What Is Agentic AI? A Beginner’s Guide to AI Agents in 2026

Agentic AI is transforming how we interact with technology. Instead of just answering questions, AI agents now take action, use tools, and complete complex tasks autonomously. This beginner-friendly guide explains what agentic AI is, how it works, the protocol stack powering it (MCP, A2A, AG-UI), and real-world examples like Claude Code, Devin, and NanoClaw.