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arXiv 2026 · Preprint

MEMPROBE: Probing Long-Term Agent Memory via Hidden User-State Recovery

Enze Ma, Yufan Zhou, Wei-Chieh Huang, Jie Yang, Huanhuan Ma, Zixuan Wang, Chengze Li, Chunyu Miao, Philip S. Yu, Zhen Wang

Overview

MemAudit evaluates long-term agent memory as an artifact that can be inspected after an interaction. Agents assist simulated users, then a separate recovery step reconstructs hidden user attributes from the stored memory. The benchmark includes 50 users, 31 hidden dimensions per user, and five memory systems, with both full-store and retrieval-limited access.

The results distinguish successful task completion from faithful user-state retention: an agent can finish its tasks while retaining only a partial understanding of the user. This provides a direct evaluation target for more reliable personalized agents.

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