During November 2025, Liucj1228 enhanced the levizh/rt-thread repository by delivering comprehensive documentation improvements for file operation functions within the libc/syscalls module. Focusing on maintainability and clarity, Liucj1228 added detailed comments to the C codebase, ensuring that API usage and intent were clearly communicated to future contributors. This work aligned with repository standards and commit messaging practices, streamlining onboarding and code review processes. By emphasizing documentation quality and consistency, Liucj1228 reduced the likelihood of usage errors and support overhead. The contribution demonstrated proficiency in C programming, embedded systems, and technical documentation, providing lasting value for the project’s maintainers.