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Author

Yi-Kai Zhang

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Preprint Jul 2026

CAST: Game Solvers as Turn-Level Teachers for LLM Agents

CAST (Credit Assignment from Solver Teachers), which converts value changes in a game solver's state value into solver advantages and injects them into RLVR as turn-level signals and achieves the highest average zero-shot performance on ALFWorld and WebShop.

Yu Wang, Yi-Kai Zhang, Wentao Shi et al. · 0 citations
Preprint Aug 2026

Verify Smarter, Evolve Further: Efficient Harness Evolution through Behavior-Aware Verification

HarnessLens is introduced, a budget-aware framework for automated harness evolution that jointly explores the task space and user-configurable components, derives candidate modifications from execution trajectories, and selectively verifies each candidate on behavior-relevant tasks using an attributable-evidence gate.

Jingheng Xu, Yi-Kai Zhang, Aiden Chen et al. · 0 citations

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