eclipse-langium/langium

Health v2 · maintenance only

Adoption not part of the score

1031 stars · 102 forks observed · 2026-09-03

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Eclipse Langium is a TypeScript framework for building programming languages and domain-specific languages with built-in Language Server Protocol support. It generates typed ASTs from a grammar declaration language and lets languages run in VS Code, browsers, CLIs, and servers.

Use cases

• create a domain-specific language for my project
• build a custom programming language in TypeScript
• add language server support for my DSL in VS Code
• write a code generator for a custom config language
• build a low-code platform with its own language
• implement an interpreter or validator for a DSL
• run my language tooling in the browser

When to choose

• you want to build a DSL or programming language on the TypeScript/Node.js stack
• you need LSP-based IDE support (VS Code, Theia) with minimal effort
• you want a modern successor to Xtext in the web ecosystem
• you need your language tooling to run in browsers, CLIs, or servers

When to avoid

• you need JVM-based language tooling or Xtext's existing ecosystem
• you only need a simple parser without IDE features - a parser library like Chevrotain alone may suffice
• your tooling must be written in a language other than TypeScript/JavaScript

Facets

framework · maturity active

parser compiler interpreter developer-tools sdk programming-languages parsers developer-tools compilers cross-platform browser language-engineering language-server-protocol dsl grammar-language chevrotain xtext-successor vscode-extension code-generation low-code nodejs typescript vscode

Member repositories

For agents

markdown · JSON · MCP: product_card(name="eclipse-langium/langium")