Understand the architecture
Follow 17 guided chapters from startup to the agent loop, tools, permissions, memory, and context management.
17 bilingual chapters · 15 Python labs
Claude Code Internals
Follow a prompt all the way to tool execution. Combine source walkthroughs with runnable Python labs to understand the agent loop, tools, permissions, memory, and multi-agent collaboration.
No API key needed in Mock mode · Independent learning project based on a fixed source snapshot
Build your first agent
Start with a minimal loop, then add tools and streaming chat through three hands-on tutorials.
Explore working experiments
Run 15 Python labs to see the designs in action. Start in Mock mode with no API key.
Look up and connect ideas
Find implementation clues with source maps, pattern cheatsheets, architecture diagrams, and a glossary.