diff --git a/.github/workflows/repo-lockdown.yml b/.github/workflows/repo-lockdown.yml
--- a/.github/workflows/repo-lockdown.yml
+++ b/.github/workflows/repo-lockdown.yml
@@ -2,6 +2,11 @@
 on:
   pull_request_target:
     types: opened
+    paths-ignore:
+      - 'libcxx/**'
+      - 'libcxxabi/**'
+      - 'libunwind/**'
+      - 'runtimes/**'
 
 permissions:
   pull-requests: write