Agent Harness Optimization

Overview

Agent harness optimization studies how to improve the runtime systems around AI models—such as their instructions, tools, memory, context handling, verification, and task-control workflows—to make agents more effective and efficient. Common approaches use execution traces to diagnose failures and then apply iterative code or prompt edits, Bayesian or bandit search, evolutionary methods, reinforcement learning, or reusable modular components; some methods also optimize model weights alongside the harness. Work spans coding and terminal tasks such as SWE-bench and Terminal-Bench, interactive environments such as ALFWorld and WebShop, and embodied robotics. A central tension is that gains can depend on the model and task, or overfit to evaluation conditions, so matched-budget comparisons, held-out transfer tests, regression checks, and cost measurement are essential.

Latest papers

CardsList

185 papers65 papers in the last four weeks, up 103% on the four weeks before. 0.4% of all new papers.

  1. ClawGym II: Exploring Black-Box RL on Agent Harness

    Aug 17, 2026Huatong Song, Fei Bai, Ming Yang +17Reinforcement LearningRL for LLM Agents

  2. Zetta ζζ: An Efficient Closed-Loop Embodied Harness for Self-Evolving Physical Intelligence

    Aug 17, 2026Xin Ding, Liang Mi, Mingzhe Huang +12Embodied AISelf-Evolving Agents

  3. AutoDesign: Meta-Harness Optimization for Long-Horizon Agentic Design

    Aug 13, 2026Yaxin Luo, Haobin Jiang, Jialv Zou +11AI Coding AgentsAgent Harness Optimization

  4. Beyond Final Scores: A Systematic Evaluation of Agents for Long-Horizon AI Research and Development

    Aug 13, 2026Yiwei Li, Wanli Yang, Hexiang Tan +10Long-Horizon Agent EvaluationAgent Harness Optimization

  5. Recovering Wasted Compute in Autoresearch Agents

    Aug 11, 2026Au Kwok Chun, Abhigyan Acherjee, Amrutha Rao +4Inference-Time SearchAgent Harness Optimization

  6. SHE: Trajectory-driven Safety Harness Evolution for LLM Agents

    Aug 10, 2026Wanying Qu, Qinghua Mao, Yu Li +12Agent Harness OptimizationLLM Agent Safety

  7. Evo-Bench: Can Language Models Improve Agent Harness?

    Aug 10, 2026Lisheng Huang, Chen Yang, Hao Zhou +6AI Agent EvaluationLong-Horizon Agent Evaluation

  8. Ouroboros: A Self-Developing Frontier Coding Agent with Reviewed Core Evolution

    Aug 8, 2026Anton Razzhigaev, Andrei Gritsaev, Andrei Kaznacheev +3AI Coding AgentsAgent Harness Optimization

  9. EvoHarness-RL: Learning Runtime Harness Coordination for Self-Evolving Agents

    Aug 5, 2026Xuying Ning, Dongqi Fu, Tianxin Wei +17Agent Harness OptimizationLong-Horizon Agent Tasks

  10. EvolveNet: Collaborative Harness Evolution for Agent Self-Improvement

    Aug 5, 2026Jun Nie, Yonggang Zhang, Qianshu Cai +3Agent Harness OptimizationMulti-Agent Collaboration

  11. ADIAS: Automated Design of Interactive Agentic Systems

    Aug 3, 2026Lekang Jiang, Bohan Tang, Stephan Goetz +1Agent Harness OptimizationSelf-Improving Agents

  12. Harness-R1: Learning to Edit Executable Runtime Harnesses from Agent Failure Trajectories

    Aug 3, 2026Shuai Shao, Kangning Zhang, Qingyao Li +7Agent Harness OptimizationLLM Agent Self-Improvement

  13. HarnessCompass: Guiding Automatic Harness Evolution toward Generalizable and Effective Agent Harnesses

    Aug 3, 2026Luan Zhang, Ruochen Zhou, Dandan Song +9Agent Harness OptimizationLLM Agents

  14. Learning What to Remember and What to Internalize in LLM Self-Evolution via Adaptive Memory-Parameter Coordination

    Aug 2, 2026Tianyun Ji, Zhenya Huang, Jiayu Liu +3Continual Learning for LLM AgentsAgent Harness Optimization

  15. PATH-Bench: Path-Dependent Evaluation of Lifelong Agents

    Aug 2, 2026Xidong Yang, Xingyi Zhang, Wenhao Li +7Continual Learning for LLM AgentsLifelong Learning Agents

  16. RecHarness: A Bandit-Routed Agentic Harness for Self-Evolving Recommender Systems

    Jul 31, 2026Haoran Ling, Yuecheng Li, Zeyu Song +5Large Language Model-Guided OptimizationAgent Harness Optimization

  17. DarwinX: Evolving Agent Harnesses Through Natural Selection

    Jul 31, 2026Yifan Zhang, Yutong Dai, Juntao Tan +9Evolutionary OptimizationAgent Harness Optimization

  18. DREvo: Distilling Recalibrated Historical Experience for Harness Self-Evolution

    Jul 29, 2026Hanghui Guo, Weijie Shi, Zhangze Chen +6Agent Harness OptimizationLLM Agent Harnesses

  19. Living-Harness Is an Interactive-Agent Evolver

    Jul 29, 2026Yuetian Du, Yucheng Wang, He Xu +9AI Agent ReliabilityAgent Harness Optimization

  20. CHILL-Harness: Counterfactual Harness Learning for Efficient Reasoning in Long-Horizon Agents

    Jul 28, 2026Jiarun Fu, Lizhong Ding, Sida Chen +6Agent Harness OptimizationLong-Horizon LLM Agents