During August 2025, Topi focused on backend reliability and cross-platform compatibility across the anthropics/beam and apache/flink-cdc repositories. In anthropics/beam, Topi addressed a Windows compatibility issue in the YAML JavaJarProvider by replacing the Unix-specific 'which' command with Python’s shutil.which, ensuring consistent Java executable discovery on Windows systems. For apache/flink-cdc, Topi improved data integrity by enforcing stricter database name validation in the PostgresDataSourceFactory, adding comprehensive tests to cover multi-database scenarios. These Python and Java-based changes reduced runtime errors related to environment and configuration, resulting in safer deployments and clearer error reporting for database integration workflows.