Worked on the toss/frontend-fundamentals repository to address a bug in the login redirect logic, focusing on improving the reliability of the authentication flow. The solution involved refining the conditional logic on the login start page so that users are redirected to the home page only after successful authentication, thereby preventing incorrect redirects and enhancing the accuracy of the login process. This targeted fix was implemented using Markdown for documentation and careful code review, resulting in a single, focused commit. The change improved user experience and reduced potential support issues related to login redirects, demonstrating attention to detail and clear communication skills.