A Type 1 diabetic software engineer created GlycemicGPT after experiencing months without endocrinologist oversight of his diabetes data. The open-source platform connects CGMs and insulin pumps to AI analysis running on personal infrastructure, supporting Dexcom G7 and Tandem pumps via direct Bluetooth connectivity.

Built with a bring-your-own-AI architecture, the system works with local models like Ollama or commercial providers including Claude and OpenAI. It processes data from Nightscout instances and provides pattern recognition, meal analysis, and configurable alerts with caregiver escalation. The Docker-based deployment keeps data local with no subscriptions.

Safety remains paramount - GlycemicGPT cannot control medical devices and includes disclaimers about not replacing professional care. The project invites developer contributions, especially for BLE and Android improvements. This represents a growing trend of patient-built tools filling gaps in commercial diabetes management ecosystems.