diff --git a/workflow-prepare.sh b/workflow-prepare.sh
new file mode 100755
index 0000000..4d26982
--- /dev/null
+++ b/workflow-prepare.sh
@@ -0,0 +1,8 @@
+#!/bin/bash
+# Workflow prepare script for CI
+# Called by shared GitHub Actions workflow before build/test steps
+
+set -e
+
+# Download ONNX runtime libraries for current platform
+./scripts/download-onnx-libs.sh auto