SPEC-1924: AGL Speech Framework's Voice Service High Level 1.0 Release.

Details:
1) Control plugin implementation for VSHL 1.0
2) Exposed APIs that are documented in the confluence page
   https://confluence.automotivelinux.org/display/SPE/Speech+EG+Architecture
3) Implemented 39 unit tests based on GTest framework to test all the low
level components of VSHL binding.
4) Implemented a HTML5 based VSHL API tester application to test VSHL APIs.

API specification:
https://confluence.automotivelinux.org/display/SPE/Speech+EG+Architecture#SpeechEGArchitecture-HighLevelVoiceService

Test performed:
1) Tested AGL service running Alexa Auto SDK https://github.com/alexa/aac-sdk on Ubuntu 16.04 and Renesas R-Car M3 board.

License:
Apache 2.0

Developers/Owners:
Naveen Bobbili (nbobbili@amazon.com)
Prakash Buddhiraja (buddhip@amazon.com)
Shotaro Uchida (shotaru@amazon.co.jp)

Change-Id: I3370f4ad65aff030f24f4ad571fb02d525bbfbca
Signed-off-by: Naveen Bobbili  <nbobbili@amazon.com>

73 files changed, 6520 insertions, 0 deletions

diff --git a/src/plugins/CMakeLists.txt b/src/plugins/CMakeLists.txt
new file mode 100644
index 0000000..06ef7a4
--- /dev/null
+++ b/src/plugins/CMakeLists.txt
@@ -0,0 +1,182 @@
+###########################################################################
+# Copyright 2017-2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+###########################################################################
+
+PROJECT_TARGET_ADD(vshl-api)
+
+    set(CMAKE_CXX_STANDARD 11)
+    set(CMAKE_CXX_STANDARD_REQUIRED ON)
+    set(CMAKE_CXX_EXTENSIONS OFF)
+
+    set(VSHL_LIB_SRC
+        ${CMAKE_CURRENT_SOURCE_DIR}/VshlApi.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/VshlApi.h
+
+        # Interfaces
+        ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/afb/IAFBApi.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/capabilities/ICapability.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/utilities/events/IEventFilter.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/utilities/logging/ILogger.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/voiceagents/IVoiceAgent.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/interfaces/voiceagents/IVoiceAgentsChangeObserver.h
+
+        # AFB
+        ${CMAKE_CURRENT_SOURCE_DIR}/afb/AFBApiImpl.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/afb/AFBApiImpl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/afb/AFBRequestImpl.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/afb/AFBRequestImpl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/afb/include/AFBEventImpl.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/afb/src/AFBEventImpl.cpp
+
+        # VoiceAgents
+        ${CMAKE_CURRENT_SOURCE_DIR}/voiceagents/VoiceAgentsDataManager.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/voiceagents/VoiceAgentsDataManagerImpl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/voiceagents/VoiceAgentEventNames.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/voiceagents/include/VoiceAgent.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/voiceagents/src/VoiceAgentImpl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/voiceagents/include/VoiceAgentEventsHandler.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/voiceagents/src/VoiceAgentEventsHandler.cpp
+
+        # Core
+        ${CMAKE_CURRENT_SOURCE_DIR}/core/VRRequestProcessor.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/core/VRRequestProcessorImpl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/core/include/VRAgentsObserver.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/core/src/VRAgentsObserverImpl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/core/include/VRRequest.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/core/src/VRRequestImpl.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/core/include/VRRequestProcessorDelegate.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/core/src/VRRequestProcessorDelegateImpl.cpp
+
+        #Capabilities
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/CapabilitiesFactory.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/CapabilitiesFactory.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/CapabilityMessagingService.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/CapabilityMessagingService.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/core/include/MessageChannel.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/core/src/MessageChannel.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/core/include/PublisherForwarder.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/core/src/PublisherForwarder.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/core/include/SubscriberForwarder.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/core/src/SubscriberForwarder.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/communication/include/PhoneControlMessages.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/communication/include/PhoneControlCapability.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/communication/src/PhoneControlCapability.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/navigation/include/NavigationMessages.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/navigation/include/NavigationCapability.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/navigation/src/NavigationCapability.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/guimetadata/include/GuiMetadataMessages.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/guimetadata/include/GuiMetadataCapability.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/guimetadata/src/GuiMetadataCapability.cpp
+
+        #Utilities
+        ${CMAKE_CURRENT_SOURCE_DIR}/utilities/events/EventRouter.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/utilities/events/EventRouter.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/utilities/logging/Logger.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/utilities/logging/Logger.cpp
+        ${CMAKE_CURRENT_SOURCE_DIR}/utilities/uuid/UUIDGeneration.h
+        ${CMAKE_CURRENT_SOURCE_DIR}/utilities/uuid/UUIDGeneration.cpp
+    )
+
+    # Define targets
+    ADD_LIBRARY(${TARGET_NAME} MODULE
+        ${VSHL_LIB_SRC}
+    )
+
+    # VSHL plugin properties
+    SET_TARGET_PROPERTIES(${TARGET_NAME} PROPERTIES
+        LABELS "PLUGIN"
+        PREFIX ""
+        SUFFIX ".ctlso"
+        OUTPUT_NAME ${TARGET_NAME}
+    )
+
+    # Define target includes
+    TARGET_INCLUDE_DIRECTORIES(${TARGET_NAME}
+        PUBLIC ${GLIB_PKG_INCLUDE_DIRS}
+        PUBLIC  "${CMAKE_CURRENT_SOURCE_DIR}"
+        PRIVATE "${CMAKE_SOURCE_DIR}/app-controller/ctl-lib"
+    )
+
+    # Library dependencies (include updates automatically)
+    TARGET_LINK_LIBRARIES(${TARGET_NAME}
+        afb-helpers
+        ${GLIB_PKG_LIBRARIES}
+        ${link_libraries}
+    )
+
+    option(ENABLE_UNIT_TESTS "Build unit tests or not" OFF)
+    if (ENABLE_UNIT_TESTS)
+        execute_process(
+            COMMAND "${CMAKE_CURRENT_SOURCE_DIR}/agreement.sh"
+            RESULT_VARIABLE AGREEMENT_RESULT
+        )
+        message(STATUS "Agreement Result: ${AGREEMENT_RESULT}")
+        if (${AGREEMENT_RESULT} MATCHES "1")
+            message(FATAL_ERROR "User agreement not accepted. Quitting")
+        endif()
+
+        include(cmake/gtest.cmake)
+
+        set(VSHL_TEST_SRC ${VSHL_LIB_SRC})
+        list(APPEND VSHL_TEST_SRC
+            # Main
+            ${CMAKE_CURRENT_SOURCE_DIR}/TestMain.cpp
+
+            # Test common
+            ${CMAKE_CURRENT_SOURCE_DIR}/test/common/ConsoleLogger.h
+            ${CMAKE_CURRENT_SOURCE_DIR}/test/common/ConsoleLogger.cpp
+
+            # Test Mocks
+            ${CMAKE_CURRENT_SOURCE_DIR}/test/mocks/AFBApiMock.h
+            ${CMAKE_CURRENT_SOURCE_DIR}/test/mocks/AFBEventMock.h
+            ${CMAKE_CURRENT_SOURCE_DIR}/test/mocks/AFBRequestMock.h
+            ${CMAKE_CURRENT_SOURCE_DIR}/test/mocks/CapabilityMock.h
+            ${CMAKE_CURRENT_SOURCE_DIR}/test/mocks/VoiceAgentsChangeObserverMock.h
+
+            # Capabilities
+            ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/test/CapabilityMessagingServiceTest.cpp
+            ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/test/PublisherForwarderTest.cpp
+            ${CMAKE_CURRENT_SOURCE_DIR}/capabilities/test/SubscriberForwarderTest.cpp
+
+            # Core
+            ${CMAKE_CURRENT_SOURCE_DIR}/core/test/VRRequestTest.cpp
+            ${CMAKE_CURRENT_SOURCE_DIR}/core/test/VRRequestProcessorTest.cpp
+
+            # VoiceAgents
+            ${CMAKE_CURRENT_SOURCE_DIR}/voiceagents/test/VoiceAgentTest.cpp
+            ${CMAKE_CURRENT_SOURCE_DIR}/voiceagents/test/VoiceAgentsDataManagerTest.cpp
+        )
+
+        ADD_EXECUTABLE(${TARGET_NAME}_Test
+            ${VSHL_TEST_SRC}
+        )
+
+        TARGET_INCLUDE_DIRECTORIES(${TARGET_NAME}_Test
+            PUBLIC ${GLIB_PKG_INCLUDE_DIRS}
+            PUBLIC  "${CMAKE_CURRENT_SOURCE_DIR}"
+            PRIVATE "${CMAKE_SOURCE_DIR}/app-controller/ctl-lib"
+        )
+
+        TARGET_LINK_LIBRARIES(${TARGET_NAME}_Test
+            afb-helpers
+            libgtest
+            libgmock
+            ${GLIB_PKG_LIBRARIES}
+            ${link_libraries}
+        )
+
+        ENABLE_TESTING()
+        ADD_TEST(VshlTest ${TARGET_NAME}_Test)
+    endif()
\ No newline at end of file
diff --git a/src/plugins/TestMain.cpp b/src/plugins/TestMain.cpp
new file mode 100644
index 0000000..d4fcbec
--- /dev/null
+++ b/src/plugins/TestMain.cpp
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "gtest/gtest.h"
+
+int main(int argc, char** argv) {
+    ::testing::InitGoogleTest(&argc, argv);
+    return RUN_ALL_TESTS();
+}
\ No newline at end of file
diff --git a/src/plugins/VshlApi.cpp b/src/plugins/VshlApi.cpp
new file mode 100644
index 0000000..f2c7b7c
--- /dev/null
+++ b/src/plugins/VshlApi.cpp
@@ -0,0 +1,607 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "VshlApi.h"
+
+#include <list>
+
+#include "afb/AFBApiImpl.h"
+#include "afb/AFBRequestImpl.h"
+#include "capabilities/CapabilitiesFactory.h"
+#include "capabilities/CapabilityMessagingService.h"
+#include "core/VRRequestProcessor.h"
+#include "utilities/events/EventRouter.h"
+#include "utilities/logging/Logger.h"
+#include "voiceagents/VoiceAgentEventNames.h"
+#include "voiceagents/VoiceAgentsDataManager.h"
+
+#include "json.hpp"
+
+using namespace std;
+
+CTLP_CAPI_REGISTER("vshl-api");
+
+static std::string TAG = "vshl::plugins::VshlAPI";
+
+static std::string VA_JSON_ATTR_DEFAULT = "default";
+static std::string VA_JSON_ATTR_AGENTS = "agents";
+static std::string VA_JSON_ATTR_ID = "id";
+static std::string VA_JSON_ATTR_NAME = "name";
+static std::string VA_JSON_ATTR_API = "api";
+static std::string VA_JSON_ATTR_ACTIVE = "active";
+static std::string VA_JSON_ATTR_WWS = "wakewords";
+static std::string VA_JSON_ATTR_ACTIVE_WW = "activewakeword";
+static std::string VA_JSON_ATTR_DESCRIPTION = "description";
+static std::string VA_JSON_ATTR_VENDOR = "vendor";
+
+static std::string STARTLISTENING_JSON_ATTR_REQUEST = "request_id";
+
+static std::string EVENTS_JSON_ATTR_VA_ID = "va_id";
+static std::string EVENTS_JSON_ATTR_EVENTS = "events";
+
+static std::string CAPABILITIES_JSON_ATTR_ACTION = "action";
+static std::string CAPABILITIES_JSON_ATTR_ACTIONS = "actions";
+static std::string CAPABILITIES_JSON_ATTR_PAYLOAD = "payload";
+
+static std::shared_ptr<vshl::utilities::logging::Logger> sLogger;
+static std::shared_ptr<vshl::common::interfaces::IAFBApi> sAfbApi;
+static std::unique_ptr<vshl::capabilities::CapabilitiesFactory> sCapabilitiesFactory;
+static std::unique_ptr<vshl::capabilities::CapabilityMessagingService> sCapabilityMessagingService;
+static std::unique_ptr<vshl::core::VRRequestProcessor> sVRRequestProcessor;
+static std::unique_ptr<vshl::voiceagents::VoiceAgentsDataManager> sVoiceAgentsDataManager;
+static std::unique_ptr<vshl::utilities::events::EventRouter> sEventRouter;
+
+using json = nlohmann::json;
+using Level = vshl::utilities::logging::Logger::Level;
+
+CTLP_ONLOAD(plugin, ret) {
+    if (plugin->api == nullptr) {
+        return -1;
+    }
+
+    // Logger
+    sLogger = vshl::utilities::logging::Logger::create(plugin->api);
+    // sLogger->log(Level::INFO, TAG, "Vshl plugin loaded & initialized.");
+
+    // AFB Wrapper
+    sAfbApi = vshl::afb::AFBApiImpl::create(plugin->api);
+
+    // VRRequestProcessor
+    auto vrRequestProcessorDelegate = vshl::core::VRRequestProcessorDelegate::create(sLogger, sAfbApi);
+    sVRRequestProcessor = vshl::core::VRRequestProcessor::create(sLogger, vrRequestProcessorDelegate);
+    if (!sVRRequestProcessor) {
+        sLogger->log(Level::ERROR, TAG, "Failed to create VRRequestProcessor");
+        return -1;
+    }
+
+    // VoiceAgentDataManager
+    sVoiceAgentsDataManager = vshl::voiceagents::VoiceAgentsDataManager::create(sLogger, sAfbApi);
+    if (!sVoiceAgentsDataManager) {
+        sLogger->log(Level::ERROR, TAG, "Failed to create VoiceAgentsDataManager");
+        return -1;
+    }
+    sVoiceAgentsDataManager->addVoiceAgentsChangeObserver(sVRRequestProcessor->getVoiceAgentsChangeObserver());
+
+    // EventRouter
+    sEventRouter = vshl::utilities::events::EventRouter::create(sLogger);
+    if (!sEventRouter) {
+        sLogger->log(Level::ERROR, TAG, "Failed to create EventRouter");
+        return -1;
+    }
+    sEventRouter->addEventFilter(sVoiceAgentsDataManager->getEventFilter());
+
+    sCapabilitiesFactory = vshl::capabilities::CapabilitiesFactory::create();
+    if (!sCapabilitiesFactory) {
+        sLogger->log(Level::ERROR, TAG, "Failed to create CapabilitiesFactory");
+        return -1;
+    }
+
+    sCapabilityMessagingService = vshl::capabilities::CapabilityMessagingService::create(sLogger, sAfbApi);
+    if (!sCapabilityMessagingService) {
+        sLogger->log(Level::ERROR, TAG, "Failed to create CapabilityMessagingService");
+        return -1;
+    }
+
+    return 0;
+}
+
+CTLP_CAPI(onAuthStateEvent, source, argsJ, eventJ) {
+    if (sEventRouter == nullptr) {
+        return -1;
+    }
+
+    string eventName = vshl::voiceagents::VSHL_EVENT_AUTH_STATE_EVENT;
+    json eventJson = json::parse(json_object_to_json_string(eventJ));
+    if (eventJson.find(EVENTS_JSON_ATTR_VA_ID) == eventJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "onAuthStateEvent: No voiceagent id found.");
+        return -1;
+    }
+    std::string voiceAgentId(eventJson[EVENTS_JSON_ATTR_VA_ID].get<string>());
+
+    if (!sEventRouter->handleIncomingEvent(eventName, voiceAgentId, json_object_to_json_string(eventJ))) {
+        sLogger->log(Level::ERROR, TAG, "onAuthStateEvent: Failed to handle.");
+        return -1;
+    }
+
+    return 0;
+}
+
+CTLP_CAPI(onConnectionStateEvent, source, argsJ, eventJ) {
+    if (sEventRouter == nullptr) {
+        return -1;
+    }
+
+    string eventName = vshl::voiceagents::VSHL_EVENT_CONNECTION_STATE_EVENT;
+    json eventJson = json::parse(json_object_to_json_string(eventJ));
+    if (eventJson.find(EVENTS_JSON_ATTR_VA_ID) == eventJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "onConnectionStateEvent: No voiceagent id found.");
+        return -1;
+    }
+    std::string voiceAgentId(eventJson[EVENTS_JSON_ATTR_VA_ID].get<string>());
+
+    if (!sEventRouter->handleIncomingEvent(eventName, voiceAgentId, json_object_to_json_string(eventJ))) {
+        sLogger->log(Level::ERROR, TAG, "onConnectionStateEvent: Failed to handle.");
+        return -1;
+    }
+
+    return 0;
+}
+
+CTLP_CAPI(onDialogStateEvent, source, argsJ, eventJ) {
+    if (sEventRouter == nullptr) {
+        return -1;
+    }
+
+    string eventName = vshl::voiceagents::VSHL_EVENT_DIALOG_STATE_EVENT;
+    json eventJson = json::parse(json_object_to_json_string(eventJ));
+    if (eventJson.find(EVENTS_JSON_ATTR_VA_ID) == eventJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "onDialogStateEvent: No voiceagent id found.");
+        return -1;
+    }
+    std::string voiceAgentId(eventJson[EVENTS_JSON_ATTR_VA_ID].get<string>());
+
+    if (!sEventRouter->handleIncomingEvent(eventName, voiceAgentId, json_object_to_json_string(eventJ))) {
+        sLogger->log(Level::ERROR, TAG, "onDialogStateEvent: Failed to handle.");
+        return -1;
+    }
+
+    return 0;
+}
+
+CTLP_CAPI(loadVoiceAgentsConfig, source, argsJ, eventJ) {
+    if (sVoiceAgentsDataManager == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "loadVoiceAgentsConfig: Voice service not initialized.");
+        return -1;
+    }
+
+    if (argsJ == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "loadVoiceAgentsConfig: No arguments supplied.");
+        return -1;
+    }
+
+    json agentsConfigJson = json::parse(json_object_to_json_string(argsJ));
+    if (agentsConfigJson.find(VA_JSON_ATTR_AGENTS) == agentsConfigJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "loadVoiceAgentsConfig: No agents object found in agents json");
+        return -1;
+    }
+
+    json agentsJson = agentsConfigJson[VA_JSON_ATTR_AGENTS];
+    for (auto agentIt = agentsJson.begin(); agentIt != agentsJson.end(); ++agentIt) {
+        json agentJson = *agentIt;
+
+        if (agentJson.find(VA_JSON_ATTR_ID) == agentJson.end() ||
+            agentJson.find(VA_JSON_ATTR_ACTIVE) == agentJson.end() ||
+            agentJson.find(VA_JSON_ATTR_NAME) == agentJson.end() ||
+            agentJson.find(VA_JSON_ATTR_API) == agentJson.end() ||
+            agentJson.find(VA_JSON_ATTR_WWS) == agentJson.end() ||
+            agentJson.find(VA_JSON_ATTR_ACTIVE_WW) == agentJson.end() ||
+            agentJson.find(VA_JSON_ATTR_DESCRIPTION) == agentJson.end() ||
+            agentJson.find(VA_JSON_ATTR_VENDOR) == agentJson.end()) {
+            std::stringstream error;
+            error << "loadVoiceAgentsConfig: One or more missing params in agent "
+                     "config "
+                  << agentJson.dump();
+            sLogger->log(Level::WARNING, TAG, error.str().c_str());
+            continue;
+        }
+
+        std::string id(agentJson[VA_JSON_ATTR_ID].get<string>());
+        std::string name(agentJson[VA_JSON_ATTR_NAME].get<string>());
+        std::string api(agentJson[VA_JSON_ATTR_API].get<string>());
+        std::string description(agentJson[VA_JSON_ATTR_DESCRIPTION].get<string>());
+        std::string vendor(agentJson[VA_JSON_ATTR_VENDOR].get<string>());
+        std::string activeWakeword(agentJson[VA_JSON_ATTR_ACTIVE_WW].get<string>());
+        bool isActive(agentJson[VA_JSON_ATTR_ACTIVE].get<bool>());
+
+        shared_ptr<unordered_set<string>> wakewords = std::make_shared<unordered_set<string>>();
+        json wakewordsJson = agentJson[VA_JSON_ATTR_WWS];
+        for (auto wwIt = wakewordsJson.begin(); wwIt != wakewordsJson.end(); ++wwIt) {
+            wakewords->insert(wwIt->get<string>());
+        }
+
+        sVoiceAgentsDataManager->addNewVoiceAgent(
+            id, name, description, api, vendor, activeWakeword, isActive, wakewords);
+    }
+
+    // Set the default agent.
+    if (agentsConfigJson.find(VA_JSON_ATTR_DEFAULT) == agentsConfigJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "loadVoiceAgentsConfig: No default agent found in agents json");
+        return -1;
+    }
+    std::string defaultAgentId(agentsConfigJson[VA_JSON_ATTR_DEFAULT].get<string>());
+    sVoiceAgentsDataManager->setDefaultVoiceAgent(defaultAgentId);
+
+    return 0;
+}
+
+CTLP_CAPI(startListening, source, argsJ, eventJ) {
+    if (sVRRequestProcessor == nullptr) {
+        return -1;
+    }
+
+    int result = 0;
+    string requestId = sVRRequestProcessor->startListening();
+
+    if (!requestId.empty()) {
+        json responseJson;
+        responseJson[STARTLISTENING_JSON_ATTR_REQUEST] = requestId;
+        AFB_ReqSuccess(source->request, json_tokener_parse(responseJson.dump().c_str()), NULL);
+    } else {
+        AFB_ReqFail(source->request, NULL, "Failed to startListening...");
+    }
+
+    return 0;
+}
+
+CTLP_CAPI(cancelListening, source, argsJ, eventJ) {
+    return 0;
+}
+
+CTLP_CAPI(enumerateVoiceAgents, source, argsJ, eventJ) {
+    if (sVoiceAgentsDataManager == nullptr) {
+        return -1;
+    }
+
+    auto agents = sVoiceAgentsDataManager->getAllVoiceAgents();
+    std::string defaultAgentId(sVoiceAgentsDataManager->getDefaultVoiceAgent());
+
+    json responseJson;
+    json agentsJson = json::array();
+
+    for (auto agent : agents) {
+        json agentJson;
+        agentJson[VA_JSON_ATTR_ID] = agent->getId();
+        agentJson[VA_JSON_ATTR_NAME] = agent->getName();
+        agentJson[VA_JSON_ATTR_DESCRIPTION] = agent->getDescription();
+        agentJson[VA_JSON_ATTR_API] = agent->getApi();
+        agentJson[VA_JSON_ATTR_VENDOR] = agent->getVendor();
+        agentJson[VA_JSON_ATTR_ACTIVE] = agent->isActive();
+        agentJson[VA_JSON_ATTR_ACTIVE_WW] = agent->getActiveWakeword();
+
+        auto wakewords = agent->getWakeWords();
+        if (wakewords != nullptr) {
+            json wakewordsJson;
+            for (auto wakeword : *wakewords) {
+                wakewordsJson.push_back(wakeword);
+            }
+            agentJson[VA_JSON_ATTR_WWS] = wakewordsJson;
+        }
+
+        agentsJson.push_back(agentJson);
+    }
+
+    responseJson[VA_JSON_ATTR_AGENTS] = agentsJson;
+    responseJson[VA_JSON_ATTR_DEFAULT] = defaultAgentId;
+
+    AFB_ReqSuccess(source->request, json_tokener_parse(responseJson.dump().c_str()), NULL);
+
+    return 0;
+}
+
+CTLP_CAPI(subscribe, source, argsJ, eventJ) {
+    if (sVoiceAgentsDataManager == nullptr) {
+        return -1;
+    }
+
+    if (eventJ == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "subscribe: No arguments supplied.");
+        return -1;
+    }
+
+    json subscribeJson = json::parse(json_object_to_json_string(eventJ));
+    if (subscribeJson.find(EVENTS_JSON_ATTR_VA_ID) == subscribeJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "subscribe: No voiceagent id found in subscribe json");
+        return -1;
+    }
+    std::string voiceAgentId(subscribeJson[EVENTS_JSON_ATTR_VA_ID].get<string>());
+
+    if (subscribeJson.find(EVENTS_JSON_ATTR_EVENTS) == subscribeJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "subscribe: No events array found in subscribe json");
+        return -1;
+    }
+    list<string> events(subscribeJson[EVENTS_JSON_ATTR_EVENTS].get<list<string>>());
+
+    // Subscribe this client for the listed events.
