Hierarchical Memory Orchestration for Personalized Persistent Agents

TL;DR

The paper introduces Hierarchical Memory Orchestration (HMO), a framework that organizes long-term interaction data into a multi-tiered hierarchy to improve efficiency and personalization in persistent agents.

Contribution

HMO is a novel memory management system that dynamically allocates interaction history based on user relevance, enhancing agent reasoning and scalability.

Findings

Achieves state-of-the-art performance on multiple benchmarks.

Significantly improves agent fluidity and personalization in real-world deployments.

Effectively manages extensive interaction data with reduced latency.

Abstract

While long-term memory is essential for intelligent agents to maintain consistent historical awareness, the accumulation of extensive interaction data often leads to performance bottlenecks. Naive storage expansion increases retrieval noise and computational latency, overwhelming the reasoning capacity of models deployed on constrained personal devices. To address this, we propose Hierarchical Memory Orchestration (HMO), a framework that organizes interaction history into a three-tiered directory driven by user-centric contextual relevance. Our system maintains a compact primary cache, coupling recent and pivotal memories with an evolving user profile to ensure agent reasoning remains aligned with individual behavioral traits. This primary cache is complemented by a high-priority secondary layer, both of which are managed within a global archive of the full interaction history. Crucially, the user persona dictates memory redistribution across this hierarchy, promoting records mapped to long-term patterns toward more active tiers while relegating less relevant information. This targeted orchestration surfaces historical knowledge precisely when needed while maintaining a lean and efficient active search space. Evaluations on multiple benchmarks achieve state-of-the-art performance. Real-world deployments in ecosystems like OpenClaw demonstrate that HMO significantly enhances agent fluidity and personalization.