Hello! I’m pleased to announce the initial release of fresnel, an optics library optimizing for few dependencies, familiar tools, and decent error messages, without sacrificing functionality. fresnel is available at: - https://hackage.haskell.org/package/fresnel-0.0.0.0 - https://github.com/fresnel/fresnel/releases/tag/0.0.0.0 Feature requests, issues, and other feedback are welcome at https://github.com/fresnel/fresnel/issues Overview: - Most of the optic types from lens and optics. No Indexed*, however. - Compose optics using . much like in lens. - Decent error messages, much like in optics. - Few dependencies. I’m considering pulling At/Ixed into a new package to reduce the dependency list that much more, out of a desire to “pay for what you use.” I’m considering divesting the package of the profunctors dependency for much the same reason. - Named for a real-world optic which has saved countless lives by its use in lighthouses around the world. Best regards, Rob