This is the twenty-second edition of our GHC activities report, which describes the work on GHC, Cabal and related projects that we are doing at Well-Typed. The current edition covers roughly the months of December 2023 to February 2024. You can find the previous editions collected under the ghc-activities-report tag.

Many thanks to our sponsors who make this work possible: Anduril, Hasura and Juspay. In addition, we are grateful to Mercury for funding specific work on improved performance for developer tools on large codebases, and to the Sovereign Tech Fund for funding work on Cabal.

However, we need more sponsorship to sustain the team! If your company might be able to contribute funding to sustain this work, please read about how you can help or get in touch.

Of course, Haskell tooling is a large community effort, and Well-Typed’s contributions are just a small part of this. This report does not aim to give an exhaustive picture of all GHC work that is ongoing, and there are many fantastic features currently being worked on that are omitted here simply because none of us are currently involved in them. Furthermore, the aspects we do mention are still the work of many people. In many cases, we have just been helping with the last few steps of integration. We are immensely grateful to everyone contributing to GHC!

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