diff --git a/.gitignore.in b/.gitignore.in
index 9f05eff8d..9f20a8d3f 100644
--- a/.gitignore.in
+++ b/.gitignore.in
@@ -57,3 +57,4 @@ Thumbs.db
 /tools/claude/build_output.txt
 /tools/claude/patch_analysis.txt
 /tools/claude/patch_output.txt
+__pycache__