Kevin implemented inlay hints for the Khan/wonder-blocks repository, enhancing the VSCode editing experience by displaying inline type information and parameter names. He configured the feature to be toggled with a keyboard shortcut and made it customizable through user settings, focusing on improving code comprehension and reducing onboarding time for developers. The work involved IDE configuration and extensive use of JSON to manage settings and integration points within the editor. While the project scope was limited to a single feature over one month, the solution addressed a clear developer need and established a foundation for future editor user experience improvements across the codebase.