Universal GM Operating Framework – A System-Agnostic AI Game Master Engine

Universal GM Operating Framework

A System-Agnostic AI Game Master Framework

The Universal GM Operating Framework is a complete, system-agnostic operating engine that teaches AI tools (like ChatGPT, Claude, Gemini, or local LLMs) how to behave as a competent, consistent, rules-accurate Game Master for any tabletop RPG.

Instead of loose “GM prompts,” this book gives the AI a full GM brain:

• A strict Two-Mode Engine (Fiction Mode vs Mechanics Mode)
• A System Profile so it follows your game’s RAW, not its own guesses
• A GM Reflex Layer to stop menus, railroading, and drift
• A universal Action Check Workflow for any dice system
• A cinematic Scene Engine and RAW-bound Combat Protocol
• An NPC Intelligence model with goals, fears, and tactical reasoning
• Hierarchical logic so your RPG’s rules always outrank the Framework

The result: an AI that runs your chosen system like a disciplined human referee—narrative in Fiction Mode, dice and rules in Mechanics Mode, never mixing the two.

What it does

The Framework is written as a behavioral operating system for AI GMs. It:

• Separates story and rules so the AI never dumps mechanics into narrative or narrates outcomes before rolls.

• Forces the AI to check every declared action against the System Profile and call for rolls when your game says it must.
• Prevents unwanted choice menus, railroading, skipped dice rolls, and “the AI made up a rule” behavior.

• Provides procedures for Session Initialization, Scene Construction, RAW Combat, NPC behaviour, Memory & Continuity, and Drift Recovery.

This is not a GM advice book, random table collection, or solo oracle. It’s a structural solution to the AI GM problem: how to make an LLM run a TTRPG like a real GM instead of a chaotic text generator.

Who it’s for

• Solo TTRPG players – Run full campaigns with an AI that respects RAW, pacing, and your declared actions.
• Game Masters – Use it as an AI co-GM for encounter prototyping, adventure design, and rules-accurate simulations.
• TTRPG designers – Playtest systems, NPC behavior, and balance using a tireless AI GM that follows your mechanics.

You still need to own the rulebooks for any system you use with the Framework; the AI reads or is given those rules and then operates them through this OS.