agent (agentrq/agentrq, 1.1k stars) and Suggest Automations (n8n-io/n8n, 207k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Claude In Chrome?

asgeirtj (a GitHub user) maintains it in asgeirtj/system_prompts_leaks, which has 69,280 GitHub stars. The repository holds 128 skills in this directory. The repository was last updated on October 10, 2026.

Source: asgeirtj/system_prompts_leaks on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.