Tzvetomir Zlatinski worked on the shader-slang/slang repository, focusing on improving compatibility for legacy HLSL compilers. He addressed a bug that prevented support for older HLSL versions by updating preprocessor definitions and aligning test expectations, particularly in slang.cpp and related .expected files. Using C++ and HLSL, he ensured that the build system could reliably target HLSL 2018, reducing platform-specific issues for downstream users. His work required a detailed understanding of compiler development and shader toolchains, resulting in a stable update that maintained backward compatibility and improved the reliability of builds for projects depending on legacy shader infrastructure.