How to Make Claude Write Valid Synthea Modules

Synthea has 85 disease modules. Each one is a JSON state machine that generates encounters, conditions, labs, medications, and procedures for a specific disease. If you need a condition Synthea doesn't cover — celiac disease, migraine, GERD, whatever — you author a new module. The module format is learnable. The hard part is the medical codes. Every module embeds SNOMED codes for conditions, LOINC codes for labs, and RxNorm codes for medications. Ask an LLM to write a celiac disease module and i