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Yifan Ding

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#artificial intelligence Preprint Sep 2026

AdaGuard: An Adaptive Guard Model with User-defined Policies

Guard models support the safe deployment of language model agents, but fixed risk taxonomies limit their ability to accommodate requirements that vary across applications and tasks. Under user-defined policies, detecting violations requires interpreting both the applicable rules and the agent's behavior, since identica...

Yun-Hao Feng, Yi-Fan Ding, Yu-Xiang Xie et al. · 0 citations
Jul 2026

SAF-OPD: Stable Advantage Fusion for On-Policy Distillation

SA is proposed, a Stable Advantage Fusion framework that avoids entropy collapse and consistently outperforms fixed-coefficient GRPO+OPD fusion, improving the aggregate score by 0.70% across all six model-domain settings while achieving more stable training.

Yifan Ding, Xin Wei, Yoshua Y. Li et al. · 3 citations

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