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The original was posted on /r/opensource by /u/ResearcherFlimsy4431 on 2026-03-05 12:05:04+00:00.
Over 60% of clinics in sub-Saharan Africa have unreliable or no internet. Children miss vaccinations because records don’t follow them. Most EHR systems need a server and a stable connection which rules them out for thousands of facilities.
Open Nucleus stores clinical data as FHIR R4 JSON directly in Git repositories. Every clinic has a complete local copy. No internet required to operate. When connectivity exists — Wi-Fi, mesh network, it syncs using standard Git transport. The whole thing runs on a $75 Raspberry Pi.
Architecture:
- Go microservices for FHIR resource storage (Git + SQLite index)
- Flutter desktop app as the clinical interface (Pi / Linux ARM64)
- Blockchain anchoring (Hedera / IOTA) for tamper-proof data integrity
- Forgejo-based regional hub — a “GitHub for clinical data” where district health offices browse records across clinics
- AI surveillance agent using local LLMs to detect outbreak patterns
Why Git? Every write is a commit (free audit trail), offline-first is native, conflict resolution is solved, and cryptographic integrity is built in.
Looking for comments and feedback. Even architecture feedback is valuable.