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Hexo Labs Open-Sources SIA: A Self-Improving Agent That Updates Both the Harness and the Model Weights

Hexo Labs Open-Sources SIA: A Self-Improving Agent That Updates Both the Harness and the Model Weights

Hexo Labs has open-sourced SIA, a self-improving agent framework licensed under MIT. The system uses a Feedback-Agent to analyze execution trajectories and either rewrite the agent scaffold or apply LoRA weight updates to the gpt-oss-120b model. Evaluations show that combining both adaptation methods outperforms scaffo

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