Worked on enhancing the CSE Machine within the source-academy/js-slang repository by addressing interpreter correctness and maintainability. Focused on refining for-loop and block execution, the developer refactored single-statement block processing and corrected assignment logic in for-loop initializations, improving the robustness of loop constructs. In the source-academy/frontend repository, they clarified and streamlined the BRANCH instruction documentation in CseMachineUtils.ts, ensuring more accurate internal references for future development. Utilizing TypeScript and applying skills in bug fixing, code refactoring, and compiler design, the work contributed to a more reliable course platform and clearer documentation for ongoing interpreter and frontend improvements.