5
AI-native companies run on it
AI 10 min read
Harness Engineering: The OS Behind 5 Companies
What 200+ AI Engineers Named the Thing I Already Run
In early 2026, engineers from OpenAI, Anthropic, IBM, and Google DeepMind independently described the same discipline: harness engineering — everything around the model that makes an agent reliable. I run five AI-native companies on it with zero hired employees. This is the teardown: the 5 artifacts, the principles, and why the harness is built to be deleted.
- What Is a Harness, and Why Is It the Whole Game?
- What Are the 5 Artifacts in My Harness?
- What Principles Did Every Lab Converge On?
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Guide Map
- 1 What Is a Harness, and Why Is It the Whole Game?
- 2 What Are the 5 Artifacts in My Harness?
- 3 What Principles Did Every Lab Converge On?
- 4 Why Is the Harness Built to Be Deleted?
- 5 Why Is This the Whole Game for Mid-Market?
- 6 What Would This Find in Your Company?
Also includes Table of Contents · Frequently Asked Questions
0
hired employees
200+
AI Engineer talks reviewed
7
labs that converged on it