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Evo$^2$: Evolving the Evolver through Weight-Harness Co-Evolution

Self-evolving agents are increasingly used to improve language model systems without human intervention through either weight updates or harness improvements.

By Chejian Xu, Shujian Zhang, Wenxuan Zhou, John Lambert, Beck Chen, Bo Li, Andrew Hard, Rajiv MathewsarXiv - cs.CL (NLP)

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Originally published by arXiv - cs.CL (NLP) on Oct 12, 2026.

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