Developer Publishes SIL-3-Grade Open-Source Insulin Control Loop Simulation for T1D

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Software architect Omer Giladi has published a Python-based simulation of a closed-loop insulin delivery system designed for Type 1 Diabetes management, built on what he calls a '4-Brains Cybernetic Architecture' combined with Fibonacci-derived constants. The project, released under a 2026 copyright, is classified as a mission-critical, SIL-3 medical-grade concept and is not a production medical device. Security features include HMAC-SHA256 cryptographic validation of incoming glucose sensor data, temporal drift checks to block replay attacks, and a biological accumulation guard intended to detect synthetic or spoofed data streams. Hard-coded physiological dose limits — including a maximum single correction dose and a 24-hour total dose cap — are designed to remain non-bypassable by the algorithm. The codebase is implemented using FastAPI and is publicly shared on DEV Community as a research and architectural reference.

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