# 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.

- Skill: `agentskillexchange/puppeteer-screenshot-diff-engine` (Agent Skill)
- Install (CLI): `npx skillmds@latest add agentskillexchange/puppeteer-screenshot-diff-engine`
- Raw SKILL.md: https://api.skillmd.com/api/skills/agentskillexchange/puppeteer-screenshot-diff-engine/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: agentskillexchange (https://skillmd.com/u/agentskillexchange)
- Updated: 2026-09-08
- Page: https://skillmd.com/skills/agentskillexchange/puppeteer-screenshot-diff-engine

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# 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

Use the upstream install or setup path that matches your environment:
- npm i puppeteer # Downloads compatible Chrome during installation.
- npm i puppeteer-core # Alternatively, install as a library, without downloading Chrome.

Basic usage or getting-started notes:
- bash npm2yarn
- ## MCP
- a Puppeteer-based MCP server for browser automation and debugging.

- Source: https://github.com/puppeteer/puppeteer
- Extracted from upstream docs: https://raw.githubusercontent.com/puppeteer/puppeteer/HEAD/README.md

## Documentation

- https://pptr.dev/

## Source

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