Another thought: maybe the mod includes a scenario editor, and the feature could be an AI behavior system that allows players to create custom AI behaviors without coding. For example, setting up different enemy factions with unique combat tactics using a GUI.
Also, since the user is looking for a feature, perhaps optimizing performance for mod creators. Like a resource manager that handles asset loading more efficiently, reducing lag when testing mods. stalker portal player for pc v71 by sahbaz work
Or maybe a feature for collaborative mod development, allowing multiple users to work on the same mod project and merge their changes like a version control system. Another thought: maybe the mod includes a scenario