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Xin-Yu Che

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Preprint Oct 2026

From Code to Playable Systems: CEGame-Bench for Long-Horizon Game Creation Agents

A game ships when a player can launch it, finish it, and return to a saved world, none of which a successful build guarantees, yet game-creation agents are mostly tested on one engine or on one-prompt browser games. We present CEGame-Bench, the first long-horizon benchmark for complete-game creation across five product...

Zi-Xuan Dong, Yang-Hai Wang, Han-Yan Bian et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Does Learning to Predict the World Help Agents Act? Auditing World-Model Post-Training

This work replaces true next-observation targets with in-distribution mismatched observations and introduces a setting that replaces prediction-based rewards with independent random signals, which expands task coverage even when the reward carries no environment information.

Xin-Yu Che, Hang Yan, Yan-Chen Liu et al. · 0 citations
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

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