Tech Minimalism

Apr 8, 2026 · Artificial Intelligence

From One LLM Call to Working Code: Inside Claude Code’s Agent Harness

This article dissects Claude Code’s open‑source leak, walking through each stage from user input to the agent delivering executable code, revealing how a single LLM invocation is wrapped by a meticulously engineered Agent Harness that manages context, tool permissions, concurrency, planning, and error recovery.