This repository is a comprehensive educational guide for Claude Code, an AI coding assistant by Anthropic. It provides copy-paste templates, Mermaid architecture diagrams, and progressive learning modules covering all Claude Code features: slash commands, memory, skills, subagents, MCP, hooks, plugins, checkpoints, advanced features, and CLI usage. The repo also includes production-ready build/validation scripts (EPUB builder, static site generator, link checker, Mermaid syntax checker), multi-language translations (Vietnamese, Japanese, Chinese, Ukrainian), CI/CD workflows, and a design system. It is not a software application itself but a knowledge base with supporting tooling. The architecture is a static documentation site with Python helper scripts and pre-commit hooks. Key entry points are the CLAUDE.md project overview and the numbered module directories (01-10). The repository is actively maintained with frequent updates tracking Claude Code releases.