diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..628e418
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "third_party/dyad"]
+	path = third_party/dyad
+	url = https://github.com/dyad-sh/dyad.git
diff --git a/README.md b/README.md
index a28382b..46567e5 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,17 @@
-# saas
\ No newline at end of file
+# saas
+
+## Submodules
+
+This repository contains Git submodules. After cloning, initialize and update submodules with:
+
+```bash
+git submodule update --init --recursive
+```
+
+### third_party/dyad
+
+- **Source Repository:** https://github.com/dyad-sh/dyad.git
+- **Path:** `third_party/dyad`
+- **License:** Apache License 2.0 (see `third_party/dyad/LICENSE`)
+
+The dyad submodule is included for integration with this project.
diff --git a/third_party/dyad b/third_party/dyad
new file mode 160000
index 0000000..fadfbc0
--- /dev/null
+++ b/third_party/dyad
@@ -0,0 +1 @@
+Subproject commit fadfbc06be8d08efcd0e12a366c881c4df5c9086