During January 2026, this developer enhanced the Kotlin/kotlinx.serialization repository by adding JSON5 serialization support to the community-supported formats. The work involved implementing serialization logic in Kotlin and updating Markdown documentation to ensure clear guidance for users adopting JSON5. By aligning the documentation with repository formatting standards, the developer improved discoverability and reduced onboarding friction for new users. This feature addressed growing demand for JSON5 interoperability, expanding the library’s capabilities and supporting broader ecosystem alignment. The contribution focused on both technical implementation and user experience, leveraging skills in Kotlin, serialization, and technical writing to deliver a cohesive and maintainable update.