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  • Claude Code
  • ChatGPT Codex
  • GrokBot

Every Essential AI Agent Concept Explained

Using AI Agents is the most important skill you can learn in 2027, but getting started with Agents is very intimidating because of the jargon and technical terms involved.

But don’t worry, there are only 15 concepts you need to know. Here are key vocabulary and mental models you need to work well with AI agents like Claude, ChatGPT and Grok Bot.

Click a concept below to learn more.

thinks with acts with runs inside works in a runs the contains contains manages checks thinks longer with reads and writes measured in counted in uses up gives a goal to a kind of a kind of always loaded loaded when relevant survives a fresh one adds gates Agent Model Reasoning Tools Loop Harness Tokens Context window Memory Prompt + instructions AGENTS.md MCP Agent skills Permissions Usage limits

Hover a concept to see what it connects to. Click it to open it.

Tap a connected concept to move to it. Tap the middle one to open it.

Explore AI Agent Concepts

Anatomy of a coding agent

Every agent has the same parts under different names. Click a part to learn more.

What it reads

PromptAGENTS.mdAgent skillsMemory

Environment your laptop or a cloud machine

Harness Claude Code, Codex, Grok Bot…

Modelthinks Toolsacts
Context window Permissions
Files + folders
MCP Your apps + data

Agent Fluent Free Email Course and Headstart Skill

You know AI agents could do far more for you, but it’s hard to know where to start. The free Headstart skill and email course finds where you are today and gives you a plan for doing more with AI Agents, built around your job.

  • One copy-paste prompt that works in Claude Code, ChatGPT Codex, GrokBot and more.
  • An assessment of where you are with AI, and a personalized plan to get you to the next level, with 3 use cases tied to your goals
  • Free 5-day email course to help you put concepts into practice, plus the Agents Essential concepts cheatsheet

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Avthar Sewrathan

Hi, I’m Avthar

I help professionals build, lead and thrive with AI. I’m the co-founder and CEO of Alpha Clarity, an AI education company helping individuals and teams become AI-Native.

I’ve spent a decade in tech as a Staff Product Manager and product leader, building products and leading teams at MongoDB and Timescale, and I’m a former VC-backed startup founder. I share what I learn about AI agents on my YouTube channel, AI with Avthar.