Interuniversal Expedition: From Concept to Protocols Programmatic Article for the "Practical IDM" Series

This programmatic article launches the "Practical IDM" series, dedicated to the engineering exploration of the Infinite-Dimensional Multiverse Model (IDM). The series is not science fiction in the classical sense — it is a technical‑fictional prototype, a thought experiment at the edge of the possible, strictly following IDM postulates and grounded in realistic estimates of energies, distances, and risks. The original question was civilizational: can an Earth‑type civilization evolve to the 4th form of matter (cosmotheurgic) before its star becomes a red giant? Analysis showed the probability is extremely low. Therefore, if agents of the 4th form exist, they most likely arose independently — through quantum breakthroughs or expansion from other universes. This is how interest in inter‑universal transition mechanisms emerged. The physical foundation (IDM, branes, interference vacuum, attractors) has already been developed. However, physics does not answer questions about behavior upon contact, reality verification, or secure communication channels. The answers became the content of the "Long‑Range Reconnaissance Protocols (version 2.2)", to be examined in subsequent articles. The series plan includes eight articles: from breakthrough geometry and navigation to universe classification, encounter protocols, artifacts, reverse infiltration, and social consequences. The aim of the series is to prepare the mind for the idea that the multiverse is not an abstraction but an environment with its own physical laws, risks, and opportunities.