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COBRA-Skills: Contextual Bandit-Guided Evolution for Agent Skill Optimization

Research LLM Agents

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Overall 87
Content 95
Popularity 67

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Representative image for COBRA-Skills: Contextual Bandit-Guided Evolution for Agent Skill Optimization

Merged summary

TL;DR - COBRA-Skills optimizes reusable LLM-agent skills by combining contextual-bandit prioritization with execution-feedback-driven skill evolution. It reports leading average performance across multiple benchmarks while cutting optimization costs and data requirements.

  • Treats skill optimization as budgeted sequential optimization over a dynamically evolving candidate pool.
  • Selectively evaluates promising or informative skills rather than exhaustively testing candidates.
  • Across six agent benchmarks and three target models, it achieves the strongest average performance among compared methods.
  • Reduces optimization cost by 55–58% versus SkillOpt while using 50 unique optimization examples per benchmark.

Sources (1)

COBRA-Skills: Contextual Bandit-Guided Evolution for Agent Skill Optimization

arXiv cs.AI Pingchen Lu, Xiangyi Wang, Xiang Li, Jie Mao, Zikun Qu, Junfeng Luo, Yao Shu, Bryan Kian Hsiang Low, Zhongxiang Dai 2026-09-10 arXiv:2609.11682
Public signals Hugging Face upvotes 46
Providers: Hugging Face · Upvotes 46 OpenAlex · N/A Publisher · N/A Semantic Scholar · N/A X · N/A Fetched 2026-09-25 14:21:03.844628 UTC

TL;DR - COBRA-Skills optimizes reusable LLM-agent skills by combining contextual-bandit prioritization with execution-feedback-driven skill evolution. It reports leading average performance across multiple benchmarks while cutting optimization costs and data requirements.

  • Treats skill optimization as budgeted sequential optimization over a dynamically evolving candidate pool.
  • Selectively evaluates promising or informative skills rather than exhaustively testing candidates.
  • Across six agent benchmarks and three target models, it achieves the strongest average performance among compared methods.
  • Reduces optimization cost by 55–58% versus SkillOpt while using 50 unique optimization examples per benchmark.
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