refactor: add to template agent roles

sources/common/CMakeLists.txt

@@ -2,6 +2,7 @@ add_library(Common INTERFACE)
 
 target_sources(Common INTERFACE
     ContextData.hpp
+    ResponseCleaner.hpp
 )
 
 target_include_directories(Common INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})

sources/common/ResponseCleaner.hpp

@@ -0,0 +1,103 @@
+// Copyright (C) 2025-2026 Petr Mironychev
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Additional attribution terms under GPLv3 §7(b) apply — see LICENSE
+
+#pragma once
+
+#include <QString>
+#include <QStringList>
+#include <QRegularExpression>
+
+namespace QodeAssist {
+
+class ResponseCleaner
+{
+public:
+    static QString clean(const QString &response)
+    {
+        QString cleaned = removeCodeBlocks(response);
+        cleaned = trimWhitespace(cleaned);
+        cleaned = removeExplanations(cleaned);
+        return cleaned;
+    }
+
+private:
+    static QString removeCodeBlocks(const QString &text)
+    {
+        if (!text.contains("```")) {
+            return text;
+        }
+
+        QRegularExpression codeBlockRegex("```\\w*\\n([\\s\\S]*?)```");
+        QRegularExpressionMatch match = codeBlockRegex.match(text);
+        if (match.hasMatch()) {
+            return match.captured(1);
+        }
+
+        int firstFence = text.indexOf("```");
+        int lastFence = text.lastIndexOf("```");
+        if (firstFence != -1 && lastFence > firstFence) {
+            int firstNewLine = text.indexOf('\n', firstFence);
+            if (firstNewLine != -1) {
+                return text.mid(firstNewLine + 1, lastFence - firstNewLine - 1);
+            }
+        }
+
+        return text;
+    }
+
+    static QString trimWhitespace(const QString &text)
+    {
+        QString result = text;
+        while (result.startsWith('\n') || result.startsWith('\r')) {
+            result = result.mid(1);
+        }
+        while (result.endsWith('\n') || result.endsWith('\r')) {
+            result.chop(1);
+        }
+        return result;
+    }
+
+    static QString removeExplanations(const QString &text)
+    {
+        static const QStringList explanationPrefixes = {
+            "here's the", "here is the", "here's", "here is",
+            "the refactored", "refactored code:", "code:",
+            "i've refactored", "i refactored", "i've changed", "i changed"
+        };
+
+        QStringList lines = text.split('\n');
+        int startLine = 0;
+
+        for (int i = 0; i < qMin(3, lines.size()); ++i) {
+            QString line = lines[i].trimmed().toLower();
+            bool isExplanation = false;
+
+            for (const QString &prefix : explanationPrefixes) {
+                if (line.startsWith(prefix) || line.contains(prefix + " code")) {
+                    isExplanation = true;
+                    break;
+                }
+            }
+
+            if (line.length() < 50 && line.endsWith(':')) {
+                isExplanation = true;
+            }
+
+            if (isExplanation) {
+                startLine = i + 1;
+            } else if (!line.isEmpty()) {
+                break;
+            }
+        }
+
+        if (startLine > 0 && startLine < lines.size()) {
+            lines = lines.mid(startLine);
+            return lines.join('\n');
+        }
+
+        return text;
+    }
+};
+
+} // namespace QodeAssist