Worked on the microsoft/vscode repository to enhance the reliability of CLI profiling workflows. Focused on debugging and refining the --prof-startup flag, ensuring it passed only the necessary port information rather than extraneous host parameters. This adjustment enabled accurate profiling of both the renderer and extension host, reducing noise in profiling data and streamlining the debugging process. Utilized TypeScript and CLI development skills to implement the fix, which improved the efficiency of performance experiments by delivering cleaner profiling traces. The work contributed to shorter debugging cycles and more reliable profiling behavior within the VS Code codebase during the development period.