Worked on the keycloak/keycloak repository to enhance authorization integrity by addressing a critical bug in resource validation. Focused on backend development using Java, the work introduced stringent checks to ensure only resources of the correct type could be associated with permissions, thereby preventing cross-type associations and potential misconfigurations. Improved error handling was achieved by validating resource names against expected entity types and throwing precise exceptions when mismatches occurred. Through targeted unit testing and careful updates to the getOrCreateResource() logic, the changes strengthened the accuracy and auditability of authorization models, ultimately closing a known issue and improving overall security and data integrity.