GitHub has developed Tree-sitter, a sophisticated parsing system integrated into the Atom text editor, to enhance code readability and writing by maintaining a syntax tree that accurately represents the structure of code in real-time. Unlike traditional text editors that rely on simple pattern recognition, Tree-sitter offers improved syntax highlighting and reliable code folding based on actual code syntax rather than indentation. This system supports syntax-aware selection with new editing commands and enables incremental parsing to avoid delays in syntax highlighting updates while typing. Currently, Tree-sitter supports 11 programming languages, with plans to expand further, and GitHub encourages community involvement and feedback to refine and extend its capabilities.