Reproducibility materials and research data for Canonical Ring-Coupled Syndrome Coding for Cost-Adaptive Spatial Steganography

Processed research data and reproducibility materials supporting the manuscript “Canonical Ring-Coupled Syndrome Coding for Cost-Adaptive Spatial Steganography”. The deposit contains frozen split identifiers, random seeds, protocol and environment manifests, encoder self-tests, Phase-A coupling-dimension and matrix-seed sensitivity artifacts, held-out distortion results, SRMQ1+FLD steganalysis outputs, learned-cost validation artifacts, and the completed frozen SiaStegNet/KeNet robustness experiment including uncoupled, coupled, and STC test predictions. Raw BOSSBase images are not redistributed and must be obtained separately subject to the benchmark distribution terms. The deep experiment used the official SiaStegNet/KeNet architecture at repository commit 592d9e13f39f287d9c675f1b89272bcfb6a9627c. The deposit includes machine-readable result tables and integrity hashes supporting independent numerical auditing of the reported results.