Pan S, Tian Z, Yu W, Huang Z, Qiu Q, Chen Z, et al. WALKSAFE: Risk-aware Graph Random Walk with Bi-GRPO for LLM Safety. AAAI [Internet]. 2026 Mar. 14 [cited 2026 May 16];40(38):32655-63. Available from: https://ojs.aaai.org/index.php/AAAI/article/view/40543