Architecture AI Updates: July 2, 2026

1. A Three-Tier Agent Memory Architecture Modeled on Cognitive Science

InfoQ (Anthony Alford). Elastic open-sourced Atlas, an Elasticsearch-based memory system that splits agent memory into three types with distinct lifecycles: episodic memory for individual events that decay unless consolidated, semantic memory for durable facts linked to supporting evidence and superseded priors, and procedural memory stored as playbooks with success and failure counters that influence retrieval ranking. Each memory type gets its own index, and retrieval uses hybrid queries that combine BM25 lexical search, Jina v5 semantic search, reciprocal rank fusion, and cross-encoder reranking, with document-level security enforcing per-user isolation. The design’s core pattern is consolidation, automatically transforming raw episodic data into semantic facts and procedural strategies while keeping historical lineage, which lets agents scale context beyond the model window and reach 0.89 Recall@10 on question-answering tasks. Source