Worked on enhancing the Azure Container Registry API within the Azure/azure-rest-api-specs repository, focusing on adding support for writable cache repositories and improving authentication configurations for upstream sources. Leveraged API development skills and JSON Schema expertise to migrate writableCacheRepos from a boolean to an enum, aligning with the 2026-03-01-preview specification. Updated RegistryCreate.json and related example responses to improve documentation accuracy and developer onboarding. Addressed code quality by executing extensive lint fixes, standardizing property names, and cleaning suppression paths. These changes improved API usability and security, enabling more efficient integration workflows for container registry customers using Azure services.