Browse from six countries, no signup
OpenLibreNet is another site we run. Pick a location and a real browser session opens in the tab - handy for checking geo-restricted pages or browsing without logging in anywhere. Free, nothing to install, and the session link is shareable so two people can browse it at once.
The Core Pattern
Every coding agent - Claude Code included - is this one loop:
while True:
response = model(messages, tools)
if response.stop_reason != "tool_use":
return response.text
results = execute(response.tool_calls)
messages.append(results)The model calls tools until it is done. Memory, tasks, teams, MCP - every one of the 20 lessons is a refinement around this loop.
The Build, Stage by Stage
Key Concepts
Agency comes from the model
An agent product = model + harness. The intelligence is trained into the model; your job is the plumbing around it, not the reasoning.
One loop is the whole engine
A while-True loop that calls tools until the model stops. Every mechanism in the course hangs off this single loop.
Add capability, never rewrite the loop
Each lesson registers a new mechanism - tools, memory, tasks, teams - around the same loop instead of changing it.
Source + English + runnable code
Every chapter ships a narrative README, English/Japanese translations, and a standalone code.py you can actually run.
Related Projects
Learn Claude Code - full 20-lesson course
Browse the complete curriculum, stage by stage.
Everything Claude Code (ECC)
A searchable index of a production agent harness - agents, skills, commands, rules.
shareAI-lab/learn-claude-code
The source repository - narrative chapters, translations, and runnable code.
