diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..bf97533
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/index"]
+	path = lib/index
+	url = git@git.flash.moe:flash/index.git
diff --git a/lib/index b/lib/index
new file mode 160000
index 0000000..f3594a9
--- /dev/null
+++ b/lib/index
@@ -0,0 +1 @@
+Subproject commit f3594a99536bab9e617452007af6a99183cc4d6e