diff --git a/external/antithesis-sdk/.clang-format b/external/antithesis-sdk/.clang-format
new file mode 100644
index 00000000000..e871ed18b43
--- /dev/null
+++ b/external/antithesis-sdk/.clang-format
@@ -0,0 +1,3 @@
+---
+DisableFormat: true
+SortIncludes: false