I was waiting for this question to get asked here. :)

We don't have any official plans, but because we're open source, you can take a look at how we're doing things and think about adding it yourself later on.

We'll have some contributor guidelines up soon. We're going to try to clean up the code and write down a bunch of dev/test guidance this month.

https://github.com/Azure/azure-webjobs-sdk-script/wiki

As this is not a common ask, probably not, but we are open source and take contributions! Take a look at our F# support. This should be a relatively easy integration, you'd just need to pass the code to a command line for Haskell.

It might even be possible to do this with a Batch script today. Just upload the Haskell binary, and have it load a particular file in your functions directory. There's are some Batch templates you can get started with.