Worked on the DataDog/datadog-sync-cli repository to improve the reliability of command-line data synchronization workflows. Focused on stabilizing the sync behavior by addressing a bug where the --filter argument was incorrectly applied to the diff command instead of the sync command, ensuring that user-specified filters now function as intended during synchronization. Utilized Python for CLI development and implemented targeted unit tests to validate the fix and maintain code quality. No new features were introduced during this period, as the primary emphasis was on bug resolution and enhancing maintainability, resulting in a more predictable and user-aligned CLI experience.