diff --git a/_config.yml b/_config.yml
index 1abb31549..26d04b22b 100644
--- a/_config.yml
+++ b/_config.yml
@@ -58,5 +58,6 @@ exclude:
   - AGENTS.md
   - CLAUDE.md
   - .bundle
+  - r/wg21
 #   - vendor/gems/
 #   - vendor/ruby/