PaperAgent

Jun 5, 2026 · Artificial Intelligence

The Most Systematic 102‑Page Review of Agent Harnesses

This article provides a comprehensive overview of the "Code as Agent Harness" paradigm, detailing its three‑layer architecture, the roles of code in reasoning, acting, and environment modeling, the mechanisms that enable reliable long‑term execution, and how multi‑agent systems scale the harness through shared code and feedback loops.