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<code>Raises</code> and <code>Handles</code> aliases on Scala 3?

Status: Open.

#666 In typelevel/cats-mtl;

· armanbilge opened on Nov 21, 2025

Surfacing submarines

Status: Open.

#660 In typelevel/cats-mtl;

· durban opened on Oct 21, 2025

Handle.allow(F) and (Applicative|Monad)Throw appear to be incompatible.

Status: Open.

#652 In typelevel/cats-mtl;

· morgen-peschke opened on Sep 30, 2025

Handle creates a black-box when Submarine escapes rescue

Status: Open.

#648 In typelevel/cats-mtl;

· morgen-peschke opened on Sep 15, 2025

Are cats.mtl.Handle[F[_], E] and cats.ApplicativeError[F[_], E] the same abstraction?

Status: Open.

#646 In typelevel/cats-mtl;

· benhutchison opened on Sep 9, 2025

Ergonomics of Raise need improvement

Status: Open.

#645 In typelevel/cats-mtl;

· benhutchison opened on Sep 8, 2025

Would writing <code>type ErrS[F[_]] = Handle[F, String]</code> inside Cats MTL be doing the ecosystem a favour?

Status: Open.

#644 In typelevel/cats-mtl;

· benhutchison opened on Sep 8, 2025

Rebranding Cats MTL to emphasize the Capabilities, not the Monad Transformers

Status: Open.

#516 In typelevel/cats-mtl;

· benhutchison opened on Aug 5, 2023

handle error with partial function

Status: Open.

#444 In typelevel/cats-mtl;

· prophe05 opened on Sep 2, 2022

Can't migrate from v0.7: StateT[EitherT, ...], ...] vs. EitherT[StateT, ...], ...]

Status: Open.

#305 In typelevel/cats-mtl;

· marcinzh opened on Jan 25, 2021

New typeclass to run reader-like effects

Status: Open.

#287 In typelevel/cats-mtl;

· FunFunFine opened on Nov 30, 2020

Inductive instances over ContT

good first issue

help wanted

Status: Open.

#227 In typelevel/cats-mtl;

· djspiewak opened on Jun 1, 2020