diff --git a/.github/workflows/sync-main-master.yml b/.github/workflows/sync-main-master.yml
new file mode 100644
index 0000000..30558b5
--- /dev/null
+++ b/.github/workflows/sync-main-master.yml
@@ -0,0 +1,13 @@
+name: Sync Main-Master
+on:
+  push: { branches: main }
+  workflow_dispatch:
+
+# One-time commands for users to switch-over:
+# ```sh
+# git branch -m master main; git fetch origin; git branch -u origin/main main; git remote set-head origin -a
+# ```
+
+jobs:
+  sync:
+    uses: nodenv/.github/.github/workflows/sync-main-master.yml@v2