@mylifcc: Want to truly understand how Claude Code works, not just stay at the prompt level? This repo is extremely hardcore: shareAI-lab/learn-claude-code "Bash is all you need"—— from 0 to…
Summary
Introduces an open-source learning project that implements a Claude Code-like agent harness from scratch, covering 20 lessons that gradually add core mechanisms, along with runnable code and documentation.
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Want to truly understand how Claude Code works, not just at the prompt level?
This repo is hardcore:
shareAI-lab/learn-claude-code
“Bash is all you need” — Build a nano Claude Code-like “agent harness” from scratch.
20 lessons, each adding one core mechanism:
s01 Pure Bash tool
s06 Sub-agent + fresh context
s08 Context compaction
s12 Disk task graph
s15 Agent teams + mailbox
s19 MCP plugin
… up to s20 full comprehensive version
Each lesson includes directly runnable code.py + README in Chinese/English/Japanese + architecture diagrams.
Core idea in one sentence: “Agency comes from the model; the harness is the foundation.”
This is true Harness Engineering.
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