diff --git a/tools/build_yaml_code_coverage_v1.py b/tools/build_yaml_code_coverage_v1.py
index 9041f50..bffcb29 100644
--- a/tools/build_yaml_code_coverage_v1.py
+++ b/tools/build_yaml_code_coverage_v1.py
@@ -161,6 +161,7 @@ def main() -> int:
         "rows": rows,
     }
 
+    out_path.parent.mkdir(parents=True, exist_ok=True)
     out_path.write_text(json.dumps(result, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")
     print(
         f"[YAML_TO_CODE_COVERAGE_V1] total={len(all_spec_ids)} "