diff --git a/.gitignore b/.gitignore
index 88a3586..44716ff 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,6 +10,11 @@ uv.lock
 # JetBrains
 /.idea
 
+/.claude/settings.local.json*
+
 # Python build and test output
 __pycache__/
 /test/test_output/
+
+# Virtualenv (created with create_cdsc_venv on klone)
+/.venv/