STO-RL: Offline RL under Sparse Rewards via LLM-Guided Subgoal Temporal Order.

Chengyang Gu Yuxin Pan Hui Xiong Yize Chen STO-RL: Offline RL under Sparse Rewards via LLM-Guided Subgoal Temporal Order. 2026 January abs/2601.08107 CoRR https://doi.org/10.48550/arXiv.2601.08107 db/journals/corr/corr2601.html#abs-2601-08107 streams/journals/corr