Developed the Document Revision Comparison feature for the outline/outline repository, enabling users to compare any two document revisions with enhanced data loading and a streamlined revision-selection interface. Focused on stability and correctness, the implementation ensured accurate diff rendering and maintained editor state during comparisons, addressing issues with loading-time diffs and preventing incorrect displays. Leveraged MobX for optimized reactive data flow and improved performance by restructuring store lookups. Utilized React, JavaScript, and TypeScript to deliver a responsive front end, aligning internationalization details and updating revision dropdown logic to support reliable data fetching, ultimately improving document history collaboration and governance.