Sonokai is a high-contrast Vim/Neovim colorscheme based on Monokai Pro, offering multiple variants (default, atlantis, andromeda, shusia, maia, espresso). It provides extensive customization options, support for tree-sitter, semantic highlighting, and optimizations for dozens of plugins. The repository includes a sophisticated code generation system that extracts syntax highlights from its own source and places them in after/syntax directories for on-demand loading, improving startup performance. It also comes with themes for popular statusline plugins (airline, lightline, lualine). The code is well-structured Vimscript with clear separation of concerns.