Initial commit: DPM core library, CLI, bundled info module, and tests

include/internal/modules.hpp

@@ -0,0 +1,74 @@
+/**
+ * @file modules.hpp
+ * @brief Module handle, cursor, and loader declarations
+ *
+ * @copyright Copyright (c) 2026 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/>.
+ */
+#pragma once
+
+#include <dpm/core.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+/** @brief A loaded, fully validated module */
+struct dpm_module {
+    std::string name;
+    void*       handle = nullptr;
+    std::string version;
+    std::string description;
+    std::string core_min;
+    const dpm_manifest* manifest = nullptr;
+    int (*execute)(dpm_ctx*, const char*, int, char**) = nullptr;
+};
+
+/** @brief Enumeration cursor over validated modules */
+struct dpm_cursor {
+    std::vector<dpm_module_info> infos;
+    size_t idx = 0;
+};
+
+/**
+ * @brief Closes a dlopen handle
+ *
+ * Keeps handle release beside the loader in one translation unit.
+ *
+ * @param handle The handle to close; NULL is a no-op
+ */
+void dpm_internal_unload(void* handle);
+
+namespace dpmcore {
+
+/**
+ * @brief Runs the full load-time validation sequence against a module
+ *
+ * Loads the named module's .so from the context's module path and
+ * verifies the complete contract.
+ *
+ * @param ctx The core context
+ * @param name The module name
+ * @param reason Receives the refusal reason on failure
+ * @return The validated module (caller owns), or nullptr on failure
+ */
+std::unique_ptr<dpm_module> validate_and_load(dpm_ctx* ctx,
+                                              const std::string& name,
+                                              std::string& reason);
+
+} // namespace dpmcore