Ajashant upgraded the Azure Storage API in the test-repo-billy/azure-rest-api-specs repository to version 2025-01-01, introducing EncryptionInTransit support for SMB and NFS protocols and adding a Restore Storage Account API. The work involved updating Swagger definitions and documentation, ensuring that the new features aligned with existing API versions and maintained SDK compatibility. Ajashant performed impact analysis and refreshed tests to validate the changes, focusing on robust API design and cloud computing best practices. The implementation leveraged YAML and Markdown for specification and documentation, resulting in a cohesive upgrade that enhanced security and recovery capabilities without introducing regressions.