Hi!
So, I have Prismatic Tools and Automate installed and just discovered that Automate doesn't automatically put Prismatic Shards into the Furnace. Made a quick video on this:

Also, on Lookup Anything on inspecting the Furnace the Prismatic Bars "recipe" doesn't show there:

Hi! Due to how machines work in the game, Automate can't recognize custom recipes added to the vanilla machines by default. Prismatic Tools need to would register its custom recipes with Automate in its code.