December 2025 focused on hardening reliability and improving contributor onboarding. In apache/gravitino, we delivered three stability fixes: null safety for AddPartitions to prevent NPEs, minimum capacity enforcement in LineageSinkManager to avoid zero-capacity configurations, and guard logic to prevent deleting schemas that still contain active topics. All changes included unit tests and passed the full build/test suite. In meshery/meshery, we introduced a contributor onboarding document for Salmane Khalili, streamlining new contributor integration and reducing ramp-up time. Collectively these changes reduce runtime errors, prevent data/config inconsistencies, and improve maintainability, while showcasing Java/Gradle proficiency, test automation, and documentation practices.