Layered technical diagram of an agent harness with CLI, runner, policy, tools, tracing, memory, workflow, approval gate, and persisted artifacts

A Reference Blueprint for a Production Agent Harness

The live demo repo for this series is 67ailab/harness-engineering, and for this post I did change the repo before publishing. The new repo commit is 7d01dae, which adds a real blueprint export to the demo so the architecture in this article is not just a hand-drawn diagram in prose. You can now run: PYTHONPATH=src python3 -m harness_engineering.cli blueprint --pretty PYTHONPATH=src python3 -m harness_engineering.cli blueprint --format markdown PYTHONPATH=src python3 -m harness_engineering.cli blueprint --format mermaid That feature lives mainly in: ...

May 12, 2026 · 67 AI Lab