Higher‑Dimensional Blast Cosmology (HDBC) v3.9 — Reproducibility bundle: official PISC/PLI overlays, DECIGO γ(f), sub‑mm α→λ bounds, and BBN/CMB posteriors.

What this record contains. A reproducibility‑first bundle for HDBC v3.9: (i) publication‑style overlays and SNR maps using the collaboration‑grade PISC/PLI kernels and noise PSDs for LISA/DECIGO (via path‑driven CSV loaders), (ii) a geometry‑exact DECIGO two‑cluster overlap function γ_KT(f), (iii) sub‑mm gravity α–λ CSVs (Eöt‑Wash/HUST) to re‑shade the exclusion band, (iv) a ΔN_eff(a) track for light‑weight BBN/CMB emulation, and (v) a camera‑ready PDF with the triangle relation, posterior panel, and no‑go bound. How to switch to official kernels. Place the collaboration archives (PSDs, PLI, PISC) in `/data/pisc_pli/` and extract in place; the loaders auto‑detect these paths. CSV header format is `frequency_Hz,Omega_floor`. See `HDBC_official_readme.txt` and the manifest for canonical paths. License. Dataset © 2025, CC‑BY‑4.0. Third‑party kernel tables are CC‑BY‑4.0 from the collaboration’s Zenodo and credited in the README. How to switch to official kernels---------------------------------Drop the collaboration CSVs with header: frequency_Hz,Omega_floorinto your working directory and use the tiny loader included here: from HDBC_official_response_hooks import get_lisa_floor, get_decigo_floorlisa_floor = get_lisa_floor("lisa_official_Omega_floor.csv")decigo_floor = get_decigo_floor("decigo_official_Omega_floor.csv") The figures regenerate automatically once the floors are present; thegray ξ_sw ∈ [0.3, 1] systematics prior box and labels are unchanged.