Developed and delivered a validation webhook for the red-hat-data-services/odh-model-controller repository, focusing on enforcing unique tier levels within the tier-to-group-mapping ConfigMap to prevent misconfigurations and improve data integrity. Leveraged Go and Kubernetes admission webhook patterns to implement this feature, incorporating test-driven development practices to ensure reliability and maintainability. Added comprehensive end-to-end tests to safeguard against regressions and promote predictable production behavior. Prioritized code quality by addressing lint issues and aligning with project standards, while collaborating closely with reviewers to refine documentation and maintain clear commit hygiene throughout the development process. No bug fixes were reported during this period.