Author

Zhiwei Shang

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#artificial intelligence Preprint Oct 2026

MESH-Harness: Self-Improving Agent Harnesses via Bandit-Guided Compositional Evolution

An agent harness is the code that organizes context, maintains state, and coordinates tool calls for a language model. We study how to improve the harness under a limited evaluation budget while keeping model weights fixed. Our method, MESH-Harness, organizes each harness into functional modules with explicit role-spec...

Zhi-Wei Shang, Yun-Chen Huo, Ming-Rong Gong et al. · 0 citations

Preprint Sep 2026

CEO Arena: Evaluating Long-Horizon Multi-Agent Decision-Making in Competitive Markets

Long-horizon competition tests agents'ability to coordinate business decisions under uncertainty and adapt to changing rival strategies. We introduce CEO Arena, a benchmark that uses matched replacement evaluation to assess operating returns alongside an agent's effects on rivals and the market. Each CEO agent is compa...

An Yan, Yu-Jia Huo, Zhi-Wei Shang et al. · 0 citations

Preprint Aug 2026

SPOT: Sparse Probing and Outcome Calibration for On-Policy Distillation

Sparse Probing and Outcome-calibrated Targets OPD is introduced, which addresses two coupled decisions, where to probe and what to distill, through an acquisition--exploration--exploitation procedure and demonstrates the effectiveness of SPOT in improving reasoning performance while balancing solution quality and cover...

Zi-Kun Qu, Min Zhang, Ming-Ze Kong et al. · 8 citations