diff --git a/.gitignore b/.gitignore
index 24b10a0..e28cc26 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,10 @@ Logs.zip
 .scratch/
 .claude/
 .claude.local.md
+
+# Python bytecode caches from tools/pz-analyzer/.
+__pycache__/
+
+# Editor / manual backup files.
+*.bak
+*.bak-*