ResearchResearch paperLarge Language Models · Efficiency & Inference · Speech & Audio1 source · Oct 21, 2026

PreCoMem: Predictive Cognitive Memory for Self-Evolving Long-Term Dialogue Agents

We introduce PreCoMem, a memory consolidation framework inspired by predictive coding that represents memory as confidence-weighted beliefs about the user's state.

Key points

  • Long-horizon dialogue agents need to keep user memories stable enough for personalization while adapting when the user genuinely changes.
  • Existing memory systems often append every observation or overwrite old entries by heuristic rules, which makes transient noise hard to distinguish from real belief drift.
  • According to effective surprisal, a two-threshold gate maps each turn to one of three deterministic updates: MAINTAIN reinforces supported beliefs, PROFILE stores ambiguous cues as low-confidence hypotheses, and CORRECT softly decays reliably contradicted facts.
  • Experiments on LoCoMo, LongMemEval-S, and PersonaMem-v2 show consistent state-of-the-art accuracy; our new DiMoBench confirms that PreCoMem adapts to non-stationary belief drift without over-reacting to noise.

Sources (1)

  • [1]PreCoMem: Predictive Cognitive Memory for Self-Evolving Long-Term Dialogue Agents
    arXiv (AI, ML, NLP, CV, robotics, multi-agent) · Oct 21, 09:21 AM
    We introduce PreCoMem, a memory consolidation framework inspired by predictive coding that represents memory as confidence-weighted beliefs about the user's state.
    Long-horizon dialogue agents need to keep user memories stable enough for personalization while adapting when the user genuinely changes.

Extractive summary: sentences quoted from the sources.

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