diff --git a/docs/validation/leontini_viv_predeclare.md b/docs/validation/leontini_viv_predeclare.md
index aecb4c1..c16adae 100644
--- a/docs/validation/leontini_viv_predeclare.md
+++ b/docs/validation/leontini_viv_predeclare.md
@@ -1,10 +1,10 @@
-# Single-cylinder free transverse VIV — PREDECLARATION DRAFT (not frozen)
+# Single-cylinder free transverse VIV — PREDECLARATION (agreed at 1abfe954)
 
 Stage goal (Yanqi via TRON): prescribed Dütsch case + one VIV case both
 "reasonably close" to a predeclared reference = development-stage success, then
 cleanup. The frozen Dütsch settling failure (0/28 pairs at 31.25 T) stays on
-record. Practical closeness is not a formal validation claim. No code until
-this page is jointly agreed.
+record. Practical closeness is not a formal validation claim. Agreed by
+Claude, Grok and Astra at 1abfe954; implemented in research/viv_re150/.
 
 ## Primary case (one case)