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Xuansheng Wu

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#artificial intelligence Preprint Sep 2026

Less Sycophancy, Stronger Refusal? Lessons for AI Safety from Mechanistic Interpretability

Reliable refusal of harmful requests is essential to the safe deployment of language models. Because excessive eagerness to please users may undermine existing refusal capabilities, reducing sycophancy offers a potential route to stronger refusal beyond the harmful scenarios covered by safety training. We investigate t...

Xu Wang, Di-Fan Zou, Xuan-Sheng Wu · 0 citations
Jul 2026

Agent Skills Matter: Inferring Proprietary Skills from Execution Trajectories

These results show that benign execution trajectories can expose proprietary procedural knowledge, and SigLeak, a black-box framework that exploits recurring skill signatures in agent behavior, outperforms or matches three baselines in nearly every setting.

Jianing Geng, Ruiqi He, Zekun Fei et al. · 3 citations

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