haskell-language-server (HLS) is a GHC-oriented implementation of the Language Server Protocol (LSP).
- Generate explicit import lists
- Evaluate code in comments with a click
- Generates class instance stubs
Ghcup can install HLS, but after installation, you'll need to integrate it with an editor. The README.md offers instructions for how to integrate with VSCode/SublimeText/Vim/Neovim/Atom/Emacs. Note that you may also need to add some options in your project configuration. The README also covers that.
In January 2020, Neil Mitchell wrote a blog post launching the project.