D Fetcher

Connects Claude to a real-time vitamin D synthesis calculator that accounts for solar position, UV index from TEMIS satellite feeds, skin type (Fitzpatrick scale), exposed body area, and age. Exposes operations to compute IU per minute, time to target dose, sunburn risk windows, and daily synthesis viability. The model uses NOAA solar geometry, scales linearly with UV index and body exposure, and anchors to published Holick's rule reference times. Useful when you need to advise on optimal sun exposure timing, generate personalized outdoor schedules, or answer health-related questions about vitamin D that require location-specific solar data rather than generic supplementation advice.