+    auto request = vshl::afb::AFBRequestImpl::create(source->request);
+    for (auto event : events) {
+        if (!sVoiceAgentsDataManager->subscribeToVshlEventFromVoiceAgent(*request, event, voiceAgentId)) {
+            sLogger->log(Level::ERROR, TAG, "subscribe: Failed to subscribe to event: " + event);
+            return -1;
+        }
+    }
+
+    AFB_ReqSuccess(source->request, json_object_new_string("Subscription to events successfully completed."), NULL);
+
+    return 0;
+}
+
+CTLP_CAPI(setDefaultVoiceAgent, source, argsJ, eventJ) {
+    if (sVoiceAgentsDataManager == nullptr) {
+        return -1;
+    }
+
+    if (eventJ == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "setDefaultVoiceAgent: No arguments supplied.");
+        return -1;
+    }
+
+    json jsonRequest = json::parse(json_object_to_json_string(eventJ));
+    if (jsonRequest.find(VA_JSON_ATTR_ID) == jsonRequest.end()) {
+        sLogger->log(Level::ERROR, TAG, "setDefaultVoiceAgent: voice agent id not found in request json");
+        return -1;
+    }
+
+    std::string voiceAgentId(jsonRequest[VA_JSON_ATTR_ID].get<string>());
+    if (!sVoiceAgentsDataManager->setDefaultVoiceAgent(voiceAgentId)) {
+        sLogger->log(Level::ERROR, TAG, "setDefaultVoiceAgent: Failed to set default agent");
+        return -1;
+    }
+
+    AFB_ReqSuccess(source->request, NULL, NULL);
+    return 0;
+}
+
+CTLP_CAPI(guiMetadataSubscribe, source, argsJ, eventJ) {
+    if (sCapabilitiesFactory == nullptr || sCapabilityMessagingService == nullptr) {
+        return -1;
+    }
+
+    shared_ptr<vshl::common::interfaces::ICapability> guMetadataCapability = sCapabilitiesFactory->getGuiMetadata();
+    if (!guMetadataCapability) {
+        sLogger->log(
+            Level::WARNING,
+            TAG,
+            "guimetadataSubscribe: Failed to "
+            "fetch guimetadata capability "
+            "object.");
+        return -1;
+    }
+
+    if (eventJ == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "guimetadataSubscribe: No arguments supplied.");
+        return -1;
+    }
+
+    json subscribeJson = json::parse(json_object_to_json_string(eventJ));
+    if (subscribeJson.find(CAPABILITIES_JSON_ATTR_ACTIONS) == subscribeJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "guimetadataSubscribe: No events array found in subscribe json");
+        return -1;
+    }
+    list<string> events(subscribeJson[CAPABILITIES_JSON_ATTR_ACTIONS].get<list<string>>());
+
+    // SUbscribe this client for the guimetadata events.
+    auto request = vshl::afb::AFBRequestImpl::create(source->request);
+    for (auto event : events) {
+        if (!sCapabilityMessagingService->subscribe(*request, guMetadataCapability, event)) {
+            sLogger->log(Level::ERROR, TAG, "guimetadataSubscribe: Failed to subscribe to event: " + event);
+            return -1;
+        }
+    }
+
+    AFB_ReqSuccess(
+        source->request, json_object_new_string("Subscription to guimetadata events successfully completed."), NULL);
+    return 0;
+}
+
+CTLP_CAPI(guiMetadataPublish, source, argsJ, eventJ) {
+    if (sCapabilitiesFactory == nullptr || sCapabilityMessagingService == nullptr) {
+        return -1;
+    }
+
+    shared_ptr<vshl::common::interfaces::ICapability> guMetadataCapability = sCapabilitiesFactory->getGuiMetadata();
+    if (!guMetadataCapability) {
+        sLogger->log(
+            Level::WARNING,
+            TAG,
+            "guimetadataPublish: Failed to fetch "
+            "guimetadata capability object.");
+        return -1;
+    }
+
+    if (eventJ == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "guimetadataPublish: No arguments supplied.");
+        return -1;
+    }
+
+    json publishJson = json::parse(json_object_to_json_string(eventJ));
+    if (publishJson.find(CAPABILITIES_JSON_ATTR_ACTION) == publishJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "guimetadataPublish: No action found in publish json");
+        return -1;
+    }
+    std::string action(publishJson[CAPABILITIES_JSON_ATTR_ACTION].get<string>());
+
+    if (publishJson.find(CAPABILITIES_JSON_ATTR_PAYLOAD) == publishJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "guimetadataPublish: No payload found in publish json");
+        return -1;
+    }
+    std::string payload(publishJson[CAPABILITIES_JSON_ATTR_PAYLOAD].get<string>());
+
+    if (!sCapabilityMessagingService->publish(guMetadataCapability, action, payload)) {
+        sLogger->log(Level::ERROR, TAG, "guimetadataPublish: Failed to publish message: " + action);
+        return -1;
+    }
+
+    AFB_ReqSuccess(source->request, json_object_new_string("Successfully published guimetadata messages."), NULL);
+    return 0;
+}
+
+CTLP_CAPI(phonecontrolSubscribe, source, argsJ, eventJ) {
+    if (sCapabilitiesFactory == nullptr || sCapabilityMessagingService == nullptr) {
+        return -1;
+    }
+
+    shared_ptr<vshl::common::interfaces::ICapability> phoneControlCapability = sCapabilitiesFactory->getPhoneControl();
+    if (!phoneControlCapability) {
+        sLogger->log(Level::WARNING, TAG, "phoneControlSubscribe: Failed to fetch phone control capability object.");
+        return -1;
+    }
+
+    if (eventJ == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "phoneControlSubscribe: No arguments supplied.");
+        return -1;
+    }
+
+    json subscribeJson = json::parse(json_object_to_json_string(eventJ));
+    if (subscribeJson.find(CAPABILITIES_JSON_ATTR_ACTIONS) == subscribeJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "phoneControlSubscribe: No events array found in subscribe json");
+        return -1;
+    }
+    list<string> events(subscribeJson[CAPABILITIES_JSON_ATTR_ACTIONS].get<list<string>>());
+
+    // SUbscribe this client for the phone call control events.
+    auto request = vshl::afb::AFBRequestImpl::create(source->request);
+    for (auto event : events) {
+        if (!sCapabilityMessagingService->subscribe(*request, phoneControlCapability, event)) {
+            sLogger->log(Level::ERROR, TAG, "phoneControlSubscribe: Failed to subscribe to event: " + event);
+            return -1;
+        }
+    }
+
+    AFB_ReqSuccess(
+        source->request, json_object_new_string("Subscription to phone control events successfully completed."), NULL);
+    return 0;
+}
+
+CTLP_CAPI(phonecontrolPublish, source, argsJ, eventJ) {
+    if (sCapabilitiesFactory == nullptr || sCapabilityMessagingService == nullptr) {
+        return -1;
+    }
+
+    shared_ptr<vshl::common::interfaces::ICapability> phoneControlCapability = sCapabilitiesFactory->getPhoneControl();
+    if (!phoneControlCapability) {
+        sLogger->log(Level::WARNING, TAG, "phoneControlPublish: Failed to fetch navigation capability object.");
+        return -1;
+    }
+
+    if (eventJ == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "phoneControlPublish: No arguments supplied.");
+        return -1;
+    }
+
+    json publishJson = json::parse(json_object_to_json_string(eventJ));
+    if (publishJson.find(CAPABILITIES_JSON_ATTR_ACTION) == publishJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "phoneControlPublish: No action found in publish json");
+        return -1;
+    }
+    std::string action(publishJson[CAPABILITIES_JSON_ATTR_ACTION].get<string>());
+
+    if (publishJson.find(CAPABILITIES_JSON_ATTR_PAYLOAD) == publishJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "phoneControlPublish: No payload found in publish json");
+        return -1;
+    }
+    std::string payload(publishJson[CAPABILITIES_JSON_ATTR_PAYLOAD].get<string>());
+
+    if (!sCapabilityMessagingService->publish(phoneControlCapability, action, payload)) {
+        sLogger->log(Level::ERROR, TAG, "phoneControlPublish: Failed to publish message: " + action);
+        return -1;
+    }
+
+    AFB_ReqSuccess(source->request, json_object_new_string("Successfully published phone control messages."), NULL);
+    return 0;
+}
+
+CTLP_CAPI(navigationSubscribe, source, argsJ, eventJ) {
+    if (sCapabilitiesFactory == nullptr || sCapabilityMessagingService == nullptr) {
+        return -1;
+    }
+
+    shared_ptr<vshl::common::interfaces::ICapability> navigationCapability = sCapabilitiesFactory->getNavigation();
+    if (!navigationCapability) {
+        sLogger->log(Level::WARNING, TAG, "navigationSubscribe: Failed to fetch navigation capability object.");
+        return -1;
+    }
+
+    if (eventJ == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "navigationSubscribe: No arguments supplied.");
+        return -1;
+    }
+
+    json subscribeJson = json::parse(json_object_to_json_string(eventJ));
+    if (subscribeJson.find(CAPABILITIES_JSON_ATTR_ACTIONS) == subscribeJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "navigationSubscribe: No events array found in subscribe json");
+        return -1;
+    }
+    list<string> events(subscribeJson[CAPABILITIES_JSON_ATTR_ACTIONS].get<list<string>>());
+
+    // SUbscribe this client for the navigation events.
+    auto request = vshl::afb::AFBRequestImpl::create(source->request);
+    for (auto event : events) {
+        if (!sCapabilityMessagingService->subscribe(*request, navigationCapability, event)) {
+            sLogger->log(Level::ERROR, TAG, "navigationSubscribe: Failed to subscribe to event: " + event);
+            return -1;
+        }
+    }
+
+    AFB_ReqSuccess(
+        source->request, json_object_new_string("Subscription to navigation events successfully completed."), NULL);
+    return 0;
+}
+
+CTLP_CAPI(navigationPublish, source, argsJ, eventJ) {
+    if (sCapabilitiesFactory == nullptr || sCapabilityMessagingService == nullptr) {
+        return -1;
+    }
+
+    shared_ptr<vshl::common::interfaces::ICapability> navigationCapability = sCapabilitiesFactory->getNavigation();
+    if (!navigationCapability) {
+        sLogger->log(Level::WARNING, TAG, "navigationPublish: Failed to fetch navigation capability object.");
+        return -1;
+    }
+
+    if (eventJ == nullptr) {
+        sLogger->log(Level::WARNING, TAG, "navigationPublish: No arguments supplied.");
+        return -1;
+    }
+
+    json publishJson = json::parse(json_object_to_json_string(eventJ));
+    if (publishJson.find(CAPABILITIES_JSON_ATTR_ACTION) == publishJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "navigationPublish: No action found in publish json");
+        return -1;
+    }
+    std::string action(publishJson[CAPABILITIES_JSON_ATTR_ACTION].get<string>());
+
+    if (publishJson.find(CAPABILITIES_JSON_ATTR_PAYLOAD) == publishJson.end()) {
+        sLogger->log(Level::ERROR, TAG, "navigationPublish: No payload found in publish json");
+        return -1;
+    }
+    std::string payload(publishJson[CAPABILITIES_JSON_ATTR_PAYLOAD].get<string>());
+
+    if (!sCapabilityMessagingService->publish(navigationCapability, action, payload)) {
+        sLogger->log(Level::ERROR, TAG, "navigationPublish: Failed to publish message: " + action);
+        return -1;
+    }
+
+    AFB_ReqSuccess(source->request, json_object_new_string("Successfully published navigation messages."), NULL);
+    return 0;
+}
diff --git a/src/plugins/VshlApi.h b/src/plugins/VshlApi.h
new file mode 100644
index 0000000..f228943
--- /dev/null
+++ b/src/plugins/VshlApi.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2017-2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_API_INCLUDE
+#define VSHL_API_INCLUDE
+
+#include "ctl-plugin.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+CTLP_ONLOAD(plugin, ret);
+CTLP_INIT(plugin, ret);
+int onAuthStateEvent(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int onConnectionStateEvent(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int onDialogStateEvent(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int loadVoiceAgentsConfig(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int startListening(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int cancelListening(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int enumerateVoiceAgents(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int subscribe(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int setDefaultVoiceAgent(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int guiMetadataSubscribe(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int guiMetadataPublish(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int phonecontrolSubscribe(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int phonecontrolPublish(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int navigationSubscribe(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+int navigationPublish(CtlSourceT* source, json_object* argsJ, json_object* queryJ);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // VSHL_API_INCLUDE
diff --git a/src/plugins/afb/AFBApiImpl.cpp b/src/plugins/afb/AFBApiImpl.cpp
new file mode 100644
index 0000000..88d1e7e
--- /dev/null
+++ b/src/plugins/afb/AFBApiImpl.cpp
@@ -0,0 +1,87 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include "afb/AFBApiImpl.h"
+
+#include "afb/include/AFBEventImpl.h"
+#include "utilities/logging/Logger.h"
+
+extern "C" {
+#define AFB_BINDING_VERSION 3
+#define FREEIF(x) \
+    if (!x) {     \
+        free(x);  \
+    }
+#define BREAKIF(x)      \
+    if (x) {            \
+        result = false; \
+        break;          \
+    }
+
+#include "afb-definitions.h"
+}
+
+static std::string TAG = "vshl::afb::AFBApiImpl";
+
+/**
+ * Specifies the severity level of a log message
+ */
+using Level = vshl::common::interfaces::ILogger::Level;
+using namespace vshl::common::interfaces;
+using namespace vshl::utilities::logging;
+
+namespace vshl {
+namespace afb {
+
+std::unique_ptr<AFBApiImpl> AFBApiImpl::create(AFB_ApiT api) {
+    return std::unique_ptr<AFBApiImpl>(new AFBApiImpl(api));
+}
+
+AFBApiImpl::AFBApiImpl(AFB_ApiT api) : mApi(api), mLogger(Logger::create(api)) {
+}
+
+AFBApiImpl::~AFBApiImpl() {
+}
+
+std::shared_ptr<IAFBApi::IAFBEvent> AFBApiImpl::createEvent(const std::string& eventName) {
+    return AFBEventImpl::create(mLogger, mApi, eventName);
+}
+
+int AFBApiImpl::callSync(
+    const std::string& api,
+    const std::string& verb,
+    struct json_object* request,
+    struct json_object** result,
+    std::string& error,
+    std::string& info) {
+    char* errorStr = NULL;
+    char* infoStr = NULL;
+    int rc = AFB_ApiSync(mApi, api.c_str(), verb.c_str(), request, result, &errorStr, &infoStr);
+
+    if (errorStr) {
+        error = errorStr;
+        free(errorStr);
+    }
+
+    if (infoStr) {
+        info = infoStr;
+        free(infoStr);
+    }
+
+    return rc;
+}
+
+}  // namespace afb
+}  // namespace vshl
diff --git a/src/plugins/afb/AFBApiImpl.h b/src/plugins/afb/AFBApiImpl.h
new file mode 100644
index 0000000..74aa7ef
--- /dev/null
+++ b/src/plugins/afb/AFBApiImpl.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_AFB_AFBAPIIMPL_H_
+#define VSHL_AFB_AFBAPIIMPL_H_
+
+#include <memory>
+
+extern "C" {
+#include "ctl-plugin.h"
+}
+
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/logging/ILogger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace afb {
+
+class AFBApiImpl : public vshl::common::interfaces::IAFBApi {
+public:
+    static std::unique_ptr<AFBApiImpl> create(AFB_ApiT api);
+
+    ~AFBApiImpl();
+
+    std::shared_ptr<IAFBEvent> createEvent(const std::string& eventName) override;
+
+    int callSync(
+        const std::string& api,
+        const std::string& verb,
+        struct json_object* request,
+        struct json_object** result,
+        std::string& error,
+        std::string& info) override;
+
+private:
+    AFBApiImpl(AFB_ApiT api);
+
+    // AFB API Binding
+    AFB_ApiT mApi;
+
+    // Logger
+    std::shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace afb
+}  // namespace vshl
+
+#endif  // VSHL_AFB_AFBAPIIMPL_H_
diff --git a/src/plugins/afb/AFBRequestImpl.cpp b/src/plugins/afb/AFBRequestImpl.cpp
new file mode 100644
index 0000000..8ec5691
--- /dev/null
+++ b/src/plugins/afb/AFBRequestImpl.cpp
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include "afb/AFBRequestImpl.h"
+
+extern "C" {
+#include "afb-definitions.h"
+}
+
+namespace vshl {
+namespace afb {
+
+std::unique_ptr<AFBRequestImpl> AFBRequestImpl::create(AFB_ReqT afbRequest) {
+    return std::unique_ptr<AFBRequestImpl>(new AFBRequestImpl(afbRequest));
+}
+
+AFBRequestImpl::AFBRequestImpl(AFB_ReqT afbRequest) : mAfbRequest(afbRequest) {
+}
+
+void* AFBRequestImpl::getNativeRequest() {
+    return mAfbRequest;
+}
+
+}  // namespace afb
+}  // namespace vshl
diff --git a/src/plugins/afb/AFBRequestImpl.h b/src/plugins/afb/AFBRequestImpl.h
new file mode 100644
index 0000000..2e6f3ab
--- /dev/null
+++ b/src/plugins/afb/AFBRequestImpl.h
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_AFB_AFBREQUESTIMPL_H_
+#define VSHL_AFB_AFBREQUESTIMPL_H_
+
+#include <memory>
+
+extern "C" {
+#include "ctl-plugin.h"
+}
+
+#include "interfaces/afb/IAFBApi.h"
+
+namespace vshl {
+namespace afb {
+
+/**
+ * AFB Request impl
+ */
+class AFBRequestImpl : public vshl::common::interfaces::IAFBRequest {
+public:
+  static std::unique_ptr<AFBRequestImpl> create(AFB_ReqT afbRequest);
+
+  // {@c IAFBRequest Implementation
+  void *getNativeRequest() override;
+  // @c IAFBRequest Implementation }
+
+private:
+  AFBRequestImpl(AFB_ReqT afbRequest);
+
+  AFB_ReqT mAfbRequest;
+};
+
+} // namespace afb
+} // namespace vshl
+
+#endif // VSHL_AFB_AFBREQUESTIMPL_H_
diff --git a/src/plugins/afb/include/AFBEventImpl.h b/src/plugins/afb/include/AFBEventImpl.h
new file mode 100644
index 0000000..45f85f9
--- /dev/null
+++ b/src/plugins/afb/include/AFBEventImpl.h
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_AFB_EVENT_H_
+#define VSHL_AFB_EVENT_H_
+
+#include <memory>
+#include <string>
+
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/logging/ILogger.h"
+
+extern "C" {
+#include "ctl-plugin.h"
+#include <json-c/json.h>
+}
+
+using namespace std;
+
+namespace vshl {
+namespace afb {
+/*
+ * This class encapsulates AFB Event.
+ */
+class AFBEventImpl : public vshl::common::interfaces::IAFBApi::IAFBEvent {
+public:
+  static unique_ptr<AFBEventImpl>
+  create(shared_ptr<vshl::common::interfaces::ILogger> logger, AFB_ApiT api,
+         const string &eventName);
+
+  // Destructor
+  ~AFBEventImpl();
+
+  /// { @c IAFBEvent implementation
+  string getName() const override;
+  bool isValid() override;
+  int publishEvent(struct json_object *payload) override;
+  bool subscribe(vshl::common::interfaces::IAFBRequest &request) override;
+  bool unsubscribe(vshl::common::interfaces::IAFBRequest &request) override;
+  /// @c IAFBEvent implementation }
+
+private:
+  AFBEventImpl(shared_ptr<vshl::common::interfaces::ILogger> logger,
+               AFB_ApiT api, const string &eventName);
+
+  // Make the event. This is a lazy make that happens
+  // usually during the subscribe stage.
+  void makeEventIfNeccessary();
+
+  // Binding API reference
+  AFB_ApiT mAfbApi;
+
+  // AFB Event
+  afb_event_t mAfbEvent;
+
+  // Event Name
+  string mEventName;
+
+  // Logger
+  shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+} // namespace afb
+} // namespace vshl
+
+#endif // VSHL_AFB_EVENT_H_
diff --git a/src/plugins/afb/src/AFBEventImpl.cpp b/src/plugins/afb/src/AFBEventImpl.cpp
new file mode 100644
index 0000000..e3c902d
--- /dev/null
+++ b/src/plugins/afb/src/AFBEventImpl.cpp
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "afb/include/AFBEventImpl.h"
+
+static string TAG = "vshl::afb::Event";
+
+using Level = vshl::common::interfaces::ILogger::Level;
+using namespace vshl::common::interfaces;
+
+namespace vshl {
+namespace afb {
+
+unique_ptr<AFBEventImpl> AFBEventImpl::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    AFB_ApiT api,
+    const string& eventName) {
+    return unique_ptr<AFBEventImpl>(new AFBEventImpl(logger, api, eventName));
+}
+
+AFBEventImpl::AFBEventImpl(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    AFB_ApiT api,
+    const string& eventName) :
+        mLogger(logger),
+        mAfbApi(api),
+        mEventName(eventName),
+        mAfbEvent(nullptr) {
+}
+
+AFBEventImpl::~AFBEventImpl() {
+}
+
+string AFBEventImpl::getName() const {
+    return mEventName;
+}
+
+bool AFBEventImpl::isValid() {
+    makeEventIfNeccessary();
+    return afb_event_is_valid(mAfbEvent) == 1 ? true : false;
+}
+
+bool AFBEventImpl::subscribe(IAFBRequest& requestInterface) {
+    makeEventIfNeccessary();
+    auto request = static_cast<AFB_ReqT>(requestInterface.getNativeRequest());
+    if (isValid() && afb_req_subscribe(request, mAfbEvent) == 0) {
+        return true;
+    }
+
+    return false;
+}
+
+bool AFBEventImpl::unsubscribe(IAFBRequest& requestInterface) {
+    makeEventIfNeccessary();
+    auto request = static_cast<AFB_ReqT>(requestInterface.getNativeRequest());
+    if (isValid() && afb_req_unsubscribe(request, mAfbEvent) == 0) {
+        return true;
+    }
+
+    return false;
+}
+
+int AFBEventImpl::publishEvent(struct json_object* payload) {
+    makeEventIfNeccessary();
+    return afb_event_push(mAfbEvent, payload);
+}
+
+void AFBEventImpl::makeEventIfNeccessary() {
+    if (mAfbEvent) {
+        return;
+    }
+
+    mLogger->log(Level::NOTICE, TAG, "Creating VSHL event: " + mEventName);
+    mAfbEvent = afb_api_make_event(mAfbApi, mEventName.c_str());
+}
+
+}  // namespace afb
+}  // namespace vshl
diff --git a/src/plugins/agreement.sh b/src/plugins/agreement.sh
new file mode 100755
index 0000000..2a8eb71
--- /dev/null
+++ b/src/plugins/agreement.sh
@@ -0,0 +1,43 @@
+#********************************************************************************
+# Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License").
+# You may not use this file except in compliance with the License.
