What is Claude Code?
An AI assistant that lives in your terminal, works directly with your files, and helps you get things done faster — no programming experience required.
The big idea
Claude Code is an AI coding assistant built by Anthropic that runs entirely inside your terminal. Unlike chat-based AI tools that live in a browser tab, Claude Code sits right next to your files. It can read them, edit them, run commands, search through folders, and even execute multi-step tasks — all through plain-English conversation.
Think of it as a highly capable colleague who can see your entire project, understands the context of what you are working on, and can take action on your behalf. You describe what you want in natural language, and Claude Code figures out the steps, executes them, and shows you the results.
Who this guide is for
The Keyset Guide is designed for a broad audience. You might be:
- A complete beginner who has never opened a terminal before and wants to understand what all the excitement is about.
- A knowledge worker — marketer, PM, analyst, writer — looking for a way to automate repetitive tasks, organize files, or generate content faster.
- A designer or creator who wants to scaffold projects, batch-process assets, or prototype ideas without writing code from scratch.
- A developer who wants to go beyond simple code completion and learn how to build autonomous agents and reusable skills.
No matter where you start, the guide takes you on the same path — from installation all the way to building custom agents that run your workflows on autopilot.
How it's different from ChatGPT and other AI tools
You may have used ChatGPT, Gemini, or other AI chat interfaces before. Those tools are great for answering questions, but they have a fundamental limitation: they can't touch your files. Every time you want the AI to work on something real, you have to copy-paste text back and forth, manually apply suggested changes, and lose context between conversations.
Claude Code eliminates that friction. Here is a quick comparison:
| Feature | Browser AI chat | Claude Code |
|---|---|---|
| File access | Upload one at a time | Reads your entire project at once |
| Editing files | Copy-paste suggestions manually | Edits files directly on disk |
| Running commands | Cannot run anything | Runs terminal commands for you |
| Context | Resets every conversation | Remembers project context via CLAUDE.md |
| Automation | One question at a time | Multi-step tasks and autonomous agents |
The key takeaway: Claude Code is not just a smarter chatbot. It is a tool that can do things on your computer — read files, write files, search, organize, refactor, deploy — all guided by your plain-English instructions.
What you'll learn in this guide
The Keyset Guide is organized into four modules that build on each other:
Install Claude Code, launch your first session, and see results in under five minutes. You are here now.
Navigate your workspace, work with files, master commands and shortcuts, set up project memory, and run parallel agents.
Turn your manual workflows into reusable skills, build custom agents, and follow real-world playbooks across domains.
Reference material including a cowork guide for delegation-style workflows and a quick-reference cheat sheet.
Key concepts to know upfront
Before we dive in, here are a few terms you will encounter throughout the guide:
- Terminal — The text-based interface on your computer where you type commands. On macOS it is called Terminal or iTerm; on Windows it is called PowerShell or Windows Terminal. Think of it as a text message conversation with your computer.
- CLI (Command-Line Interface) — Any tool you interact with by typing commands rather than clicking buttons. Claude Code is a CLI tool.
- Project / Repository — A folder on your computer that contains the files you want to work with. It could be a codebase, a collection of documents, a website, or anything else.
- CLAUDE.md — A special file that gives Claude Code persistent memory about your project. You will learn all about this in Module 1.
Ready to start?
In the next lesson, we will walk through installing Claude Code on your machine step by step. The whole process takes about five minutes. Click “Next” below to continue.