Worked on improving token management stability in the penpot/penpot repository by addressing a crash that occurred during token creation. Focused on the front end using Clojure and reactive programming techniques, implementing robust client-side error handling within the token form validation process. Validation errors from the reactive stream were intercepted, translated into user-friendly messages, and displayed in the UI, preventing unhandled exceptions and eliminating internal error crashes. This solution resolved issues with conflicting hierarchical token names, such as accent-color versus accent-color.blue.dark, resulting in a more predictable and user-friendly token creation experience that reduces downtime and support overhead.