Boltzmann Solver Implementation for rCVGT Cosmology

This technical note provides a practical implementation guide for incorporating the cosmological sector of the Relativistic Coherent Vacuum Gravity Theory (rCVGT) into Boltzmann solvers such as CLASS and CAMB. The document outlines the relevant background equations, the role of the time-rate field, and the contribution of vacuum coherence to the effective dark-energy sector. It further describes how these components modify the cosmological expansion history and the growth of matter perturbations through an effective gravitational coupling. The note is intended to facilitate numerical implementations of rCVGT for computing cosmological observables including CMB anisotropies, gravitational lensing, and the matter power spectrum. It serves as a technical companion to the corresponding cosmology paper and provides a foundation for future precision tests of the theory.