Pan, Shilong, Zhiliang Tian, Wanlong Yu, Zhen Huang, Qingyu Qiu, Zihan Chen, Zhonghao Sun, Minlie Huang, and Dongsheng Li. “WALKSAFE: Risk-Aware Graph Random Walk With Bi-GRPO for LLM Safety”. Proceedings of the AAAI Conference on Artificial Intelligence 40, no. 38 (March 14, 2026): 32655–32663. Accessed May 16, 2026. https://ojs.aaai.org/index.php/AAAI/article/view/40543.