Generic FHIR R4 resource store (JSONB) — any resourceType, upsert by (type, id)
HL7 v2.x ER7 engine: parser (segments → fields → components), ACK builder, MLLP transport
IntegrationEndpoint registry — 8 kinds: fhir, hl7v2, nphies, shafafiya, eclaimlink, dhamani, rcm, xds
Hashed API-key auth per endpoint (SHA-256; plaintext never stored)
IntegrationEvent append-only audit log for every exchange
Tokenized patient linking (subjectToken) — PDPL-safe, no PHI FKs