Worked on the rathena/rathena repository to address a critical bug affecting shop interactions in game development scripts. Focused on improving the user experience for Arrow Merchant and Ninja Tool Merchant shops, the developer resolved an issue where players could become stuck after pressing Cancel. The solution involved replacing the close command with close2 and adding break statements after callshop commands, ensuring proper shop closure and responsiveness. This scripting change enhanced shop interaction reliability and reduced unresponsive states. The work included targeted regression checks, code review, and clear documentation, demonstrating strong skills in bug fixing, scripting, and collaborative game development workflows.