TLDR: This mod allows you to steal an enemies vassal if you manage to occupy 75% of the vassals planets during a war.

In the late game, wars often become quite big and quite tedious when you battle against multiple enemies in a federation or an overlord swarm. The win condition of these large scale conflicts is especially gnarly, often requiring you to completely occupy multiple enemies to gain any meaningful reward. This mod tries to alleviate this issue by enabling the player to steal enemy vassals through occupation of just the vassal itself, which enables some smaller scale rewards, even if the overall war doesn't end in a total victory.

- Triggers on any war goal on status quo or victory

- Must have at least 75% of the vassals planets occupied by you or your allies

- Vassal is transferred to the empire who occupies the most planets with occupied systems acting as a tie breaker
(subjects planets/systems count towards their overlords score)

- AI can also steal your subjects, make sure to defend them

Not implemented yet: Custom tooltip to show whether you steal any vassals before ending the war. Afaik I would need to overwrite every single war goal to make this happen, which is annoying. Let me know if you know of a better solution for this, I am still new to modding.

Credits
Korean - by The Engineer Pop