+# A copy of the License is located at
+#
+#     http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file is distributed
+# on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+# express or implied. See the License for the specific language governing
+# permissions and limitations under the License.
+#*********************************************************************************
+
+agreement_check() {
+	cat << EOF
+
+*******************************************************************************
+The scripts provided herein will retrieve several third-party libraries,
+environments, and/or other software packages at build-time
+("External Dependencies") from third-party sources. These are terms and
+conditions that you need to agree to abide by if you choose to build the
+External Dependencies. Licenses for the External Dependencies may be found at
+README.md. If you do not agree with every term and condition
+associated with the External Dependencies, enter “QUIT” in the command line
+when prompted by the script.
+*******************************************************************************
+
+EOF
+
+	answer="dummy"
+	while [ ! -z $answer ]; do
+		read -p "Type \"QUIT\" to exit the script now, press ENTER to continue: " -r  answer
+		if [ "$answer" = "QUIT" ]; then
+			exit 1
+		fi
+		echo ""
+	done
+}
+
+agreement_check
+exit 0
\ No newline at end of file
diff --git a/src/plugins/capabilities/CapabilitiesFactory.cpp b/src/plugins/capabilities/CapabilitiesFactory.cpp
new file mode 100644
index 0000000..2f92519
--- /dev/null
+++ b/src/plugins/capabilities/CapabilitiesFactory.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include "capabilities/CapabilitiesFactory.h"
+
+#include "capabilities/communication/include/PhoneControlCapability.h"
+#include "capabilities/guimetadata/include/GuiMetadataCapability.h"
+#include "capabilities/navigation/include/NavigationCapability.h"
+
+static string TAG = "vshl::core::CapabilitiesFactory";
+
+using Level = vshl::utilities::logging::Logger::Level;
+
+namespace vshl {
+namespace capabilities {
+
+// Create CapabilitiesFactory
+std::unique_ptr<CapabilitiesFactory> CapabilitiesFactory::create() {
+    auto capabilitiesFactory = std::unique_ptr<CapabilitiesFactory>(new CapabilitiesFactory());
+    return capabilitiesFactory;
+}
+
+std::shared_ptr<common::interfaces::ICapability> CapabilitiesFactory::getGuiMetadata() {
+    if (!mGuiMetadata) {
+        mGuiMetadata = vshl::capabilities::guimetadata::GuiMetadata::create();
+    }
+    return mGuiMetadata;
+}
+
+std::shared_ptr<common::interfaces::ICapability> CapabilitiesFactory::getPhoneControl() {
+    if (!mPhoneControl) {
+        mPhoneControl = vshl::capabilities::phonecontrol::PhoneControl::create();
+    }
+    return mPhoneControl;
+}
+
+std::shared_ptr<common::interfaces::ICapability> CapabilitiesFactory::getNavigation() {
+    if (!mNavigation) {
+        mNavigation = vshl::capabilities::navigation::Navigation::create();
+    }
+    return mNavigation;
+}
+
+}  // namespace capabilities
+}  // namespace vshl
\ No newline at end of file
diff --git a/src/plugins/capabilities/CapabilitiesFactory.h b/src/plugins/capabilities/CapabilitiesFactory.h
new file mode 100644
index 0000000..b73909b
--- /dev/null
+++ b/src/plugins/capabilities/CapabilitiesFactory.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CAPABILITIES_CAPABILITIESFACTORY_H_
+#define VSHL_CAPABILITIES_CAPABILITIESFACTORY_H_
+
+#include <memory>
+
+#include "interfaces/capabilities/ICapability.h"
+#include "utilities/logging/Logger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace capabilities {
+/*
+ * Factory for creating different capability objects.
+ */
+class CapabilitiesFactory {
+public:
+    // Create CapabilitiesFactory
+    static std::unique_ptr<CapabilitiesFactory> create();
+
+    // GUI Metadata capability
+    std::shared_ptr<common::interfaces::ICapability> getGuiMetadata();
+
+    // Phone call control capability
+    std::shared_ptr<common::interfaces::ICapability> getPhoneControl();
+
+    // Navigation capability
+    std::shared_ptr<common::interfaces::ICapability> getNavigation();
+
+    // Destructor
+    ~CapabilitiesFactory() = default;
+
+private:
+    // Constructor
+    CapabilitiesFactory() = default;
+
+    // Capabilities
+    shared_ptr<vshl::common::interfaces::ICapability> mGuiMetadata;
+    shared_ptr<vshl::common::interfaces::ICapability> mPhoneControl;
+    shared_ptr<vshl::common::interfaces::ICapability> mNavigation;
+
+    // Logger
+    unique_ptr<vshl::utilities::logging::Logger> mLogger;
+};
+
+}  // namespace capabilities
+}  // namespace vshl
+
+#endif  // VSHL_CAPABILITIES_CAPABILITIESFACTORY_H_
diff --git a/src/plugins/capabilities/CapabilityMessagingService.cpp b/src/plugins/capabilities/CapabilityMessagingService.cpp
new file mode 100644
index 0000000..91b5f2b
--- /dev/null
+++ b/src/plugins/capabilities/CapabilityMessagingService.cpp
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "capabilities/CapabilityMessagingService.h"
+
+#include "capabilities/core/include/PublisherForwarder.h"
+#include "capabilities/core/include/SubscriberForwarder.h"
+
+static string TAG = "vshl::capabilities::CapabilityMessagingService";
+
+using Level = vshl::common::interfaces::ILogger::Level;
+
+namespace vshl {
+namespace capabilities {
+
+// Create a CapabilityMessagingService.
+unique_ptr<CapabilityMessagingService> CapabilityMessagingService::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) {
+    if (logger == nullptr) {
+        return nullptr;
+    }
+
+    if (afbApi == nullptr) {
+        logger->log(Level::ERROR, TAG, "Failed to create CapabilityMessagingService: AFB API null");
+        return nullptr;
+    }
+
+    auto capabilityMessageService =
+        std::unique_ptr<CapabilityMessagingService>(new CapabilityMessagingService(logger, afbApi));
+    return capabilityMessageService;
+}
+
+CapabilityMessagingService::~CapabilityMessagingService() {
+    mMessageChannelsMap.clear();
+}
+
+CapabilityMessagingService::CapabilityMessagingService(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) :
+        mAfbApi(afbApi),
+        mLogger(logger) {
+}
+
+// Subscribe to capability specific messages.
+bool CapabilityMessagingService::subscribe(
+    vshl::common::interfaces::IAFBRequest& request,
+    shared_ptr<common::interfaces::ICapability> capability,
+    const string action) {
+    auto capabilityName = capability->getName();
+
+    if (capabilityName.empty()) {
+        mLogger->log(Level::ERROR, TAG, "Failed to subscribe to message. Invalid input.");
+        return false;
+    }
+
+    auto messageChannel = getMessageChannel(capability);
+    return messageChannel->subscribe(request, action);
+}
+
+// Publish capability messages.
+bool CapabilityMessagingService::publish(
+    shared_ptr<common::interfaces::ICapability> capability,
+    const string action,
+    const string payload) {
+    auto capabilityName = capability->getName();
+
+    if (capabilityName.empty()) {
+        mLogger->log(Level::ERROR, TAG, "Failed to publish message. Invalid input.");
+        return false;
+    }
+
+    auto messageChannelIt = mMessageChannelsMap.find(capabilityName);
+    if (messageChannelIt == mMessageChannelsMap.end()) {
+        mLogger->log(
+            Level::ERROR,
+            TAG,
+            "Failed to publish message. Message channel doesn't exist for capability " + capabilityName);
+        return false;
+    }
+
+    return messageChannelIt->second->publish(action, payload);
+}
+
+shared_ptr<vshl::capabilities::core::MessageChannel> CapabilityMessagingService::getMessageChannel(
+    shared_ptr<common::interfaces::ICapability> capability) {
+    auto capabilityName = capability->getName();
+
+    if (capabilityName.empty()) {
+        mLogger->log(Level::ERROR, TAG, "Failed to create message channel. Invalid input.");
+        return nullptr;
+    }
+
+    auto messageChannelIt = mMessageChannelsMap.find(capabilityName);
+    if (messageChannelIt == mMessageChannelsMap.end()) {
+        mLogger->log(Level::INFO, TAG, "Creating new message channel for capability: " + capabilityName);
+        auto messageChannel = vshl::capabilities::core::MessageChannel::create(mLogger, mAfbApi, capability);
+        mMessageChannelsMap.insert(make_pair(capabilityName, messageChannel));
+        return messageChannel;
+    }
+
+    return messageChannelIt->second;
+}
+
+}  // namespace capabilities
+}  // namespace vshl
diff --git a/src/plugins/capabilities/CapabilityMessagingService.h b/src/plugins/capabilities/CapabilityMessagingService.h
new file mode 100644
index 0000000..535e806
--- /dev/null
+++ b/src/plugins/capabilities/CapabilityMessagingService.h
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CAPABILITIES_CAPABILITYMESSAGINGSERVICE_H_
+#define VSHL_CAPABILITIES_CAPABILITYMESSAGINGSERVICE_H_
+
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+#include "capabilities/core/include/MessageChannel.h"
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/capabilities/ICapability.h"
+#include "interfaces/utilities/logging/ILogger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace capabilities {
+/*
+ * This hosts service APIs that clients can use to subscribe and
+ * forward capability messages. Each capability has a name and
+ * direction (upstream/downstream). Upstream messages are from
+ * voiceagents to Apps and downstream messages are Apps to voiceagents.
+ * This class will use a factory to create publisher and subcribers for
+ * each capability and create assiociations between them.
+ */
+class CapabilityMessagingService {
+public:
+  // Create a CapabilityMessagingService.
+  static std::unique_ptr<CapabilityMessagingService>
+  create(shared_ptr<vshl::common::interfaces::ILogger> logger,
+         shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+  // Subscribe to capability specific messages.
+  bool subscribe(vshl::common::interfaces::IAFBRequest &request,
+                 shared_ptr<common::interfaces::ICapability> capability,
+                 const string action);
+
+  // Publish capability messages.
+  bool publish(shared_ptr<common::interfaces::ICapability> capability,
+               const string action, const string payload);
+
+  // Destructor
+  ~CapabilityMessagingService();
+
+private:
+  // Constructor
+  CapabilityMessagingService(
+      shared_ptr<vshl::common::interfaces::ILogger> logger,
+      shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+  // Binding API reference
+  shared_ptr<vshl::common::interfaces::IAFBApi> mAfbApi;
+
+  // Create a message channel for the capability.
+  shared_ptr<vshl::capabilities::core::MessageChannel>
+  getMessageChannel(shared_ptr<common::interfaces::ICapability> capability);
+
+  // Map of capabilities to message channels.
+  unordered_map<string, shared_ptr<vshl::capabilities::core::MessageChannel>>
+      mMessageChannelsMap;
+
+  // Logger
+  shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+} // namespace capabilities
+} // namespace vshl
+
+#endif // VSHL_CAPABILITIES_CAPABILITYMESSAGINGSERVICE_H_
diff --git a/src/plugins/capabilities/communication/include/PhoneControlCapability.h b/src/plugins/capabilities/communication/include/PhoneControlCapability.h
new file mode 100644
index 0000000..55ada8d
--- /dev/null
+++ b/src/plugins/capabilities/communication/include/PhoneControlCapability.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#ifndef VSHL_CAPABILITIES_PHONECONTROL_CAPABILITY_H_
+#define VSHL_CAPABILITIES_PHONECONTROL_CAPABILITY_H_
+
+#include <memory>
+
+#include "interfaces/capabilities/ICapability.h"
+
+namespace vshl {
+namespace capabilities {
+namespace phonecontrol {
+
+/*
+ * PhoneControl capability. Calls are initiated in the endpoint.
+ */
+class PhoneControl : public common::interfaces::ICapability {
+public:
+    // Create a PhoneControl.
+    static std::shared_ptr<PhoneControl> create();
+
+    ~PhoneControl() = default;
+
+protected:
+    string getName() const override;
+
+    list<string> getUpstreamMessages() const override;
+
+    list<string> getDownstreamMessages() const override;
+
+private:
+    PhoneControl() = default;
+};
+
+}  // namespace phonecontrol
+}  // namespace capabilities
+}  // namespace vshl
+
+#endif  // VSHL_CAPABILITIES_PHONECONTROL_CAPABILITY_H_
diff --git a/src/plugins/capabilities/communication/include/PhoneControlMessages.h b/src/plugins/capabilities/communication/include/PhoneControlMessages.h
new file mode 100644
index 0000000..4c68455
--- /dev/null
+++ b/src/plugins/capabilities/communication/include/PhoneControlMessages.h
@@ -0,0 +1,128 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CAPABILITIES_PHONECONTROL_MESSAGES_H_
+#define VSHL_CAPABILITIES_PHONECONTROL_MESSAGES_H_
+
+#include <list>
+#include <string>
+
+using namespace std;
+
+namespace vshl {
+namespace capabilities {
+namespace phonecontrol {
+
+static string NAME = "phonecontrol";
+
+// Supported actions from VA -> Apps
+/* Dial message sent from VA to app handling the calling.
+ *
+ * Payload
+ *  {
+ *     "callId": "{{STRING}}",
+ *     "callee": {
+ *       "details": "{{STRING}}",
+ *       "defaultAddress": {
+ *         "protocol": "{{STRING}}",
+ *         "format": "{{STRING}}",
+ *         "value": "{{STRING}}"
+ *       },
+ *       "alternativeAddresses": [{
+ *         "protocol": "{{STRING}}",
+ *         "format": "{{STRING}}",
+ *         "value": {{STRING}}
+ *       }]
+ *     }
+ *   }
+ * }
+ *
+ * callId (required): A unique identifier for the call
+ * callee (required): The destination of the outgoing call
+ * callee.details (optional): Descriptive information about the callee
+ * callee.defaultAddress (required): The default address to use for calling the callee
+ * callee.alternativeAddresses (optional): An array of alternate addresses for the existing callee
+ * address.protocol (required): The protocol for this address of the callee (e.g. PSTN, SIP, H323, etc.)
+ * address.format (optional): The format for this address of the callee (e.g. E.164, E.163, E.123, DIN5008, etc.)
+ * address.value (required): The address of the callee.
+ *
+ */
+static string PHONECONTROL_DIAL = "dial";
+
+// Supported actions from Apps -> VA
+/*
+ *  App notifies the voiceagents of a change in connection state of a calling device.
+ *
+ *  Payload
+ *  {
+ *	    "state" : "{{STRING}}" // CONNECTED or DISCONNECTED
+ *  }
+ */
+static string PHONECONTROL_CONNECTIONSTATE_CHANGED = "connection_state_changed";
+/*
+ *  App notifies the voiceagents that call is activated
+ *
+ *  callId must match the one that is sent by VA with DIAL message above.
+ *
+ *  Payload
+ *  {
+ *	    "callId" : "{{STRING}}"
+ *  }
+ */
+static string PHONECONTROL_CALL_ACTIVATED = "call_activated";
+/*
+ *  App notifies the voiceagents of an error in initiating or maintaining a
+ *  call on a calling device
+ *
+ *  callId must match the one that is sent by VA with DIAL message above.
+ *  error: below status codes.
+ *     4xx: Validation failure for the input from the DIAL message
+ *     500: Internal error on the platform unrelated to the cellular network
+ *     503: Error on the platform related to the cellular network
+ *
+ *  Payload
+ *  {
+ *	    "callId" : "{{STRING}}"
+ *      "error"  : "{{STRING}}"
+ *  }
+ */
+static string PHONECONTROL_CALL_FAILED = "call_failed";
+/*
+ *  App notifies the voiceagents that call is terminated
+ *
+ *  callId must match the one that is sent by VA with DIAL message above.
+ *
+ *  Payload
+ *  {
+ *	    "callId" : "{{STRING}}"
+ *  }
+ */
+static string PHONECONTROL_CALL_TERMINATED = "call_terminated";
+
+// List of actions that are delivered from VA -> Apps
+static list<string> PHONECONTROL_UPSTREAM_ACTIONS = {
+    PHONECONTROL_DIAL,
+};
+
+// List of actions that are delivered from Apps -> VA
+static list<string> PHONECONTROL_DOWNSTREAM_ACTIONS = {PHONECONTROL_CONNECTIONSTATE_CHANGED,
+                                                       PHONECONTROL_CALL_ACTIVATED,
+                                                       PHONECONTROL_CALL_FAILED,
+                                                       PHONECONTROL_CALL_TERMINATED};
+
+}  // namespace phonecontrol
+}  // namespace capabilities
+}  // namespace vshl
+
+#endif  // VSHL_CAPABILITIES_PHONECONTROL_MESSAGES_H_
diff --git a/src/plugins/capabilities/communication/src/PhoneControlCapability.cpp b/src/plugins/capabilities/communication/src/PhoneControlCapability.cpp
new file mode 100644
index 0000000..6a74d5a
--- /dev/null
+++ b/src/plugins/capabilities/communication/src/PhoneControlCapability.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "capabilities/communication/include/PhoneControlCapability.h"
+#include "capabilities/communication/include/PhoneControlMessages.h"
+
+namespace vshl {
+namespace capabilities {
+namespace phonecontrol {
+
+// Create a phonecontrol.
+shared_ptr<PhoneControl> PhoneControl::create() {
+    auto phonecontrol = std::shared_ptr<PhoneControl>(new PhoneControl());
+    return phonecontrol;
+}
+
+string PhoneControl::getName() const {
+    return NAME;
+}
+
+list<string> PhoneControl::getUpstreamMessages() const {
+    return PHONECONTROL_UPSTREAM_ACTIONS;
+}
+
+list<string> PhoneControl::getDownstreamMessages() const {
+    return PHONECONTROL_DOWNSTREAM_ACTIONS;
+}
+
+}  // namespace phonecontrol
+}  // namespace capabilities
+}  // namespace vshl
diff --git a/src/plugins/capabilities/core/include/MessageChannel.h b/src/plugins/capabilities/core/include/MessageChannel.h
new file mode 100644
index 0000000..504e241
--- /dev/null
+++ b/src/plugins/capabilities/core/include/MessageChannel.h
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CAPABILITIES_CORE_MESSAGECHANNEL_H_
+#define VSHL_CAPABILITIES_CORE_MESSAGECHANNEL_H_
+
+#include <memory>
+
+#include "capabilities/core/include/PublisherForwarder.h"
+#include "capabilities/core/include/SubscriberForwarder.h"
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/capabilities/ICapability.h"
+#include "interfaces/utilities/logging/ILogger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace capabilities {
+namespace core {
+/*
+ * MessageChannel has one end as publisher forwarder and the other end
+ * as subscriber forwarder.
+ */
+class MessageChannel {
+public:
+  // Create a MessageChannel.
+  static std::shared_ptr<MessageChannel>
+  create(shared_ptr<vshl::common::interfaces::ILogger> logger,
+         shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+         shared_ptr<vshl::common::interfaces::ICapability> capability);
+
+  // Sends the message
+  bool publish(const string action, const string payload);
+
+  // Subscribe
+  bool subscribe(vshl::common::interfaces::IAFBRequest &request,
+                 const string action);
+
+  // Destructor
+  virtual ~MessageChannel() = default;
+
+private:
+  // Constructor
+  MessageChannel(shared_ptr<vshl::common::interfaces::ILogger> logger,
+                 shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+                 shared_ptr<vshl::common::interfaces::ICapability> capability);
+
+  // Forwarders
+  shared_ptr<PublisherForwarder> mPublisherForwarder;
+  shared_ptr<SubscriberForwarder> mSubscriberForwarder;
+};
+
+} // namespace core
+} // namespace capabilities
+} // namespace vshl
+
+#endif // VSHL_CAPABILITIES_CORE_MESSAGECHANNEL_H_
diff --git a/src/plugins/capabilities/core/include/PublisherForwarder.h b/src/plugins/capabilities/core/include/PublisherForwarder.h
new file mode 100644
index 0000000..9cc89b5
--- /dev/null
+++ b/src/plugins/capabilities/core/include/PublisherForwarder.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CAPABILITIES_CORE_PUBLISHERFORWARDER_H_
+#define VSHL_CAPABILITIES_CORE_PUBLISHERFORWARDER_H_
+
+#include <memory>
+
+#include "capabilities/core/include/SubscriberForwarder.h"
+
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/capabilities/ICapability.h"
+#include "interfaces/utilities/logging/ILogger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace capabilities {
+namespace core {
+/*
+ * This class is responsible for forwarding the messages to be published
+ * to subscriber forwarder. Subscriber forwarder will deliver the messages
+ * as AFB Events to all the subscribed clients.
+ * There is one PublisherForwarder and one SubscriberForwarder per capability.
+ */
+class PublisherForwarder {
+public:
+    // Create a PublisherForwarder.
+    static std::shared_ptr<PublisherForwarder> create(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::ICapability> capability);
+
+    // Connect a subscriber forwarder to this publisher forwarder
+    void setSubscriberForwarder(shared_ptr<SubscriberForwarder> subscriberForwarder);
+
+    // Forward message to the subscriber forwarder
+    bool forwardMessage(const string action, const string payload);
+
+    // Destructor
+    ~PublisherForwarder();
+
+private:
+    // Constructor
+    PublisherForwarder(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::ICapability> capability);
+
+    // Subscriber forwarder connected to this publisher forwarder.
+    shared_ptr<SubscriberForwarder> mSubscriberForwarder;
+
+    // Capability
+    shared_ptr<vshl::common::interfaces::ICapability> mCapability;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace core
+}  // namespace capabilities
+}  // namespace vshl
+
+#endif  // VSHL_CAPABILITIES_CORE_PUBLISHERFORWARDER_H_
diff --git a/src/plugins/capabilities/core/include/SubscriberForwarder.h b/src/plugins/capabilities/core/include/SubscriberForwarder.h
new file mode 100644
index 0000000..94c04bf
--- /dev/null
+++ b/src/plugins/capabilities/core/include/SubscriberForwarder.h
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CAPABILITIES_CORE_SUBSCRIBERFORWARDER_H_
+#define VSHL_CAPABILITIES_CORE_SUBSCRIBERFORWARDER_H_
+
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/capabilities/ICapability.h"
+#include "interfaces/utilities/logging/ILogger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace capabilities {
+namespace core {
+/*
+ * This class is responsible for forwarding the messages publishing
+ * to the actual clients using AFB.
+ */
+class SubscriberForwarder {
+public:
+  // Create a SubscriberForwarder.
+  static std::shared_ptr<SubscriberForwarder>
+  create(shared_ptr<vshl::common::interfaces::ILogger> logger,
+         shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+         shared_ptr<vshl::common::interfaces::ICapability> capability);
+
+  // Publish a capability message to the actual client.
+  bool forwardMessage(const string action, const string payload);
+
+  // Subscribe
+  bool subscribe(vshl::common::interfaces::IAFBRequest &request,
+                 const string action);
+
+  // Destructor
+  ~SubscriberForwarder();
+
+private:
+  // Constructor
+  SubscriberForwarder(
+      shared_ptr<vshl::common::interfaces::ILogger> logger,
+      shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+      shared_ptr<vshl::common::interfaces::ICapability> capability);
+
+  // Creates both upstream and downstream events
+  void createEvents();
+
+  // Binding API reference
+  shared_ptr<vshl::common::interfaces::IAFBApi> mAfbApi;
+
+  // Capability
+  shared_ptr<vshl::common::interfaces::ICapability> mCapability;
+
+  // Maps of capability action events to its corresponding Event object.
