Is Advanced Contextual Alternates possible?

I am just starting out with FS and am looking for a way to have alternate be automatically typed when having two of the same characters after each other. Like in ‘tool, better and sneeuw’.

Glyphs app does have this option:

But I did not found it yet in FS.

Contextual alternates are not yet part of the feature set. We will hopefully bring them & more in the future (will take a while though).

To bad. This is essential when making handwritten fonts.
Hopefully the developers will find the time to make it some day.