@inproceedings{cai-etal-2026-coevoloop, title = "{C}o{E}vo{L}oop: Closed-Loop {RL} Training of Customer-Service Agents by Co-Evolving Environment, Reward, and Policy", author = "Cai, Hui and Chen, Jianda and Zhou, Yuhong and Ren, Wei and Marcus, Choy Zhen Wen and Faith, Tan Li Hui and Xue, Lyuxin and Chen, Hao and Luo, Jiawei and Hu, Xuanwei and Zhang, Xin", editor = "Agrawal, Sweta and Abad, Alberto", booktitle = "Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing: System Demonstrations", month = oct, year = "2026", address = "Budapest, Hungary", publisher = "Association for Computational Linguistics", url = "https://aclanthology.org/2026.emnlp-demos.24/", pages = "242--252", ISBN = "979-8-89176-461-3" }