+  // Event name maps to Action Name
+  unordered_map<string, shared_ptr<common::interfaces::IAFBApi::IAFBEvent>>
+      mUpstreamEventsMap;
+  unordered_map<string, shared_ptr<common::interfaces::IAFBApi::IAFBEvent>>
+      mDownstreamEventsMap;
+
+  // Logger
+  shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+} // namespace core
+} // namespace capabilities
+} // namespace vshl
+
+#endif // VSHL_CAPABILITIES_CORE_SUBSCRIBERFORWARDER_H_
diff --git a/src/plugins/capabilities/core/src/MessageChannel.cpp b/src/plugins/capabilities/core/src/MessageChannel.cpp
new file mode 100644
index 0000000..eaa1349
--- /dev/null
+++ b/src/plugins/capabilities/core/src/MessageChannel.cpp
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "capabilities/core/include/MessageChannel.h"
+
+namespace vshl {
+namespace capabilities {
+namespace core {
+
+// Create a MessageChannel.
+std::shared_ptr<MessageChannel> MessageChannel::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> api,
+    shared_ptr<vshl::common::interfaces::ICapability> capability) {
+    auto messageChannel = std::shared_ptr<MessageChannel>(new MessageChannel(logger, api, capability));
+    return messageChannel;
+}
+
+MessageChannel::MessageChannel(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> api,
+    shared_ptr<vshl::common::interfaces::ICapability> capability) {
+    // Subscriber forwarder
+    mSubscriberForwarder = SubscriberForwarder::create(logger, api, capability);
+    // Publisher forwarder
+    mPublisherForwarder = PublisherForwarder::create(logger, capability);
+    mPublisherForwarder->setSubscriberForwarder(mSubscriberForwarder);
+}
+
+bool MessageChannel::publish(const string action, const string payload) {
+    return mPublisherForwarder->forwardMessage(action, payload);
+}
+
+bool MessageChannel::subscribe(vshl::common::interfaces::IAFBRequest& request, const string action) {
+    return mSubscriberForwarder->subscribe(request, action);
+}
+
+}  // namespace core
+}  // namespace capabilities
+}  // namespace vshl
diff --git a/src/plugins/capabilities/core/src/PublisherForwarder.cpp b/src/plugins/capabilities/core/src/PublisherForwarder.cpp
new file mode 100644
index 0000000..81de6a0
--- /dev/null
+++ b/src/plugins/capabilities/core/src/PublisherForwarder.cpp
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "capabilities/core/include/PublisherForwarder.h"
+
+static string TAG = "vshl::capabilities::PublisherForwarder";
+
+using Level = vshl::common::interfaces::ILogger::Level;
+
+namespace vshl {
+namespace capabilities {
+namespace core {
+
+// Create a PublisherForwarder.
+std::shared_ptr<PublisherForwarder> PublisherForwarder::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::ICapability> capability) {
+    if (logger == nullptr) {
+        return nullptr;
+    }
+
+    if (capability == nullptr) {
+        logger->log(Level::ERROR, TAG, "Failed to create PublisherForwarder: Capability null");
+        return nullptr;
+    }
+
+    auto publisherForwarder = std::shared_ptr<PublisherForwarder>(new PublisherForwarder(logger, capability));
+    return publisherForwarder;
+}
+
+// Constructor
+PublisherForwarder::PublisherForwarder(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::ICapability> capability) {
+    mCapability = capability;
+    mLogger = logger;
+}
+
+// Destructor
+PublisherForwarder::~PublisherForwarder() {
+}
+
+void PublisherForwarder::setSubscriberForwarder(shared_ptr<SubscriberForwarder> subscriberForwarder) {
+    mSubscriberForwarder = subscriberForwarder;
+}
+
+bool PublisherForwarder::forwardMessage(const string action, const string payload) {
+    if (!mSubscriberForwarder) {
+        mLogger->log(Level::ERROR, TAG, "Failed to forward message for capability: " + mCapability->getName());
+        return false;
+    }
+
+    return mSubscriberForwarder->forwardMessage(action, payload);
+}
+
+}  // namespace core
+}  // namespace capabilities
+}  // namespace vshl
diff --git a/src/plugins/capabilities/core/src/SubscriberForwarder.cpp b/src/plugins/capabilities/core/src/SubscriberForwarder.cpp
new file mode 100644
index 0000000..ea42305
--- /dev/null
+++ b/src/plugins/capabilities/core/src/SubscriberForwarder.cpp
@@ -0,0 +1,139 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "capabilities/core/include/SubscriberForwarder.h"
+
+static string TAG = "vshl::capabilities::SubscriberForwarder";
+
+using Level = vshl::common::interfaces::ILogger::Level;
+
+namespace vshl {
+namespace capabilities {
+namespace core {
+
+// Create a SubscriberForwarder.
+std::shared_ptr<SubscriberForwarder> SubscriberForwarder::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+    shared_ptr<vshl::common::interfaces::ICapability> capability) {
+    if (logger == nullptr) {
+        return nullptr;
+    }
+
+    if (afbApi == nullptr) {
+        logger->log(Level::ERROR, TAG, "Failed to create SubscriberForwarder: AFB API null");
+        return nullptr;
+    }
+
+    if (capability == nullptr) {
+        logger->log(Level::ERROR, TAG, "Failed to create SubscriberForwarder: Capability null");
+        return nullptr;
+    }
+
+    auto subscriberForwarder =
+        std::shared_ptr<SubscriberForwarder>(new SubscriberForwarder(logger, afbApi, capability));
+    return subscriberForwarder;
+}
+
+SubscriberForwarder::SubscriberForwarder(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+    shared_ptr<vshl::common::interfaces::ICapability> capability) :
+        mAfbApi(afbApi),
+        mLogger(logger),
+        mCapability(capability) {
+    createEvents();
+}
+
+SubscriberForwarder::~SubscriberForwarder() {
+    mUpstreamEventsMap.clear();
+    mDownstreamEventsMap.clear();
+}
+
+void SubscriberForwarder::createEvents() {
+    if (!mCapability) {
+        mLogger->log(Level::NOTICE, TAG, "Create Events failed. No capability assigned.");
+        return;
+    }
+
+    // Upstream events
+    auto upstreamEvents = mCapability->getUpstreamMessages();
+    for (auto upstreamEventName : upstreamEvents) {
+        auto it = mUpstreamEventsMap.find(upstreamEventName);
+        if (it == mUpstreamEventsMap.end() && mAfbApi) {
+            // create a new event and add it to the map.
+            shared_ptr<common::interfaces::IAFBApi::IAFBEvent> event = mAfbApi->createEvent(upstreamEventName);
+            if (event == nullptr) {
+                mLogger->log(Level::ERROR, TAG, "Failed to create upstream event: " + upstreamEventName);
+            } else {
+                mUpstreamEventsMap.insert(make_pair(upstreamEventName, event));
+            }
+        }
+    }
+
+    // Downstream events
+    auto downstreamEvents = mCapability->getDownstreamMessages();
+    for (auto downstreamEventName : downstreamEvents) {
+        auto it = mDownstreamEventsMap.find(downstreamEventName);
+        if (it == mDownstreamEventsMap.end() && mAfbApi) {
+            // create a new event and add it to the map.
+            shared_ptr<common::interfaces::IAFBApi::IAFBEvent> event = mAfbApi->createEvent(downstreamEventName);
+            if (event == nullptr) {
+                mLogger->log(Level::ERROR, TAG, "Failed to create downstream event: " + downstreamEventName);
+            } else {
+                mDownstreamEventsMap.insert(make_pair(downstreamEventName, event));
+            }
+        }
+    }
+}
+
+bool SubscriberForwarder::forwardMessage(const string action, const string payload) {
+    auto upstreamEventIt = mUpstreamEventsMap.find(action);
+    if (upstreamEventIt != mUpstreamEventsMap.end()) {
+        mLogger->log(Level::NOTICE, TAG, "Publishing upstream event: " + action);
+        upstreamEventIt->second->publishEvent(json_object_new_string(payload.c_str()));
+        return true;
+    }
+
+    auto downstreamEventIt = mDownstreamEventsMap.find(action);
+    if (downstreamEventIt != mDownstreamEventsMap.end()) {
+        mLogger->log(Level::NOTICE, TAG, "Publishing downstream event: " + action);
+        downstreamEventIt->second->publishEvent(json_object_new_string(payload.c_str()));
+        return true;
+    }
+
+    mLogger->log(Level::NOTICE, TAG, "Failed to publish upstream event: " + action);
+    return false;
+}
+
+bool SubscriberForwarder::subscribe(vshl::common::interfaces::IAFBRequest& request, const string action) {
+    auto upstreamEventIt = mUpstreamEventsMap.find(action);
+    if (upstreamEventIt != mUpstreamEventsMap.end()) {
+        mLogger->log(Level::NOTICE, TAG, "Subscribing to upstream event: " + action);
+        return upstreamEventIt->second->subscribe(request);
+    }
+
+    auto downstreamEventIt = mDownstreamEventsMap.find(action);
+    if (downstreamEventIt != mDownstreamEventsMap.end()) {
+        mLogger->log(Level::NOTICE, TAG, "Subscribing to downstream event: " + action);
+        return downstreamEventIt->second->subscribe(request);
+    }
+
+    mLogger->log(Level::NOTICE, TAG, "Failed to subscribe to upstream event: " + action);
+    return false;
+}
+
+}  // namespace core
+}  // namespace capabilities
+}  // namespace vshl
diff --git a/src/plugins/capabilities/guimetadata/include/GuiMetadataCapability.h b/src/plugins/capabilities/guimetadata/include/GuiMetadataCapability.h
new file mode 100644
index 0000000..199f49a
--- /dev/null
+++ b/src/plugins/capabilities/guimetadata/include/GuiMetadataCapability.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#ifndef VSHL_CAPABILITIES_GUIMETADATA_CAPABILITY_H_
+#define VSHL_CAPABILITIES_GUIMETADATA_CAPABILITY_H_
+
+#include <memory>
+
+#include "interfaces/capabilities/ICapability.h"
+
+namespace vshl {
+namespace capabilities {
+namespace guimetadata {
+
+/*
+ * GuiMetadata capability
+ */
+class GuiMetadata : public common::interfaces::ICapability {
+public:
+    // Create a GuiMetadata.
+    static std::shared_ptr<GuiMetadata> create();
+
+    ~GuiMetadata() = default;
+
+protected:
+    string getName() const override;
+
+    list<string> getUpstreamMessages() const override;
+
+    list<string> getDownstreamMessages() const override;
+
+private:
+    GuiMetadata() = default;
+};
+
+}  // namespace guimetadata
+}  // namespace capabilities
+}  // namespace vshl
+
+#endif  // VSHL_CAPABILITIES_GUIMETADATA_CAPABILITY_H_
diff --git a/src/plugins/capabilities/guimetadata/include/GuiMetadataMessages.h b/src/plugins/capabilities/guimetadata/include/GuiMetadataMessages.h
new file mode 100644
index 0000000..783b401
--- /dev/null
+++ b/src/plugins/capabilities/guimetadata/include/GuiMetadataMessages.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CAPABILITIES_GUIMETADATA_ACTIONS_H_
+#define VSHL_CAPABILITIES_GUIMETADATA_ACTIONS_H_
+
+#include <list>
+#include <string>
+
+using namespace std;
+
+namespace vshl {
+namespace capabilities {
+namespace guimetadata {
+
+static string NAME = "guimetadata";
+
+// Supported actions from VA -> Apps
+static string GUIMETADATA_RENDER_TEMPLATE = "render_template";
+static string GUIMETADATA_CLEAR_TEMPLATE = "clear_template";
+static string GUIMETADATA_RENDER_PLAYER_INFO = "render_player_info";
+static string GUIMETADATA_CLEAR_PLAYER_INFO = "clear_player_info";
+
+// Supported actions from Apps -> VA
+
+// List of actions that are delivered from VA -> Apps
+static list<string> GUIMETADATA_UPSTREAM_ACTIONS = {GUIMETADATA_RENDER_TEMPLATE,
+                                                    GUIMETADATA_CLEAR_TEMPLATE,
+                                                    GUIMETADATA_RENDER_PLAYER_INFO,
+                                                    GUIMETADATA_CLEAR_PLAYER_INFO};
+
+// List of actions that are delivered from Apps -> VA
+static list<string> GUIMETADATA_DOWNSTREAM_ACTIONS = {};
+
+}  // namespace guimetadata
+}  // namespace capabilities
+}  // namespace vshl
+
+#endif  // VSHL_CAPABILITIES_GUIMETADATA_ACTIONS_H_
diff --git a/src/plugins/capabilities/guimetadata/src/GuiMetadataCapability.cpp b/src/plugins/capabilities/guimetadata/src/GuiMetadataCapability.cpp
new file mode 100644
index 0000000..106fe99
--- /dev/null
+++ b/src/plugins/capabilities/guimetadata/src/GuiMetadataCapability.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "capabilities/guimetadata/include/GuiMetadataCapability.h"
+#include "capabilities/guimetadata/include/GuiMetadataMessages.h"
+
+namespace vshl {
+namespace capabilities {
+namespace guimetadata {
+
+// Create a GuiMetadata.
+shared_ptr<GuiMetadata> GuiMetadata::create() {
+    auto guiMetadata = std::shared_ptr<GuiMetadata>(new GuiMetadata());
+    return guiMetadata;
+}
+
+string GuiMetadata::getName() const {
+    return NAME;
+}
+
+list<string> GuiMetadata::getUpstreamMessages() const {
+    return GUIMETADATA_UPSTREAM_ACTIONS;
+}
+
+list<string> GuiMetadata::getDownstreamMessages() const {
+    return GUIMETADATA_DOWNSTREAM_ACTIONS;
+}
+
+}  // namespace guimetadata
+}  // namespace capabilities
+}  // namespace vshl
diff --git a/src/plugins/capabilities/navigation/include/NavigationCapability.h b/src/plugins/capabilities/navigation/include/NavigationCapability.h
new file mode 100644
index 0000000..66109d5
--- /dev/null
+++ b/src/plugins/capabilities/navigation/include/NavigationCapability.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#ifndef VSHL_CAPABILITIES_NAVIGATION_CAPABILITY_H_
+#define VSHL_CAPABILITIES_NAVIGATION_CAPABILITY_H_
+
+#include <memory>
+
+#include "interfaces/capabilities/ICapability.h"
+
+namespace vshl {
+namespace capabilities {
+namespace navigation {
+
+/*
+ * Navigation capability
+ */
+class Navigation : public common::interfaces::ICapability {
+public:
+  // Create a Navigation.
+  static std::shared_ptr<Navigation> create();
+
+  ~Navigation() = default;
+
+protected:
+  string getName() const override;
+
+  list<string> getUpstreamMessages() const override;
+
+  list<string> getDownstreamMessages() const override;
+
+private:
+  Navigation() = default;
+};
+
+} // namespace navigation
+} // namespace capabilities
+} // namespace vshl
+
+#endif // VSHL_CAPABILITIES_NAVIGATION_CAPABILITY_H_
diff --git a/src/plugins/capabilities/navigation/include/NavigationMessages.h b/src/plugins/capabilities/navigation/include/NavigationMessages.h
new file mode 100644
index 0000000..aed9b9e
--- /dev/null
+++ b/src/plugins/capabilities/navigation/include/NavigationMessages.h
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CAPABILITIES_NAVIGATION_ACTIONS_H_
+#define VSHL_CAPABILITIES_NAVIGATION_ACTIONS_H_
+
+#include <list>
+#include <string>
+
+using namespace std;
+
+namespace vshl {
+namespace capabilities {
+namespace navigation {
+
+static string NAME = "navigation";
+
+// Supported actions from VA -> Apps
+static string NAVIGATION_SET_DESTINATION = "set_destination";
+static string NAVIGATION_CANCEL = "cancel_navigation";
+
+// Supported actions from Apps -> VA
+
+// List of actions that are delivered from VA -> Apps
+static list<string> NAVIGATION_UPSTREAM_ACTIONS = {
+    NAVIGATION_SET_DESTINATION,
+    NAVIGATION_CANCEL,
+};
+
+// List of actions that are delivered from Apps -> VA
+static list<string> NAVIGATION_DOWNSTREAM_ACTIONS = {};
+
+}  // namespace navigation
+}  // namespace capabilities
+}  // namespace vshl
+
+#endif  // VSHL_CAPABILITIES_NAVIGATION_ACTIONS_H_
diff --git a/src/plugins/capabilities/navigation/src/NavigationCapability.cpp b/src/plugins/capabilities/navigation/src/NavigationCapability.cpp
new file mode 100644
index 0000000..d4a5119
--- /dev/null
+++ b/src/plugins/capabilities/navigation/src/NavigationCapability.cpp
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "capabilities/navigation/include/NavigationCapability.h"
+#include "capabilities/navigation/include/NavigationMessages.h"
+
+namespace vshl {
+namespace capabilities {
+namespace navigation {
+
+// Create a Navigation.
+shared_ptr<Navigation> Navigation::create() {
+    auto navigation = std::shared_ptr<Navigation>(new Navigation());
+    return navigation;
+}
+
+string Navigation::getName() const {
+    return NAME;
+}
+
+list<string> Navigation::getUpstreamMessages() const {
+    return NAVIGATION_UPSTREAM_ACTIONS;
+}
+
+list<string> Navigation::getDownstreamMessages() const {
+    return NAVIGATION_DOWNSTREAM_ACTIONS;
+}
+
+}  // namespace navigation
+}  // namespace capabilities
+}  // namespace vshl
diff --git a/src/plugins/capabilities/test/CapabilityMessagingServiceTest.cpp b/src/plugins/capabilities/test/CapabilityMessagingServiceTest.cpp
new file mode 100644
index 0000000..741a8aa
--- /dev/null
+++ b/src/plugins/capabilities/test/CapabilityMessagingServiceTest.cpp
@@ -0,0 +1,96 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include <gtest/gtest.h>
+
+#include "capabilities/CapabilityMessagingService.h"
+
+#include "test/common/ConsoleLogger.h"
+#include "test/mocks/AFBApiMock.h"
+#include "test/mocks/AFBEventMock.h"
+#include "test/mocks/AFBRequestMock.h"
+#include "test/mocks/CapabilityMock.h"
+
+using namespace vshl::common::interfaces;
+using namespace vshl::capabilities;
+using namespace vshl::test::common;
+
+namespace vshl {
+namespace test {
+
+class CapabilityMessagingServiceTest : public ::testing::Test {
+protected:
+    void SetUp() override {
+        mConsoleLogger = std::make_shared<ConsoleLogger>();
+        mAfbApi = std::make_shared<::testing::NiceMock<AFBApiMock>>();
+    }
+
+    std::shared_ptr<::testing::NiceMock<AFBApiMock>> mAfbApi;
+    std::shared_ptr<ConsoleLogger> mConsoleLogger;
+};
+
+TEST_F(CapabilityMessagingServiceTest, failsInitializationOnInvalidParams) {
+    auto service = CapabilityMessagingService::create(mConsoleLogger, nullptr);
+    ASSERT_EQ(service, nullptr);
+
+    service = CapabilityMessagingService::create(nullptr, mAfbApi);
+    ASSERT_EQ(service, nullptr);
+}
+
+TEST_F(CapabilityMessagingServiceTest, initializesSuccessfully) {
+    auto service = CapabilityMessagingService::create(mConsoleLogger, mAfbApi);
+    ASSERT_NE(service, nullptr);
+}
+
+TEST_F(CapabilityMessagingServiceTest, canSubscribeAndPublishCapabilityEvents) {
+    auto service = CapabilityMessagingService::create(mConsoleLogger, mAfbApi);
+
+    auto capability = std::make_shared<::testing::NiceMock<CapabilityMock>>();
+    std::list<std::string> upstreamEvents({"up-ev1", "up-ev2"});
+    std::list<std::string> downstreamEvents({"down-ev1", "down-ev2"});
+    std::string capabilityName = "weather";
+
+    ON_CALL(*capability, getName()).WillByDefault(::testing::Return(capabilityName));
+    ON_CALL(*capability, getUpstreamMessages()).WillByDefault(::testing::Return(upstreamEvents));
+    ON_CALL(*capability, getDownstreamMessages()).WillByDefault(::testing::Return(downstreamEvents));
+
+    // We don't care if and how many times subscribe method is called on event.
+    std::shared_ptr<AFBEventMock> mockEvent(new ::testing::NiceMock<AFBEventMock>());
+    ON_CALL(*mockEvent, subscribe(::testing::_)).WillByDefault(::testing::Return(true));
+    ON_CALL(*mockEvent, publishEvent(::testing::_)).WillByDefault(::testing::Return(true));
+    auto eventCreator = [mockEvent](const std::string& eventName) -> std::shared_ptr<IAFBApi::IAFBEvent> {
+        mockEvent->setName(eventName);
+        return mockEvent;
+    };
+
+    ON_CALL(*mAfbApi, createEvent(::testing::_)).WillByDefault(::testing::Invoke(eventCreator));
+
+    auto request = std::make_shared<::testing::StrictMock<AFBRequestMock>>();
+    std::string payload = "The answer to life the universe and everything = 42";
+
+    bool result = service->publish(capability, *upstreamEvents.begin(), payload);
+    ASSERT_FALSE(result);  // Without subscribing to the event. Publish should fail.
