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diff --git a/indra/newview/rlvcommon.h b/indra/newview/rlvcommon.h
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+++ b/indra/newview/rlvcommon.h
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+/**
+ * @file rlvcommon.h
+ * @author Kitty Barnett
+ * @brief RLVa helper functions and constants used throughout the viewer
+ *
+ * $LicenseInfo:firstyear=2024&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2024, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#pragma once
+
+#include "rlvdefines.h"
+
+namespace Rlv
+{
+    // ============================================================================
+    // RlvStrings
+    //
+
+    class Strings
+    {
+    public:
+        static std::string        getVersion(bool wants_legacy);
+        static std::string        getVersionAbout();
+        static std::string        getVersionImplNum();
+        static std::string        getVersionNum();
+    };
+
+    // ============================================================================
+    // RlvUtil
+    //
+
+    namespace Util
+    {
+        bool isValidReplyChannel(S32 nChannel, bool isLoopback = false);
+        void menuToggleVisible();
+        bool parseStringList(const std::string& strInput, std::vector<std::string>& optionList, std::string_view strSeparator = Constants::OptionSeparator);
+        bool sendChatReply(S32 nChannel, const std::string& strUTF8Text);
+        bool sendChatReply(const std::string& strChannel, const std::string& strUTF8Text);
+    };
+
+    inline bool Util::isValidReplyChannel(S32 nChannel, bool isLoopback)
+    {
+        return (nChannel > (!isLoopback ? 0 : -1)) && (CHAT_CHANNEL_DEBUG != nChannel);
+    }
+
+    inline bool Util::sendChatReply(const std::string& strChannel, const std::string& strUTF8Text)
+    {
+        S32 nChannel;
+        return LLStringUtil::convertToS32(strChannel, nChannel) ? sendChatReply(nChannel, strUTF8Text) : false;
+    }
+
+    // ============================================================================
+}