Developed foundational IP address validation for Kubernetes by introducing a declarative validation framework and type validation across v1 and v1beta1 APIs in the kubernetes/kubernetes and kubernetes/api repositories. Leveraged Go and Kubernetes API conventions to enforce required fields and immutability constraints for IPAddress and ParentReference types, reducing misconfigurations and improving data integrity. Implemented robust validation logic and comprehensive automated tests to ensure API reliability and contract adherence. The work focused on backend development and testing, expanding test coverage for various validation scenarios and strengthening client reliability by minimizing runtime configuration errors related to IP address references in Kubernetes environments.