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@tweag

Tweag by Modus Create

Improving the craft of software engineering

Hello from the Tweag team!

Scale your engineering power

At Tweag we love using open source methods and research ideas to improve software quality and reliability. We are big on composable software: functional, typed, immutable. You might have seen some of our work in your own favourite technical community, or read some of our articles.

We're hiring, globally, so if you want to shape the future of the software industry working with innovative clients and smart, friendly colleagues, read more here!

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  1. rules_nixpkgs rules_nixpkgs Public

    Rules for importing Nixpkgs packages into Bazel.

    Starlark 363 92

  2. ormolu ormolu Public

    A formatter for Haskell source code

    Haskell 1k 87

  3. jupyenv jupyenv Public

    Declarative and reproducible Jupyter environments - powered by Nix

    Nix 730 154

  4. FawltyDeps FawltyDeps Public

    Python dependency checker

    Python 270 18

Repositories

Showing 10 of 443 repositories
  • monad-bayes Public

    A library for probabilistic programming in Haskell.

    tweag/monad-bayes’s past year of commit activity
    Jupyter Notebook 442 MIT 69 37 8 Updated Feb 1, 2026
  • jupyenv Public

    Declarative and reproducible Jupyter environments - powered by Nix

    tweag/jupyenv’s past year of commit activity
    Nix 730 MIT 154 38 17 Updated Feb 1, 2026
  • opam-nix Public

    Turn opam-based OCaml projects into Nix derivations

    tweag/opam-nix’s past year of commit activity
    Nix 148 MIT 46 9 1 Updated Jan 31, 2026
  • rules_haskell Public

    Haskell rules for Bazel.

    tweag/rules_haskell’s past year of commit activity
    Starlark 279 Apache-2.0 89 178 (19 issues need help) 38 Updated Jan 31, 2026
  • nixpkgs Public Forked from NixOS/nixpkgs

    Nix Packages collection

    tweag/nixpkgs’s past year of commit activity
    Nix 1 MIT 18,049 0 2 Updated Jan 31, 2026
  • ouroboros-consensus Public Forked from IntersectMBO/ouroboros-consensus

    Implementation of a Consensus Layer for the Ouroboros family of protocols

    tweag/ouroboros-consensus’s past year of commit activity
    Haskell 0 Apache-2.0 39 0 7 Updated Jan 31, 2026
  • tweag/cooked-validators’s past year of commit activity
    Haskell 42 MIT 11 15 (1 issue needs help) 1 Updated Jan 31, 2026
  • ouroboros-consensus-testing Public

    Implementation of a Consensus Layer for the Ouroboros family of protocols

    tweag/ouroboros-consensus-testing’s past year of commit activity
    Haskell 2 Apache-2.0 0 1 4 Updated Jan 31, 2026
  • webauthn Public

    A library for parsing and validating webauthn/fido2 credentials

    tweag/webauthn’s past year of commit activity
    Haskell 36 Apache-2.0 14 18 0 Updated Jan 30, 2026
  • cardano-hoarding-node Public

    Hoarding Node for Cardano

    tweag/cardano-hoarding-node’s past year of commit activity
    Nix 1 0 14 3 Updated Jan 30, 2026