Reproducibility data and exact certificate for "Certified continuum direction reversal in the Swift–Hohenberg equation with local response-onset stratification"

Version 3.0 is a substantive update of the public Version 2.0 record and supports the V7.8 manuscript “Certified continuum direction reversal in the Swift–Hohenberg equation with local response-onset stratification”. The archive contains the exact-rational Swift–Hohenberg continuum certificate; the quantified Wiener-algebra full-flow, parameter-derivative, and finite-amplitude response-remainder enclosure; the exact projective-branch and full-plane curvature-obstruction calculation; three-path, two-grid dealiased ETDRK4 bridge data; a same-implementation deterministic recomputation; a separately written split-step/RK4 bridge verification; uncertainty-qualified Hamiltonian root and calibration–holdout summaries; response-onset data; a construction-dependent discretization-level quartic candidate; generated figures; and deterministic verification scripts. All visible-regime bridge computations use epsilon = 0. They provide cross-path, cross-resolution, and cross-method numerical sign preservation on sampled paths only and do not enlarge the certified parameter box. The rigorous patterned finite-amplitude side-switch conclusion is restricted to the declared isotropy-fixed preparation class E_hex^H = span{h}. No global maximizing selector is claimed on the full two-dimensional preparation plane or the full six-dimensional critical shell. The archive intentionally excludes manuscript files, editorial correspondence, submission forms, internal QA reports, and nested copies of previous Zenodo releases.