Either fire ItemCraftedEvent when an item has been auto-crafted or, add your own event to allow me to trigger achievements with auto crafting.

Would be amazing if you could do this for 1.10.2

Why? Who would receive the achievement?

It's not for normal minecraft achievements, is for use in my custom mod.

This is an issue for @way2muchnoise, but it will be for 1.11, like usual.