Worked on enhancing observability and diagnosability for the Buck2-prelude repository by delivering enriched logging for buckconfig operations. Developed a feature in Starlark that captures return values and call stacks in log entries, enabling detailed operational metrics collection. Introduced configurable flags to control the scope of buckconfig metrics, allowing targeted data gathering without affecting runtime performance. Focused on improving the linkage between code changes and business value by increasing visibility into buckconfig read operations, counts, and mode-switch changes. Leveraged skills in build system configuration, developer tooling, and logging to support data-driven performance tuning and faster issue resolution for the project.