Worked on the rust-lang/libc repository to enhance observability of inter-process communication resources by exposing message queue byte usage through the msqid_ds structure. This feature made the __msg_cbytes field publicly accessible across platform-specific implementations, enabling external monitoring and management tools to track message queue capacity. The approach focused on extending the cross-platform API surface while maintaining consistency in system programming interfaces. Leveraging Rust and FFI skills, the work improved operational visibility for systems relying on message queues and contributed to the ongoing maintainership of libc bindings. No major bug fixes were addressed during this period, with efforts centered on feature delivery.