Worked on the fmeum/bazel repository to enhance the Build Event Service by delivering a comprehensive update to the documentation for the --bes_upload_mode option. Focused on clarifying the behavior of each upload mode, with particular attention to fully_async, and provided detailed explanations of potential data loss scenarios to help users make safer configuration choices. Utilized Java and applied expertise in build systems and technical documentation to improve the clarity and maintainability of user guidance. This work aimed to reduce user confusion, support smoother onboarding, and decrease support overhead by making the configuration and adoption of BES features more transparent.