is there a way to detect the known recipe fragments of the Psijik-Ambrosia by the API?
For the dwemer chapters I used the dwemer chapter acheivement, but this does not work in this case, because there is no Psijik-Ambrosia achievement :/
It's not doable because you cannot learn a fragment.
In fact when you got all fragments in your inventory, you right click in one of the 7th, all items disapear and you get the recipe (it can be sold, destroyed) etc.
The Psijic Ambrosia works differently. You don't learn parts of the recipe. You first have to collect all 7 of them in your inventory and then can restore the whole recipe which you can learn like normal recipes.