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cs.LG2026

CB-Orchestrator: Adaptive Workflow Optimization for LLM Agents via Contextual Bandits

Jiahang Sun, Zhiwei Shang, Zhipiao Liu +4

Large Language Model (LLM) agents have demonstrated remarkable capabilities in tackling complex tasks through agentic workflows. However, manually designing these workflows is labo…

cs.LG2026

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

Zikun Qu, Min Zhang, Mingze Kong +5

On-policy distillation (OPD) provides dense teacher supervision on student-generated trajectories, but standard reverse-KL training can assign insufficient probability to other pla…

cs.LG2026

MASPOB: Bandit-Based Prompt Optimization for Multi-Agent Systems with Graph Neural Networks

Zhi Hong, Qian Zhang, Jiahang Sun +5

Large Language Models (LLMs) have achieved great success in many real-world applications, especially the one serving as the cognitive backbone of Multi-Agent Systems (MAS) to orche…

cs.LG2025

FedPOB: Sample-Efficient Federated Prompt Optimization via Bandits

Pingchen Lu, Zhi Hong, Zhiwei Shang +6

The performance of large language models (LLMs) is highly sensitive to the input prompt, making prompt optimization a critical task. However, real-world application is hindered by…

cs.LG2025

T-POP: Test-Time Personalization with Online Preference Feedback

Zikun Qu, Min Zhang, Mingze Kong +7

Personalizing large language models (LLMs) to individual user preferences is a critical step beyond generating generically helpful responses. However, current personalization metho…