Greybel-JS

Greybel-JS (v3.7.12) is a CLI and library for transpiling, interpreting, and debugging GreyScript, a scripting language for the Grey Hack game. It provides a parser, lexer, compiler, and interpreter with full GreyScript API support. Key differentiators are its ability to manage imports, minimize scripts (up to 40% size reduction), beautify code, and run GreyScript outside the game environment. The package requires Node >=20.17.0 and has optional peer dependencies on React and Monaco editor for the web UI. It offers advanced features like dependency management, environment variables, a REPL, and a debugging UI. Compared to alternatives, Greybel-JS is the main GreyScript toolchain maintained by the community.