FlowGuard v0.68.16 is a source-only direct-current release. It adds exact lexical/import reverse implementation-surface discovery, bidirectional model-to-surface closure, full-versus-merged call-graph conservation, compact current layout auditing, lightweight storage checks, and route-scoped template seeds. The frozen release validation passed all 10 required owners (including the full pytest suite and 51 model regressions); no compatibility reader, fallback authority, wheel, source archive, or release asset is included.