diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..215210b
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/lib_application"]
+	path = lib/lib_application
+	url = https://git.zxq5.dev/OsDev/FoundryOS-lib_application.git
diff --git a/lib/lib_application b/lib/lib_application
new file mode 160000
index 0000000..df1cbd1
--- /dev/null
+++ b/lib/lib_application
@@ -0,0 +1 @@
+Subproject commit df1cbd1170723ad75045052dec5b2641fb154591