Antonin Decimo developed cross-platform Windows build support for the tree-sitter/tree-sitter repository, focusing on expanding platform compatibility and improving build reliability. He introduced Windows MinGW-w64 build capabilities, updating Makefiles and Windows-specific build scripts to enable both DLL and static library outputs compatible with MSVC and clang-cl toolchains. By integrating a dedicated Windows build step into the CI pipeline, Antonin ensured that each change is validated for Windows compatibility. His work leveraged Makefile and YAML, applying expertise in build systems, CI/CD, and Windows development. The project addressed the need for broader platform coverage and more robust artifact validation in automated workflows.