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Meta Experimental

These are Meta projects that are not necessarily used in production but are being developed in the open nevertheless.

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  1. Recoil Recoil Public archive

    Recoil is an experimental state management library for React apps. It provides several capabilities that are difficult to achieve with React alone, while being compatible with the newest features o…

    JavaScript 19.6k 1.2k

  2. libunifex libunifex Public

    Unified Executors

    C++ 1.7k 205

  3. Robyn Robyn Public

    Robyn is an experimental, AI/ML-powered and open sourced Marketing Mix Modeling (MMM) package from Meta Marketing Science. Our mission is to democratise modeling knowledge, inspire the industry thr…

    Jupyter Notebook 1.4k 417

  4. hermit hermit Public

    Hermit launches linux x86_64 programs in a special, hermetically isolated sandbox to control their execution. Hermit translates normal, nondeterministic behavior, into deterministic, repeatable beh…

    Rust 1.3k 42

  5. MIRAI MIRAI Public archive

    Rust mid-level IR Abstract Interpreter

    Rust 1k 83

  6. reverie reverie Public

    An ergonomic and safe syscall interception framework for Linux.

    Rust 810 37

Repositories

Showing 10 of 43 repositories
  • free-threading-benchmarking Public

    Benchmark results for free-threaded builds of Python

    facebookexperimental/free-threading-benchmarking’s past year of commit activity
    27 BSD-3-Clause 5 2 0 Updated Jan 17, 2026
  • triton Public

    Github mirror of trition-lang/triton repo.

    facebookexperimental/triton’s past year of commit activity
    MLIR 124 MIT 33 3 53 Updated Jan 17, 2026
  • hermit Public

    Hermit launches linux x86_64 programs in a special, hermetically isolated sandbox to control their execution. Hermit translates normal, nondeterministic behavior, into deterministic, repeatable behavior. This can be used for various applications, including replay-debugging, reproducible artifacts, chaos mode concurrency testing and bug analysis.

    facebookexperimental/hermit’s past year of commit activity
    Rust 1,347 42 21 8 Updated Jan 16, 2026
  • moxygen Public

    Implementation of IETF MOQ protocol

    facebookexperimental/moxygen’s past year of commit activity
    C++ 91 MIT 18 8 5 Updated Jan 16, 2026
  • rust-shed Public

    Repository containing Rust crates common between other Facebook open source projects (like Mononoke or Eden).

    facebookexperimental/rust-shed’s past year of commit activity
    Rust 142 Apache-2.0 45 0 2 Updated Jan 16, 2026
  • edencommon Public

    Shared library for Watchman and Eden projects.

    facebookexperimental/edencommon’s past year of commit activity
    C++ 13 MIT 17 2 0 Updated Jan 16, 2026
  • semcode Public

    semcode

    facebookexperimental/semcode’s past year of commit activity
    Rust 42 Apache-2.0 12 1 0 Updated Jan 15, 2026
  • cxx Public Forked from dtolnay/cxx

    Safe interop between Rust and C++

    facebookexperimental/cxx’s past year of commit activity
    Rust 4 Apache-2.0 466 0 1 Updated Jan 15, 2026
  • reverie Public

    An ergonomic and safe syscall interception framework for Linux.

    facebookexperimental/reverie’s past year of commit activity
    Rust 810 37 2 0 Updated Jan 14, 2026
  • moq-encoder-player Public

    This project is provides a minimal implementation (inside the browser) of a live video and audio encoder and video / audio player creating and consuming IETF MOQ stream. The goal is to provide a minimal live platform components that helps testing IETF MOQ interop

    facebookexperimental/moq-encoder-player’s past year of commit activity
    HTML 88 MIT 17 0 1 Updated Jan 13, 2026
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