diff --git a/gui/ChatPane.qml b/gui/ChatPane.qml
index cb188b0..98f90fa 100644
--- a/gui/ChatPane.qml
+++ b/gui/ChatPane.qml
@@ -706,7 +706,7 @@ Item {
                             font.pixelSize: 14
                             implicitWidth: 28
                             implicitHeight: 28
-                            onClicked: dbus.react(paneRoot.sessionId, modelData.emoji)
+                            onClicked: dbus.reactTo(paneRoot.sessionId, block.responseId, modelData.emoji)
                             ToolTip.text: modelData.tip
                             ToolTip.visible: hovered
                         }
diff --git a/gui/chatblockmodel.cpp b/gui/chatblockmodel.cpp
index 9cfb5b0..50eb5cb 100644
--- a/gui/chatblockmodel.cpp
+++ b/gui/chatblockmodel.cpp
@@ -64,6 +64,8 @@ QVariant ChatBlockModel::data(const QModelIndex &index, int role) const
         return block.name;
     case ContentRole:
         return block.content;
+    case ResponseIdRole:
+        return block.responseId;
     case SubBlocksRole:
         if (block.cachedContent != block.content) {
             block.cachedSubBlocks = parseSubBlocks(block.content);
@@ -102,6 +104,7 @@ QHash<int, QByteArray> ChatBlockModel::roleNames() const
         {ContentRole, "blockContent"},
         {SubBlocksRole, "subBlocks"},
         {FormattedContentRole, "formattedContent"},
+        {ResponseIdRole, "responseId"},
     };
 }
 
@@ -174,7 +177,8 @@ void ChatBlockModel::updateVisibleWindow()
     for (int i = 0; i < commonCount; ++i) {
         if (m_blocks[i].content != newBlocks[i].content ||
             m_blocks[i].type != newBlocks[i].type ||
-            m_blocks[i].name != newBlocks[i].name) {
+            m_blocks[i].name != newBlocks[i].name ||
+            m_blocks[i].responseId != newBlocks[i].responseId) {
             firstDiff = i;
             break;
         }
@@ -228,7 +232,7 @@ QList<ChatBlock> ChatBlockModel::parseBlocks(const QString &text) const
     QList<ChatBlock> blocks;
     if (text.isEmpty()) return blocks;
 
-    // Block headers: [user], [assistant], [reasoning], [call:name], [tool:name], [error], [info] msg
+    // Block headers: [user], [assistant:id], [reasoning], [call:name], etc.
     static const QRegularExpression headerRe(
         R"(^\[(user|assistant|reasoning|call|tool|error|info)(?::([^\]]*))?\](.*)$)",
         QRegularExpression::MultilineOption);
@@ -280,7 +284,10 @@ QList<ChatBlock> ChatBlockModel::parseBlocks(const QString &text) const
         else if (typeStr == "error")     b.type = ChatBlock::Error;
         else if (typeStr == "info")      b.type = ChatBlock::Info;
 
-        b.name = name;
+        if (b.type == ChatBlock::Assistant)
+            b.responseId = name;
+        else
+            b.name = name;
         b.content = content;
         blocks.append(b);
     }
diff --git a/gui/chatblockmodel.h b/gui/chatblockmodel.h
index 23fd929..1bd3369 100644
--- a/gui/chatblockmodel.h
+++ b/gui/chatblockmodel.h
@@ -18,8 +18,9 @@ struct ChatBlock {
     };
 
     Type type;
-    QString name;    // tool/call name, empty for others
-    QString content; // raw text content
+    QString name;       // tool/call name, empty for others
+    QString responseId; // stable assistant response ID
+    QString content;    // raw text content
     mutable QVariantList cachedSubBlocks; // cached parseSubBlocks result
     mutable QString cachedContent;        // content when subBlocks were cached
 };
@@ -51,6 +52,7 @@ public:
         ContentRole,
         SubBlocksRole,  // QVariantList of sub-block maps
         FormattedContentRole, // pre-formatted HTML for call/tool expanded view
+        ResponseIdRole,
     };
 
     explicit ChatBlockModel(QObject *parent = nullptr);
diff --git a/gui/main-kf5.qml b/gui/main-kf5.qml
index 7102dbc..f9ba6d4 100644
--- a/gui/main-kf5.qml
+++ b/gui/main-kf5.qml
@@ -1531,7 +1531,7 @@ ApplicationWindow {
                             font.pixelSize: 14
                             implicitWidth: 28
                             implicitHeight: 28
-                            onClicked: dbus.react(paneRoot.sessionId, modelData.emoji)
+                            onClicked: dbus.reactTo(paneRoot.sessionId, block.responseId, modelData.emoji)
                             ToolTip.text: modelData.tip
                             ToolTip.visible: hovered
                         }
diff --git a/plasmoid/plugin/olliedbusclient.cpp b/plasmoid/plugin/olliedbusclient.cpp
index 6e4b0fd..5ec51ab 100644
--- a/plasmoid/plugin/olliedbusclient.cpp
+++ b/plasmoid/plugin/olliedbusclient.cpp
@@ -463,6 +463,12 @@ bool OllieDBusClient::react(const QString &sessionId, const QString &emoji)
     return true;
 }
 
+bool OllieDBusClient::reactTo(const QString &sessionId, const QString &responseId, const QString &emoji)
+{
+    m_iface->asyncCall("ReactTo", sessionId, responseId, emoji);
+    return true;
+}
+
 bool OllieDBusClient::interrupt(const QString &sessionId)
 {
     m_iface->asyncCall("Interrupt", sessionId);
diff --git a/plasmoid/plugin/olliedbusclient.h b/plasmoid/plugin/olliedbusclient.h
index 96e7dc3..46db08a 100644
--- a/plasmoid/plugin/olliedbusclient.h
+++ b/plasmoid/plugin/olliedbusclient.h
@@ -54,6 +54,7 @@ public:
     Q_INVOKABLE bool setConfig(const QString &sessionId, const QString &key, const QString &value);
     Q_INVOKABLE bool submit(const QString &sessionId, const QString &prompt);
     Q_INVOKABLE bool react(const QString &sessionId, const QString &emoji);
+    Q_INVOKABLE bool reactTo(const QString &sessionId, const QString &responseId, const QString &emoji);
     Q_INVOKABLE bool interrupt(const QString &sessionId);
     Q_INVOKABLE QStringList listBackends();
     Q_INVOKABLE QStringList listModels(const QString &sessionId);