I've recently seen many tools for Haskell IDE backend

such as ghc-mod, hsdev, haskell-ide-engine, ide-backend, and intero.

In addition, I found GHCi added commands to support IDEs: :complete, :type-at, etc.

Then, I heard intero is a fork of GHCi.

Actually intero's commands look same with GHCi's.

So, what does intero add to GHCi?

Thanks in advance.
--