How I built a self-hosted AI Gamemaster that actually enforces RPG rules (FastAPI & Vue)

Have you ever wondered if an LLM could actually make a capable Gamemaster? If you have ever tried to play or build a text adventure with a standard AI model, you know the architectural frustration. The AI acts like a hyperactive improv partner. If you type 'I jump over the moon and slay the dragon with a spoon', the model simply hallucinates: 'Yes, you do that.' There is no state management, no constraints, and zero real game mechanics. But what if you combined a deterministic, rule-based RPG en...