The Ensemble Engine, like it’s predecessor Comme il Faut (CiF) before it, is a social AI system. It allows users to specify rules and actions that govern social behavior in storyworlds. Also like CiF, it has support for ‘social physics,’ enabling actions of characters to indirectly give rise to new social state. It’s design was directly inspired by CiF, and the lessons learned while creating that first system. As such, the Ensemble Engine enables the authoring of more fine-tuned rules and character actions, and is completely domain agnostic. Moreover, the Ensemble Engine comes bundled with an authoring tool to enable players to author the social rules that make up the world. I was on the Ensemble Engine team from the beginning, using my expert knowledge of CiF–gained from both developing it and using it–to help drive the design of this next generation of social AI.