diff --git a/llmcore/CMakeLists.txt b/llmcore/CMakeLists.txt
index fdce389..272a44b 100644
--- a/llmcore/CMakeLists.txt
+++ b/llmcore/CMakeLists.txt
@@ -17,6 +17,8 @@ add_library(LLMCore STATIC
     HttpClient.hpp HttpClient.cpp
     DataBuffers.hpp
     SSEBuffer.hpp SSEBuffer.cpp
+    ITool.hpp
+    IToolsFactory.hpp
 )
 
 target_link_libraries(LLMCore
diff --git a/llmcore/ITool.hpp b/llmcore/ITool.hpp
new file mode 100644
index 0000000..ebe893b
--- /dev/null
+++ b/llmcore/ITool.hpp
@@ -0,0 +1,49 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QJsonObject>
+#include <QObject>
+#include <QString>
+
+namespace QodeAssist::LLMCore {
+
+class ITool : public QObject
+{
+    Q_OBJECT
+
+public:
+    explicit ITool(QObject *parent = nullptr)
+        : QObject(parent)
+    {}
+    virtual ~ITool() = default;
+
+    virtual QString name() const = 0;
+    virtual QString description() const = 0;
+    virtual QJsonObject getDefinition() const = 0;
+    virtual QString execute(const QJsonObject &input = QJsonObject()) = 0;
+
+signals:
+    void toolStarted(const QString &toolName);
+    void toolCompleted(const QString &toolName, const QString &result);
+    void toolFailed(const QString &toolName, const QString &error);
+};
+
+} // namespace QodeAssist::LLMCore
diff --git a/llmcore/IToolsFactory.hpp b/llmcore/IToolsFactory.hpp
new file mode 100644
index 0000000..8f47c13
--- /dev/null
+++ b/llmcore/IToolsFactory.hpp
@@ -0,0 +1,38 @@
+/* 
+ * Copyright (C) 2025 Petr Mironychev
+ *
+ * This file is part of QodeAssist.
+ *
+ * QodeAssist is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * QodeAssist 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with QodeAssist. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <QJsonArray>
+#include <QList>
+
+#include "ITool.hpp"
+
+namespace QodeAssist::LLMCore {
+
+class IToolsFactory
+{
+public:
+    virtual ~IToolsFactory() = default;
+    virtual QList<ITool *> getAvailableTools() const = 0;
+    virtual ITool *getToolByName(const QString &name) const = 0;
+    virtual QJsonArray getToolsDefinitions() const = 0;
+};
+
+} // namespace QodeAssist::LLMCore