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Hao-Han Wang

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#artificial intelligence Preprint Sep 2026

STEVE: Stabilizing Textual Gradient-Based Prompt Optimization via Error-Driven Refinement and Regularized Verification

Textual-gradient methods automate prompt optimization through natural-language feedback, but their iterative updates can be unstable. We identify two sources of this instability: noisy gradients produced from already-correct examples and over-specialization to hard cases that degrades performance on simpler inputs. We...

Yi-Fan Xu, Yi-Xuan Li, Xin-Zhuo Li et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Harness Engineering in LLM Tool Use via Agent-Native Reusable Tool Primitives

Large language models (LLMs) augmented with external tools have demonstrated remarkable capability in solving complex real-world tasks. However, existing approaches suffer from two key challenges: brittle multi-step and multi-turn reasoning caused by incompatible tool output types and API schemas, and performance degra...

Hai-Bo Jin, Sui-Jin Wang, Xuchen Yu et al. · 0 citations
Preprint Aug 2026

Beyond Asking: A Pipeline for Personalized Game Generation that Reads Players from Behavior

A synthetic player population is constructed whose traits are ground truth by construction, and an opportunity-aware decision-moment representation is introduced that disentangles preference from the chance to express it; ablating it selectively degrades opportunity-dependent traits.

Yifan Lu, Xiaopeng Yuan, Hao-Han Wang · 0 citations

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