Author

Yifei Li

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Preprint Aug 2026

Beyond Retrieval: Query-Conditioned Reuse of Long-Horizon Agent Trajectories

An evaluation framework that holds candidate retrieval, target state, model, decoding, and tool budget fixed while varying the support delivered to the agent is formulated, separating retrieval quality from the problem of turning retrieved experience into safe, useful support for a new task.

Yifei Li, Heng Wang, Lingling Zhang et al. · 0 citations

#natural language process... Preprint Sep 2026

From Rollouts to Recipes: Self-Contained Post-Training for LLMs

Self-Routing is proposed, a behavior-conditioned post-training framework that uses rollout correctness and confidence to decide how each sample should be optimized, allowing training to adapt without external teachers, extra annotations, or additional sampling.

Yifei Li, Lingling Zhang, Mu-Ye Huang et al. · 0 citations

#artificial intelligence Preprint Aug 2026

Self-Specialized Teachers for Domain Post-Training

Self-specialized teacher distillation (SSTD), a two-stage procedure that first trains a copy of the base model into a domain teacher, then distills its token distribution to a student on prefixes sampled from the student itself, is proposed.

Yifei Li, Rong-Man Xu, Lingling Zhang et al. · 1 citation

Preprint Aug 2026

QUMem: Personalized Memory for Query-Conditioned User-State Inference in LLM Agents

A structured memory framework for query-conditioned user-state inference for long-term personalization that achieves state-of-the-art performance on both PersonaMem and KnowU-Bench, demonstrating the effectiveness of query-conditioned user-state inference for long-term personalization.

Heng Wang, Yifei Li, Lingling Zhang et al. · 0 citations