What Is an Agent Harness? Build a Tiny One in TypeScript
This story is from 2026-09-30. It is preserved in the archive; the latest stories are on the live feed.
On September 9, I wrote that an AI agent is just a loop . And that the interesting part is everything we have to build around it. This month, that "everything" got a name almost everywhere I looked. The harness. On September 10, OpenAI launched the Agents API as a way to "build and run cloud agents…
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- 2026-09-30 10:41 · DEV Community — AI
What Is an Agent Harness? Build a Tiny One in TypeScript