Langium CLI

The Langium CLI (`langium-cli`) is the command-line interface for the Eclipse Langium framework, a powerful toolset for building domain-specific languages (DSLs) with full language server protocol (LSP) support. Currently at stable version 4.2.1, it follows a regular release cadence with minor versions released every few months and major versions annually or as significant breaking changes necessitate. Its primary function is to generate the core language infrastructure—including parsers, ASTs, and language server components—from a Langium grammar definition file. It differentiates itself by deeply integrating with TypeScript and VS Code, providing a robust foundation for creating custom programming languages and their development tooling efficiently, without manual boilerplate code generation. The CLI requires a configuration file, `langium-config.json`, to specify language details, grammar paths, and output targets for various artifacts like TextMate syntax highlighting, Monarch syntax highlighting, Prism syntax highlighting, and railroad diagrams.