diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..67b3c45
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "styleguide"]
+	path = styleguide
+	url = https://github.com/google/styleguide.git
diff --git a/AGENTS.md b/AGENTS.md
index 3a00a12..30b30ae 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -13,6 +13,9 @@ Before committing changes, run `make test`. The tests must pass.
 
 ## Backend/Golang
 
+Read the style guide, it can be found at styleguide/go/.
+Make sure the git submodules are loaded.
+
 Do not alter go.mod directly, instead, use the CLI tools `go mod tidy`, `go mod
 init`, and so forth.
 
diff --git a/styleguide b/styleguide
new file mode 160000
index 0000000..c098353
--- /dev/null
+++ b/styleguide
@@ -0,0 +1 @@
+Subproject commit c098353acb6d8ee2dcf995e2e2ae67cf35afe30d