diff --git a/internal/check-composite-interop.mjs b/internal/check-composite-interop.mjs
index ec54dc23e..33248dea6 100644
--- a/internal/check-composite-interop.mjs
+++ b/internal/check-composite-interop.mjs
@@ -126,6 +126,7 @@ const LINKS = [
 // Composites whose children deliberately exchange nothing. The reason is printed on every run.
 const NO_LINKS = {
   'stack-demo': 'a demonstration stack: page knobs only; dashboard-plus-grid is the linked version',
+  'poster-design': 'two independent views of the poster templates (Styles, Sizes); neither pane drives the other',
 }
 
 // ── D: late getCurrentInstance() sites already routed to an owner ─────────────────────────────