Worked on evolving the API surface for the Backbase/stream-services repository by introducing new data group types to the stream-legal-entity OpenAPI specification. This involved updating the openapi.yaml and changelog files using YAML and Markdown, ensuring that the API documentation accurately reflected the expanded data governance capabilities. After a previous revert, the changes were carefully reintroduced to stabilize the API and maintain intended functionality. Additionally, the compatibility matrix in the README was updated to align with newer versions of Stream and Banking Services, as well as Java and Spring Boot, reducing integration risk and improving release readiness through comprehensive documentation.