visual-validate

Automate visual UI validation with real browser sessions and before/after screenshots.

12|1|Updated Feb 13, 2026

Search Tags:#screenshots #mcp #ui-testing #browser-automation #visual-validation #console-capture

Ready to run

npx skills add https://github.com/helderberto/agent-skills --skill visual-validate-helderberto

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: visual-validate
Source: https://github.com/helderberto/agent-skills/tree/main/skills/visual-validate
Command: npx skills add https://github.com/helderberto/agent-skills --skill visual-validate-helderberto

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Automates visual UI validation by executing real browser sessions, capturing before/after screenshots, and reporting console errors and layout differences to speed up regression testing.

Core Features & Use Cases

Real-browser validation via MCP (Chrome DevTools or Playwright)
Take baseline and after screenshots and compare
Capture console errors and network requests
Use when validating UI changes after code commits or design updates

Quick Start

Run visual-validate on a live page to capture before/after visuals and console output.

Frequently Asked Questions about visual-validate

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I automate visual regression testing for UI changes in a real browser?▼

Automate visual regression testing by driving a real MCP browser session to capture baseline and post-change screenshots, then compare them to detect layout differences. It also captures console errors and network requests to speed up regression validation.

What is visual validation in browser automation and when do I need it?▼

Visual validation in browser automation is the process of capturing before and after screenshots during UI changes to detect visual regressions. You need it when validating UI updates after code commits or design changes to ensure layout consistency.

Do I need Chrome DevTools MCP to run visual validation, or can I use Playwright?▼

You do not strictly need Chrome DevTools MCP; Chrome DevTools is preferred, but Playwright is supported as a fallback. An available MCP is required to drive the real browser sessions, capture screenshots, and collect console output.

What's the best way to capture console errors and screenshots during UI regression testing?▼

The best way to capture console errors and screenshots during UI regression testing is using a real-browser MCP session that automatically collects baseline and post-change visuals alongside console logs, network requests, and a summary verdict of the results.

What limitations should I expect when using MCP for automated visual validation?▼

Limitations of MCP-based visual validation include the requirement of an active MCP connection to drive the browser session. If neither Chrome DevTools nor Playwright MCP is available, the tool cannot capture screenshots, console output, or generate a summary verdict.