Hyun Jin worked on the JetBrains/kotlin-web-site repository, focusing on improving the accuracy and usability of Kotlin documentation. Over the course of a month, Hyun Jin identified and fixed three broken documentation links within Markdown files, specifically targeting the appendLine extension, the @kotlin.jvm.JvmRepeatable annotation, and the Comparator reference in the list-operations guide. Using technical writing and documentation skills, Hyun Jin ensured that the updates maintained consistency with existing standards and enhanced navigation for users. The work addressed potential confusion for developers, contributing to a smoother onboarding experience and reinforcing trust in the Kotlin documentation ecosystem.