arXiv AI By Yutong Song, Jiang Wu, Yuxuan Ren, Tony Qin, Baoyuan Wang

Hippo: Training-Free Agent Self-Evolution via Hippocampal Replay

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Hippo is a memory framework that enables large language model agents to improve without updating their parameters. It uses selective hippocampal encoding and replay to compare attempts at the same task, identify reusable decisions, and refine applicability conditions, thereby resolving conflicts and avoiding redundant entries. Experiments on SWE‑bench, WebArena, and Mind2Web demonstrate performance gains across models while retaining fewer experiences than a simple accumulation baseline.

Machine-generated by The Flow from the publisher's headline and feed description — not written or checked by a human. The full article lives at arXiv AI.

arXiv AI
Oct 21

More Memory, Worse Agents: Error Reproduction and Anti-Persistence in LLM Agents

The paper investigates how large language model (LLM) agents can improve performance by storing and reusing experience in external memory. It identifies a problem called error reproduction, where mistakes in stored abstractions propagate through cycles of abstraction, execution, and re-abstraction, leading to persistent errors. To mitigate this, the authors propose Anti-Persistence, a memory design that retains raw trajectories and outcomes but reconstructs task-specific guidance on demand, discarding it after use. Experiments across multiple benchmarks show that Anti-Persistence yields higher held‑out success rates and lower LLM‑call costs compared to other memory designs, supporting the idea of separating experience accumulation from abstraction persistence.

By Ruhan Wang, Kishan Panaganti, Dongruo Zhou
arXiv AI
Aug 14

MindMemOS: A Portable and Self-Evolving Memory Operating Layer for AI Agents

arXiv:2608. 12428v1 Announce Type: new Abstract: Memory is a core component of AI agents, enabling them to accumulate experience, maintain personalization, and adapt over long-term interactions.

By Kaichao Liang, Yuqi Cui, Hao Kong, Xinyuan Huang, Guohaotian Hou, Qingcan Kang, Liang Chen, Yiyang Yin, Ke Ye, Jiaquan Guo, Da Chen, Lingan Zeng, Yixing Peng, Rong Yao, Shixiong Kai, Mingxuan Yuan