Shipping an AI Agent that Lies to Production: Lessons Learned

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A detailed account of building and deploying an AI Mentor feature for a coding education platform. The team implemented an event-driven system using Go, Pub/Sub, and Server-Sent Events to help students debug their code. Key challenges included handling LLM hallucinations in production, implementing proper testing (evals),

28m read timeFrom threedots.tech
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Table of contents
Why AI Mentor?MilestonesThe “Help Me!” ButtonCalling LLMsPrompts & Context EngineeringFree-form chatSolving Complex ProjectsFixing the SolutionGo With The Domain Three Dots LabsQA: Tests & EvalsFailing on productionRAG and SourcesPredictabilityShifting the Mental ModelAgentic systems or autonomous agents?Where is the complexity?ModelsLimits & CostsObservability & ToolingModeratorEncouraging students to ask for helpThe UIOutcomes

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