Configuration - Claude Code Blog

How Claude Code decides whether to run a tool — the allow/deny rules in settings.json, the four permission modes, sandboxing on macOS, and the patterns that stop you from clicking Approve a hundred times a day.

Slash commands are the cheapest, fastest way to make Claude Code do exactly what your team does, the same way every time. Here is what they are, when to use them over a skill, and how to write ones people actually keep.

The statusline is the most-glanced-at piece of UI in Claude Code, and the one most users never customize. Here's what it shows, what you can put in it, and the configurations that actually save time.

Learn how to write an effective CLAUDE.md file to supercharge Claude Code in your projects. Covers structure, best practices, advanced patterns, and real-world examples for every tech stack.