1 files changed, 3 insertions, 0 deletions
diff --git a/csolver.go b/csolver.go
index af4328b..3766ca4 100644
--- a/csolver.go
+++ b/csolver.go
@@ -1,3 +1,6 @@
+// SPDX-License-Identifier: AGPL-3.0-only
+// SPDX-FileCopyrightText: Copyright (c) 2025 Runxi Yu <https://runxiyu.org>
+
 package main
 
 const solverProgram = `