Shamaton77 upgraded the MsgPack library from version 2.4.0 to 3.0.0 across the gofiber/fiber and gofiber/utils repositories, focusing on enhancing binary serialization performance and expanding feature support within the Fiber framework. By standardizing dependency management and ensuring compatibility between repositories, Shamaton77 improved maintainability and reduced divergence in the codebase. The work involved backend development and API integration using Go, with careful attention to transparent commit traceability. Although the scope was limited to two features over one month, the changes addressed core infrastructure needs and demonstrated a methodical approach to dependency upgrades and performance optimization in Go-based backend systems.