---
format: "aidr-story-markdown/v1"
id: "bc8c6fd043725d91cec98f54bcf1ece3f250798352b9b9cfbf40edd7709d7c4d"
canonical_url: "https://aidr.today/bc8c6fd0?lang=en"
title: "Google Open-Sources Harness2, a Recursive Agent Harnessing Framework"
lang: "en"
requested_lang: "en"
available_langs: ["en","vi"]
translation_fallback: null
fallback_fields: []
published_at: "2026-10-18T08:15:04.000Z"
category: "Open Source"
topics: ["google","agent","open-source","devtools"]
source_urls: ["https://www.marktechpost.com/2026/10/18/google-harness2-recursive-agent-harnessing-framework/","https://news.ycombinator.com/item?id=50151059","https://github.com/google-research/harness2"]
summary: "Google Research released Harness2, an Apache-2.0 framework that rewrites an agent's harness at test time. One refinement step lifted GLM-5 by 11.5 points on WorkBuddy-Bench with no weight updates."
---

# Google Open\-Sources Harness2, a Recursive Agent Harnessing Framework

> [Open the canonical story](<https://aidr.today/bc8c6fd0?lang=en>)

**Published:** 2026-10-18T08:15:04.000Z
**Category:** Open Source
**Topics:** google, agent, open\-source, devtools

## Summary

Google Research released Harness2, an Apache\-2\.0 framework that rewrites an agent's harness at test time\. One refinement step lifted GLM\-5 by 11\.5 points on WorkBuddy\-Bench with no weight updates\.

## Sources

- [Story source](<https://www.marktechpost.com/2026/10/18/google-harness2-recursive-agent-harnessing-framework/>)
- [Discussion](<https://news.ycombinator.com/item?id=50151059>)
- [Story source](<https://github.com/google-research/harness2>)