Linden Lab just Alpha launched an AI/NPC character builder for Premium Plus Second Life users in collaboration with Convai, the startup that tested out some NPCs in SL earlier this year (to somewhat dubious if comical results). Now they're rolling out an entire toolkit:
The Character Designer provides a solid foundation for immersive roleplay, offering a range of features that let you shape and refine the personalities and behaviors of your inworld characters. Current capabilities include:
Early-Stage Roleplay Support – Characters respond intelligently through IM, adapting and evolving as you interact.
Custom Personalities and Backstories – Define unique histories, preferences, and communication styles to bring your characters to life.
Integration with Existing SL Systems – Connect through a dedicated alt account, set arrival points, and fine-tune behavior filters for a seamless inworld experience.
As this is an alpha release, several improvements are planned:
Expanded Communication – Beyond IM-based interactions, future updates will include local and group chat support.
Voice Integration – Upcoming versions will allow characters to speak, enhancing immersion.
Contextual Awareness – Characters will gain awareness of nearby objects and avatars, enabling more relevant responses.
Advanced Actions – Over time, characters may perform tasks like exchanging inventory items or changing outfits.
Extended Configuration Options – Additional LLM models and Character Designer APIs will provide greater customization and integration possibilities.
More here. To judge by early community response as here on /SecondLife, there's much more consternation, than enthusiasm.
"We already have a problem with a LOT of residents staying logged in and being AFK a majority of the time," as SL author Hari Sutherland just put it to me. "Sim owners place animesh faux people in sims already. Add in NPCs, and the chances of human-to-human interaction, growing community, and forging friendships plummets... it's just statistics."
This is an Alpha launch available only to a few thousand Premium+ users, so we may see these concerns addressed before the official launch.
In the meantime, if you are planning to play with these tools, be careful with what the AI characters you create say. Reddit host Coffee Pancake points out a pretty perilous warning in the documentation, if you uncheck the subject matter filter: