Worked on enhancing the robustness of the guessing game within TheOdinProject/curriculum by addressing input validation issues. Focused on the evaluateGuess function, introducing an else block to ensure that invalid inputs are properly handled and categorized, which led to more predictable application behavior and reduced the likelihood of edge-case failures. Utilized JavaScript for both the implementation and testing phases, emphasizing careful handling of user input and logical branching. The work concentrated on bug fixing rather than feature development, demonstrating attention to detail and a methodical approach to improving code reliability within an established JavaScript codebase through targeted validation improvements.