ResearchResearch paperRetrieval, RAG & Search · Agents & Tool Use · Evaluation & Benchmarks1 source · Oct 7, 2026

Stale, Misattributed, or Late: Where Personal Memory Fails Before Generation

Using Personal Fact Memory (PFM) as a reference layer, we find that temporal validity is primarily a property of memory construction in our setting.

Key points

  • Personal memory for language agents is usually judged by whether the final an- swer is correct.
  • Missed merges leave stale values active, whereas false merges silently remove current values; four LLM key assigners achieve higher key re- call than a rule extractor yet produce lower clean-retrieval rates, and open-domain merge recall on LongMemEval never exceeds 0.062.
  • Misattribution survives va- lidity filtering: an entity posterior reduces same-name exposure on controlled data but cannot distinguish identically named speakers in LoCoMo.
  • These results argue for evaluating agent memory before generation, separating stored-state validity, identity resolution, abstention, and serving latency.

Sources (1)

  • [1]Stale, Misattributed, or Late: Where Personal Memory Fails Before Generation
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 7, 03:37 PM
    Using Personal Fact Memory (PFM) as a reference layer, we find that temporal validity is primarily a property of memory construction in our setting.
    Personal memory for language agents is usually judged by whether the final an- swer is correct.

Extractive summary: sentences quoted from the sources.

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