Knowledge Fusion of Large Language Models via Modular SkillPacks - DU, Guodong; Li, Zhuo; Zhou, Xuanning; Li, Junlin; Shi, Zesheng; LIN, Wanyu; Tang, Ho-Kin; Li, Xiucheng; Liu, Fangming; Wang, Wenya; Zhang, Min; Li, Jing (International Conference on Learning Representations, 2026)