+
+    result = service->subscribe(*request, capability, *upstreamEvents.begin());
+    ASSERT_TRUE(result);
+
+    result = service->subscribe(*request, capability, *downstreamEvents.begin());
+    ASSERT_TRUE(result);
+
+    result = service->publish(capability, *downstreamEvents.begin(), payload);
+    ASSERT_TRUE(result);
+}
+
+}  // namespace test
+}  // namespace vshl
\ No newline at end of file
diff --git a/src/plugins/capabilities/test/PublisherForwarderTest.cpp b/src/plugins/capabilities/test/PublisherForwarderTest.cpp
new file mode 100644
index 0000000..d0ba319
--- /dev/null
+++ b/src/plugins/capabilities/test/PublisherForwarderTest.cpp
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include <gtest/gtest.h>
+
+#include "capabilities/core/include/PublisherForwarder.h"
+#include "capabilities/core/include/SubscriberForwarder.h"
+
+#include "test/common/ConsoleLogger.h"
+#include "test/mocks/AFBApiMock.h"
+#include "test/mocks/AFBEventMock.h"
+#include "test/mocks/CapabilityMock.h"
+
+using namespace vshl::common::interfaces;
+using namespace vshl::capabilities::core;
+using namespace vshl::test::common;
+
+namespace vshl {
+namespace test {
+
+class PublisherForwarderTest : public ::testing::Test {
+protected:
+    void SetUp() override {
+        mConsoleLogger = std::make_shared<ConsoleLogger>();
+        mAfbApi = std::make_shared<::testing::StrictMock<AFBApiMock>>();
+
+        mEventCreatorFn = [](const std::string& eventName) -> std::shared_ptr<IAFBApi::IAFBEvent> {
+            std::shared_ptr<AFBEventMock> mockEvent(new ::testing::StrictMock<AFBEventMock>());
+            mockEvent->setName(eventName);
+            return mockEvent;
+        };
+    }
+
+    std::shared_ptr<SubscriberForwarder> createSubscriberForwarder(
+        std::shared_ptr<::testing::StrictMock<CapabilityMock>> capability) {
+        EXPECT_CALL(*capability, getUpstreamMessages()).Times(1);
+        EXPECT_CALL(*capability, getDownstreamMessages()).Times(1);
+
+        return SubscriberForwarder::create(mConsoleLogger, mAfbApi, capability);
+    }
+
+    std::shared_ptr<PublisherForwarder> createPublisherForwarder(
+        std::shared_ptr<::testing::StrictMock<CapabilityMock>> capability) {
+        return PublisherForwarder::create(mConsoleLogger, capability);
+    }
+
+    std::shared_ptr<::testing::StrictMock<AFBApiMock>> mAfbApi;
+    std::shared_ptr<ConsoleLogger> mConsoleLogger;
+    std::function<std::shared_ptr<IAFBApi::IAFBEvent>(const std::string&)> mEventCreatorFn;
+    std::shared_ptr<::testing::StrictMock<AFBEventMock>> mAfbEventMock;
+};
+
+TEST_F(PublisherForwarderTest, failsInitializationOnInvalidParams) {
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+
+    auto forwarder = PublisherForwarder::create(mConsoleLogger, nullptr);
+    ASSERT_EQ(forwarder, nullptr);
+
+    forwarder = PublisherForwarder::create(nullptr, capability);
+    ASSERT_EQ(forwarder, nullptr);
+}
+
+TEST_F(PublisherForwarderTest, initializesCorrectly) {
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    auto forwarder = createPublisherForwarder(capability);
+
+    ASSERT_NE(forwarder, nullptr);
+}
+
+TEST_F(PublisherForwarderTest, canForwardMessages) {
+    std::shared_ptr<AFBEventMock> mockEvent(new ::testing::StrictMock<AFBEventMock>());
+    ON_CALL(*mockEvent, publishEvent(::testing::_)).WillByDefault(::testing::Return(true));
+    EXPECT_CALL(*mockEvent, publishEvent(::testing::_)).Times(4);
+    auto eventCreator = [mockEvent](const std::string& eventName) -> std::shared_ptr<IAFBApi::IAFBEvent> {
+        return mockEvent;
+    };
+
+    ON_CALL(*mAfbApi, createEvent(::testing::_)).WillByDefault(::testing::Invoke(eventCreator));
+    EXPECT_CALL(*mAfbApi, createEvent(::testing::_)).Times(4);
+
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    std::list<std::string> upstreamEvents({"up-ev1", "up-ev2"});
+    std::list<std::string> downstreamEvents({"down-ev1", "down-ev2"});
+    ON_CALL(*capability, getUpstreamMessages()).WillByDefault(::testing::Return(upstreamEvents));
+    ON_CALL(*capability, getDownstreamMessages()).WillByDefault(::testing::Return(downstreamEvents));
+
+    auto publisherForwarder = createPublisherForwarder(capability);
+    ASSERT_NE(publisherForwarder, nullptr);
+
+    auto subscriberForwarder = createSubscriberForwarder(capability);
+    ASSERT_NE(subscriberForwarder, nullptr);
+
+    std::string payload = "The answer to life the universe and everything = 42";
+    publisherForwarder->setSubscriberForwarder(subscriberForwarder);
+
+    auto itCapability = downstreamEvents.begin();
+    ASSERT_TRUE(publisherForwarder->forwardMessage(*itCapability++, payload));
+    ASSERT_TRUE(publisherForwarder->forwardMessage(*itCapability++, payload));
+    itCapability = upstreamEvents.begin();
+    ASSERT_TRUE(publisherForwarder->forwardMessage(*itCapability++, payload));
+    ASSERT_TRUE(publisherForwarder->forwardMessage(*itCapability++, payload));
+}
+
+}  // namespace test
+}  // namespace vshl
\ No newline at end of file
diff --git a/src/plugins/capabilities/test/SubscriberForwarderTest.cpp b/src/plugins/capabilities/test/SubscriberForwarderTest.cpp
new file mode 100644
index 0000000..ff438df
--- /dev/null
+++ b/src/plugins/capabilities/test/SubscriberForwarderTest.cpp
@@ -0,0 +1,262 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include <gtest/gtest.h>
+
+#include "capabilities/core/include/SubscriberForwarder.h"
+
+#include "test/common/ConsoleLogger.h"
+#include "test/mocks/AFBApiMock.h"
+#include "test/mocks/AFBEventMock.h"
+#include "test/mocks/AFBRequestMock.h"
+#include "test/mocks/CapabilityMock.h"
+
+using namespace vshl::common::interfaces;
+using namespace vshl::capabilities::core;
+using namespace vshl::test::common;
+
+namespace vshl {
+namespace test {
+
+class SubscriberForwarderTest : public ::testing::Test {
+protected:
+    void SetUp() override {
+        mConsoleLogger = std::make_shared<ConsoleLogger>();
+        mAfbApi = std::make_shared<::testing::StrictMock<AFBApiMock>>();
+
+        mEventCreatorFn = [](const std::string& eventName) -> std::shared_ptr<IAFBApi::IAFBEvent> {
+            std::shared_ptr<AFBEventMock> mockEvent(new ::testing::StrictMock<AFBEventMock>());
+            mockEvent->setName(eventName);
+            return mockEvent;
+        };
+    }
+
+    std::shared_ptr<SubscriberForwarder> createSubscriberForwarder(
+        std::shared_ptr<::testing::StrictMock<CapabilityMock>> capability) {
+        EXPECT_CALL(*capability, getUpstreamMessages()).Times(1);
+        EXPECT_CALL(*capability, getDownstreamMessages()).Times(1);
+
+        return SubscriberForwarder::create(mConsoleLogger, mAfbApi, capability);
+    }
+
+    std::shared_ptr<::testing::StrictMock<AFBApiMock>> mAfbApi;
+    std::shared_ptr<ConsoleLogger> mConsoleLogger;
+    std::function<std::shared_ptr<IAFBApi::IAFBEvent>(const std::string&)> mEventCreatorFn;
+    std::shared_ptr<::testing::StrictMock<AFBEventMock>> mAfbEventMock;
+};
+
+TEST_F(SubscriberForwarderTest, failsInitializationOnInvalidParams) {
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+
+    auto forwarder = SubscriberForwarder::create(mConsoleLogger, mAfbApi, nullptr);
+    ASSERT_EQ(forwarder, nullptr);
+
+    forwarder = SubscriberForwarder::create(mConsoleLogger, nullptr, capability);
+    ASSERT_EQ(forwarder, nullptr);
+
+    forwarder = SubscriberForwarder::create(nullptr, mAfbApi, capability);
+    ASSERT_EQ(forwarder, nullptr);
+}
+
+TEST_F(SubscriberForwarderTest, initializesCorrectly) {
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    auto forwarder = createSubscriberForwarder(capability);
+
+    ASSERT_NE(forwarder, nullptr);
+}
+
+TEST_F(SubscriberForwarderTest, createsEventsOnInitialization) {
+    ON_CALL(*mAfbApi, createEvent(::testing::_)).WillByDefault(::testing::Invoke(mEventCreatorFn));
+
+    std::list<std::string> upstreamEvents({"up-ev1", "up-ev2"});
+    std::list<std::string> downstreamEvents({"down-ev1", "down-ev2"});
+
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    ON_CALL(*capability, getUpstreamMessages()).WillByDefault(::testing::Return(upstreamEvents));
+    ON_CALL(*capability, getDownstreamMessages()).WillByDefault(::testing::Return(downstreamEvents));
+
+    auto itCapability = upstreamEvents.begin();
+    EXPECT_CALL(*mAfbApi, createEvent(*itCapability)).Times(1);
+    itCapability++;
+    EXPECT_CALL(*mAfbApi, createEvent(*itCapability)).Times(1);
+
+    itCapability = downstreamEvents.begin();
+    EXPECT_CALL(*mAfbApi, createEvent(*itCapability)).Times(1);
+    itCapability++;
+    EXPECT_CALL(*mAfbApi, createEvent(*itCapability)).Times(1);
+
+    auto forwarder = createSubscriberForwarder(capability);
+    ASSERT_NE(forwarder, nullptr);
+}
+
+TEST_F(SubscriberForwarderTest, canNotSubscribeToNonExistentEvents) {
+    ON_CALL(*mAfbApi, createEvent(::testing::_)).WillByDefault(::testing::Invoke(mEventCreatorFn));
+    EXPECT_CALL(*mAfbApi, createEvent(::testing::_)).Times(4);
+
+    std::list<std::string> upstreamEvents({"up-ev1", "up-ev2"});
+    std::list<std::string> downstreamEvents({"down-ev1", "down-ev2"});
+
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    ON_CALL(*capability, getUpstreamMessages()).WillByDefault(::testing::Return(upstreamEvents));
+    ON_CALL(*capability, getDownstreamMessages()).WillByDefault(::testing::Return(downstreamEvents));
+
+    auto forwarder = createSubscriberForwarder(capability);
+    ASSERT_NE(forwarder, nullptr);
+
+    auto nonExistentEvents = std::list<std::string>({"non", "existent", "events"});
+    auto itCapability = nonExistentEvents.begin();
+    auto request = std::make_shared<::testing::StrictMock<AFBRequestMock>>();
+    ASSERT_FALSE(forwarder->subscribe(*request, *itCapability++));
+    ASSERT_FALSE(forwarder->subscribe(*request, *itCapability++));
+    ASSERT_FALSE(forwarder->subscribe(*request, *itCapability++));
+}
+
+TEST_F(SubscriberForwarderTest, canNotSubscribeOnEventCreationFailure) {
+    // Fail the event creation and return null event.
+    ON_CALL(*mAfbApi, createEvent(::testing::_)).WillByDefault(::testing::Return(nullptr));
+    EXPECT_CALL(*mAfbApi, createEvent(::testing::_)).Times(4);
+
+    std::list<std::string> upstreamEvents({"up-ev1", "up-ev2"});
+    std::list<std::string> downstreamEvents({"down-ev1", "down-ev2"});
+
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    ON_CALL(*capability, getUpstreamMessages()).WillByDefault(::testing::Return(upstreamEvents));
+    ON_CALL(*capability, getDownstreamMessages()).WillByDefault(::testing::Return(downstreamEvents));
+
+    auto forwarder = createSubscriberForwarder(capability);
+    ASSERT_NE(forwarder, nullptr);
+
+    auto itCapability = downstreamEvents.begin();
+    auto request = std::make_shared<::testing::StrictMock<AFBRequestMock>>();
+    std::string payload = "The answer to life the universe and everything = 42";
+    ASSERT_FALSE(forwarder->subscribe(*request, *itCapability++));
+    ASSERT_FALSE(forwarder->subscribe(*request, *itCapability++));
+    itCapability = upstreamEvents.begin();
+    ASSERT_FALSE(forwarder->subscribe(*request, *itCapability++));
+    ASSERT_FALSE(forwarder->subscribe(*request, *itCapability++));
+}
+
+TEST_F(SubscriberForwarderTest, canSubscribeToEvents) {
+    std::shared_ptr<AFBEventMock> mockEvent(new ::testing::StrictMock<AFBEventMock>());
+    ON_CALL(*mockEvent, subscribe(::testing::_)).WillByDefault(::testing::Return(true));
+    EXPECT_CALL(*mockEvent, subscribe(::testing::_)).Times(4);
+    auto eventCreator = [mockEvent](const std::string& eventName) -> std::shared_ptr<IAFBApi::IAFBEvent> {
+        return mockEvent;
+    };
+
+    ON_CALL(*mAfbApi, createEvent(::testing::_)).WillByDefault(::testing::Invoke(eventCreator));
+    EXPECT_CALL(*mAfbApi, createEvent(::testing::_)).Times(4);
+
+    std::list<std::string> upstreamEvents({"up-ev1", "up-ev2"});
+    std::list<std::string> downstreamEvents({"down-ev1", "down-ev2"});
+
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    ON_CALL(*capability, getUpstreamMessages()).WillByDefault(::testing::Return(upstreamEvents));
+    ON_CALL(*capability, getDownstreamMessages()).WillByDefault(::testing::Return(downstreamEvents));
+
+    auto forwarder = createSubscriberForwarder(capability);
+    ASSERT_NE(forwarder, nullptr);
+
+    auto itCapability = downstreamEvents.begin();
+    auto request = std::make_shared<::testing::StrictMock<AFBRequestMock>>();
+    ASSERT_TRUE(forwarder->subscribe(*request, *itCapability++));
+    ASSERT_TRUE(forwarder->subscribe(*request, *itCapability));
+    itCapability = upstreamEvents.begin();
+    ASSERT_TRUE(forwarder->subscribe(*request, *itCapability++));
+    ASSERT_TRUE(forwarder->subscribe(*request, *itCapability));
+}
+
+TEST_F(SubscriberForwarderTest, canNotPublishNonExistentEvents) {
+    std::shared_ptr<AFBEventMock> mockEvent(new ::testing::StrictMock<AFBEventMock>());
+    EXPECT_CALL(*mockEvent, publishEvent(::testing::_)).Times(0);
+    auto eventCreator = [mockEvent](const std::string& eventName) -> std::shared_ptr<IAFBApi::IAFBEvent> {
+        return mockEvent;
+    };
+
+    ON_CALL(*mAfbApi, createEvent(::testing::_)).WillByDefault(::testing::Invoke(eventCreator));
+    EXPECT_CALL(*mAfbApi, createEvent(::testing::_)).Times(4);
+
+    std::list<std::string> upstreamEvents({"up-ev1", "up-ev2"});
+    std::list<std::string> downstreamEvents({"down-ev1", "down-ev2"});
+
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    ON_CALL(*capability, getUpstreamMessages()).WillByDefault(::testing::Return(upstreamEvents));
+    ON_CALL(*capability, getDownstreamMessages()).WillByDefault(::testing::Return(downstreamEvents));
+
+    auto forwarder = createSubscriberForwarder(capability);
+    ASSERT_NE(forwarder, nullptr);
+
+    auto nonExistentEvents = std::list<std::string>({"non", "existent", "events"});
+    auto itCapability = nonExistentEvents.begin();
+    ASSERT_FALSE(forwarder->forwardMessage(*itCapability++, "My-Payload"));
+    ASSERT_FALSE(forwarder->forwardMessage(*itCapability++, "My-Payload"));
+    ASSERT_FALSE(forwarder->forwardMessage(*itCapability++, "My-Payload"));
+}
+
+TEST_F(SubscriberForwarderTest, canNotPublishOnEventCreationFailure) {
+    // Fail the event creation and return null event.
+    ON_CALL(*mAfbApi, createEvent(::testing::_)).WillByDefault(::testing::Return(nullptr));
+    EXPECT_CALL(*mAfbApi, createEvent(::testing::_)).Times(4);
+
+    std::list<std::string> upstreamEvents({"up-ev1", "up-ev2"});
+    std::list<std::string> downstreamEvents({"down-ev1", "down-ev2"});
+
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    ON_CALL(*capability, getUpstreamMessages()).WillByDefault(::testing::Return(upstreamEvents));
+    ON_CALL(*capability, getDownstreamMessages()).WillByDefault(::testing::Return(downstreamEvents));
+
+    auto forwarder = createSubscriberForwarder(capability);
+    ASSERT_NE(forwarder, nullptr);
+
+    auto itCapability = downstreamEvents.begin();
+    std::string payload = "The answer to life the universe and everything = 42";
+    ASSERT_FALSE(forwarder->forwardMessage(*itCapability++, payload));
+    ASSERT_FALSE(forwarder->forwardMessage(*itCapability++, payload));
+    itCapability = upstreamEvents.begin();
+    ASSERT_FALSE(forwarder->forwardMessage(*itCapability++, payload));
+    ASSERT_FALSE(forwarder->forwardMessage(*itCapability++, payload));
+}
+
+TEST_F(SubscriberForwarderTest, canPublishEvents) {
+    std::shared_ptr<AFBEventMock> mockEvent(new ::testing::StrictMock<AFBEventMock>());
+    ON_CALL(*mockEvent, publishEvent(::testing::_)).WillByDefault(::testing::Return(true));
+    EXPECT_CALL(*mockEvent, publishEvent(::testing::_)).Times(4);
+    auto eventCreator = [mockEvent](const std::string& eventName) -> std::shared_ptr<IAFBApi::IAFBEvent> {
+        return mockEvent;
+    };
+
+    ON_CALL(*mAfbApi, createEvent(::testing::_)).WillByDefault(::testing::Invoke(eventCreator));
+    EXPECT_CALL(*mAfbApi, createEvent(::testing::_)).Times(4);
+
+    std::list<std::string> upstreamEvents({"up-ev1", "up-ev2"});
+    std::list<std::string> downstreamEvents({"down-ev1", "down-ev2"});
+
+    auto capability = std::make_shared<::testing::StrictMock<CapabilityMock>>();
+    ON_CALL(*capability, getUpstreamMessages()).WillByDefault(::testing::Return(upstreamEvents));
+    ON_CALL(*capability, getDownstreamMessages()).WillByDefault(::testing::Return(downstreamEvents));
+
+    auto forwarder = createSubscriberForwarder(capability);
+    ASSERT_NE(forwarder, nullptr);
+
+    auto itCapability = downstreamEvents.begin();
+    std::string payload = "The answer to life the universe and everything = 42";
+    ASSERT_TRUE(forwarder->forwardMessage(*itCapability++, payload));
+    ASSERT_TRUE(forwarder->forwardMessage(*itCapability++, payload));
+    itCapability = upstreamEvents.begin();
+    ASSERT_TRUE(forwarder->forwardMessage(*itCapability++, payload));
+    ASSERT_TRUE(forwarder->forwardMessage(*itCapability++, payload));
+}
+
+}  // namespace test
+}  // namespace vshl
\ No newline at end of file
diff --git a/src/plugins/cmake/gtest.cmake b/src/plugins/cmake/gtest.cmake
new file mode 100644
index 0000000..def6559
--- /dev/null
+++ b/src/plugins/cmake/gtest.cmake
@@ -0,0 +1,44 @@
+# gtest
+
+find_package(Threads REQUIRED)
+
+# Enable ExternalProject CMake module
+INCLUDE(ExternalProject)
+
+ExternalProject_Add(
+    gtest
+    URL https://github.com/google/googletest/archive/release-1.8.1.zip
+    SOURCE_DIR "${CMAKE_BINARY_DIR}/gtest-src"
+    BINARY_DIR "${CMAKE_BINARY_DIR}/gtest-build"
+    INSTALL_COMMAND ""
+    LOG_DOWNLOAD ON
+    LOG_CONFIGURE ON
+    LOG_BUILD ON
+)
+
+# Get GTest source and binary directories from CMake project
+ExternalProject_Get_Property(gtest source_dir binary_dir)
+
+# Create a libgtest target to be used as a dependency by test programs
+ADD_LIBRARY(libgtest INTERFACE)
+TARGET_INCLUDE_DIRECTORIES(libgtest
+    INTERFACE
+        ${source_dir}/googletest/include
+)
+TARGET_LINK_LIBRARIES(libgtest
+    INTERFACE
+        ${binary_dir}/googlemock/gtest/libgtest.a
+        ${CMAKE_THREAD_LIBS_INIT}
+)
+
+# Create a libgmock target to be used as a dependency by test programs
+ADD_LIBRARY(libgmock INTERFACE)
+TARGET_INCLUDE_DIRECTORIES(libgmock
+    INTERFACE
+        ${source_dir}/googlemock/include
+)
+TARGET_LINK_LIBRARIES(libgmock
+    INTERFACE
+        ${binary_dir}/googlemock/libgmock.a
+        ${CMAKE_THREAD_LIBS_INIT}
+)
\ No newline at end of file
diff --git a/src/plugins/core/VRRequestProcessor.h b/src/plugins/core/VRRequestProcessor.h
new file mode 100644
index 0000000..c349a19
--- /dev/null
+++ b/src/plugins/core/VRRequestProcessor.h
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CORE_INCLUDE_VR_REQUESTPROCESSOR_H_
+#define VSHL_CORE_INCLUDE_VR_REQUESTPROCESSOR_H_
+
+#include <memory>
+#include <unordered_map>
+
+#include "core/include/VRRequest.h"
+#include "core/include/VRRequestProcessorDelegate.h"
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/logging/ILogger.h"
+#include "interfaces/voiceagents/IVoiceAgentsChangeObserver.h"
+
+using namespace std;
+
+namespace vshl {
+namespace core {
+/*
+ * This class is the entry point for all the voice recognition request
+ * creation and arbitration.
+ */
+class VRRequestProcessor {
+public:
+    // Create a VRRequestProcessor.
+    static unique_ptr<VRRequestProcessor> create(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::core::VRRequestProcessorDelegate> delegate);
+
+    // Triggers a voiceagent to start listening to user speech input.
+    // Returns the request ID. If start fails, then empty request ID
+    // is returned.
+    string startListening();
+
+    // Cancels all the active requests
+    void cancel();
+
+    // Returns the voiceagents observer that belongs to the core module.
+    shared_ptr<vshl::common::interfaces::IVoiceAgentsChangeObserver> getVoiceAgentsChangeObserver() const;
+
+    // Destructor
+    ~VRRequestProcessor();
+
+private:
+    // Constructor
+    VRRequestProcessor(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::core::VRRequestProcessorDelegate> delegate);
+
+    // Voiceagents observer
+    shared_ptr<vshl::common::interfaces::IVoiceAgentsChangeObserver> mVoiceAgentsChangeObserver;
+
+    // Request Processor Delegate
+    shared_ptr<vshl::core::VRRequestProcessorDelegate> mDelegate;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace core
+}  // namespace vshl
+
+#endif  // VSHL_CORE_INCLUDE_VR_REQUESTPROCESSOR_H_
diff --git a/src/plugins/core/VRRequestProcessorImpl.cpp b/src/plugins/core/VRRequestProcessorImpl.cpp
new file mode 100644
index 0000000..7441a7d
--- /dev/null
+++ b/src/plugins/core/VRRequestProcessorImpl.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "core/VRRequestProcessor.h"
+
+#include "core/include/VRAgentsObserver.h"
+
+static string TAG = "vshl::core::VRRequestProcessor";
+
+using Level = vshl::utilities::logging::Logger::Level;
+
+namespace vshl {
+namespace core {
+// Create a VRRequestProcessor.
+unique_ptr<VRRequestProcessor> VRRequestProcessor::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::core::VRRequestProcessorDelegate> delegate) {
+    auto processor = std::unique_ptr<VRRequestProcessor>(new VRRequestProcessor(logger, delegate));
+    return processor;
+}
+
+VRRequestProcessor::VRRequestProcessor(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::core::VRRequestProcessorDelegate> delegate) :
+        mLogger(logger),
+        mDelegate(delegate) {
+    mVoiceAgentsChangeObserver = VRAgentsObserver::create(mDelegate);
+}
+
+VRRequestProcessor::~VRRequestProcessor() {
+    mDelegate->cancelAllRequests();
+}
+
+string VRRequestProcessor::startListening() {
+    // Currently start is simply going to send the request to
+    // the default voice agent as the wake word detection is not
+    // enabled.
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> defaultVA = mDelegate->getDefaultVoiceAgent();
+    if (!defaultVA) {
+        mLogger->log(Level::ERROR, TAG, "Failed to start. No default voiceagent found.");
+        return "";
+    }
+
+    // If the requests container is not empty, then clear the
+    // existing requests in flight and create a new request.
+    mDelegate->cancelAllRequests();
+    return mDelegate->startRequestForVoiceAgent(defaultVA);
+}
+
+void VRRequestProcessor::cancel() {
+    // Cancel all pending requests
+    mDelegate->cancelAllRequests();
+}
+
+shared_ptr<vshl::common::interfaces::IVoiceAgentsChangeObserver> VRRequestProcessor::getVoiceAgentsChangeObserver()
+    const {
+    return mVoiceAgentsChangeObserver;
+}
+
+}  // namespace core
+}  // namespace vshl
diff --git a/src/plugins/core/include/VRAgentsObserver.h b/src/plugins/core/include/VRAgentsObserver.h
new file mode 100644
index 0000000..d4c0c7b
--- /dev/null
+++ b/src/plugins/core/include/VRAgentsObserver.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CORE_INCLUDE_VR_AGENTS_OBSERVER_H_
+#define VSHL_CORE_INCLUDE_VR_AGENTS_OBSERVER_H_
+
+#include <memory>
+
+#include "core/include/VRRequestProcessorDelegate.h"
+#include "interfaces/voiceagents/IVoiceAgentsChangeObserver.h"
+#include "utilities/logging/Logger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace core {
+/*
+ * This class will observe the changes to the voiceagents data and transfers
+ * the actual handling responsibility to its delegate.
