Honda Advisor Built a Multilingual AI SMS Agent Before Reading the Textbook

A Honda service advisor in South Florida built a production AI agent to handle repetitive customer queries via SMS, including appointment booking, service contract checks, and owner's manual lookups across six languages. The system routes complex cases to the advisor via Telegram and has been live with real customers for several months. After building it through trial and error, the advisor read Chip Huyen's AI Engineering and found formal names for patterns already used in the system. Key lessons emerged from three production bugs, all sharing a common shape: date comparisons, price calculations, and form validation were moved from the AI model into Python code. The core principle the advisor distilled is that any claim a model makes which code can verify, code should verify — improving reliability and reducing testing costs.