Reference

Guides

Definitive, visualized reference guides on the systems behind modern AI search — written to be the resource people and answer engines cite.

Reference Guide · 16 min read

Graph Types for AI Agents

The six structures behind modern AI search — taxonomy, ontology, knowledge graph, information graph, context graph, vector / embedding index — what each one actually is, when to use which, and how they combine into GraphRAG. One dataset, six structures, visualized in 2D and 3D.

Knowledge GraphsVector DatabasesOntologyGraphRAGRAGRetrieval-Augmented Generation

Reference Guide · 22 min read

3D HVAC Troubleshooting

A complete residential split system — furnace, coil, ducts, refrigerant loop, condenser — modeled in 3D and wired to a fault ontology. Click parts to learn them; pick symptoms to diagnose them. 39 components, 22 symptoms, 35 faults across five system paths, real costs.

HVACAir ConditioningFurnaceTroubleshooting3D InteractiveHome Maintenance