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What Are Agent Skills?
1.1The Problem with Traditional Browser AutomationFor over two decades, browser test automation has followed the same pattern: a human writes a deterministic script that issues precise…1.2Enter the AI Coding AgentAI coding agents -- Claude Code, Cursor, Gemini CLI, Codex CLI -- are neither scripts nor chatbots. They are autonomous systems that read…1.3What Agent Skills AreAgent skills are reusable capability packages for AI coding agents: markdown files that teach the agent how to accomplish domain-specific…1.4Skills vs. Other ApproachesSkills occupy a sweet spot: light enough not to burden the context window, powerful enough to teach complex domain workflows.1.5The Skill-Based Browser Automation StackHere is the architecture we build throughout this book:1.6A Brief History: Who Invented This Pattern?The CLI-skill pattern -- a thin SKILL.md teaching an agent to drive a capable binary -- was pioneered in 2025 by Jason Huggins, the creator…1.7Why This Matters for Your CareerAI-driven testing is the most significant QA transformation since Selenium in 2004, and it is happening now:1.8Key Takeaways- Traditional automation is brittle because it operates on exact selectors, not intent - Agent skills teach agents domain-specific…1.9Q&ASelf-Assessment Quiz1. What fundamental limitation of traditional browser automation do agent skills address? 2. Do agent skills add new tools to the agent? If…1.10Exercises[Beginner] Exercise 1.1: Install Node.js (v24 LTS) and the Playwright CLI: npm install -g @playwright/cli@latest, then playwright-cli…1.11Career Translation- Adopted intent-driven AI agent automation to attack the 40-60% of QA time typically lost to test maintenance, replacing brittle…1.12Q&AInterview Depth CheckPrompt: Explain the difference between "intent" and "implementation" in browser test automation. Why does this distinction matter? A strong…