Emergent Vacuum Response Theory: A Testable Framework for Nonequilibrium Electromagnetic Systems and Resonant Cavities

Emergent Vacuum Response Theory (EVRT) is presented as a unified phenomenological framework for investigating whether structured, nonequilibrium electromagnetic systems may exhibit measurable stress-energy redistribution effects under asymmetric boundary conditions. The framework does not claim confirmed anomalous forces or violations of conservation laws. Instead, EVRT is organized as a falsifiable research program integrating theoretical motivation, constraint analysis, numerical simulation, cross-validated predictions, precision experimental protocols, and baseline measurement characterization. This work synthesizes a broader research series into a coherent framework, defines quantitative scaling expectations, and establishes explicit experimental criteria for validation or falsification. Particular emphasis is placed on reproducibility, control-dependent testing, and distinguishing genuine physical signals from known artifacts. The current status of EVRT is assessed, and a clear roadmap is provided for advancing experimental sensitivity and independent verification. The goal is to transition a speculative concept into a structured, testable scientific program.