Architect Practice

Apr 12, 2026 · Artificial Intelligence

What Engineering Problems Does Claude Code’s Harness Engineering Solve?

The article dissects Claude Code’s open‑source TypeScript implementation to reveal the five‑layer Harness Engineering architecture—Query Loop, system‑prompt assembly, tool orchestration, multi‑level context compression, and multi‑Agent coordination—showing how each layer solves concrete engineering challenges for reliable AI agents.