Worked on the tree-sitter/tree-sitter and nvim-treesitter/nvim-treesitter repositories, focusing on reliability, error handling, and build correctness. Addressed issues in the CLI test runner by ensuring skipped tests are accurately counted, improving test reporting for developers. Enhanced Windows compatibility by preserving shell return codes during plugin installation, allowing TSInstallSync to report errors correctly. Updated build systems to enforce the C11 standard, increasing cross-platform portability. Improved parsing reliability by fixing the ParseSummary success indicator, ensuring parsing errors are surfaced to downstream tools. Utilized Rust and Lua, applying skills in CLI development, testing frameworks, compiler configuration, and shell scripting throughout the work.