+ */
+class VRAgentsObserver
+    : public vshl::common::interfaces::IVoiceAgentsChangeObserver {
+public:
+  // Create a VRAgentsObserver.
+  static shared_ptr<VRAgentsObserver>
+  create(weak_ptr<VRRequestProcessorDelegate> delegate);
+
+  ~VRAgentsObserver();
+
+protected:
+  void OnDefaultVoiceAgentChanged(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> defaultVoiceAgent)
+      override;
+  void OnVoiceAgentAdded(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+  void OnVoiceAgentRemoved(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+  void OnVoiceAgentActiveWakeWordChanged(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+  void OnVoiceAgentActivated(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+  void OnVoiceAgentDeactivated(
+      shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) override;
+
+private:
+  // Constructor
+  VRAgentsObserver(weak_ptr<VRRequestProcessorDelegate> delegate);
+
+  // Delegate that needs to be informed of the voiceagent data changes.
+  weak_ptr<VRRequestProcessorDelegate> mWeakDelegate;
+};
+
+} // namespace core
+} // namespace vshl
+
+#endif // VSHL_CORE_INCLUDE_VR_AGENTS_OBSERVER_H_
diff --git a/src/plugins/core/include/VRRequest.h b/src/plugins/core/include/VRRequest.h
new file mode 100644
index 0000000..522ec78
--- /dev/null
+++ b/src/plugins/core/include/VRRequest.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CORE_INCLUDE_VR_REQUEST_H_
+#define VSHL_CORE_INCLUDE_VR_REQUEST_H_
+
+#include <memory>
+
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/logging/ILogger.h"
+#include "interfaces/voiceagents/IVoiceAgent.h"
+
+using namespace std;
+
+namespace vshl {
+namespace core {
+/*
+ * This class implements the notion of a Voice Recognition Request.
+ * Each VR Request is currently mapped to one voice agent.
+ */
+class VRRequest {
+public:
+    // API Verbs
+    static std::string VA_VERB_STARTLISTENING;
+    static std::string VA_VERB_CANCEL;
+
+    // Create a VRRequest.
+    static unique_ptr<VRRequest> create(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+        string requestId,
+        shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent);
+
+    // Destructor
+    ~VRRequest();
+
+    // Invokes the underlying voiceagent's startlistening API.
+    // Returns true if started successfully. False otherwise.
+    bool startListening();
+
+    // Cancels the voice recognition in the unlerlying voiceagent.
+    // Returns true if canceled successfully. False otherwise.
+    bool cancel();
+
+private:
+    // Constructor
+    VRRequest(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+        const string requestId,
+        shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent);
+
+    // Binding API reference.
+    shared_ptr<vshl::common::interfaces::IAFBApi> mApi;
+
+    // Voice agent associated with this request
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> mVoiceAgent;
+
+    // Request ID
+    string mRequestId;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace core
+}  // namespace vshl
+
+#endif  // VSHL_CORE_INCLUDE_VR_REQUEST_H_
diff --git a/src/plugins/core/include/VRRequestProcessorDelegate.h b/src/plugins/core/include/VRRequestProcessorDelegate.h
new file mode 100644
index 0000000..94b7304
--- /dev/null
+++ b/src/plugins/core/include/VRRequestProcessorDelegate.h
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_CORE_INCLUDE_VR_REQUESTPROCESSORDELEGATE_H_
+#define VSHL_CORE_INCLUDE_VR_REQUESTPROCESSORDELEGATE_H_
+
+#include <memory>
+#include <unordered_map>
+
+#include "core/include/VRRequest.h"
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/logging/ILogger.h"
+#include "interfaces/voiceagents/IVoiceAgent.h"
+#include "utilities/uuid/UUIDGeneration.h"
+
+using namespace std;
+
+namespace vshl {
+namespace core {
+/*
+ * This is a delegate for VRRequestProcessor actions.
+ * The lifetime and dependencies of this object is managed
+ * by VRRequestProcessor. It plays the role of a Delegate in
+ * Delegate pattern and a one shop stop for most of the core
+ * module's state.
+ */
+class VRRequestProcessorDelegate {
+public:
+    // create method
+    static shared_ptr<VRRequestProcessorDelegate> create(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    // Destructor
+    ~VRRequestProcessorDelegate();
+
+    // Set default voiceagent
+    void setDefaultVoiceAgent(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent);
+
+    // Get the default voiceagent
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> getDefaultVoiceAgent() const;
+
+    // Add new request to the list and start processing it.
+    // New request is created and startListening on the
+    // voiceagent is called.
+    string startRequestForVoiceAgent(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent);
+
+    // Cancel all requests
+    void cancelAllRequests();
+
+    // Get All outstanding requests
+    // Used only by Test
+    unordered_map<string, shared_ptr<VRRequest>> getAllRequests();
+
+private:
+    // Constructor
+    VRRequestProcessorDelegate(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    // Binding API reference
+    shared_ptr<vshl::common::interfaces::IAFBApi> mApi;
+
+    // Default voiceagent
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> mDefaultVoiceAgent;
+
+    // A map of voiceagent IDs and their respective VR Request objects.
+    unordered_map<string, shared_ptr<VRRequest>> mVRRequests;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace core
+}  // namespace vshl
+
+#endif  // VSHL_CORE_INCLUDE_VR_REQUESTPROCESSORDELEGATE_H_
diff --git a/src/plugins/core/src/VRAgentsObserverImpl.cpp b/src/plugins/core/src/VRAgentsObserverImpl.cpp
new file mode 100644
index 0000000..7ee4a7e
--- /dev/null
+++ b/src/plugins/core/src/VRAgentsObserverImpl.cpp
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "core/include/VRAgentsObserver.h"
+
+namespace vshl {
+namespace core {
+
+shared_ptr<VRAgentsObserver> VRAgentsObserver::create(weak_ptr<VRRequestProcessorDelegate> delegate) {
+    auto observer = std::shared_ptr<VRAgentsObserver>(new VRAgentsObserver(delegate));
+    return observer;
+}
+
+VRAgentsObserver::VRAgentsObserver(weak_ptr<VRRequestProcessorDelegate> delegate) {
+    mWeakDelegate = delegate;
+}
+
+VRAgentsObserver::~VRAgentsObserver() {
+}
+
+void VRAgentsObserver::OnDefaultVoiceAgentChanged(shared_ptr<vshl::common::interfaces::IVoiceAgent> defaultVoiceAgent) {
+    if (auto delegate = mWeakDelegate.lock()) {
+        delegate->setDefaultVoiceAgent(defaultVoiceAgent);
+    }
+}
+
+void VRAgentsObserver::OnVoiceAgentAdded(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) {
+}
+
+void VRAgentsObserver::OnVoiceAgentRemoved(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) {
+}
+
+void VRAgentsObserver::OnVoiceAgentActiveWakeWordChanged(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) {
+    // Not Implemented
+}
+
+void VRAgentsObserver::OnVoiceAgentActivated(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) {
+}
+
+void VRAgentsObserver::OnVoiceAgentDeactivated(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) {
+}
+}  // namespace core
+}  // namespace vshl
diff --git a/src/plugins/core/src/VRRequestImpl.cpp b/src/plugins/core/src/VRRequestImpl.cpp
new file mode 100644
index 0000000..00adf96
--- /dev/null
+++ b/src/plugins/core/src/VRRequestImpl.cpp
@@ -0,0 +1,92 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "core/include/VRRequest.h"
+
+#define FREEIF(x) \
+    if (!x) {     \
+        free(x);  \
+    }
+#define BREAKIF(x)      \
+    if (x) {            \
+        result = false; \
+        break;          \
+    }
+
+static string TAG = "vshl::core::VRRequest";
+
+using Level = vshl::common::interfaces::ILogger::Level;
+
+namespace vshl {
+namespace core {
+
+string VRRequest::VA_VERB_STARTLISTENING = "startListening";
+string VRRequest::VA_VERB_CANCEL = "cancel";
+
+unique_ptr<VRRequest> VRRequest::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+    const string requestId,
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) {
+    if (logger == nullptr) {
+        return nullptr;
+    }
+
+    if (afbApi == nullptr) {
+        logger->log(Level::ERROR, TAG, "Invalid AFB API");
+        return nullptr;
+    }
+
+    auto request = std::unique_ptr<VRRequest>(new VRRequest(logger, afbApi, requestId, voiceAgent));
+    return request;
+}
+
+VRRequest::VRRequest(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi,
+    string requestId,
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) :
+        mApi(afbApi),
+        mRequestId(requestId),
+        mVoiceAgent(voiceAgent),
+        mLogger(logger) {
+}
+
+VRRequest::~VRRequest() {
+}
+
+bool VRRequest::startListening() {
+    json_object* object = NULL;
+    std::string error, info;
+    bool result = true;
+    int rc = mApi->callSync(mVoiceAgent->getApi(), VA_VERB_STARTLISTENING, NULL, &object, error, info);
+
+    FREEIF(object);
+
+    return true;
+}
+
+bool VRRequest::cancel() {
+    json_object* object = NULL;
+    std::string error, info;
+    bool result = true;
+    int rc = mApi->callSync(mVoiceAgent->getApi(), VA_VERB_CANCEL, NULL, &object, error, info);
+
+    FREEIF(object);
+
+    return true;
+}
+
+}  // namespace core
+}  // namespace vshl
diff --git a/src/plugins/core/src/VRRequestProcessorDelegateImpl.cpp b/src/plugins/core/src/VRRequestProcessorDelegateImpl.cpp
new file mode 100644
index 0000000..e20b22e
--- /dev/null
+++ b/src/plugins/core/src/VRRequestProcessorDelegateImpl.cpp
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "core/include/VRRequestProcessorDelegate.h"
+
+static string TAG = "vshl::core::VRRequestProcessorDelegate";
+
+using Level = vshl::common::interfaces::ILogger::Level;
+
+namespace vshl {
+namespace core {
+shared_ptr<VRRequestProcessorDelegate> VRRequestProcessorDelegate::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) {
+    auto delegate = std::shared_ptr<VRRequestProcessorDelegate>(new VRRequestProcessorDelegate(logger, afbApi));
+    return delegate;
+}
+
+VRRequestProcessorDelegate::VRRequestProcessorDelegate(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) :
+        mApi(afbApi),
+        mLogger(logger) {
+}
+
+VRRequestProcessorDelegate::~VRRequestProcessorDelegate() {
+    mVRRequests.clear();
+}
+
+string VRRequestProcessorDelegate::startRequestForVoiceAgent(
+    shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) {
+    if (!mApi) {
+        mLogger->log(Level::ERROR, TAG, "Failed to startRequestForVoiceAgent: " + voiceAgent->getId() + ", No API.");
+        return "";
+    }
+
+    // Generate a new request ID.
+    string newReqId = vshl::utilities::uuid::generateUUID();
+
+    // Create a new request and start listening.
+    shared_ptr<VRRequest> newRequest = VRRequest::create(mLogger, mApi, newReqId, voiceAgent);
+
+    // mLogger->log(Level::DEBUG, TAG, "Starting request with ID: " + newReqId);
+    if (!newRequest->startListening()) {
+        mLogger->log(Level::ERROR, TAG, "Failed to start listening.");
+        return "";
+    }
+
+    // Insert only if its started successfully.
+    mVRRequests.insert(make_pair(voiceAgent->getId(), newRequest));
+
+    return newReqId;
+}
+
+void VRRequestProcessorDelegate::cancelAllRequests() {
+    // Cancel Pending requests
+    if (!mVRRequests.empty()) {
+        auto vrRequestsIt = mVRRequests.begin();
+        while (vrRequestsIt != mVRRequests.end()) {
+            if (!vrRequestsIt->second->cancel()) {
+                mLogger->log(Level::WARNING, TAG, "Failed to cancel request: " + vrRequestsIt->first);
+            }
+            vrRequestsIt++;
+        }
+        mVRRequests.clear();
+    }
+}
+
+unordered_map<string, shared_ptr<VRRequest>> VRRequestProcessorDelegate::getAllRequests() {
+    return mVRRequests;
+}
+
+void VRRequestProcessorDelegate::setDefaultVoiceAgent(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent) {
+    mDefaultVoiceAgent = voiceAgent;
+}
+
+shared_ptr<vshl::common::interfaces::IVoiceAgent> VRRequestProcessorDelegate::getDefaultVoiceAgent() const {
+    return mDefaultVoiceAgent;
+}
+
+}  // namespace core
+}  // namespace vshl
diff --git a/src/plugins/core/test/VRRequestProcessorTest.cpp b/src/plugins/core/test/VRRequestProcessorTest.cpp
new file mode 100644
index 0000000..c1a37df
--- /dev/null
+++ b/src/plugins/core/test/VRRequestProcessorTest.cpp
@@ -0,0 +1,213 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include "core/VRRequestProcessor.h"
+#include "voiceagents/include/VoiceAgent.h"
+#include "voiceagents/test/VoiceAgentsTestData.h"
+
+#include "test/common/ConsoleLogger.h"
+#include "test/mocks/AFBApiMock.h"
+
+using namespace vshl::core;
+using namespace vshl::voiceagents;
+using namespace vshl::test::common;
+
+namespace vshl {
+namespace test {
+
+class VRRequestProcessorTest : public ::testing::Test {
+protected:
+    void SetUp() override {
+        mConsoleLogger = std::make_shared<ConsoleLogger>();
+        mAfbApi = std::make_shared<::testing::StrictMock<AFBApiMock>>();
+
+        auto vaTestData = *(getVoiceAgentsTestData().begin());
+        mVoiceAgent = VoiceAgent::create(
+            mConsoleLogger,
+            vaTestData.id,
+            vaTestData.name,
+            vaTestData.description,
+            vaTestData.api,
+            vaTestData.vendor,
+            vaTestData.activeWakeword,
+            vaTestData.isActive,
+            vaTestData.wakewords);
+
+        mVRReqProcessorDelegate = VRRequestProcessorDelegate::create(mConsoleLogger, mAfbApi);
+        mVRRequestProcessor = VRRequestProcessor::create(mConsoleLogger, mVRReqProcessorDelegate);
+    }
+
+    std::shared_ptr<::testing::StrictMock<AFBApiMock>> mAfbApi;
+    std::shared_ptr<ConsoleLogger> mConsoleLogger;
+    std::shared_ptr<VoiceAgent> mVoiceAgent;
+
+    std::shared_ptr<VRRequestProcessorDelegate> mVRReqProcessorDelegate;
+    std::shared_ptr<VRRequestProcessor> mVRRequestProcessor;
+};
+
+TEST_F(VRRequestProcessorTest, initializesCorrectly) {
+    ASSERT_NE(mVRRequestProcessor, nullptr);
+}
+
+TEST_F(VRRequestProcessorTest, startListeningFailsOnLackOfDefaultAgent) {
+    auto requestId = mVRRequestProcessor->startListening();
+    ASSERT_EQ(requestId, "");
+}
+
+TEST_F(VRRequestProcessorTest, startListeningAndCancelWorks) {
+    mVRReqProcessorDelegate->setDefaultVoiceAgent(mVoiceAgent);
+
+    {
+        ::testing::InSequence dummy;
+
+        EXPECT_CALL(
+            *mAfbApi,
+            callSync(
+                mVoiceAgent->getApi(),
+                VRRequest::VA_VERB_STARTLISTENING,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_))
+            .Times(1);
+
+        EXPECT_CALL(
+            *mAfbApi,
+            callSync(
+                mVoiceAgent->getApi(),
+                VRRequest::VA_VERB_CANCEL,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_))
+            .Times(1);
+    }
+
+    mVRRequestProcessor->startListening();
+    auto requests = mVRReqProcessorDelegate->getAllRequests();
+    ASSERT_EQ(requests.size(), 1);
+
+    mVRRequestProcessor->cancel();
+    requests = mVRReqProcessorDelegate->getAllRequests();
+    ASSERT_EQ(requests.size(), 0);
+}
+
+TEST_F(VRRequestProcessorTest, requestIsCancelledOnObjectDestruction) {
+    auto delegate = VRRequestProcessorDelegate::create(mConsoleLogger, mAfbApi);
+    auto processor = VRRequestProcessor::create(mConsoleLogger, delegate);
+
+    delegate->setDefaultVoiceAgent(mVoiceAgent);
+
+    {
+        ::testing::InSequence dummy;
+
+        EXPECT_CALL(
+            *mAfbApi,
+            callSync(
+                mVoiceAgent->getApi(),
+                VRRequest::VA_VERB_STARTLISTENING,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_))
+            .Times(1);
+
+        EXPECT_CALL(
+            *mAfbApi,
+            callSync(
+                mVoiceAgent->getApi(),
+                VRRequest::VA_VERB_CANCEL,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_))
+            .Times(1);
+    }
+
+    auto requestId = processor->startListening();
+    ASSERT_NE(requestId, "");
+
+    auto requests = delegate->getAllRequests();
+    ASSERT_EQ(requests.size(), 1);
+}
+
+TEST_F(VRRequestProcessorTest, backToBackStartListeningCancelsEarlierRequest) {
+    mVRReqProcessorDelegate->setDefaultVoiceAgent(mVoiceAgent);
+
+    {
+        ::testing::InSequence dummy;
+
+        EXPECT_CALL(
+            *mAfbApi,
+            callSync(
+                mVoiceAgent->getApi(),
+                VRRequest::VA_VERB_STARTLISTENING,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_))
+            .Times(1);
+
+        EXPECT_CALL(
+            *mAfbApi,
+            callSync(
+                mVoiceAgent->getApi(),
+                VRRequest::VA_VERB_CANCEL,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_))
+            .Times(1);
+
+        EXPECT_CALL(
+            *mAfbApi,
+            callSync(
+                mVoiceAgent->getApi(),
+                VRRequest::VA_VERB_STARTLISTENING,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_))
+            .Times(1);
+
+        EXPECT_CALL(
+            *mAfbApi,
+            callSync(
+                mVoiceAgent->getApi(),
+                VRRequest::VA_VERB_CANCEL,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_,
+                ::testing::_))
+            .Times(1);
+    }
+
+    mVRRequestProcessor->startListening();
+    auto requests = mVRReqProcessorDelegate->getAllRequests();
+    ASSERT_EQ(requests.size(), 1);
+
+    mVRRequestProcessor->startListening();
+    requests = mVRReqProcessorDelegate->getAllRequests();
+    ASSERT_EQ(requests.size(), 1);
+
+    mVRRequestProcessor->cancel();
+    requests = mVRReqProcessorDelegate->getAllRequests();
+    ASSERT_EQ(requests.size(), 0);
+}
+
+}  // namespace test
+}  // namespace vshl
\ No newline at end of file
diff --git a/src/plugins/core/test/VRRequestTest.cpp b/src/plugins/core/test/VRRequestTest.cpp
new file mode 100644
index 0000000..b1cd0a6
--- /dev/null
+++ b/src/plugins/core/test/VRRequestTest.cpp
@@ -0,0 +1,101 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include "core/include/VRRequest.h"
+#include "voiceagents/include/VoiceAgent.h"
+#include "voiceagents/test/VoiceAgentsTestData.h"
+
+#include "test/common/ConsoleLogger.h"
+#include "test/mocks/AFBApiMock.h"
+
+using namespace vshl::core;
+using namespace vshl::voiceagents;
+using namespace vshl::test::common;
+
+namespace vshl {
+namespace test {
+
+class VRRequestTest : public ::testing::Test {
+protected:
+    void SetUp() override {
+        mRequestId = "Req-0001";
+
+        mConsoleLogger = std::make_shared<ConsoleLogger>();
+        mAfbApi = std::make_shared<::testing::StrictMock<AFBApiMock>>();
+
+        auto vaTestData = *(getVoiceAgentsTestData().begin());
+        mVoiceAgent = VoiceAgent::create(
+            mConsoleLogger,
+            vaTestData.id,
+            vaTestData.name,
+            vaTestData.description,
+            vaTestData.api,
+            vaTestData.vendor,
+            vaTestData.activeWakeword,
+            vaTestData.isActive,
+            vaTestData.wakewords);
+
+        mVRRequest = VRRequest::create(mConsoleLogger, mAfbApi, mRequestId, mVoiceAgent);
+    }
+
+    std::string mRequestId;
+    std::shared_ptr<::testing::StrictMock<AFBApiMock>> mAfbApi;
+    std::shared_ptr<ConsoleLogger> mConsoleLogger;
+    std::shared_ptr<VoiceAgent> mVoiceAgent;
+
+    std::shared_ptr<VRRequest> mVRRequest;
+};
+
+TEST_F(VRRequestTest, initializesCorrectly) {
+    ASSERT_NE(mVRRequest, nullptr);
+}
+
+TEST_F(VRRequestTest, failsCreationOnInvalidParams) {
+    auto vrRequest = VRRequest::create(mConsoleLogger, nullptr, mRequestId, mVoiceAgent);
+    ASSERT_EQ(vrRequest, nullptr);
+
+    vrRequest = VRRequest::create(nullptr, mAfbApi, mRequestId, mVoiceAgent);
+    ASSERT_EQ(vrRequest, nullptr);
+}
+
+TEST_F(VRRequestTest, startsListeningSuccessfully) {
+    EXPECT_CALL(
+        *mAfbApi,
+        callSync(
+            mVoiceAgent->getApi(),
+            VRRequest::VA_VERB_STARTLISTENING,
+            ::testing::_,
+            ::testing::_,
+            ::testing::_,
+            ::testing::_))
+        .Times(1);
+
+    ASSERT_TRUE(mVRRequest->startListening());
+}
+
+TEST_F(VRRequestTest, cancelsSuccessfully) {
+    EXPECT_CALL(
+        *mAfbApi,
+        callSync(
+            mVoiceAgent->getApi(), VRRequest::VA_VERB_CANCEL, ::testing::_, ::testing::_, ::testing::_, ::testing::_))
+        .Times(1);
+
+    ASSERT_TRUE(mVRRequest->cancel());
+}
+
+}  // namespace test
+}  // namespace vshl
\ No newline at end of file
diff --git a/src/plugins/interfaces/afb/IAFBApi.h b/src/plugins/interfaces/afb/IAFBApi.h
new file mode 100644
index 0000000..cd98006
--- /dev/null
+++ b/src/plugins/interfaces/afb/IAFBApi.h
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_COMMON_INTERFACES_AFBAPI_H_
+#define VSHL_COMMON_INTERFACES_AFBAPI_H_
+
+#include <memory>
+#include <string>
+
+#include <json-c/json_object.h>
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+/**
+ * Interface to represent AFB Request.
+ */
+class IAFBRequest {
+public:
+    /**
+     * Gets the native request object.
+     */
+    virtual void* getNativeRequest() = 0;
+};
+
+/**
+ * Interface to encapsulate all AFB (AGL Application Framework Binding)
+ * functions.
+ */
+class IAFBApi {
+public:
+    /**
+     * Interface to represent AFB Event
+     */
+    class IAFBEvent {
+    public:
+        /**
+         * Gets human readable name of the event.
+         */
+        virtual std::string getName() const = 0;
+
+        /**
+         * Returns true if event is valid. False otherwise.
+         */
+        virtual bool isValid() = 0;
+
+        /**
+         * Publish event to all observers.
+         *
+         * @return The number of observers that received the event.
+         */
+        virtual int publishEvent(struct json_object* payload) = 0;
+
+        /**
+         * Subscribe to the event
+         *
+         * @c request Party interested in the event.
+         */
+        virtual bool subscribe(IAFBRequest& request) = 0;
+
+        /**
+         * Unsubscribe to the event
+         *
+         * @c request Party no longer interested in the event.
