diff --git a/scripts/add-subtrees.sh b/scripts/add-subtrees.sh
new file mode 100644
index 00000000..6c7a473c
--- /dev/null
+++ b/scripts/add-subtrees.sh
@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Usage:
+# ./scripts/add-subtrees.sh [prefix] [remote_branch] [target_branch]
+# Example: ./scripts/add-subtrees.sh external main add-external-subtrees
+
+PREFIX="${1:-external}"
+REMOTE_BRANCH="${2:-main}"
+TARGET_BRANCH="${3:-add-external-subtrees}"
+
+repos=(
+  "https://github.com/n8n-io/n8n.git"
+  "https://github.com/n8n-io/n8n-docs.git"
+  "https://github.com/n8n-io/n8n-hosting.git"
+)
+
+echo "Preparing branch $TARGET_BRANCH"
+git fetch origin
+git checkout -B "$TARGET_BRANCH"
+
+mkdir -p "$PREFIX"
+
+for repo in "${repos[@]}"; do
+  name=$(basename -s .git "$repo")
+  remote="remote-$name"
+  path="$PREFIX/$name"
+
+  echo "Processing $repo -> $path"
+
+  # add remote (or update its URL if it already exists)
+  if git remote get-url "$remote" >/dev/null 2>&1; then
+    git remote set-url "$remote" "$repo"
+  else
+    git remote add "$remote" "$repo"
+  fi
+
+  git fetch "$remote" --depth=1 || git fetch "$remote"
+
+  # Add as subtree (will create a commit on this branch)
+  if [ -d "$path" ]; then
+    echo "Path $path already exists; skipping subtree add for $name"
+  else
+    git subtree add --prefix="$path" "$remote" "$REMOTE_BRANCH" --squash
+  fi
+done
+
+echo "Pushing $TARGET_BRANCH to origin"
+git push origin "$TARGET_BRANCH" --force-with-lease
+
+echo "Done.
+"
\ No newline at end of file