The Absolute Theory of Complexity A Universal Regime-Based Framework for All Complex Systems

This work introduces the first absolute theoretical reference frame for Complexity Science. Instead of prediction, optimization, or model fitting, it establishes regime invariance as the fundamental organizing principle of all complex systems. The framework applies uniformly across physics, biology, economics, artificial intelligence, social systems, and civilizations, providing a permanent structural lens comparable in role to relativity in physics. Included are: a formal theoretical framework, a one-page universal regime manifesto, and an executable demonstrator validating regime stability across nonlinear systems. This is not a domain-specific model, but a once-for-all reference architecture for understanding, classifying, and governing complexity beyond prediction-centric science.