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Jia-Jun Shi

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#natural language process... Preprint Sep 2026

HarnessDev: Can LLMs Create and Evolve Their Own Agent Harness?

It is found that generated harnesses remain substantially behind mature human-engineered references on code and on search and research, while matching or exceeding the selected references on writing and machine-learning experimentation, with large variation in execution cost.

Yu-Hao Wu, Jingyuan Zhang, Jia-Jun Shi et al. · 2 citations
#natural language process... Preprint Aug 2026

Aspire: Can Models Self-Evolve from Vague Goals?

This work introduces ASPIRE, a benchmark for vague-goal-driven self-evolution and shows that vague goals redirect search effort toward goal interpretation, and evaluates the resulting systems on a hidden, expert-authored set of 520 items spanning six goals.

Yu-Hao Wu, Jingyuan Zhang, Jia-Jun Shi et al. · 0 citations
#natural language process... Preprint Aug 2026

S3Gym: Can LLMs Turn Self-Testing and Self-Judging into Self-Improvement?

These findings show that recognizing successful actions is insufficient; agents must also transform feedback into executable and transferable policies, and provide a unified framework for diagnosing this process and identifying the bottlenecks that prevent agents from translating interaction experience into reliable self-improvement.

Jia-Jun Shi, Siyang Tao, Yu-Hao Wu et al. · 1 citation
#natural language process... Preprint Aug 2026

REER-PT: Reverse-Engineered Reasoning for Perplexity-Guided Pre-training Data Augmentation

Together, the perplexity analysis indicates improved continuation predictability, while the controlled pre-training experiments suggest that this augmentation can improve model performance without changing the standard pre-training objective.

Haoran Que, Jia-Jun Shi, Ting Huang et al. · 0 citations
#machine learning Preprint Jul 2026

LP-SFT: Local-Preserving Supervised Fine-Tuning via Multimodal Entropy Structure

LP-SFT, a Local-Preserving Supervised Fine-Tuning objective designed to explicitly protect this inherent entropy structure, improves overall performance over vanilla SFT and recent SFT-enhancement baselines, suggesting that local preservation helps mitigate capability degradation without collapsing sampling-accessible diversity.

Yueyang Wang, Baolong Bi, Shuo Lu et al. · 0 citations

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