During March 2026, this developer enhanced cross-platform data sinking and integration readiness for the PolyDB research project. Working across the apache/incubator-wayang and duckdb/community-extensions repositories, they introduced an abstract TableSink operator with Java and Spark implementations, extending database support and improving schema management and error handling. The work included upgrading the SheetReader extension to version 0.2.0, aligning configuration and documentation for seamless PolyDB integration. Utilizing C++, Java, and Scala, they focused on robust unit testing and configuration management, resulting in improved data ingestion reliability, pipeline portability, and operational readiness across two critical repositories without introducing any new bugs.