diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..e07df57
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "io/io"]
+	path = io/io
+	url = git@blackmark.me:BlackMark/io.git
diff --git a/io/io b/io/io
new file mode 160000
index 0000000..82a6b17
--- /dev/null
+++ b/io/io
@@ -0,0 +1 @@
+Subproject commit 82a6b179df401c440822e2abb6d421ff0e4a0e4b