+         */
+        virtual bool unsubscribe(IAFBRequest& request) = 0;
+    };
+
+    virtual std::shared_ptr<IAFBEvent> createEvent(const std::string& eventName) = 0;
+
+    virtual int callSync(
+        const std::string& api,
+        const std::string& verb,
+        struct json_object* request,
+        struct json_object** result,
+        std::string& error,
+        std::string& info) = 0;
+};
+
+}  // namespace interfaces
+}  // namespace common
+}  // namespace vshl
+
+#endif  // VSHL_COMMON_INTERFACES_AFBAPI_H_
diff --git a/src/plugins/interfaces/capabilities/ICapability.h b/src/plugins/interfaces/capabilities/ICapability.h
new file mode 100644
index 0000000..4b134b7
--- /dev/null
+++ b/src/plugins/interfaces/capabilities/ICapability.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#ifndef VSHL_COMMON_INTERFACES_ICAPABILITY_H_
+#define VSHL_COMMON_INTERFACES_ICAPABILITY_H_
+
+#include <list>
+#include <string>
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+/*
+ * This interface defines the structure for a specific voiceagent capability.
+ */
+class ICapability {
+public:
+  /*
+   * Returns the capability's name.
+   */
+  virtual string getName() const = 0;
+
+  /*
+   * Returns the list of upstream messages.
+   */
+  virtual list<string> getUpstreamMessages() const = 0;
+
+  /*
+   * Returns the list of downstream messages
+   */
+  virtual list<string> getDownstreamMessages() const = 0;
+
+  /**
+   * Virtual destructor to assure proper cleanup of derived types.
+   */
+  virtual ~ICapability() = default;
+};
+
+} // namespace interfaces
+} // namespace common
+} // namespace vshl
+
+#endif // VSHL_COMMON_INTERFACES_ICAPABILITY_H_
diff --git a/src/plugins/interfaces/utilities/events/IEventFilter.h b/src/plugins/interfaces/utilities/events/IEventFilter.h
new file mode 100644
index 0000000..33d8202
--- /dev/null
+++ b/src/plugins/interfaces/utilities/events/IEventFilter.h
@@ -0,0 +1,46 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_COMMON_INTERFACES_IEVENTFILTER_H_
+#define VSHL_COMMON_INTERFACES_IEVENTFILTER_H_
+
+#include <string>
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+/*
+ * This is an abstract class that is responsible for filtering the events
+ * that are delivered to the high level voice service from apps or voiceagents.
+ */
+class IEventFilter {
+public:
+    // Name of the event filter.
+    virtual string getName() = 0;
+
+    // Every event filter needs to implement this method and
+    // return true if consuming the event or false otherwise.
+    virtual bool onIncomingEvent(const string eventName, const string voiceAgentId, const string payload) = 0;
+
+    // Destructor
+    virtual ~IEventFilter() = default;
+};
+
+}  // namespace interfaces
+}  // namespace common
+}  // namespace vshl
+
+#endif  // VSHL_COMMON_INTERFACES_IEVENTFILTER_H_
diff --git a/src/plugins/interfaces/utilities/logging/ILogger.h b/src/plugins/interfaces/utilities/logging/ILogger.h
new file mode 100644
index 0000000..a2618bc
--- /dev/null
+++ b/src/plugins/interfaces/utilities/logging/ILogger.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_COMMON_INTERFACES_LOGGER_H_
+#define VSHL_COMMON_INTERFACES_LOGGER_H_
+
+#include <string>
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+class ILogger {
+public:
+  enum Level {
+    DEBUG,
+    INFO,
+    WARNING,
+    ERROR,
+    NOTICE,
+  };
+
+  virtual void log(Level level, const std::string &tag,
+                   const std::string &message) = 0;
+};
+
+} // namespace interfaces
+} // namespace common
+} // namespace vshl
+
+#endif // VSHL_COMMON_INTERFACES_LOGGER_H_
diff --git a/src/plugins/interfaces/voiceagents/IVoiceAgent.h b/src/plugins/interfaces/voiceagents/IVoiceAgent.h
new file mode 100644
index 0000000..367ad72
--- /dev/null
+++ b/src/plugins/interfaces/voiceagents/IVoiceAgent.h
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#ifndef VSHL_COMMON_INTERFACES_IVOICEAGENT_H_
+#define VSHL_COMMON_INTERFACES_IVOICEAGENT_H_
+
+#include <memory>
+#include <string>
+#include <unordered_set>
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+/*
+ * This interface define the structure for VoiceAgent Information.
+ * The implementation of this structure is owned by voiceagents module.
+ */
+class IVoiceAgent {
+public:
+  /*
+   * Set the active wakeword for this voiceagent
+   */
+  virtual bool setActiveWakeWord(const string &wakeword) = 0;
+
+  /*
+   * Sets the activation state of this voiceagent
+   */
+  virtual void setIsActive(bool active) = 0;
+
+  /*
+   * Returns the voiceagent's ID.
+   */
+  virtual string getId() const = 0;
+
+  /*
+   * Returns the voiceagent's name.
+   */
+  virtual string getName() const = 0;
+
+  /*
+   * Returns the voiceagent's description.
+   */
+  virtual string getDescription() const = 0;
+
+  /*
+   * Returns the voiceagent's API.
+   */
+  virtual string getApi() const = 0;
+
+  /*
+   * Returns the voiceagent's vendor information/
+   */
+  virtual string getVendor() const = 0;
+
+  /*
+   * Returns the list of wakewords mapped to the voiceagent.
+   */
+  virtual shared_ptr<unordered_set<string>> getWakeWords() const = 0;
+
+  /*
+   * Returns true if the voiceagent is active. False otherwise.
+   */
+  virtual bool isActive() const = 0;
+
+  /*
+   * Returns the active wakeword for the voiceagent.
+   */
+  virtual string getActiveWakeword() const = 0;
+
+  /**
+   * Virtual destructor to assure proper cleanup of derived types.
+   */
+  virtual ~IVoiceAgent() = default;
+};
+
+} // namespace interfaces
+} // namespace common
+} // namespace vshl
+
+#endif // VSHL_COMMON_INTERFACES_IVOICEAGENT_H_
diff --git a/src/plugins/interfaces/voiceagents/IVoiceAgentsChangeObserver.h b/src/plugins/interfaces/voiceagents/IVoiceAgentsChangeObserver.h
new file mode 100644
index 0000000..e552ab5
--- /dev/null
+++ b/src/plugins/interfaces/voiceagents/IVoiceAgentsChangeObserver.h
@@ -0,0 +1,80 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#ifndef VSHL_COMMON_INTERFACES_IVOICEAGENTSCHANGEOBSERVER_H_
+#define VSHL_COMMON_INTERFACES_IVOICEAGENTSCHANGEOBSERVER_H_
+
+#include <memory>
+#include <string>
+
+#include "interfaces/voiceagents/IVoiceAgent.h"
+
+using namespace std;
+
+namespace vshl {
+namespace common {
+namespace interfaces {
+
+/*
+ * This interface is used to observe changes to the voiceagents datastore.
+ * The voiceagents data store is contained in the voiceagents module.
+ */
+class IVoiceAgentsChangeObserver {
+public:
+  /**
+   * This method notifies the observers that the default voiceagent selection
+   * has been updated.
+   */
+  virtual void
+  OnDefaultVoiceAgentChanged(shared_ptr<IVoiceAgent> defaultVoiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that a new voiceagent has been added.
+   */
+  virtual void OnVoiceAgentAdded(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that a voiceagent is removed.
+   */
+  virtual void OnVoiceAgentRemoved(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that active wakeword for a voiceagent is
+   * updated.
+   */
+  virtual void
+  OnVoiceAgentActiveWakeWordChanged(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that the voiceagent has been activated.
+   */
+  virtual void OnVoiceAgentActivated(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * This method notifies the observers that the voiceagent has been activated.
+   */
+  virtual void OnVoiceAgentDeactivated(shared_ptr<IVoiceAgent> voiceAgent) = 0;
+
+  /**
+   * Virtual destructor to assure proper cleanup of derived types.
+   */
+  virtual ~IVoiceAgentsChangeObserver() = default;
+};
+
+} // namespace interfaces
+} // namespace common
+} // namespace vshl
+
+#endif // VSHL_COMMON_INTERFACES_IVOICEAGENTSCHANGEOBSERVER_H_
diff --git a/src/plugins/test/common/ConsoleLogger.cpp b/src/plugins/test/common/ConsoleLogger.cpp
new file mode 100644
index 0000000..d4f9eef
--- /dev/null
+++ b/src/plugins/test/common/ConsoleLogger.cpp
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <iostream>
+
+#include "test/common/ConsoleLogger.h"
+
+namespace vshl {
+namespace test {
+namespace common {
+
+void ConsoleLogger::log(Level level, const std::string& tag, const std::string& message) {
+    string format_msg = "Tag: " + tag + ", message: " + message;
+    std::cout << format_msg << std::endl;
+}
+
+}  // namespace common
+}  // namespace test
+}  // namespace vshl
diff --git a/src/plugins/test/common/ConsoleLogger.h b/src/plugins/test/common/ConsoleLogger.h
new file mode 100644
index 0000000..11bc0d8
--- /dev/null
+++ b/src/plugins/test/common/ConsoleLogger.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_TEST_COMMON_CONSOLE_LOGGER_H_
+#define VSHL_TEST_COMMON_CONSOLE_LOGGER_H_
+
+#include "interfaces/utilities/logging/ILogger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace test {
+namespace common {
+
+class ConsoleLogger : public vshl::common::interfaces::ILogger {
+public:
+  // ILogger interface
+  void log(Level level, const std::string &tag,
+           const std::string &message) override;
+};
+
+} // namespace common
+} // namespace test
+} // namespace vshl
+
+#endif // VSHL_TEST_COMMON_CONSOLE_LOGGER_H_
diff --git a/src/plugins/test/mocks/AFBApiMock.h b/src/plugins/test/mocks/AFBApiMock.h
new file mode 100644
index 0000000..46e2e99
--- /dev/null
+++ b/src/plugins/test/mocks/AFBApiMock.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_TEST_MOCKS_AFBAPIMOCK_H_
+#define VSHL_TEST_MOCKS_AFBAPIMOCK_H_
+
+#include <gmock/gmock.h>
+
+#include "interfaces/afb/IAFBApi.h"
+
+namespace vshl {
+namespace test {
+
+class AFBApiMock : public vshl::common::interfaces::IAFBApi {
+public:
+    MOCK_METHOD1(createEvent, std::shared_ptr<IAFBEvent>(const std::string& eventName));
+    MOCK_METHOD6(
+        callSync,
+        int(const std::string& api,
+            const std::string& verb,
+            struct json_object* request,
+            struct json_object** result,
+            std::string& error,
+            std::string& info));
+};
+
+}  // namespace test
+}  // namespace vshl
+
+#endif  // VSHL_TEST_MOCKS_AFBAPIMOCK_H_
\ No newline at end of file
diff --git a/src/plugins/test/mocks/AFBEventMock.h b/src/plugins/test/mocks/AFBEventMock.h
new file mode 100644
index 0000000..3d78e9f
--- /dev/null
+++ b/src/plugins/test/mocks/AFBEventMock.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_TEST_MOCKS_AFBEVENTMOCK_H_
+#define VSHL_TEST_MOCKS_AFBEVENTMOCK_H_
+
+#include <gmock/gmock.h>
+
+#include "interfaces/afb/IAFBApi.h"
+
+namespace vshl {
+namespace test {
+
+class AFBEventMock : public vshl::common::interfaces::IAFBApi::IAFBEvent {
+public:
+    void setName(const std::string& name) {
+        mName = name;
+    }
+
+    std::string getName() const override {
+        return mName;
+    }
+
+    MOCK_METHOD0(isValid, bool());
+    MOCK_METHOD1(publishEvent, int(struct json_object* payload));
+    MOCK_METHOD1(subscribe, bool(vshl::common::interfaces::IAFBRequest& request));
+    MOCK_METHOD1(unsubscribe, bool(vshl::common::interfaces::IAFBRequest& request));
+
+private:
+    std::string mName;
+};
+
+}  // namespace test
+}  // namespace vshl
+
+#endif  // VSHL_TEST_MOCKS_AFBEVENTMOCK_H_
\ No newline at end of file
diff --git a/src/plugins/test/mocks/AFBRequestMock.h b/src/plugins/test/mocks/AFBRequestMock.h
new file mode 100644
index 0000000..5557565
--- /dev/null
+++ b/src/plugins/test/mocks/AFBRequestMock.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_TEST_MOCKS_AFBREQUESTMOCK_H_
+#define VSHL_TEST_MOCKS_AFBREQUESTMOCK_H_
+
+#include <gmock/gmock.h>
+
+#include "interfaces/afb/IAFBApi.h"
+
+namespace vshl {
+namespace test {
+
+class AFBRequestMock : public vshl::common::interfaces::IAFBRequest {
+public:
+    MOCK_METHOD0(getNativeRequest, void*());
+};
+
+}  // namespace test
+}  // namespace vshl
+
+#endif  // VSHL_TEST_MOCKS_AFBREQUESTMOCK_H_
\ No newline at end of file
diff --git a/src/plugins/test/mocks/CapabilityMock.h b/src/plugins/test/mocks/CapabilityMock.h
new file mode 100644
index 0000000..a2201df
--- /dev/null
+++ b/src/plugins/test/mocks/CapabilityMock.h
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_TEST_MOCKS_CAPABILITYMOCK_H_
+#define VSHL_TEST_MOCKS_CAPABILITYMOCK_H_
+
+#include <gmock/gmock.h>
+
+#include "interfaces/capabilities/ICapability.h"
+
+namespace vshl {
+namespace test {
+
+class CapabilityMock : public vshl::common::interfaces::ICapability {
+public:
+    MOCK_CONST_METHOD0(getName, std::string());
+    MOCK_CONST_METHOD0(getUpstreamMessages, std::list<std::string>());
+    MOCK_CONST_METHOD0(getDownstreamMessages, std::list<std::string>());
+};
+
+}  // namespace test
+}  // namespace vshl
+
+#endif  // VSHL_TEST_MOCKS_CAPABILITYMOCK_H_
\ No newline at end of file
diff --git a/src/plugins/test/mocks/VoiceAgentsChangeObserverMock.h b/src/plugins/test/mocks/VoiceAgentsChangeObserverMock.h
new file mode 100644
index 0000000..6edeea2
--- /dev/null
+++ b/src/plugins/test/mocks/VoiceAgentsChangeObserverMock.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_TEST_MOCKS_VOICEAGENTSCHANGEOBSERVERMOCK_H_
+#define VSHL_TEST_MOCKS_VOICEAGENTSCHANGEOBSERVERMOCK_H_
+
+#include <gmock/gmock.h>
+
+#include "interfaces/voiceagents/IVoiceAgentsChangeObserver.h"
+
+namespace vshl {
+namespace test {
+
+class VoiceAgentsChangeObserverMock : public vshl::common::interfaces::IVoiceAgentsChangeObserver {
+public:
+    MOCK_METHOD1(OnDefaultVoiceAgentChanged, void(shared_ptr<vshl::common::interfaces::IVoiceAgent> defaultVoiceAgent));
+    MOCK_METHOD1(OnVoiceAgentAdded, void(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent));
+    MOCK_METHOD1(OnVoiceAgentRemoved, void(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent));
+    MOCK_METHOD1(OnVoiceAgentActiveWakeWordChanged, void(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent));
+    MOCK_METHOD1(OnVoiceAgentActivated, void(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent));
+    MOCK_METHOD1(OnVoiceAgentDeactivated, void(shared_ptr<vshl::common::interfaces::IVoiceAgent> voiceAgent));
+};
+
+}  // namespace test
+}  // namespace vshl
+
+#endif  // VSHL_TEST_MOCKS_VOICEAGENTSCHANGEOBSERVERMOCK_H_
\ No newline at end of file
diff --git a/src/plugins/utilities/events/EventRouter.cpp b/src/plugins/utilities/events/EventRouter.cpp
new file mode 100644
index 0000000..999c3dd
--- /dev/null
+++ b/src/plugins/utilities/events/EventRouter.cpp
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "utilities/events/EventRouter.h"
+
+static string TAG = "vshl::utilities::events::EventRouter";
+
+using Level = vshl::common::interfaces::ILogger::Level;
+
+namespace vshl {
+namespace utilities {
+namespace events {
+
+unique_ptr<EventRouter> EventRouter::create(shared_ptr<vshl::common::interfaces::ILogger> logger) {
+    return std::unique_ptr<EventRouter>(new EventRouter(logger));
+}
+
+EventRouter::EventRouter(shared_ptr<vshl::common::interfaces::ILogger> logger) : mLogger(logger) {
+}
+
+EventRouter::~EventRouter() {
+    mEventFilters.clear();
+}
+
+bool EventRouter::handleIncomingEvent(const string eventName, const string voiceAgentId, const string payload) {
+    for (auto eventFilter : mEventFilters) {
+        if (eventFilter->onIncomingEvent(eventName, voiceAgentId, payload)) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool EventRouter::addEventFilter(shared_ptr<vshl::common::interfaces::IEventFilter> filter) {
+    if (!filter) {
+        mLogger->log(Level::ERROR, TAG, "Failed to add event filter. Invalid arguments.");
+        return false;
+    }
+
+    mEventFilters.insert(filter);
+    return true;
+}
+
+bool EventRouter::removeEventFilter(shared_ptr<vshl::common::interfaces::IEventFilter> filter) {
+    if (!filter) {
+        mLogger->log(Level::ERROR, TAG, "Failed to add remove filter. Invalid arguments.");
+        return false;
+    }
+
+    mEventFilters.erase(filter);
+    return true;
+}
+
+}  // namespace events
+}  // namespace utilities
+}  // namespace vshl
diff --git a/src/plugins/utilities/events/EventRouter.h b/src/plugins/utilities/events/EventRouter.h
new file mode 100644
index 0000000..fd7f0c2
--- /dev/null
+++ b/src/plugins/utilities/events/EventRouter.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_UTILITIES_EVENTS_EVENTMANAGER_H_
+#define VSHL_UTILITIES_EVENTS_EVENTMANAGER_H_
+
+#include <memory>
+#include <string>
+#include <unordered_set>
+
+#include "interfaces/utilities/events/IEventFilter.h"
+#include "interfaces/utilities/logging/ILogger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace utilities {
+namespace events {
+/*
+ * This class is responsible for routing incoming events to
+ * the appropriate event listener for consumption.
+ * Note: The listeners should implement the IEventFilter class.
+ */
+class EventRouter {
+public:
+    static unique_ptr<EventRouter> create(shared_ptr<vshl::common::interfaces::ILogger> logger);
+
+    // Destructor
+    ~EventRouter();
+
+    // Add event filter as listerner.
+    bool addEventFilter(shared_ptr<vshl::common::interfaces::IEventFilter> filter);
+
+    // Remove event filter as listerner.
+    bool removeEventFilter(shared_ptr<vshl::common::interfaces::IEventFilter> filter);
+
+    // This method is called by the controller for routing
+    // the event to appropriate listener.
+    bool handleIncomingEvent(const string eventName, const string voiceAgentId, const string payload);
+
+private:
+    EventRouter(shared_ptr<vshl::common::interfaces::ILogger> logger);
+
+    // set of event filters.
+    unordered_set<shared_ptr<vshl::common::interfaces::IEventFilter>> mEventFilters;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace events
+}  // namespace utilities
+}  // namespace vshl
+
+#endif  // VSHL_UTILITIES_EVENTS_EVENTROUTER_H_
diff --git a/src/plugins/utilities/logging/Logger.cpp b/src/plugins/utilities/logging/Logger.cpp
new file mode 100644
index 0000000..6374e19
--- /dev/null
+++ b/src/plugins/utilities/logging/Logger.cpp
@@ -0,0 +1,56 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "utilities/logging/Logger.h"
+
+namespace vshl {
+namespace utilities {
+namespace logging {
+
+// Constructor
+Logger::Logger(AFB_ApiT api) {
+    mApi = api;
+}
+
+unique_ptr<Logger> Logger::create(AFB_ApiT api) {
+    auto logger = std::unique_ptr<Logger>(new Logger(api));
+    return logger;
+}
+
+void Logger::log(Level level, const std::string& tag, const std::string& message) {
+    string format_msg = "Tag: " + tag + ", message: " + message;
+    switch (level) {
+        case Level::NOTICE:
+            AFB_ApiNotice(mApi, format_msg.c_str());
+            break;
+        case Level::WARNING:
+            AFB_ApiWarning(mApi, format_msg.c_str());
+            break;
+        case Level::DEBUG:
+            AFB_ApiDebug(mApi, format_msg.c_str());
+            break;
+        case Level::ERROR:
+            AFB_ApiError(mApi, format_msg.c_str());
+            break;
+        case Level::INFO:
+            AFB_ApiInfo(mApi, format_msg.c_str());
+            break;
+        default:
+            break;
+    }
+}
+
+}  // namespace logging
+}  // namespace utilities
+}  // namespace vshl
diff --git a/src/plugins/utilities/logging/Logger.h b/src/plugins/utilities/logging/Logger.h
new file mode 100644
index 0000000..79c89a5
--- /dev/null
+++ b/src/plugins/utilities/logging/Logger.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_UTILITIES_LOGGING_LOGGER_H_
+#define VSHL_UTILITIES_LOGGING_LOGGER_H_
+
+#include <memory>
+
+extern "C" {
+#define AFB_BINDING_VERSION 3
+#include "afb-definitions.h"
+#include "ctl-plugin.h"
+};
+
+#include "interfaces/utilities/logging/ILogger.h"
+
+using namespace std;
+
+namespace vshl {
+namespace utilities {
+namespace logging {
+
+class Logger : public vshl::common::interfaces::ILogger {
+public:
+  static std::unique_ptr<Logger> create(AFB_ApiT api);
+
+  // ILogger interface
+  void log(Level level, const std::string &tag,
+           const std::string &message) override;
+
+private:
+  Logger(AFB_ApiT api);
+
+  // Binding API reference
+  AFB_ApiT mApi;
+};
+
+} // namespace logging
+} // namespace utilities
+} // namespace vshl
+
+#endif // VSHL_UTILITIES_LOGGING_LOGGER_H_
diff --git a/src/plugins/utilities/uuid/UUIDGeneration.cpp b/src/plugins/utilities/uuid/UUIDGeneration.cpp
new file mode 100644
index 0000000..bb03fc6
--- /dev/null
+++ b/src/plugins/utilities/uuid/UUIDGeneration.cpp
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+// This code is copied from https://github.com/alexa/avs-device-sdk/
+// Minor modifications are made to the original file.
+
+#include <random>
+#include <chrono>
+#include <sstream>
+#include <iomanip>
+#include <mutex>
+#include <climits>
+#include <algorithm>
+#include <functional>
+
+#include "utilities/uuid/UUIDGeneration.h"
+
+namespace vshl {
+namespace utilities {
+namespace uuid {
+
+/// String to identify log entries originating from this file.
+static const std::string TAG("UUIDGeneration");
+
+/// The UUID version (Version 4), shifted into the correct position in the byte.
+static const uint8_t UUID_VERSION_VALUE = 4 << 4;
+
+/// The UUID variant (Variant 1), shifted into the correct position in the byte.
+static const size_t UUID_VARIANT_VALUE = 2 << 6;
+
+/// Separator used between UUID fields.
+static const std::string SEPARATOR("-");
+
+/// Number of bits in the replacement value.
+static const size_t MAX_NUM_REPLACEMENT_BITS = CHAR_BIT;
+
+/// Number of bits in a hex digit.
