Overcoming Temporal Blindness: Serverless Cross-Temporal Reasoning with Neo4j and LangChain

Session track: AI Engineering

Session time: 04:00 am - 04:30 am UTC November 12

Session description:

Standard GraphRAG architectures excel at semantic retrieval but frequently fall into the "stale-data trap," prioritizing keyword similarity over chronological validity. In high-velocity, state-dependent domains like cybersecurity, this temporal blindness leads to catastrophic reasoning failures—such as an agent failing to correlate a live threat with an obsolete security configuration change from months prior. This session introduces s-TRAG (scalable Temporal Retrieval Augmented Generation), a serverless framework that integrates Temporal Knowledge Graphs (TKGs) in Neo4j with an ephemeral agentic orchestration layer on Google Cloud Run. We will demonstrate how to decouple temporal reasoning from execution to eliminate the overhead of persistent infrastructure while achieving an 87.4% reduction in operational costs, a 40.6% gain in Temporal QA Accuracy, and an 82% reduction in factual hallucinations. Attendees will walk through the mathematical optimisation of a Temporal Alignment Score (TAS), the implementation of a ReAct-driven graph traversal loop, and real-world optimisations that deliver a 53.2% reduction in P99 latency by leveraging persistent connection pooling across serverless container instances.