Announcing Mutation Testing in Haskell

▤ Summary

Sydtest now offers mutation testing as a generally available feature for Haskell developers. The launch helps teams verify that their test suites actually fail when code is changed in unintended ways. The article positions the feature as especially useful in AI-assisted development, where code volume can outpace test quality. It also explains how to enable the check in a Nix flake and how to disable selected mutations when full coverage is not needed. The release is already being used in real projects, which suggests the feature is production-ready.

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