---
title: "Puppeteer Screenshot Diff Engine"
description: "Visual regression testing using Puppeteer page.screenshot() with pixelmatch comparison. Leverages CDP sessions via page.createCDPSession() for precise viewport emulation and network throttling."
verification: "security_reviewed"
source: "https://github.com/puppeteer/puppeteer"
category:
  - "Browser Automation"
framework:
  - "Claude Code"
tool_ecosystem:
  github_repo: "puppeteer/puppeteer"
  github_stars: 94115
---

# Puppeteer Screenshot Diff Engine

Visual regression testing using Puppeteer page.screenshot() with pixelmatch comparison. Leverages CDP sessions via page.createCDPSession() for precise viewport emulation and network throttling.

## Installation

Choose whichever fits your setup:

1. Copy this skill folder into your local skills directory.
2. Clone the repo and symlink or copy the skill into your agent workspace.
3. Add the repo as a git submodule if you manage shared skills centrally.
4. Install it through your internal provisioning or packaging workflow.
5. Download the folder directly from GitHub and place it in your skills collection.

## Source

- [Agent Skill Exchange](https://agentskillexchange.com/skills/puppeteer-screenshot-diff-engine/)