b-studios/scala-effekt

Extensible algebraic effects with handlers

Scala

148

407 commits

updated Sep 14, 2026

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DISCONTINUED

The Scala library "Scala Effekt" is discontinued. In 2020, its development has been superseded by our own standalone programming language Effekt, independent of Scala.

Due to its origins, but confusingly, both carry Effekt in their name. To disambiguate, we recommend to use Scala Effekt to refer to the library and Effekt to the standalone programming language.

The evolution of the Effekt language and its predecessors is explained here.

Scala Effekt

The Effekt library allows you to structure your effectful programs in a functional way. It thus represents an alternative to traditional monad transformer based program structuring techniques.

To use Effekt (tested with Scala 2.12 and Scala 2.13), include the following line to your build.sbt file:

resolvers += Opts.resolver.sonatypeSnapshots

libraryDependencies += "de.b-studios" %% "effekt" % "0.4-SNAPSHOT"

To learn how to use the library, see Your First Effect.

continuations
effects
scala

Contributors

b-studios

96 commits

dependabot[bot]

70 commits

xuwei-k

62 commits

b-studios/scala-effekt

Extensible algebraic effects with handlers

Scala

148

407 commits

updated Sep 14, 2026

See the code

README

Chat

DISCONTINUED

The Scala library "Scala Effekt" is discontinued. In 2020, its development has been superseded by our own standalone programming language Effekt, independent of Scala.

Due to its origins, but confusingly, both carry Effekt in their name. To disambiguate, we recommend to use Scala Effekt to refer to the library and Effekt to the standalone programming language.

The evolution of the Effekt language and its predecessors is explained here.

Scala Effekt

The Effekt library allows you to structure your effectful programs in a functional way. It thus represents an alternative to traditional monad transformer based program structuring techniques.

To use Effekt (tested with Scala 2.12 and Scala 2.13), include the following line to your build.sbt file:

resolvers += Opts.resolver.sonatypeSnapshots

libraryDependencies += "de.b-studios" %% "effekt" % "0.4-SNAPSHOT"

To learn how to use the library, see Your First Effect.

continuations
effects
scala

Contributors

b-studios

96 commits

dependabot[bot]

70 commits

xuwei-k

62 commits

Languages

Scala

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