Claude Code Ultimate Guide

Claude Code Ultimate Guide

      Florian BRUNIAUX · Fractional Chief AI Officer
      13 years from developer to CTO / VP Eng · Blog ↗ · Projects ↗

Learn Claude Code, build reliable agents, and scale their use safely. The website is the primary reading and discovery interface. This repository contains the canonical Markdown sources, reusable files, machine-readable indexes, and contribution history.

Start here: complete a first task online · browse the guide portal · open the complete sitemap · read the Markdown source

Choose your next step

The table below is generated from machine-readable/navigation.json. The same contract feeds the public sitemap, so the repository and website expose the same intent model.

Why this guide exists

Claude Code documentation explains the product. This guide connects product behavior to engineering decisions: what belongs in context, when to use an agent instead of a skill, how to verify generated work, and which controls matter when usage moves beyond one developer.

The guide favors explicit trade-offs and verifiable procedures. Where evidence is incomplete, the relevant page should preserve that limit instead of presenting one workflow as universal.

Start

Install Claude Code

Anthropic recommends the native installer, which updates itself:

Alternatives that do not auto-update: brew install --cask claude-code, winget install Anthropic.ClaudeCode, or npm install -g @anthropic-ai/claude-code (Node.js 22+). See the official setup page.

Verify the installation and authenticate:

The Quick Start chapter documents installation alternatives, authentication, updates, permission modes, and common first-day failures.

Complete a first task

Open a small repository with a clean or understood Git state,…