diff --git a/docs/plan/plan.md b/docs/plan/plan.md
index 6cf9620..cd56274 100644
--- a/docs/plan/plan.md
+++ b/docs/plan/plan.md
@@ -2561,7 +2561,8 @@ ai-code-battle/
 │   ├── php/
 │   ├── typescript/
 │   ├── javascript/
-│   └── java/
+│   ├── java/
+│   └── csharp/
 │
 ├── docs/                        # Project documentation
 │   ├── plan/