Ali Bagherifam modernized the Kotlin Multiplatform opt-in documentation in the JetBrains/kotlin-web-site repository, focusing on improving clarity and maintainability. He updated the documentation examples to use the compilerOptions DSL, replacing the deprecated LanguageSettingsBuilder in line with current Kotlin API recommendations. This work, implemented using Kotlin, Groovy, and Markdown, aimed to reduce onboarding friction for new contributors and minimize future maintenance risks. By aligning the documentation with the latest Gradle and Kotlin Multiplatform practices, Ali ensured that contributors have accurate, up-to-date guidance. The depth of the update reflects a targeted approach to documentation quality and long-term project sustainability.