During March 2025, Harald Mack focused on modernizing the frontend toolchain for the ssciwr/mondey repository by updating core dependencies and development tools. He upgraded packages such as Svelte, Vite, Playwright, and ESLint-related modules to their latest versions, addressing security and compatibility concerns while reducing technical debt. Working primarily with JavaScript and TypeScript, Harald streamlined package management processes to enable faster development cycles and more reliable builds. His targeted changes improved the stability and maintainability of the codebase, laying a foundation for future enhancements. The work demonstrated a methodical approach to dependency updates and frontend development within a short timeframe.