diff --git a/.github/workflows/format-check.yml b/.github/workflows/format-check.yml
index 5387a8a..3472d99 100644
--- a/.github/workflows/format-check.yml
+++ b/.github/workflows/format-check.yml
@@ -16,7 +16,5 @@ jobs:
         clang-format-version: '17'
         # only check core, embedded base covered internally
         check-path: "Core/"
-        # massive regex to exclude anything CubeMX generated, could require tweaking.  Uses posix extended
-        exclude-regex: "/stm32.*|main.(c|h)|freertos.*|FreeRTOS.*|sys.*|(system|startup)_stm32.*/ig"
         # use the clang-format from embedded base
         format-filepath: "./Drivers/Embedded-Base/clang-format"
diff --git a/Core/.clang-format-ignore b/Core/.clang-format-ignore
new file mode 100644
index 0000000..fab9147
--- /dev/null
+++ b/Core/.clang-format-ignore
@@ -0,0 +1,4 @@
+FreeRTOS*
+stm32*
+sys*
+./Startup/*
\ No newline at end of file