During August 2025, Mingfei Fang updated the welovej/azure-rest-api-specs repository to clarify the deprecation of the RetainedData feature, providing guidance for customers to migrate task data uploads to Azure Storage using TaskCompletion. Focusing on API specification and documentation, Mingfei revised technical descriptions to align with deprecation policy, ensuring backward compatibility and minimizing disruption for existing users. The work involved careful change management and version control using TypeScript, emphasizing clear communication of migration paths rather than functional changes. This documentation-focused contribution reduced future support risks and enabled a smoother transition for customers, reflecting a methodical approach to API lifecycle management.