[ICDM, CCF-B] Nengjun Zhu, Xingyu Xi, Weihang Xu, Jian Cao, Shenghui Lan, Siji Zhu, and Xiaosong Chen, MedRuleAgents: A Rule-Space-Grounded Multi-Agent Collaboration Framework for Clinical Therapy Recommendation, Proceedings of the ICDM, 2026