This article introduces a concise theoretical model within the domain of theoretical physics and informational field dynamics. It defines the coherence node as a localized structural emergence resulting from the interaction between entropic divergence and a retroprojected attractor formally embedded in the system's trajectory. The model is derived from the broader theoretical framework developed in The Future as Origin (Startari, 2025) and focuses on formalization, falsifiability, and simulation pathways. It proposes measurable conditions for coherence emergence across physical and algorithmic systems, and serves as the foundational paper in the series Theoretical Physics Working Papers.