@inproceedings{liu-etal-2026-token, title = "When Token Supervision Fails: Segment-Level On-Policy Distillation for Long-Horizon Agents", author = "Liu, Jialong and Li, Zuchao and Shi, Yuling and Zhang, Lefei and Qi, Baoyuan and Zhao, Hai", editor = "Zhang, Yue and Xu, Ruifeng and Purwarianti, Ayu and Rong, Tong and Suzuki, Jun", booktitle = "Proceedings of the 15th International Joint Conference on Natural Language Processing and the 5th Conference of the {A}sia-Pacific Chapter of the {A}ssociation for {C}omputational {L}inguistics (Volume 1: Long Papers)", month = nov, year = "2026", address = "Hengqin, China", publisher = "Association for Computational Linguistics", url = "https://aclanthology.org/2026.aacl-long.167/", pages = "3688--3725", ISBN = "979-8-89176-439-2" }