diff --git a/web/src/engine/keyboard-cache/src/stubAndKeyboardCache.ts b/web/src/engine/keyboard-cache/src/stubAndKeyboardCache.ts
index 01a10bf930..c71ad88e95 100644
--- a/web/src/engine/keyboard-cache/src/stubAndKeyboardCache.ts
+++ b/web/src/engine/keyboard-cache/src/stubAndKeyboardCache.ts
@@ -29,6 +29,10 @@ export {withoutPrefix as toUnprefixedKeyboardId};
 interface EventMap {
   /**
    * Indicates that the specified stub has just been registered within the cache.
+   *
+   * Note for future hook:  establish a listener for this event during engine init
+   * to denote the first added stub to facilitate auto-activation of the first
+   * keyboard to be registered.
    */
   stubAdded: (stub: KeyboardStub) => void;