I'm pleased to announce the release of proto-lens-0.4.0.0. The library provides an API for protocol buffers, a language-independent binary file format. Cabal and Stack projects can use proto-lens to automatically generate Haskell source bindings from the original protocol buffer specifications. Some significant changes in this new release include: - Simplifying the overloaded lens instances to improve readability and type error messages (along with the associated release of lens-labels-0.3.0.0) - Switching to a custom class for default messages - Hiding the internals of generated message types - Making the Show instances more readable and concise - Splitting the Cabal support into finer-grained packages, for better integration with Nix and Bazel For general library documentation and tutorials: https://google.github.io/proto-lens/ For assistance in migrating from earlier versions: https://github.com/google/proto-lens/wiki/Migration-Guide For detailed changelogs: https://hackage.haskell.org/package/proto-lens/changelog https://hackage.haskell.org/package/proto-lens-protoc/changelog Best, -Judah