Developed and delivered a new Cozip Extension for DuckDB within the duckdb/community-extensions repository, enabling the database to read and validate cozip priority indexes. The work focused on C++ and database extension development, with careful attention to documentation and usage examples to support adoption and correct implementation. By contributing comprehensive extension documentation and clear commit messages, the developer enhanced the discoverability and onboarding process for users. The extension expands DuckDB’s data validation capabilities, supporting more robust data pipelines and increasing confidence in index-derived queries. The month’s efforts centered on feature delivery and documentation, aligning with open-source collaboration practices.