error handling layer implemented, header boilerplated for licensing info

include/module_interface.hpp

@@ -1,3 +1,33 @@
+/**
+* @file module_interface.hpp
+* @brief Defines the interface for DPM modules
+*
+* Establishes the required symbols and common interface that all DPM modules
+* must implement to be loadable and executable by the core DPM system.
+* This forms the contract between the main DPM application and its modules.
+*
+* @copyright Copyright (c) 2025 SILO GROUP LLC
+* @author Chris Punches <chris.punches@silogroup.org>
+*
+* Part of the Dark Horse Linux Package Manager (DPM)
+*
+* This program is free software: you can redistribute it and/or modify
+* it under the terms of the GNU Affero General Public License as
+* published by the Free Software Foundation, either version 3 of the
+* License, or (at your option) any later version.
+*
+* This program is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU Affero General Public License for more details.
+*
+* You should have received a copy of the GNU Affero General Public License
+* along with this program. If not, see <https://www.gnu.org/licenses/>.
+*
+* For bug reports or contributions, please contact the dhlp-contributors
+* mailing list at: https://lists.darkhorselinux.org/mailman/listinfo/dhlp-contributors
+*/
+
 #pragma once
 #include <string>
 #include <vector>