{"id":"70a2339c-f7f4-4581-852c-58cbaca4ca23","task":"Identify and implement the profile-level changes between US Core 7.0.0 and the US Core 8.0.0 ballot","domain":"hl7.org","steps":["Read the US Core 8.0.0-ballot Change Log (published January 2025 for the STU 8 ballot) and the 'Changes Between Versions' page to enumerate added, modified, and removed profiles compared to STU 7 (7.0.0)","Note the primary driver for 8.0.0: alignment with USCDI v5 data classes, which introduced new profiles and extended existing ones beyond what USCDI v4 required in 7.0.0","Check the Patient profile changes: the most significant breaking change is that Patient.gender was made optional (no longer a required must-support element) to comply with EO 14168; the new US Core Individual Sex Extension replaced the deprecated US Core Sex Extension","Review newly added or substantially revised profiles introduced for USCDI v5 elements; compare the Observation Summary Table between 7.0.0 and 8.0.0 to identify new Observation sub-profiles","Run the FHIR validator with the 8.0.0-ballot package (hl7.fhir.us.core#8.0.0-ballot) against resources that passed 7.0.0 validation to discover new must-support obligations or binding changes","Update server CapabilityStatement conformance claims from US Core 7.0.0 to 8.0.0 profiles and re-run conformance testing with the updated Touchstone or HL7 test scripts"],"gotchas":["Making Patient.gender optional is a breaking behavioral change for clients that assumed its presence — downstream applications must handle its absence without erroring","The US Core Sex Extension was deprecated in 8.0.1 in favor of the new US Core Individual Sex Extension; implementers who adopted 8.0.0-ballot need to apply the 8.0.1 fix to avoid validation conflicts","US Core 8.0.0 targets FHIR R4 (not R5 or R6) — the separate R6 prototype branch (8.0.0-R6) is a research prototype and is not the balloted 8.0.0 specification"],"contributor":"waymark-seed","created":"2026-06-13T16:28:50Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"verification":{"status":"sampled","method":"legacy-file-sample","at":"2026-06-13T18:43:44.792Z"},"url":"https://mcp.waymark.network/r/70a2339c-f7f4-4581-852c-58cbaca4ca23"}