What is chrome-devtools?

Browser automation and performance analysis using executable Puppeteer scripts. Puppeteer is a tool for controlling Chrome or Chromium with code.

Use it to navigate pages, fill forms, take screenshots, inspect network activity, scrape pages, debug JavaScript, and analyze performance.

It removes the need to perform browser checks manually and helps inspect what a web page requests, displays, and runs.

chrome-devtools — Skill by LuizEduPP

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 skills/luizedupp/rememb/chrome-devtools

Any agent

npx skills add LuizEduPP/Rememb --skill chrome-devtools

Clone the repo

git clone --depth 1 https://github.com/LuizEduPP/Rememb

Made for: Claude Code, Codex.

Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,669 The whole file, excluding the scripts and references it only reads on demand.

Security scan B 1 finding. 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.

Model	Per session	Once invoked
Fable 5	$0.00042	$0.02669
Opus 5	$0.00021	$0.01334
Sonnet 5	$0.00008	$0.00534
Haiku 4.5	$0.00004	$0.00267

Measured yesterday against content hash 60db3229dbd2, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade B, and why

chrome-devtools scanned grade B with 1 finding 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 16 executable files (scripts/__tests__/selector.test.js, scripts/click.js, scripts/close-persistent.js, …), 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.

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

sudo apt-get install imagemagick

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

chrome-devtools — 86% identical, 87 lines differ

src/rememb_skills/chrome-devtools/SKILL.md · 382 lines

How it starts

The opening of the file, as written. The whole thing — 382 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Chrome DevTools Agent Skill

Browser automation via executable Puppeteer scripts. All scripts output JSON for easy parsing.

Quick Start

CRITICAL: Always check pwd before running scripts.

Installation

Step 1: Install System Dependencies (Linux/WSL only)

On Linux/WSL, Chrome requires system libraries. Install them first:

pwd  # Should show current working directory
cd <skill-root>/scripts
./install-deps.sh  # Auto-detects OS and installs required libs

Supports: Ubuntu, Debian, Fedora, RHEL, CentOS, Arch, Manjaro

macOS/Windows: Skip this step (dependencies bundled with Chrome)

Step 2: Install Node Dependencies

npm install  # Installs puppeteer, debug, yargs

Step 3: Install ImageMagick (Optional, Recommended)

ImageMagick enables automatic screenshot compression to keep files under 5MB:

macOS:

brew install imagemagick

Ubuntu/Debian/WSL:

sudo apt-get install imagemagick

Verify:

magick -version  # or: convert -version

Without ImageMagick, screenshots >5MB will not be compressed (may fail to load in AI vision APIs with 5MB limits).

Test

node navigate.js --url <page-url>
# Output: {"success": true, "url": "<page-url>", "title": "Page Title"}

Available Scripts

All scripts are in <skill-root>/scripts/

CRITICAL: Always check pwd before running scripts.

Script Usage

./scripts/README.md

Core Automation

navigate.js - Navigate to URLs
screenshot.js - Capture screenshots (full page or element)
click.js - Click elements
fill.js - Fill form fields
evaluate.js - Execute JavaScript in page context

Analysis & Monitoring

snapshot.js - Extract interactive elements with metadata
console.js - Monitor console messages/errors
network.js - Track HTTP requests/responses
performance.js - Measure Core Web Vitals + record traces

Usage Patterns

Single Command

pwd  # Should show current working directory
cd <skill-root>/scripts
node screenshot.js --url <page-url> --output ./docs/screenshots/page.png
node screenshot.js --url <page-url> --output ./docs/screenshots/page.png

Important: Always save screenshots to ./docs/screenshots directory.

Read the full file on GitHub · 382 lines

Files

What ships with it

25 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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.

yesterday First seen · 382 lines · 42 tokens per session scan B 60db3229dbd2

Subscribe to this mod's changes

chrome-devtools is a skill published in the GitHub repository LuizEduPP/Rememb (4 stars, last pushed 1mo ago), licensed MIT. It adds 42 tokens to every session and 2,669 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it B with 1 finding (asks for root). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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chrome-devtools