diff --git a/.gitignore b/.gitignore
index 236a2c0c..3c370ddf 100644
--- a/.gitignore
+++ b/.gitignore
@@ -57,3 +57,6 @@ docs/.vitepress/cache
 
 # Claude Project Knowledge sync output (regenerated by scripts/sync-claude-docs.sh)
 .claude-sync/
+
+# Claude Code runtime state
+.claude/*.lock