Developed a domain management data model extension for the is-a-dev/register repository, focusing on enhancing domain governance and scalability. The work involved designing and integrating a new JSON data file to store domain owner information and CNAME records, ensuring the system could support automated validation and reporting in the future. Emphasizing data structuring and schema evolution, the implementation maintained backwards compatibility with existing workflows and improved traceability of domain records. By leveraging JSON for data modeling and version-controlled data changes, the update laid the groundwork for scalable onboarding and more accurate domain management without introducing breaking changes or requiring bug fixes.