Developed the mpduck DuckDB extension in the duckdb/community-extensions repository to support FIS Prophet data interchange, focusing on enhancing actuarial workflow interoperability. The work involved implementing functionality for reading and writing FIS Prophet files across multiple formats, streamlining data flows between systems. Leveraging C++ and SQL, the extension was versioned to 0.0.2 to ensure compatibility with the latest HEAD/main and v1.4-andium branch references. Collaboration was documented through co-authored commits, and the repository was prepared for downstream pipelines and testing. The project emphasized robust database management, extension development, and clear version control practices to facilitate future integration and maintenance.