# JetBrains/MPS

JetBrains Meta programming System

Repository: https://github.com/JetBrains/MPS
Canonical: https://ross.abutalabs.com/products/mps
Homepage: http://jetbrains.com/mps
Language: JetBrains MPS
License: Apache-2.0
License Family: permissive
Topics: domain-specific-language, dsl
Last push: 2026-08-26T17:04:28+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 5497, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1656, forks 309 (observed 2026-08-28T04:05:17.968287+00:00)

## What it is
JetBrains MPS is an open-source meta-programming system (language workbench) for designing domain-specific languages with a complete development environment. It provides a projectional editor with completion, semantics, and type checking out of the box, plus generators that compile DSLs into target languages such as Java, C, and XML.

## Use cases
- create a domain-specific language for my field
- build a DSL with editor completion and type checking
- projectional editor supporting math notation, diagrams, and forms
- generate Java, C, or XML code from a custom language
- language workbench for language engineering
- define a non-textual DSL with full IDE support
- implement domain logic in concepts my domain experts understand

## When to choose
- You need to design a DSL with a full IDE experience (completion, intentions, type checking) without building editor tooling from scratch
- Your notation must be non-textual - mathematical symbols, tables, diagrams, or forms - via projectional editing
- You want to generate code for multiple target languages from one language definition
- You are building extensible language families for a specific engineering domain, like embedded software or legislation

## When to avoid
- You only need a lightweight textual DSL parsed from source files - parser generators like ANTLR are simpler
- Your workflow depends on plain text files and standard diff/merge tooling, since projectional models are not text
- You want a quick one-off scripting tool - MPS has a significant learning curve and is aimed at language engineering

## Facets
- artifact type: application
- maturity: stable
- function: programming-language, editor, compiler, type-system, developer-tools
- domain: programming-languages, developer-tools, compilers
- platform: jvm, cross-platform, windows
- tags: dsl, language-workbench, projectional-editor, meta-programming, code-generation, language-design, jetbrains, ide, modeling, desktop, linux, macos

## Member repositories
- JetBrains/MPS (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:17.968287+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T03:44:48.414626+00:00, confidence not recorded.
  - readme: https://github.com/JetBrains/MPS (fetched 2026-08-28T04:05:17.968287+00:00, sha 239ed68a0cfd)
  - homepage: http://jetbrains.com/mps (fetched 2026-08-29T11:17:34.748963+00:00, sha 5d477aafe8de)
  - site_page: https://www.jetbrains.com/legal/docs/company/useterms (fetched 2026-08-29T11:17:34.806869+00:00, sha 4a140f196063)
  - site_page: https://www.jetbrains.com/legal/docs/privacy/privacy (fetched 2026-08-29T11:17:34.803658+00:00, sha 5818b25a9c36)
  - site_page: https://www.jetbrains.com/store (fetched 2026-08-29T11:17:34.798564+00:00, sha d0c97d92d60b)
  - site_page: https://www.jetbrains.com/help (fetched 2026-08-29T11:17:34.800666+00:00, sha 001d63ab7dbc)
  - site_page: https://www.jetbrains.com/company (fetched 2026-08-29T11:17:34.802248+00:00, sha e00f97094d79)
- Data as of 2026-08-30T08:39:29.467469+00:00.