HyperGraphMind is the reasoning layer for enterprise AI agents — the layer above context. Every AI decision is reasoned over a knowledge graph, proved with SHA-256 chains, and governed by symbolic rules (RETE/Datalog). Unlike RAG pipelines and context layers, HyperGraphMind performs inductive graph reasoning on unseen entities without retraining. 882ns on-device lookups. 82.1% MRR. 2.78µs p99 queries. Federated SQL+SPARQL+vector across Snowflake, Databricks, BigQuery. Open standards (RDF, OWL