Auto-Connect: Connectivity-Preserving RigFormer with Direct Preference Optimization - Guo, jingfeng; Liu, Jian; Chen, Jinnan; Mao, Shiwei; Hu, Changrong; Jiang, Puhua; Yu, Junlin; Xu, Jing; Liu, Qi; Xu, LiXin; Chen, Zhuo; Guo, Chunchao (Advances in Neural Information Processing Systems, 2025)