Eclipse Langium

Eclipse Langium provides a complete toolkit for implementing formal (domain-specific) languages in a web technology stack. The focus is on lowering the barrier to design, implement and integrate a language. This includes the following areas:

Define the concrete syntax and derive a parser for it
Define the abstract syntax and generate type definitions for it
A default language server according to the Language Server Protocol (LSP) with rich default functionality
Customization points to fine-tune all aspects of the language: linking, type system, validation, editor features, etc.
A library to interact with the language programmatically, e.g. to implement command line interfaces (CLIs) or automation services
Support for generating code and serializing documents
Integration with related tools such as diagram visualizations

Eclipse Langium explicitly does not include any text editing functionality, but relies on LSP to provide support for your language in a text editor (e.g. Eclipse Theia, VS Code, Monaco Editor, etc.)

Eclipse Langium also includes a growing collection of tools for integrating domain-specific languages with AI capabilities. This allows you to optimize AI applications for generating DSL programs, automatically generate DSL implementations, or create intelligent workflows involving Langium-based DSLs. These utilities enable AI-driven applications for Langium DSLs, accelerate language engineering efforts, and facilitate more accessible DSL integrations for users.

Basics

Project ID: ecd.langium
PMI: https://projects.eclipse.org/projects/ecd.langium
Website: https://langium.org
Download CSV: Commits , Issues , Reviews , IP Lab requests
Time range for commits: 2024-10-08 08:45:20 to 2025-09-26 08:18:15.
Time range for issues: 2024-10-07 22:14:41 to 2025-10-02 22:45:00.
Time range for reviews: 2024-10-08 11:06:12 to 2025-10-02 10:28:42.

Repositories

Repository	Commits	Reviews	Issues
https://github.com/eclipse-langium/langium	140	111	63
https://github.com/eclipse-langium/langium-previews	24	0	0
https://github.com/eclipse-langium/langium-website	14	13	12
https://github.com/eclipse-langium/langium-ai	10	2	5
https://github.com/eclipse-langium/.eclipsefdn	4	2	0

Activity - commits

There have been 192 commits made by 22 people on 5 repositories over the last 12 months.

Activity - issues

There have been 80 issues submitted by 39 people on 3 repositories over the last 12 months.

Activity - reviews

There have been 128 reviews submitted by 25 people on 4 repositories over the last 12 months.

The EMO oversees the lifecycle of Eclipse projects, trademark and IP management, and provides a governance framework and recommendations on open source best practices.

See the project’s PMI page at https://projects.eclipse.org/projects/ecd.langium

Releases

Reviews

Eclipse Langium 2025.04 Restructuring (2025-04-09) – see review
Eclipse Langium 3.3.0 Release (2024-10-16) – see review
Creation (2023-06-14) – see review

IP Lab requests

Organization Settings

GitHub organization: eclipse-langium
2FA enforced: True
Default workflow permissions: read

Branch Protections

This project has a total of 6 repositories in its associated GitHub organization eclipse-langium . The graph below outlines the percentange of repositories that have either defined a Branch Protection Rule or Repository Ruleset: