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Claude Code is Anthropic’s official CLI tool that brings the power of Claude directly into your terminal. Tell it what you want to accomplish and it executes the steps: reading your codebase, editing files, running shell commands, creating commits, reviewing PRs, and more — all without leaving your workflow.

Quick Start

Install Claude Code and run your first command in under 5 minutes.

Installation

Detailed installation instructions for all platforms.

Core Concepts

Understand how Claude Code works: tools, permissions, and memory.

Command Reference

Every slash command with flags, examples, and behavior details.

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What Claude Code can do

Edit files

Read, write, and precisely edit any file in your codebase using string replacement.

Run shell commands

Execute bash commands, run tests, start servers — anything you’d do in a terminal.

Git workflows

Commit changes, review PRs, create branches, and view diffs through natural language.

Search your codebase

Use ripgrep-powered search and glob patterns to navigate large codebases instantly.

MCP integrations

Connect external tools and data sources via Model Context Protocol servers.

Multi-agent swarms

Spawn parallel sub-agents to tackle complex tasks concurrently.

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Get started

1

Install Claude Code

Install via npm using Bun or Node.js:
npm install -g @anthropic-ai/claude-code
2

Authenticate

Run Claude Code for the first time and follow the OAuth login prompt:
claude
3

Start coding

Open any project directory and describe what you want to do:
cd my-project
claude "Fix the failing tests in the auth module"
4

Explore commands

Inside the REPL, type /help to see all available slash commands, or /doctor to check your environment setup.
Claude Code requires an active Anthropic account. Run claude to start the REPL, then type /login to authenticate, or /doctor to diagnose any setup issues.

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