Worked on enhancing Rust development workflows in Visual Studio Code by implementing cursor-based run command modes in the rust-lang/rust and rust-lang/rust-analyzer repositories. Leveraging TypeScript and JavaScript, introduced the ability to run tests or binaries directly at the cursor position, with optional mode arguments and cursor-range checks for precise execution. Refactored the command factory to remove special-casing and unified command creation logic, resulting in a cleaner, more maintainable architecture. These improvements streamlined targeted testing and debugging, improved consistency across Rust tooling in VSCode, and reduced maintenance overhead, demonstrating strong skills in codebase maintenance, refactoring, and extension development.