arXiv Computation and Language By Zeyuan Zhao, Yuanyuan Shi, Peng Yu, Lingyue Fu, Shao Zhang, Ying Wen

Evolving Memory, Learning to Meta-Control: Test-Time Adaptation for Experience-augmented LLM Agents

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The paper introduces Online Meta-Control of Experience (OMCE), a framework that updates an agent’s experience memory and learns a meta-control policy during test-time adaptation. OMCE uses a lightweight contextual-bandit meta-controller to choose among four cognitive actions—DIRECT, EPISODE, GUIDE, and DISTILL—based on compact retrieval signals, thereby deciding when to invoke experience, which memory format to use, and when to consolidate new guidance. Experiments on four online adaptation benchmarks across four backbones show that OMCE can improve first-attempt success by up to 20.5 percentage points over the strongest baseline while reducing per-task token use by a factor of 5.7 to 62.5 relative to ACE with GPT‑5.2, and controlled ablations confirm the benefits of learned routing and ongoing policy adaptation.

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