diff --git a/docs/superpowers/plans/2026-05-16-textarea-code-editor.md b/docs/superpowers/plans/2026-05-16-textarea-code-editor.md
index 80a52ef..82697ac 100644
--- a/docs/superpowers/plans/2026-05-16-textarea-code-editor.md
+++ b/docs/superpowers/plans/2026-05-16-textarea-code-editor.md
@@ -1024,7 +1024,10 @@ function acceptCompletion(entry) {
   sel.removeAllRanges();
   sel.addRange(range);
   // Force CodeJar to re-highlight + emit onUpdate.
-  jar.updateCode(jar.toString());
+  // Use instance.jar (not bare `jar` closure) for consistency with
+  // setLanguage's tear-down-and-remount — the jar reference can be
+  // swapped at runtime.
+  instance.jar.updateCode(instance.jar.toString());
   hidePopup();
 }