typelevel

typelevel/cats-effect

The pure asynchronous runtime for Scala

2.2K stars 578 forks 2.2K watchers Scala Apache License 2.0

asynchronous effects fp scala typeclasses

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2 Open Issues Need Help Last updated: Aug 20, 2026

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`OutOfMemoryError` not propagated when `IO` originates from `CompletableFuture` 2 days ago

:beetle: bug good first issue

typelevel/cats-effect

2.2K

The pure asynchronous runtime for Scala

Scala

#asynchronous#effects#fp#scala#typeclasses

Converge on a single nomenclature for fiber blocking in docs 4 months ago

good first issue :books: docs

typelevel/cats-effect

2.2K

The pure asynchronous runtime for Scala

Scala

#asynchronous#effects#fp#scala#typeclasses