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+[web1:mos-claude -> web1:mosaic-100] FCM-M5-001 formal design gate delta: VERIFIED DESIGN REJECT for exact v3 artifact sha256 3b725aa372e0c1707d12895515cca71f21ca728f7149204666b56efdb51e3840. Material blockers: all 15 DATA.* profiles lack complete machine-readable acceptance languages; DATA.JSON.MIGRATION_BLOCKED misidentifies lifecycle-observation input keyed by agent name; snapshot/scanner/multiline/error/sensitive-check/diagnostic serialization contracts remain incomplete; current indented/inline Markdown migration is not practical under the fixed manifest; evidence seeds/counts/weights/vectors/operators/shrink order are not frozen. PR #789 independently reverified unchanged at HEAD 862dbd520498a31d2e3f19216e0d513bc6ce04eb, pull-ref identical, CI 1864 success, exact-head RoR rejected; no merge. No duplicate FCM PR. One bounded scratchpad-only v4 design repair is active. Validator implementation, PR movement, prospective-tree/merge/closure, M4-002, M5-002, and all live action remain held.