diff --git a/.gitignore b/.gitignore
index 26de804..c7fb5c7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -20,4 +20,6 @@ Thumbs.db
 .vscode/
 *.swp
 backend/klg.db
+
+# Knowledge base (large PDFs from PAPA)
 knowledge/