I have no programming knowledge, but I've been trying to get help with artificial intelligence. I showed it all the content the AI ​​requested, but I got stuck on a step. I needed to leave some DLLs as references, in addition to the ones I already had. But I can't find the required DLLs anywhere. They are: gameplay.actors, gameplay.ui... and a few others. I've already extracted all the DLLs from my Gameplay.package, Core.package, and script.package files. Does anyone know where I can find these DLLs?

Are you talking about Sims 4 here? If so, you might like to post in the Sims 4 forums, as this forum is for other games (Inzoi and Paralives and so on).

It's about the sims 3.... my AI asked to search some codes and mechanisms by opening some DLL's in dnSPY. The I openned some (like Sims3.Gameplay.Sistem, Sims3.Gameplay.Objects...). And then the AI, after mounting the code of the mod I was trying to create, said that i had to reference some DLL's that I can't find. The DLL's I have was extracted from gameplay.package, core.package and another that i dont remember. But none of these was the DLL's I need. What can I do?

in that case post here:
https://modthesims.info/f/547/

You'll probably get more people see it in the correct forum.

Thanks bro!!

It sounds like you're working on modding or AI integration for a game. Those specific DLLs (like gameplay.actors and gameplay.ui) usually aren’t available as standalone files — they’re part of the game’s compiled code. You might need to use a decompiler to inspect the game’s assemblies or rely on community modding tools instead. Check if there’s a modding SDK or toolkit released by the developers!