Title:Learning User-Aware Recall: Personalized Retrieval in Long-Term Conversational Memory

Abstract:Long-term conversational agents are expected to remember past interactions, but memory is useful only when the right evidence is recalled for the right user. Existing memory-augmented LLM agents have made progress in building compact memory banks, yet retrieval is still often driven by query-centered similarity or fixed ranking rules, leaving user-conditioned relevance this http URL address this gap, we propose Profile-guided Personalized Retrieval Optimization (PPRO), a retrieval-centric framework that makes memory retrieval both user-aware and this http URL builds episodic and semantic memory banks from dialogue histories and derives a user profile from accumulated this http URL profile serves as an explicit personalized prior in memory ranking, allowing retrieval to account for stable user attributes, preferences, and this http URL further trains a query rewriter with Group Relative Policy Optimization, using both evidence retrieval quality and downstream answer quality as feedback while keeping the memory banks and answer model this http URL on LoCoMo and LongMemEval-S show consistent gains over training-free memory systems and training-based this http URL studies further show that both profile-guided ranking and retrieval-oriented rewriting contribute substantially to performance, highlighting retrieval optimization as a key factor in personalized long-term memory use.

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