Contacts with the Quantum Gravity Program: Six registered programs and what the dark sector forces

A running comparison of the Projection Framework against programs in quantum gravity and cosmology, kept as a ledger of what is bought, what is left open, and what is not bought. Entries cover the de Sitter conjecture as an opponent to the framework’s coefficient-exact closure of the cosmological constant; the Fermi constraint and Sorkin’s causal-set magnitude as consiliences; gravitational-wave birefringence as a live exposure; the island formula as an unengaged gap; the fixed-background problem as dissolved rather than solved; Turok’s CPT-symmetric universe, with the dark-sector analysis it forces (shared gauge content excluded by Planck’s N_eff at equal temperature; the gapped class-bit branch inside the Bullet Cluster bound; three predictions: no dark radiation, no dark disk, cored halos); Gorard’s multiway systems (convergent on emergent spacetime, divergent on the canonical clock and on the arrow of time); and Weinstein’s 1984 boundary, with anomaly cancellation reformulated as a finite-index extension problem for observable nets. Computations in halo.py, supplement v1.1.0 (doi:10.5281/zenodo.24091965). Includes a terms section defining the framework’s vocabulary and a 39-entry bibliography.