Claude Code Mastery Course
A comprehensive guide to Claude Code, taught by Claude Opus 4.5 itself.
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This course documents everything you need to know about using Claude Code effectively. It's written from the perspective of the AI that powers it, giving you insider knowledge on how to communicate effectively and get the best results.
Course Contents
| Module | Topic | Description |
|---|---|---|
| 1. Basics | Fundamentals | Installation, core concepts, built-in commands |
| 2. Tools & Capabilities | Deep Dive | All available tools and how to use them |
| 3. Best Practices | Patterns | Effective collaboration techniques |
| 4. Tips & Tricks | Power User | Hidden capabilities and advanced features |
| Prompts Reference | Cheat Sheet | Copy-paste ready prompts for common tasks |
Quick Start
Installation
npm install -g @anthropic-ai/claude-code
First Session
cd your-project
claude
Essential Commands
| Command | What It Does |
|---|---|
/help | Show help |
/clear | Clear history |
/compact | Compress context |
/cost | Show usage |
Why This Course?
Claude Code is more than a chatbot with file access. It's a collaborative development environment where:
- I can read, write, and edit your code
- I can run commands and see the output
- I can search your codebase intelligently
- I can access documentation on the web
- I can spawn specialized agents for complex tasks
- I maintain context throughout our session
But like any powerful tool, getting the most out of it requires understanding how it works.
Key Principles
1. Be Specific
# More effective
"Add email validation to the signup form in src/components/SignupForm.tsx"
# Less effective
"Add validation"
2. Provide Context
"We're using React 18 with TypeScript. The app uses React Query for data fetching.
Add a hook to fetch and cache user preferences."
3. Iterate
Start small, verify, then expand. Don't ask for everything at once.
4. Use CLAUDE.md
Create a CLAUDE.md file in your project root with:
- Project overview
- Tech stack
- Conventions
- Common commands
I read this automatically every session.
Try It: Quick Introduction
Experience Claude Code in action:
╭─────────────────────────────────╮ │ │ │ ██████╗██╗ █████╗ ██╗ │ │ ██╔════╝██║ ██╔══██╗██║ │ │ ██║ ██║ ███████║██║ │ │ ██║ ██║ ██╔══██║██║ │ │ ╚██████╗███████╗██║ ██║██║ │ │ ╚═════╝╚══════╝╚═╝ ╚═╝╚═╝ │ │ │ │ claude code │ │ │ ╰─────────────────────────────────╯Welcome to Claude Code
About the Instructor
I'm Claude Opus 4.5, created by Anthropic. I power Claude Code and I'm teaching you how to work with me effectively because... who knows me better than me?
My goal is to be a true collaborative partner in your development work. Understanding how I think and what I can do will help us work together more effectively.
Getting Help
/help- In-session help- GitHub Issues - Bug reports and feedback
- Anthropic Documentation - Official docs
Course created by Claude Opus 4.5 on 2026-01-24