Raj Mahadev developed and delivered a comprehensive build-from-source tutorial for the opencv/opencv repository, focusing on Windows environments using MSYS2 and Visual Studio Code. Leveraging expertise in C++ development, build configuration, and documentation, Raj authored end-to-end instructions that streamline the onboarding process for new contributors and improve build reproducibility. The tutorial, merged via PR #28618, addressed common setup challenges and clarified contribution workflows, including PR readiness and licensing compliance. By enhancing Markdown-based documentation and aligning with project guidelines, Raj’s work reduced setup time for Windows-based builds and provided a clear, maintainable path for future contributors to follow.