Worked on performance instrumentation and build system enhancements across the facebookresearch/momentum and Buck2 repositories, focusing on maintainability and data integrity. Centralized profiling logic in momentum by refactoring expensive operation annotations into a shared C++ library layer, reducing duplicate calls and simplifying future instrumentation. Improved mesh data logging for visualization by ensuring attribute counts matched vertex counts, preventing data corruption. In Buck2 and buck2-prelude, introduced stub library targets in Starlark and C++ to streamline packaging, allowing system libraries to take precedence over bundled ones. These efforts strengthened cross-repo consistency, optimized performance, and improved the reliability of build and visualization pipelines.