byorgey:

>    Hi all,
>
>    Here are two patches to the core, one to add an Applicative instance for
>    X, and another which adds a startupHook :: X () to the config.  I wrote
>    them to support updates to PerWorkspace (patch to follow shortly), but I
>    think they're both useful in and of themselves, especially the
>    startupHook.

Can we derive the Applicative instance? (Are applicatives in mtl yet?)