During January 2026, Songe Li contributed to the Kotlin/kotlinx.serialization repository by implementing JSON5 serialization support, expanding the library’s ability to interoperate with JSON5-formatted data. This work involved updating both the serialization logic in Kotlin and the accompanying documentation written in Markdown, ensuring that developers could easily discover and adopt the new format. Songe aligned the documentation with repository guidelines to streamline onboarding and clarify usage. While the contribution was focused on a single feature and did not address bug fixes, it demonstrated a clear understanding of serialization concepts and attention to detail in both technical implementation and user-facing documentation.