From Openkore Wiki
If you have the Arrow Crafting Skill, Kore can automatically craft arrows for you. If the option autoMakeArrows in config.txt is enabled, you can list items in the file arrowcraft.txt to make Kore automatically create arrows using the specified items.
The format of this file is simply a set of lines that observes the following syntax:
<item name> <use flag>
- <item name>
- Using the Arrow Crafting Skill, different type of arrows can be created from different ingredients. This value specifies the name of the item that you want to use as an ingredient when creating arrows.
- <use flag>
- This is a boolean that specifies whether the item will be used to create certain arrows.
This will allow Kore to create Fire Arrows and Iron Arrows from Red Blood and Garlet, respectively.
Red Blood 1 Garlet 1