SillyTavern NPC extension turns games into RP worlds

The smartest part is the split: let one model write the scene, then let a tiny structured-output model handle the boring glue. That keeps the roleplay fluid while making the game integration deterministic enough to be usable.

• –Feeding a full wiki plus real-time player and world data gives NPCs context most game-AI demos never reach.
• –The second-pass router is the real engineering trick; it should be cheaper and more reliable than asking the RP model to emit perfect tool calls.
• –Local-only deployment should help latency and privacy, but it also raises the hardware and integration bar for normal players.
• –Automatic voice cloning is a strong differentiator if it stays robust across different game asset pipelines and NPC sets.