Relaxation-Driven Cyclic Cosmology (RDCC) v6.0: Black Hole Bounces as Local CPT-Fixpoints, Full Perturbation Transfer Matrix, and Mirror-Sector Microphysics This major release (v6.0) advances the nonsingular, eternally cyclic RDCC model based on a single effective complex scalar field Φ in a tilted double-well potential (tilt from radiative Coleman–Weinberg corrections). Field relaxation drives dynamic dark energy (w_DE > -1) and eternal expansion-contraction cycles. A CPT-conjugate mirror sector provides cold dark matter and resolves baryon asymmetry (η_B ≈ 6.1×10^{-10}, Ω_DM/Ω_b ≈ 5.38), preserving global CPT symmetry exactly. Key innovations in v6.0:- Black holes as local CPT-symmetric mini-bounces: Interior metric with sectoral leakage of Hawking radiation resolves the information paradox. Testable signatures: QNM echoes and GW anisotropies (LIGO/Virgo).- Full perturbation transfer matrix across the bounce: CPT-matching ensures scale-invariance (n_s ≈ 0.964) and tensor knick structures in GW spectrum (LISA/PTA-testbar).- Refined mirror-sector microphysics: Boltzmann equations for decoupling, precise ΔN_eff 0.1 (CMB-S4/BBN), incorrect η_B or Ω_DM/Ω_b, no 21-cm flattening (SKA/HERA). This version builds on v5.0 (Zenodo 10.5281/zenodo.18307836) and the full RDCC ecosystem (starting from v1.0–v3.0 at https://zenodo.org/records/18204087). Full LaTeX source and code snippets in Appendix. While the core of RDCC remains a structural, timeless framework with fixpoint character, this document explores a dynamical realization of the bounce mechanism to enable concrete, falsifiable predictions. Related documents and the full RDCC ecosystem are available via Zenodo:https://zenodo.org/records/18204087 Michael Lehmannmi.lehmann@gmx.de