diff --git a/.gitignore b/.gitignore
index 104d4a82..0c18104e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -91,6 +91,8 @@ debug_*.py
 
 # Claude Code local settings (user-specific permissions)
 .claude/settings.local.json
+# Claude Code runtime session locks (per-session, not content)
+.claude/*.lock
 
 .aider*