So, like anything, the available libraries vary, but the important ones score pretty highly. Haddock documentation (like Doxygen) is considered a basic part of

So, like anything, the available libraries vary, but the important ones score pretty highly. Haddock documentation (like Doxygen) is considered a basic part of the job. "cabal test" will run embedded test harnesses. Stackage contains a set of libraries considered to be stable and of sufficient quality that most projects don't need to have qualms about using them. See for instance https://www.stackage.org/haddock/lts-7.10/http-client-0.4.31.1/Network-HTTP-Client.html https://www.stackage.org/haddock/lts-7.10/http-client-0.4.31...