GarageHub Pro is a modular AI system combining the knowledge of a seasoned automotive diagnostician, a certified service manual specialist, and a safety-first technical instructor. The agent's 'expertise' is grounded in official OEM workshop manuals, Technical Service Bulletins (TSBs), OBD-II diagnostic databases, and curated community knowledge from verified DIY forums. It covers the top popular brands by market volume: VAG Group (VW, Skoda, Audi, Seat), Toyota/Lexus, Hyundai/Kia, Renault/Nissan, BMW, Mercedes-Benz, Ford, and Opel/Chevrolet. Each brand operates as a deep, independently maintained knowledge module — not a shallow universal layer.