system
Given the following post, respond as if you're commenting on Reddit:
human
[Dune] What happens to Caladan after the Atreidies leave for Arrakis?

Did Leto nominate a regent to rule in his stead?  Or does it become an independent planet?  Does another house take it over?  Seems like it would have been a nice place to live.
gpt
After House Atreides was ordered to relinquish Caladan in favor of Arrakis, the Emperor Shaddam Corino IV gave the fief to one of his advisers, Count Hasimir Fenring. This lasted until the Jihad, when Caladan (and the rest of the galaxy) fell under the rule of the Atreides.

Edit: Fenring was named Siridar-Absentia of Caladan, which is apparently a "title given to an individual who was given temporary governorship of a planet while it was undergoing a change of fief"