Accessibility Geometry Reference Stack: Reference C - Relational and Coupling Variable Register

Accessibility Geometry Reference Stack — Reference C: Relational and Coupling Variable Register v0.3 defines the relational and coupling layer of the Accessibility Geometry framework. Where Reference A — Accessibility Variable Register defines the primary observer-state variables, and Reference B — Accessibility Derivative Register defines derivative behavior, warning trajectories, compound collapse signatures, recovery signatures, and preliminary Human TAWS logic, Reference C asks a different question: How do observer-systems relate to one another? This register introduces a controlled vocabulary for modeling the relational field in which observer-systems transmit information, form or lose trust, distort meaning, synchronize across scales, preserve or degrade shared interpretive structure, and influence one another’s accessibility landscapes. Core relational and coupling variables include: Shared Geometry — SG(t) Trust — Tr(t) Perceived Observer Value — POV(t) Geometric Cohesion — GC(t) Information Acquisition Cost — C_info(t) Observer Coupling — K_ij(t) Relational Impedance — eta_ij(t) Stewardship Responsibility — SR(t) Reference C also defines provisional relational collapse and repair signatures. Collapse signatures include Trust Collapse, Shared Geometry Fracture, Observer Erasure, Coercive Coupling, Stewardship Failure, Relational Impedance Spiral, Relational Isolation Drift, and False Relational Coherence. Repair signatures include Trust Rebuilding, Shared Geometry Restoration, Observer Re-Recognition, Healthy Decoupling, Stewardship Restoration, Relational Impedance Reduction, Relational Re-Coupling, and Corrective Dissent Integration. The central contribution of Reference C is the recognition that accessibility is not only internal to an observer. It is also shaped by the relational field in which the observer is embedded. An observer’s accessible futures may expand or contract depending on trust, shared geometry, observer coupling, relational impedance, perceived observer value, information acquisition cost, geometric cohesion, and stewardship responsibility. This document remains exploratory. The variables and signatures introduced here are not clinical diagnostic tools, legal standards, moral scoring systems, institutional decision authorities, or validated empirical predictors. They are provisional modeling constructs intended to support future simulation, calibration, Human TAWS refinement, Multi-Scale Observer Dynamics research, and responsible applied use under forthcoming application-declaration discipline. Keywords Accessibility Geometry; Reference C; Relational Coupling; Shared Geometry; Trust; Perceived Observer Value; Geometric Cohesion; Information Acquisition Cost; Observer Coupling; Relational Impedance; Stewardship Responsibility; Observer Systems; Multi-Scale Observer Dynamics; Human TAWS; Relational Collapse; Relational Repair; Trust Collapse; Shared Geometry Fracture; Observer Erasure; Coercive Coupling; Stewardship Failure; Relational Impedance Spiral; Relational Isolation Drift; False Relational Coherence; Corrective Dissent Integration; Future-State Navigation; Accessibility Landscapes; Systems Theory; Cybernetics; Coherence Dynamics Laboratory; Logical Aliveness; Substrate-Specific Modeling; Observer-State Modeling