diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..b423d3f
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "upstream/nanochat"]
+	path = upstream/nanochat
+	url = https://github.com/karpathy/nanochat.git
diff --git a/upstream/nanochat b/upstream/nanochat
new file mode 160000
index 0000000..dc54a1a
--- /dev/null
+++ b/upstream/nanochat
@@ -0,0 +1 @@
+Subproject commit dc54a1a3077cab11d68fac4c5d1cd5c51f5d8c7a