diff --git a/.gitignore b/.gitignore
index 7ecdc42..af431cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,5 +34,9 @@ Testing/
 doc/doxygen/
 *.dox.tmp
 
-# Downloaded research papers (large PDFs, not tracked)
+# Downloaded research papers + derived artifacts (regenerable, not tracked)
 papers/*.pdf
+papers/txt/
+papers/mmd/
+papers/facebook/
+papers/figures/