Index: tools/AgentSim/AgentSimController.cpp
===================================================================
diff -u -r402926738e7394ee2d3dc7add2e6d755f06a289d -r22efa5e0d67f4046f9f91c5c3cab9a0a95d9a17f
--- tools/AgentSim/AgentSimController.cpp	(.../AgentSimController.cpp)	(revision 402926738e7394ee2d3dc7add2e6d755f06a289d)
+++ tools/AgentSim/AgentSimController.cpp	(.../AgentSimController.cpp)	(revision 22efa5e0d67f4046f9f91c5c3cab9a0a95d9a17f)
@@ -11,12 +11,7 @@
  *
  */
 #include "AgentSimController.h"
-#include "LeahiMsgProtoUtils.h"
 
-#include <google/protobuf/descriptor.h>
-#include <google/protobuf/dynamic_message.h>
-#include <google/protobuf/util/json_util.h>
-
 #include <QDebug>
 
 /*!
@@ -96,7 +91,8 @@
         result = _rxMsg.feed(_rxBuf);
         switch (result) {
             case AgentMessage::FeedResult::Complete:
-                handleMessage(_rxMsg);
+                logMessage(_rxMsg.msgId(), _rxMsg.sequence(), _rxMsg.payload());
+                sendAck(_rxMsg.sequence());
                 _rxMsg.reset();
                 break;
             case AgentMessage::FeedResult::HeaderError:
@@ -112,61 +108,6 @@
 }
 
 /*!
- * \brief   AgentSimController::handleMessage
- * \details Decodes a received frame and prints its typed body as JSON, generically
- *          via the protobuf descriptor pool (msgId -> message name -> dynamic parse).
- * \param   msg  The complete AgentMessage frame.
- */
-void AgentSimController::handleMessage(const AgentMessage &msg)
-{
-    const QByteArray payload = msg.payload();
-    logMessage(msg.msgId(), msg.sequence(), payload);
-
-    // Read the Header (field 1, shared by every typed message) to learn the msgId.
-    leahi::messages::Envelope envelope;
-    if (!envelope.ParseFromArray(payload.constData(), payload.size())) {
-        qWarning().noquote() << "AgentSim: could not parse Envelope header — frame dropped";
-        return;
-    }
-    const leahi::messages::Header &header = envelope.header();
-
-    // Identify the concrete message type from the msgId and decode it generically.
-    const std::string &typeName = leahi::msgIdToProtoName(static_cast<quint16>(header.msgid()));
-    if (typeName.empty()) {
-        qWarning().noquote() << QString("AgentSim: unknown msgId=0x%1 — cannot decode typed body")
-            .arg(header.msgid(), 4, 16, QChar('0'));
-        return;
-    }
-
-    const google::protobuf::Descriptor *desc =
-        google::protobuf::DescriptorPool::generated_pool()->FindMessageTypeByName(typeName);
-    if (desc == nullptr) {
-        qWarning().noquote() << "AgentSim: no descriptor for" << QString::fromStdString(typeName);
-        return;
-    }
-
-    google::protobuf::DynamicMessageFactory factory;
-    std::unique_ptr<google::protobuf::Message> body(factory.GetPrototype(desc)->New());
-    if (!body->ParseFromArray(payload.constData(), payload.size())) {
-        qWarning().noquote() << "AgentSim: could not parse" << QString::fromStdString(typeName);
-        return;
-    }
-
-    std::string json;
-    google::protobuf::util::JsonPrintOptions opts;
-    opts.add_whitespace = true;
-    opts.always_print_primitive_fields = true;
-    google::protobuf::util::MessageToJsonString(*body, &json, opts);
-
-    // protobuf renders msgId as a decimal integer; rewrite it as 0x + 4-digit hex.
-    QString jsonStr = QString::fromStdString(json);
-    jsonStr.replace(QString("\"msgId\": %1").arg(header.msgid()),
-                    QString("\"msgId\": \"0x%1\"").arg(header.msgid(), 4, 16, QChar('0')));
-    qDebug().noquote() << QString::fromStdString(typeName) << ":" << Qt::endl
-                       << jsonStr;
-}
-
-/*!
  * \brief   AgentSimController::logMessage
  * \details Logs the message identifier, sequence number, and payload length.
  * \param   msgId     Message identifier from the parsed frame.
@@ -180,3 +121,19 @@
                              .arg(sequence)
                              .arg(payload.size());
 }
+
+/*!
+ * \brief   AgentSimController::sendAck
+ * \details Builds an Ack frame carrying \p sequence and writes it to the client socket.
+ * \param   sequence  Sequence number to echo back in the Ack frame.
+ */
+void AgentSimController::sendAck(quint16 sequence)
+{
+    if (!_client || _client->state() != QLocalSocket::ConnectedState) {
+        return;
+    }
+    const QByteArray frame = AgentMessage::build(AgentMessage::MsgId::Ack, sequence);
+    _client->write(frame);
+    _client->flush();
+    qInfo().noquote() << QString("AgentSim: tx  MsgId=Ack  seq=%1").arg(sequence);
+}
Index: tools/AgentSim/AgentSimController.h
===================================================================
diff -u -r402926738e7394ee2d3dc7add2e6d755f06a289d -r22efa5e0d67f4046f9f91c5c3cab9a0a95d9a17f
--- tools/AgentSim/AgentSimController.h	(.../AgentSimController.h)	(revision 402926738e7394ee2d3dc7add2e6d755f06a289d)
+++ tools/AgentSim/AgentSimController.h	(.../AgentSimController.h)	(revision 22efa5e0d67f4046f9f91c5c3cab9a0a95d9a17f)
@@ -52,8 +52,8 @@
     void onReadyRead();
 
 private:
-    void handleMessage(const AgentMessage &msg);
     void logMessage(AgentMessage::MsgId msgId, quint16 sequence, const QByteArray &payload);
+    void sendAck(quint16 sequence);
 
     QSettings _settings;
     QLocalServer _server;
Index: tools/AgentSim/CMakeLists.txt
===================================================================
diff -u -r3812ced8d021e9857d73d3c00a6ea3bcfa6d1026 -r22efa5e0d67f4046f9f91c5c3cab9a0a95d9a17f
--- tools/AgentSim/CMakeLists.txt	(.../CMakeLists.txt)	(revision 3812ced8d021e9857d73d3c00a6ea3bcfa6d1026)
+++ tools/AgentSim/CMakeLists.txt	(.../CMakeLists.txt)	(revision 22efa5e0d67f4046f9f91c5c3cab9a0a95d9a17f)
@@ -5,8 +5,8 @@
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
-set(CMAKE_AUTOMOC ON)
 set(CMAKE_DISABLE_IN_SOURCE_BUILD ON)
+set(CMAKE_AUTOMOC ON)
 
 set(TOOLS_BIN ${CMAKE_CURRENT_SOURCE_DIR}/../bin)
 file(MAKE_DIRECTORY ${TOOLS_BIN})
@@ -36,8 +36,11 @@
 
 set_target_properties(${PROJECT_NAME} PROPERTIES
     RUNTIME_OUTPUT_DIRECTORY ${TOOLS_BIN}
+    ADDITIONAL_CLEAN_FILES ${TOOLS_BIN}
 )
 
 install(TARGETS ${PROJECT_NAME}
+    BUNDLE  DESTINATION .
     RUNTIME DESTINATION ${TOOLS_BIN}
+    LIBRARY DESTINATION ${CMAKE_CURRENT_SOURCE_DIR}/lib
 )