Lesson 0 — Introduction: Master Claude Code with a Pomodoro App

5 MIN READ | UPDATED: 2026-05-15

Welcome to the Claude Code Command Tutorial.

Instead of just listing commands like a dictionary, we believe in Learning by Doing. In this tutorial, you will build a real-world application: a Pomodoro Timer with a Todo List.

Why this project?

  • It involves UI (terminal or web).
  • It requires state management (timers).
  • It needs persistence (saving tasks).
  • it has clear milestones.

What you will master:

  • Project Setup: /init, /config
  • Architecting: /plan
  • Automated Coding: Subagents and tool execution
  • Advanced Workflows: /compact, /resume, /add-dir
  • Security: Permission modes and safe execution

By the end of this 12-chapter journey, you won't just know the commands—you'll know how to architect and orchestrate AI-driven software development.

Let's get started!