This research note presents a lightweight and testable framework for exploring the hypothesis of “core–dark matter interaction,” focusing on the signature of phase-trapped volatile release (including water) in the interstellar comet 3I/ATLAS and solar corona behavior. The method is fully mobile-based and relies on open-access data: defining variables (temperature, magnetic field, composition), extracting simple time series, building stepwise diagrams, and cross-referencing spectral–dynamic features (C2 green emission, water lines, ion/dust tail angles). The output includes clear predictions and falsifiability criteria, enabling independent evaluation by the observational community. This framework aims to refine gaps in classical light-based models and offer a practical path to connect theoretical intuition with non-visible, multi-source metrics.