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atelier-prelude: Custom relude-based prelude with Effectful conventions

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A custom prelude based on relude, adapted for Effectful — part of the atelier toolkit.

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Versions [RSS] 0.1.0.0, 0.2.0.0, 0.3.0.0, 0.3.1.0, 0.4.0.0, 0.4.1.0
Change log CHANGELOG.md
Dependencies base (>=4.18 && <4.23), effectful-core (>=2.7 && <2.8), relude (>=1.2 && <1.3) [details]
Tested with ghc ==9.14.1, ghc ==9.6.7, ghc ==9.8.4, ghc ==9.10.3, ghc ==9.12.4
License MIT
Author Christian Georgii
Maintainer victor.bakke@tweag.io
Uploaded by Gipphe at 2026-09-18T09:06:28Z
Revised Revision 1 made by Gipphe at 2026-09-25T13:08:40Z
Category Prelude
Home page https://github.com/tweag/tricorder/tree/main/atelier-prelude
Bug tracker https://github.com/tweag/tricorder/issues
Source repo head: git clone https://github.com/tweag/tricorder
Distributions Stackage:0.4.1.0
Reverse Dependencies 5 direct, 0 indirect [details]
Downloads 49 total (31 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2026-09-18 [all 1 reports]

Readme for atelier-prelude-0.4.1.0

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atelier-prelude

A custom prelude based on relude, adapted for Effectful conventions. Part of the atelier toolkit.

Usage

atelier-prelude exposes a module named Prelude. To make it the implicit prelude, hide base's Prelude with a mixin — GHC's automatic import Prelude then resolves to this one, with no NoImplicitPrelude and no per-module imports.

In package.yaml (hpack):

dependencies:
  - name: base
    mixin:
      - hiding (Prelude)
  - atelier-prelude

or in a .cabal file:

build-depends: base, atelier-prelude
mixins:        base hiding (Prelude)

Add -Wno-implicit-prelude to your ghc-options to silence the implicit-prelude warning.

What's different from relude

Lifted, IO-based operations from relude are intentionally not re-exported, so that effects are threaded explicitly through Effectful rather than performed in IO:

  • Relude.Lifted.* (system, environment, handle, terminal, file operations)
  • Relude.File
  • Relude.Print (console output)

Use the corresponding atelier-core effects instead — e.g. Atelier.Effects.Env, Atelier.Effects.File, Atelier.Effects.Console.

License

MIT — see LICENSE.