Outline is wrong
Scenes can be marked by a leading dot: .INT? SCENE but the outline view ignores that.
Are your scenes being highlighted properly in the text editor? If so, it looks like https://github.com/superlou/fountain-atom/blob/master/lib/fountain-outline-view.coffee#L158 needs to be updated to match https://github.com/superlou/fountain-atom/blob/master/grammars/fountain.cson#L227.
Is there a way to use the CSON configuration in the view to avoid future duplication?
I think so. This came up back in the legacy preview, since I was duplicating a lot of effort in the CSON and javascript HTML builder. I couldn't find a recommend public API way to get the tokenized text from the editor, but I am confident it has to be there. It's definitely worth some research.
Came across this last time, but it's been a while.