Effective Archimedean Stark Theorems over Real Quadratic Fields: Quadratic Support, Shintani Transfer, and CM Descent

Corrected paper and reproducibility archive for unconditional effective identifications of selected one-place archimedean Stark packets over real quadratic fields. The work develops a uniform quadratic-support theorem, an effective Shintani index-two transfer with certified height rigidity, and a cyclic-quartic CM norm bridge. Version 1.1 adds a precise comparison with Roblot's unconditional weak quartic and sextic Stark results and an exact hypothesis audit showing that his sextic theorem applies to four selected order-six ray fields, while RQ-002057 lies outside it because of wild ramification above 3. The record contains the paper and supplement as directly previewable top-level PDF and TeX files, together with a self-checksumming companion archive of exact case data, Arb certificates, correction records, and compact proof-checking programs. Companion archive SHA-256: c91e0bd2432f9c5de70a8c760553c0e012c9a304af7e00fbb59b62faab6401fa.