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LAYER 1 (Primary entities): Long-term memory for AI agents architecture diagram produced by Mohammed Shehu Ahmed at RankSquire.com showing the 2026 production accuracy gap of negative 32.4 percentage points between vendor benchmark scores and real-world production performance. Mem0 version 0.8.2 achieves 91.6 on LoCoMo benchmark but 49.0 percent effective accuracy after 30 days at 38 percent staleness rate. Sovereign TCO crossover threshold at 7,500 tasks per day where self-hosted Qdrant plus PostgreSQL stack at 3,870 dollars per month beats Mem0 Pro at 9,240 dollars per month. RankSquire Memory Fidelity Curve formula: Production Accuracy approximately equals Benchmark minus 0.22 times Staleness Rate minus 0.15 times log base 10 of Entities. EU AI Act Article 13 attestation requirement with zero major OSS frameworks providing cryptographic memory state proof as of May 2026. LAYER 2 (Relationships): The five-layer sovereign memory architecture connects extraction pipeline through episodic PostgreSQL storage to semantic Qdrant vector store through knowledge graph Neo4j temporal layer through the attestation proxy signing each retrieval with SHA-256 hash and RSA-2048 signature for EU AI Act Article 13 compliance. SVS Sovereign Viability Score comparison shows Qdrant plus PostgreSQL plus attestation at 9.2 out of 10 versus Mem0 OSS at 7.2 versus LangGraph at 7.8 versus Zep Graphiti at 5.4. LAYER 3 (What it proves): This production benchmark demonstrates that agent memory system selection in 2026 must be evaluated on production staleness degradation and EU compliance attestation requirements rather than vendor benchmark scores. The 18-month RankSquire production test across 50,000 sessions on DigitalOcean Frankfurt confirms the Memory Fidelity Curve degradation coefficients. May 2026. RankSquire.com.

Long-Term Memory for AI Agents: Production Architecture, Compliance,and Sovereignty

by Mohammed Shehu Ahmed

Quick Answer · Long-Term Memory for AI Agents (2026) Long-term memory for AI agents is the persistent, cross-session storage and ...

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