Layered technical illustration of agent infrastructure beyond the protocol layer, including orchestration, policy, durability, observability, and operator controls

What Comes After MCP: The Next Layer of Agent Infrastructure

The live demo repo for this series is 67ailab/harness-engineering. For this final post, I did not change the repo before publishing; the codebase discussed here is the current public state at commit 7d01dae, the same commit introduced in the previous post when the repo gained a real blueprint export. That matters because this article is not about an imaginary next step. It is about what the current repo already makes obvious once you stop looking at MCP as the finish line. ...

May 13, 2026 · 67 AI Lab
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