webapp-debugger

Automate browser interactions with Chrome DevTools MCP for debugging web applications.

1|Updated Dec 17, 2025
One-click install
npx skills add https://github.com/CAPHTECH/claude-marketplace --skill webapp-debugger
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: webapp-debugger
Source: https://github.com/CAPHTECH/claude-marketplace/tree/main/webapp-dev-plugin/skills/webapp-debugger
Command: npx skills add https://github.com/CAPHTECH/claude-marketplace --skill webapp-debugger

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires chrome-devtools, and includes references (resource) components.

What problem does it solve?

This Skill eliminates manual browser testing by automating UI interactions, network monitoring, and performance analysis.

Core Features & Use Cases

  • Browser Automation: Automates UI testing, form filling, and screenshot capture.
  • Use Case: When you need to verify code changes on localhost:3000, this Skill automatically navigates, interacts with elements, and captures debugging information automatically.

Quick Start

Open localhost:3000, take a snapshot to identify element UIDs, then click buttons and fill forms while monitoring for errors and performance issues.

Frequently Asked Questions about webapp-debugger

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

FAQPage Schema
How do I automate UI testing and debugging in my web application?

Automate UI testing by using browser automation to interact with elements, capture screenshots, and monitor console errors. Navigate to your app, take snapshots to identify UI elements, then programmatically click buttons, fill forms, and verify results while collecting debugging evidence.

Can I monitor network requests and performance while testing my web app?

Yes, network monitoring captures HTTP requests and responses during automated testing. Analyze network activity alongside performance traces to identify bottlenecks, failed requests, and latency issues without manual inspection of DevTools.

What's the best way to capture and diagnose UI layout and rendering issues?

Take automated screenshots at each step of your test workflow to visually verify UI state. Screenshots combined with console message logs and performance analysis pinpoint layout problems, rendering errors, and visual regressions across page interactions.

How do I set up automated testing for localhost web applications?

Open your localhost development server, establish a browser session, take an initial snapshot to map UI elements, then execute automated interactions like clicks and form fills while the Skill collects console logs, network data, and performance metrics for diagnosis.

Does this work for end-to-end testing and functional verification?

Yes, end-to-end testing workflows combine page navigation, element interaction, screenshot capture, and result verification. The Skill's comprehensive command set supports functional testing, error diagnostics, and performance audits across multi-step user scenarios.

What are the limitations when debugging complex interactive web applications?

Automation requires defining explicit wait conditions and interaction sequences. Complex dynamic behavior, real-time updates, and asynchronous operations may need careful timing configuration. Chrome DevTools integration limits debugging to Chromium-based browsers.