mech-lang/mech

---

mech-lang/mech.json

{
  "createdAt": "2018-08-13T16:54:37Z",
  "defaultBranch": "main",
  "description": "🦾 Mech is a programming language for building data-driven systems like robots, games, and interfaces. Start here! ",
  "fullName": "mech-lang/mech",
  "homepage": "http://mech-lang.org",
  "language": "Rust",
  "name": "mech",
  "pushedAt": "2025-11-17T18:37:53Z",
  "stargazersCount": 249,
  "topics": [
    "compiler",
    "data-processing",
    "embedded",
    "game-programming",
    "iot",
    "live-programming",
    "programming-environment",
    "programming-language",
    "reactive-programming",
    "robotics"
  ],
  "updatedAt": "2025-11-19T11:18:30Z",
  "url": "https://github.com/mech-lang/mech"
}

Mech is for building data-driven, reactive systems like robots, games, embedded devices and more.

It simplifies data distribution, transformation, and analysis so you can focus on your project.

• Try Mech online in your browser.
• Read the docs to learn the language.
• Follow our blog to stay updated on new developments.

The following code implements FizzBuzz in Mech:

See the docs for an extended version that runs live in your browser.

Some notable features of Mech are demonstrated in this short program:

• Concise Syntax: Expressive and flexible, with no need for keywords or semicolons; Mech programs are generally shorter than in other languages.
• Broadcast Operations: Vector operations apply elementwise automatically, removing explicit loops and enabling efficient vectorization.
• Logical Indexing: Vector elements are conditionally selected using broadcast logic operations, enabling declarative iteration and parallel execution.
• Type Inference: Variable and expression types are inferred, so explicit type declarations are often unnecessary.
• Immutable: Variables are immutable unless specified, promoting safer code and easier reasoning.
• Rich Text: Mech programs support rich formatting and literate programming through Mechdown, a Markdown dialect.

💾 Download and Install

From Binary

Download the precompiled latest release for your platform.

From Source

To build Mech from source, you’ll first need to install Rust (make sure to install a recent version on the nightly release channel, currently we are developing against nightly-2025-07-31).

Then follow the instructions below to compile the Mech toolchain, bundled in a single executable called mech:

git clone https://gitlab.com/mech-lang/mech
cd mech
cargo build --bin mech --release

Alternatively, you can install Mech directly via Rust’s Cargo utility:

cargo install mech

📚 Documentation

New to Mech? Start with Learn Mech in Fifteen Minutes.

Comprehensive documentation is available at docs.mech-lang.org and open-sourced on GitHub.

🪐 Community

The Mech community stays active at a few places around the Internet:

• Discord - for live chat
• GitHub - for code and issues
• YouTube - for video tutorials
• Reddit - for help and general discussion
• Mailing List - for dev discussion

Feel free to stop by and introduce yourself — we’re happy to meet new users and answer questions!

🗺️ Project Roadmap

Mech v0.2 is currently beta status, meaning most intended features are implemented, but rough edges abound and there is a general lack of documentation. Development is focused on testing and documentation.

A Brief Roadmap:

• ☑️ v0.1 - proof of concept system - minimum viable language implementation
• 📍 v0.2 - data specification - formulas, defining and manipulating data
• ☐ v0.3 - program specification - functions, modules, state machines
• ☐ v0.4 - system specification - tools, distributed programs, capabilities

For more details, read the ROADMAP.

A new version of Mech is released every week.

🐲 Notice

Mech should be considered unstable and therefore unfit for use in critical systems until v1.0 is released.

⚖️ License

Licensed under Apache 2.0.