Constraints on Physical Description from Reconstruction, Meaning, and Comparison

This overview consolidates a coherent series of seven interdependent works that impose minimal, reconstruction-based constraints on physical description in gravitation and cosmology. The project is governed by a single delimiting criterion: a theoretical distinction carries physical meaning if and only if it induces an ineliminable difference in admissible reconstruction. Applied systematically, this criterion restricts the physical status of states, dynamics, observables, explanatory structures, and descriptive language. The component works address these constraints at successive structural levels, ranging from the grammatical conditions of comparison, through the classification of physical meaning, to the admissibility and non-uniqueness of causal reconstruction, and the structural origin of complexity in state-based gravitational description. This overview introduces no new physical claims. Its purpose is strictly organizational: to fix the logical order, internal dependencies, and citation structure of the project, and to delimit the scope of physically meaningf