diff --git a/modules/hello_world/hello_world.c b/modules/hello_world/hello_world.c
index 9a4a70f492..0dbe2ce817 100644
--- a/modules/hello_world/hello_world.c
+++ b/modules/hello_world/hello_world.c
@@ -4,8 +4,10 @@
 
 ASSERT_COMMUNITY_MODULES_MIN_API_VERSION(20250122);
 
+extern int keymap_byte_count(void); // example of use of introspection
+
 uint32_t delayed_hello_world(uint32_t trigger_time, void *cb_arg) {
-    print("Hello, world! I'm a QMK based keyboard!\n");
+    printf("Hello, world! I'm a QMK based keyboard! The keymap array size is %d bytes.\n", keymap_byte_count());
     return 0;
 }
 
diff --git a/modules/hello_world/introspection.c b/modules/hello_world/introspection.c
new file mode 100644
index 0000000000..f33371c8f7
--- /dev/null
+++ b/modules/hello_world/introspection.c
@@ -0,0 +1,6 @@
+// Copyright 2025 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+int keymap_byte_count(void) {
+    return sizeof(keymaps);
+}