B8-GC: Reproducible code for a gastric differentiation axis marking metastatic dedifferentiation in gastric cancer

Release v1.0.0 of the reproducible B8-GC analysis code accompanying the manuscript “A reproducible gastric differentiation axis marks metastatic dedifferentiation in gastric cancer.” The archive includes frozen signatures, sanitized analysis pipelines, source-table and figure export utilities, a fully synthetic demonstration, tests, environment specifications, provenance documentation, and SHA-256 checksum manifests. No real cohort data are bundled. Source repository: https://github.com/jiajunluo430-creator/b8-gc