At ZuriHac 2019 Matthew Pickering talked about tools for working on GHC. There’s an associated blog post which is also well worth reading. I wanted to focus on a small part of his presentation, which is about loading GHC into GHCi and using ghcid to automatically reload GHC on changes. This has been possible for almost a year now, as described in this blog post by Michael Sloan. It has since been