addyosmani/agent-skills

browser-testing-with-devtools

Tests in real browsers via Chrome DevTools MCP. Use when building or debugging anything that runs in a browser. Use when you need to inspect the DOM, capture console errors, analyze network requests, profile performance, or verify visual output with real runtime data. Requires the chrome-devtools MCP server to be configured.

27K installs 92K starsUpdated Aug 29, 2026License: MIT

Install

npx skills add addyosmani/agent-skills@browser-testing-with-devtools

Runs in your terminal. Adds the skill globally for Claude Code, Cursor, Codex and others; add -g -y to skip prompts.

What it does

Browser Testing with DevTools Overview Use Chrome DevTools MCP to give your agent eyes into the browser. This bridges the gap between static code analysis and live browser execution — the agent can see what the user sees, inspect the DOM, read console logs, analyze network requests, and capture performance data. Instead of guessing what's happening at runtime, verify it. When to Use - Building or modifying anything that renders in a browser - Debugging UI issues (layout, styling, interaction) - Diagnosing console errors or warnings - Analyzing network requests and API responses - Profiling…

Excerpt from the skill's own SKILL.md. Read the full file on GitHub before installing: skills run with your agent's permissions.

View source on GitHub

Before you install

Skills are plain text instructions the agent follows, sometimes with scripts. Check the source, prefer repositories with many installs and stars, and read any script it ships.

Categories

Related skills

  • code-review-and-quality

    addyosmani/agent-skills

    Conducts multi-axis code review. Use before merging any change. Use when reviewing code written by yourself, another agent, or a human. Use when you need to assess code quality across multiple dimensions before it enters the main branch.

    36K installs 92KSecurityAI & agentsCode review
  • frontend-ui-engineering

    addyosmani/agent-skills

    Builds production-quality, accessible, responsive user-facing UIs. Use when building or modifying interfaces and pages, creating components, implementing layouts, meeting WCAG accessibility requirements, managing state, or when the output needs to look and feel production-quality rather than AI-generated.

    32K installs 92KDesign & UIReact & Next.js
  • security-and-hardening

    addyosmani/agent-skills

    Hardens code against vulnerabilities. Use when handling user input, authentication, data storage, or external integrations. Use when building any feature that accepts untrusted data, manages user sessions, or interacts with third-party services. Use when personal data or privacy compliance (GDPR, CCPA) is involved.

    32K installs 92KSecurityData
  • planning-and-task-breakdown

    addyosmani/agent-skills

    Breaks work into ordered tasks. Use when you have a spec or clear requirements and need to break work into implementable tasks. Use when a task feels too large to start, when you need to estimate scope, or when parallel work is possible.

    32K installs 92KTestingAI & agentsProductivity
  • spec-driven-development

    addyosmani/agent-skills

    Creates specs before coding. Use when starting a new project, feature, or significant change and no specification exists yet. Use when requirements are unclear, ambiguous, or only exist as a vague idea. Use when a single requirement spans several independently testable capabilities and needs decomposing into a capability map of modules before specifying.

    31K installs 92KWriting
  • performance-optimization

    addyosmani/agent-skills

    Optimizes application performance across frontend, backend, queries, and databases. Use when performance requirements exist, when you suspect performance regressions, when Core Web Vitals or load times need improvement, when N+1 query patterns need fixing, or when profiling reveals bottlenecks.

    31K installs 92K

Search skills

/skills/addyosmani/agent-skills/browser-testing-with-devtools/