# Patrick Jiang's Harness-1 externalizes memory for a 20B search agent

> Source: <https://runtimewire.com/article/patrick-jiang-s-harness-1-externalizes-memory-for-a-20b-search-agent>
> Published: 2026-06-06 19:11:00+00:00

Patrick Jiang (@patpcj) introduced Harness 1, a 20B parameter search agent that moves search state outside the model and into a structured harness, according to a 13 post thread on X and the accompanying paper. The paper lists authors from the University of Illinois at Urbana Champaign, UC Berkeley and Chroma, and describes Harness 1 as a retrieval subagent trained with reinforcement learning inside a stateful search harness. The core claim is that search agents fail partly because they are a...