Worked on the dotnet/sdk repository to upgrade the prebuilt baseline to System.Diagnostics.DiagnosticSource version 8.0.1, focusing on improving long-term maintainability and compatibility for downstream consumers. The approach involved updating the build configuration to pin the new diagnostic source version, ensuring the SDK consistently uses the latest stable release. This change enhanced observability integration and reduced maintenance risk by aligning with current .NET ecosystem standards. The work was implemented using C# and build automation tools, with careful attention to dependency management and version control. No bugs were addressed during this period, as the primary focus was on feature delivery and stability.