diff --git a/.story_kit/.gitignore b/.story_kit/.gitignore
index 48fb904..a151743 100644
--- a/.story_kit/.gitignore
+++ b/.story_kit/.gitignore
@@ -17,3 +17,6 @@ work/4_merge/
 
 # Coverage reports (generated by cargo-llvm-cov, not tracked in git)
 coverage/
+
+# Token usage log (generated at runtime, contains cost data)
+token_usage.jsonl