During October 2025, Xhan developed a mock client and new API endpoints for Schema Registry associations within the confluentinc/confluent-kafka-go repository. This work enabled the creation, retrieval, and deletion of associations, incorporating comprehensive validation and lifecycle management to support robust testing workflows. Xhan updated dependencies and internal constants in the Schema Registry client to integrate these features, focusing on improving test coverage and reducing regression risk. The implementation leveraged Go and JSON, applying skills in API development, mocking, and testing. This contribution provided a foundation for more reliable association testing and streamlined validation processes across the codebase.