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From the documentation it is unclear to me how you could do anything else than do a line-by-line transformation of the input, because the only way of handling input is by means of the line handler, which can only handle a single independent line.
E.g. how would you write a program that sums all the input lines with a number and prints the result?

Hello! Firstly, thank you for this package - it's wonderful. Secondly, I've hit a wall, and I think it's because of asynchronous impurities. I wanted to write this little function, withInterface, to tidy up some of my logic:

withInterface :: forall a . (Interface -> Program a) -> Program a
withInterface f = do
  interface <- createConsoleInterface noCompletion
  result    <- f interface

  close interface
  pure result

The problem is that writing something like withInterface $ \interface -> prompt interface will show a prompt and immediately close it. Presumably, this is because close interface runs before I have time to type anything into the prompt. I'm pretty new to PureScript, but is this something that could be solved with the help of Aff?

Sorry, I think/hope I answered my own question, but I'm hoping I can work to build something to allow this :) Thanks!

I'm going to work on the PR