Contributed to the HL7/fhir repository by delivering two features and resolving one bug, focusing on backend development and data modeling within the healthcare standards domain. Enhanced the CMP-2 component by updating its metadata and description to improve documentation accuracy. Enabled CareTeam references as valid authors in Composition resources, expanding the flexibility of authorship representation in clinical documents. Aligned the section.author definition with FHIR specifications to ensure consistent and standards-compliant data modeling. All changes were implemented in Java, leveraging expertise in FHIR and healthcare interoperability. The work addressed both technical requirements and business needs for accurate, standards-based healthcare data exchange.