Tier A full closure scaffold landed. 13 EC files (admit 0/0) + 5 Lean ↔ EC bridges + Jasmin CT (lib/rlwe/threshold) + dudect harness (Verify + Combine, arm64 + x86_64) + e2e + fuzz + 7-gate CI orchestrator. APPROVED WITH ROADMAP GATES. Open: GATE-3b dudect 10⁹ pinned CPU run, GATE-4 external audit, GATE-5 Jasmin extraction filling byte-walk axioms — all v0.8.0.