+static const size_t BITS_IN_HEX_DIGIT = 4;
+
+/**
+ * Randomly generate a string of hex digits. Before the conversion of hex to string,
+ * the function allows replacement of the bits of the first two generated hex digits.
+ * Replacement happens starting at the most significant, to the least significant bit.
+ *
+ * @param ibe A random number generator.
+ * @param numDigits The number of hex digits [0-9],[a-f] to generate.
+ * @param replacementBits The replacement value for up to the first two digits generated.
+ * @param numReplacementBits The number of bits of @c replacementBits to use.
+ *
+ * @return A hex string of length @c numDigits.
+ */
+static const std::string generateHexWithReplacement(
+    std::independent_bits_engine<std::default_random_engine, CHAR_BIT, uint8_t>& ibe,
+    unsigned int numDigits,
+    uint8_t replacementBits,
+    unsigned short numReplacementBits) {
+    if (numReplacementBits > MAX_NUM_REPLACEMENT_BITS) {
+        return "";
+    }
+
+    if (numReplacementBits > (numDigits * BITS_IN_HEX_DIGIT)) {
+        return "";
+    }
+
+    // Makes assumption that 1 digit = 4 bits.
+    std::vector<uint8_t> bytes(ceil(numDigits / 2.0));
+    std::generate(bytes.begin(), bytes.end(), std::ref(ibe));
+
+    // Replace the specified number of bits from the first byte.
+    bytes.at(0) &= (0xff >> numReplacementBits);
+    replacementBits &= (0xff << (MAX_NUM_REPLACEMENT_BITS - numReplacementBits));
+    bytes.at(0) |= replacementBits;
+
+    std::ostringstream oss;
+    for (const auto& byte : bytes) {
+        oss << std::hex << std::setfill('0') << std::setw(2) << static_cast<int>(byte);
+    }
+
+    std::string bytesText = oss.str();
+    // Remove the last digit for odd numDigits case.
+    bytesText.resize(numDigits);
+
+    return bytesText;
+}
+
+/**
+ * Randomly generate a string of hex digits.
+ *
+ * @param ibe A random number generator.
+ * @param numDigits The number of hex digits [0-9],[a-f] to generate.
+ *
+ * @return A hex string of length @c numDigits.
+ */
+static const std::string generateHex(
+    std::independent_bits_engine<std::default_random_engine, CHAR_BIT, uint8_t>& ibe,
+    unsigned int numDigits) {
+    return generateHexWithReplacement(ibe, numDigits, 0, 0);
+}
+
+const std::string generateUUID() {
+    static bool seeded = false;
+    static std::independent_bits_engine<std::default_random_engine, CHAR_BIT, uint8_t> ibe;
+    static std::mutex mutex;
+    std::unique_lock<std::mutex> lock(mutex);
+    if (!seeded) {
+        std::random_device rd;
+        ibe.seed(
+            rd() +
+            std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::steady_clock::now().time_since_epoch())
+                .count());
+        seeded = true;
+    }
+
+    std::ostringstream uuidText;
+    uuidText << generateHex(ibe, 8) << SEPARATOR << generateHex(ibe, 4) << SEPARATOR
+             << generateHexWithReplacement(ibe, 4, UUID_VERSION_VALUE, 4) << SEPARATOR
+             << generateHexWithReplacement(ibe, 4, UUID_VARIANT_VALUE, 2) << SEPARATOR << generateHex(ibe, 12);
+
+    lock.unlock();
+
+    return uuidText.str();
+}
+
+}  // namespace uuid
+}  // namespace utilities
+}  // namespace vshl
diff --git a/src/plugins/utilities/uuid/UUIDGeneration.h b/src/plugins/utilities/uuid/UUIDGeneration.h
new file mode 100644
index 0000000..7af9cb1
--- /dev/null
+++ b/src/plugins/utilities/uuid/UUIDGeneration.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+// This code is copied from https://github.com/alexa/avs-device-sdk/
+// Minor modifications are made to the original file.
+
+#ifndef VSHL_UTILITIES_UUID_UUIDGENERATION_H_
+#define VSHL_UTILITIES_UUID_UUIDGENERATION_H_
+
+#include <string>
+
+namespace vshl {
+namespace utilities {
+namespace uuid {
+
+/**
+ * Generates a variant 1, version 4 universally unique identifier (UUID) consisting of 32 hexadecimal digits.
+ * The UUID generated is of the format xxxxxxxx-xxxx-Mxxx-Nxxx-xxxxxxxxxxxx where M indicates the version, and the two
+ * most significant bits of N indicates the variant. M is 0100 (binary) for version 4 and N is 10xx(binary) for
+ * variant 1.
+ * @see https://tools.ietf.org/html/rfc4122.
+ *
+ * @return A uuid as a string.
+ */
+const std::string generateUUID();
+
+}  // namespace uuid
+}  // namespace utilities
+}  // namespace vshl
+
+#endif  // VSHL_UTILITIES_UUID_UUIDGENERATION_H_
\ No newline at end of file
diff --git a/src/plugins/voiceagents/VoiceAgentEventNames.h b/src/plugins/voiceagents/VoiceAgentEventNames.h
new file mode 100644
index 0000000..4575528
--- /dev/null
+++ b/src/plugins/voiceagents/VoiceAgentEventNames.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTEVENTNAMES_H_
+#define VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTEVENTNAMES_H_
+
+#include <list>
+#include <string>
+
+using namespace std;
+
+namespace vshl {
+namespace voiceagents {
+
+static string VSHL_EVENT_AUTH_STATE_EVENT = "voice_authstate_event";
+static string VSHL_EVENT_CONNECTION_STATE_EVENT = "voice_connectionstate_event";
+static string VSHL_EVENT_DIALOG_STATE_EVENT = "voice_dialogstate_event";
+
+static list<string> VSHL_EVENTS = {
+    VSHL_EVENT_AUTH_STATE_EVENT, VSHL_EVENT_CONNECTION_STATE_EVENT,
+    VSHL_EVENT_DIALOG_STATE_EVENT,
+};
+
+} // namespace voiceagents
+} // namespace vshl
+
+#endif // VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTEVENTNAMES_H_
diff --git a/src/plugins/voiceagents/VoiceAgentsDataManager.h b/src/plugins/voiceagents/VoiceAgentsDataManager.h
new file mode 100644
index 0000000..a4c9143
--- /dev/null
+++ b/src/plugins/voiceagents/VoiceAgentsDataManager.h
@@ -0,0 +1,135 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTS_H_
+#define VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTS_H_
+
+#include <memory>
+#include <set>
+#include <unordered_map>
+#include <unordered_set>
+
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/events/IEventFilter.h"
+#include "interfaces/utilities/logging/ILogger.h"
+#include "interfaces/voiceagents/IVoiceAgent.h"
+#include "interfaces/voiceagents/IVoiceAgentsChangeObserver.h"
+#include "voiceagents/include/VoiceAgent.h"
+#include "voiceagents/include/VoiceAgentEventsHandler.h"
+
+namespace vshl {
+namespace voiceagents {
+/*
+ * This class implements the data model for voiceagents.
+ * Supports add, remove and query operations on voiceagent data.
+ * Notifies the observers of the changes in the voiceagents data model.
+ */
+class VoiceAgentsDataManager {
+public:
+    // Create a VoiceAgentsDataManager.
+    static std::unique_ptr<VoiceAgentsDataManager> create(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    /**
+     * Activates the list of voiceagents.
+     *
+     * @return Number of activated agents
+     */
+    uint32_t activateVoiceAgents(const unordered_set<string>& activeVoiceAgentIds);
+
+    /**
+     * Deactivates the list of voiceagents.
+     *
+     * @return Number of de-activated agents
+     */
+    uint32_t deactivateVoiceAgents(const unordered_set<string>& inactiveVoiceAgentIds);
+
+    // Sets the default voiceagent.
+    bool setDefaultVoiceAgent(const string& voiceAgentId);
+
+    // Sets the default voiceagent.
+    std::string getDefaultVoiceAgent();
+
+    // Sets the active wakeword for the voiceagent.
+    bool setActiveWakeWord(const string& voiceAgentId, const string& wakeword);
+
+    // Adds a new voiceagent to the cache and also persists the information in a
+    // database.
+    // This call would notify all the observers about the new voiceagent addition.
+    bool addNewVoiceAgent(
+        const string& id,
+        const string& name,
+        const string& description,
+        const string& api,
+        const string& vendor,
+        const string& activeWakeword,
+        const bool isActive,
+        const shared_ptr<unordered_set<string>> wakewords);
+
+    // Removes the voiceagent from thecache and also from persistent database.
+    // This call would notify all the observers about the removal of the
+    // voiceagent.
+    bool removeVoiceAgent(const string& voiceAgentId);
+
+    // Returns the set of all voice agents in @c VoiceAgentsDataManger cache
+    std::set<std::shared_ptr<vshl::common::interfaces::IVoiceAgent>> getAllVoiceAgents();
+
+    // Returns the event filter that belongs to the core module.
+    shared_ptr<vshl::common::interfaces::IEventFilter> getEventFilter() const;
+
+    // Subscribe to an event coming from the voiceagent.
+    bool subscribeToVshlEventFromVoiceAgent(
+        vshl::common::interfaces::IAFBRequest& request,
+        const string eventName,
+        const string voiceagentId);
+
+    // Adds a new voiceagent change observer.
+    bool addVoiceAgentsChangeObserver(shared_ptr<vshl::common::interfaces::IVoiceAgentsChangeObserver> observer);
+
+    // Removes the  voiceagent change observer from the list.
+    bool removeVoiceAgentsChangeObserver(shared_ptr<vshl::common::interfaces::IVoiceAgentsChangeObserver> observer);
+
+    // Destructor
+    ~VoiceAgentsDataManager();
+
+private:
+    // Constructor
+    VoiceAgentsDataManager(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    // Binding API reference
+    shared_ptr<vshl::common::interfaces::IAFBApi> mAfbApi;
+
+    // A list of all the voiceagent change observers
+    unordered_set<shared_ptr<vshl::common::interfaces::IVoiceAgentsChangeObserver>> mVoiceAgentChangeObservers;
+
+    // A map of voiceagents grouped by ID
+    unordered_map<string, shared_ptr<VoiceAgent>> mVoiceAgents;
+
+    // Voiceagent event handler.
+    shared_ptr<VoiceAgentEventsHandler> mVoiceAgentEventsHandler;
+
+    // Default voiceagent
+    string mDefaultVoiceAgentId;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace voiceagents
+}  // namespace vshl
+
+#endif  // VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTS_H_
diff --git a/src/plugins/voiceagents/VoiceAgentsDataManagerImpl.cpp b/src/plugins/voiceagents/VoiceAgentsDataManagerImpl.cpp
new file mode 100644
index 0000000..626a7fc
--- /dev/null
+++ b/src/plugins/voiceagents/VoiceAgentsDataManagerImpl.cpp
@@ -0,0 +1,272 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "voiceagents/VoiceAgentsDataManager.h"
+
+#include "voiceagents/include/VoiceAgentEventsHandler.h"
+
+static string TAG = "vshl::voiceagents::VoiceAgentsDataManager";
+
+/**
+ * Specifies the severity level of a log message
+ */
+using Level = vshl::common::interfaces::ILogger::Level;
+
+namespace vshl {
+namespace voiceagents {
+
+std::unique_ptr<VoiceAgentsDataManager> VoiceAgentsDataManager::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) {
+    return std::unique_ptr<VoiceAgentsDataManager>(new VoiceAgentsDataManager(logger, afbApi));
+}
+
+// Constructor
+VoiceAgentsDataManager::VoiceAgentsDataManager(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) :
+        mLogger(logger),
+        mAfbApi(afbApi) {
+    mVoiceAgentEventsHandler = VoiceAgentEventsHandler::create(mLogger, mAfbApi);
+}
+
+// Destructor
+VoiceAgentsDataManager::~VoiceAgentsDataManager() {
+    // Clear the observers
+    mVoiceAgentChangeObservers.clear();
+    // Clear the voiceagents
+    mVoiceAgents.clear();
+}
+
+uint32_t VoiceAgentsDataManager::activateVoiceAgents(const unordered_set<string>& activeVoiceAgentIds) {
+    if (activeVoiceAgentIds.empty() || mVoiceAgents.empty()) {
+        mLogger->log(Level::ERROR, TAG, "Failed to activate voiceagents");
+        return 0;
+    }
+
+    uint32_t agentsActivated = 0;
+    for (auto voiceAgentId : activeVoiceAgentIds) {
+        auto voiceAgentIt = mVoiceAgents.find(voiceAgentId);
+        if (voiceAgentIt != mVoiceAgents.end()) {
+            // activate the voiceagent
+            ++agentsActivated;
+            if (!voiceAgentIt->second->isActive()) {
+                voiceAgentIt->second->setIsActive(true);
+                // Notify observers
+                for (auto observer : mVoiceAgentChangeObservers) {
+                    observer->OnVoiceAgentActivated(voiceAgentIt->second);
+                }
+            }
+        }
+    }
+    return agentsActivated;
+}
+
+uint32_t VoiceAgentsDataManager::deactivateVoiceAgents(const unordered_set<string>& inactiveVoiceAgentIds) {
+    if (inactiveVoiceAgentIds.empty() || mVoiceAgents.empty()) {
+        mLogger->log(Level::ERROR, TAG, "Failed to deactivate voiceagents");
+        return 0;
+    }
+
+    uint32_t agentsDeactivated = 0;
+    for (auto voiceAgentId : inactiveVoiceAgentIds) {
+        auto voiceAgentIt = mVoiceAgents.find(voiceAgentId);
+        if (voiceAgentIt != mVoiceAgents.end()) {
+            ++agentsDeactivated;
+            if (voiceAgentIt->second->isActive()) {
+                // deactivate the voiceagent
+                voiceAgentIt->second->setIsActive(false);
+                // Notify observers
+                for (auto observer : mVoiceAgentChangeObservers) {
+                    observer->OnVoiceAgentDeactivated(voiceAgentIt->second);
+                }
+            }
+        }
+    }
+
+    return agentsDeactivated;
+}
+
+bool VoiceAgentsDataManager::setDefaultVoiceAgent(const string& voiceAgentId) {
+    if (mVoiceAgents.empty() || voiceAgentId.empty()) {
+        string message = string("Failed to set default voiceagent id: ") + voiceAgentId;
+        mLogger->log(Level::ERROR, TAG, message);
+        return false;
+    }
+
+    auto defaultVoiceAgentIt = mVoiceAgents.find(voiceAgentId);
+
+    if (defaultVoiceAgentIt != mVoiceAgents.end()) {
+        if (mDefaultVoiceAgentId != voiceAgentId) {
+            // Notify observers
+            for (auto observer : mVoiceAgentChangeObservers) {
+                observer->OnDefaultVoiceAgentChanged(defaultVoiceAgentIt->second);
+            }
+        }
+        mDefaultVoiceAgentId = voiceAgentId;
+    } else {
+        mLogger->log(Level::ERROR, TAG, "Can't set default agent. Invalid voice agent id:" + voiceAgentId);
+        return false;
+    }
+
+    return true;
+}
+
+std::string VoiceAgentsDataManager::getDefaultVoiceAgent() {
+    return mDefaultVoiceAgentId;
+}
+
+bool VoiceAgentsDataManager::setActiveWakeWord(const string& voiceAgentId, const string& wakeword) {
+    if (mVoiceAgents.empty() || wakeword.empty()) {
+        string message =
+            string("Failed to set active wakeword: ") + wakeword + string(" for voiceagent id: ") + voiceAgentId;
+        mLogger->log(Level::ERROR, TAG, message);
+        return false;
+    }
+
+    auto voiceAgentIt = mVoiceAgents.find(voiceAgentId);
+    if (voiceAgentIt == mVoiceAgents.end()) {
+        return false;
+    }
+
+    string oldWakeWord = voiceAgentIt->second->getActiveWakeword();
+    if (oldWakeWord != wakeword) {
+        voiceAgentIt->second->setActiveWakeWord(wakeword);
+        // Notify observers
+        for (auto observer : mVoiceAgentChangeObservers) {
+            observer->OnVoiceAgentActiveWakeWordChanged(voiceAgentIt->second);
+        }
+    }
+
+    return true;
+}
+
+bool VoiceAgentsDataManager::addNewVoiceAgent(
+    const string& id,
+    const string& name,
+    const string& description,
+    const string& api,
+    const string& vendor,
+    const string& activeWakeword,
+    const bool isActive,
+    const shared_ptr<unordered_set<string>> wakewords) {
+    shared_ptr<VoiceAgent> voiceAgent =
+        VoiceAgent::create(mLogger, id, name, description, api, vendor, activeWakeword, isActive, wakewords);
+
+    if (voiceAgent.get() == nullptr || voiceAgent->getId().empty()) {
+        string message = string("Invalid Arguments: Failed to add new voiceagent");
+        mLogger->log(Level::ERROR, TAG, message);
+        return false;
+    }
+
+    if (!mVoiceAgents.empty() && mVoiceAgents.find(voiceAgent->getId()) != mVoiceAgents.end()) {
+        string message =
+            string("Failed to add new voiceagent. Voiceagent: ") + voiceAgent->getId() + string(" already exists.");
+        mLogger->log(Level::ERROR, TAG, message);
+        return false;
+    }
+
+    mVoiceAgents.insert(make_pair(voiceAgent->getId(), voiceAgent));
+
+    // Notify the observers
+    for (auto observer : mVoiceAgentChangeObservers) {
+        observer->OnVoiceAgentAdded(voiceAgent);
+    }
+
+    // Create all vshl events for the voiceagent.
+    mVoiceAgentEventsHandler->createVshlEventsForVoiceAgent(voiceAgent->getId());
+
+    return true;
+}
+
+bool VoiceAgentsDataManager::removeVoiceAgent(const string& voiceAgentId) {
+    if (mVoiceAgents.empty()) {
+        string message = string("Failed to remove voiceagent: ") + voiceAgentId + string(". Voiceagents data empty.");
+        mLogger->log(Level::ERROR, TAG, message);
+        return false;
+    }
+
+    auto voiceAgentIt = mVoiceAgents.find(voiceAgentId);
+    if (voiceAgentIt == mVoiceAgents.end()) {
+        string message = string("Failed to remove voiceagent: ") + voiceAgentId + string(". Doesn't exist.");
+        mLogger->log(Level::ERROR, TAG, message);
+        return false;
+    }
+
+    auto voiceAgent = voiceAgentIt->second;
+    // Remove from the map
+    mVoiceAgents.erase(voiceAgentId);
+    // Notify the observers
+    for (auto observer : mVoiceAgentChangeObservers) {
+        observer->OnVoiceAgentRemoved(voiceAgent);
+    }
+
+    // Remove all vshl events for the voiceagent.
+    mVoiceAgentEventsHandler->removeVshlEventsForVoiceAgent(voiceAgent->getId());
+
+    return true;
+}
+
+std::set<std::shared_ptr<vshl::common::interfaces::IVoiceAgent>> VoiceAgentsDataManager::getAllVoiceAgents() {
+    std::set<std::shared_ptr<vshl::common::interfaces::IVoiceAgent>> voiceAgentsSet;
+    for (auto element : mVoiceAgents) {
+        voiceAgentsSet.insert(element.second);
+    }
+
+    return voiceAgentsSet;
+}
+
+// Returns the event filter that belongs to the core module.
+shared_ptr<vshl::common::interfaces::IEventFilter> VoiceAgentsDataManager::getEventFilter() const {
+    return mVoiceAgentEventsHandler;
+}
+
+bool VoiceAgentsDataManager::subscribeToVshlEventFromVoiceAgent(
+    vshl::common::interfaces::IAFBRequest& request,
+    const string eventName,
+    const string voiceAgentId) {
+    auto voiceAgentIt = mVoiceAgents.find(voiceAgentId);
+    if (voiceAgentIt == mVoiceAgents.end()) {
+        mLogger->log(
+            Level::ERROR,
+            TAG,
+            "\
+          Failed to subscribe to VSHL events from voiceagent. VoiceAgent: " +
+                voiceAgentId + " doesn't exist.");
+        return false;
+    }
+    return mVoiceAgentEventsHandler->subscribeToVshlEventFromVoiceAgent(request, eventName, voiceAgentIt->second);
+}
+
+bool VoiceAgentsDataManager::addVoiceAgentsChangeObserver(
+    shared_ptr<vshl::common::interfaces::IVoiceAgentsChangeObserver> observer) {
+    if (!observer) {
+        return false;
+    }
+
+    mVoiceAgentChangeObservers.insert(observer);
+    return true;
+}
+
+bool VoiceAgentsDataManager::removeVoiceAgentsChangeObserver(
+    shared_ptr<vshl::common::interfaces::IVoiceAgentsChangeObserver> observer) {
+    if (!observer) {
+        return false;
+    }
+
+    mVoiceAgentChangeObservers.erase(observer);
+    return true;
+}
+}  // namespace voiceagents
+}  // namespace vshl
diff --git a/src/plugins/voiceagents/include/VoiceAgent.h b/src/plugins/voiceagents/include/VoiceAgent.h
new file mode 100644
index 0000000..4dd55d4
--- /dev/null
+++ b/src/plugins/voiceagents/include/VoiceAgent.h
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_VOICEAGENTS_INCLUDE_VOICEAGENT_H_
+#define VSHL_VOICEAGENTS_INCLUDE_VOICEAGENT_H_
+
+#include <memory>
+#include <unordered_set>
+
+#include "interfaces/utilities/logging/ILogger.h"
+#include "interfaces/voiceagents/IVoiceAgent.h"
+
+using namespace std;
+
+namespace vshl {
+namespace voiceagents {
+/*
+ * Default implementation of IVoiceAgent interface.
+ */
+class VoiceAgent : public vshl::common::interfaces::IVoiceAgent {
+public:
+  // Creates @c VoiceAgent instance
+  static shared_ptr<VoiceAgent>
+  create(shared_ptr<vshl::common::interfaces::ILogger> logger, const string &id,
+         const string &name, const string &description, const string &api,
+         const string &vendor, const string &activeWakeword,
+         const bool isActive,
+         const shared_ptr<unordered_set<string>> wakewords);
+
+  // Destructor
+  ~VoiceAgent();
+
+  // IVoiceAgent overriden methods
+  bool setActiveWakeWord(const string &wakeword) override;
+  void setIsActive(bool active) override;
+  string getId() const override;
+  string getName() const override;
+  string getDescription() const override;
+  string getApi() const override;
+  string getVendor() const override;
+  shared_ptr<unordered_set<string>> getWakeWords() const override;
+  bool isActive() const override;
+  string getActiveWakeword() const override;
+
+private:
+  // Constructor
+  VoiceAgent(shared_ptr<vshl::common::interfaces::ILogger> logger,
+             const string &id, const string &name, const string &description,
+             const string &api, const string &vendor,
+             const string &activeWakeword, const bool isActive,
+             const shared_ptr<unordered_set<string>> wakewords);
+
+  // Logger
+  shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+
+  // Id
+  string mId;
+
+  // Name
+  string mName;
+
+  // Description
+  string mDescription;
+
+  // API
+  string mApi;
+
+  // Vendor
+  string mVendor;
+
+  // Active wakeword
+  string mActiveWakeword;
+
+  // Active ??
+  bool mIsActive;
+
+  // Wakewords
+  shared_ptr<unordered_set<string>> mWakewords;
+};
+
+} // namespace voiceagents
+} // namespace vshl
+
+#endif // VSHL_VOICEAGENTS_INCLUDE_VOICEAGENT_H_
diff --git a/src/plugins/voiceagents/include/VoiceAgentEventsHandler.h b/src/plugins/voiceagents/include/VoiceAgentEventsHandler.h
new file mode 100644
index 0000000..3c1ca6c
--- /dev/null
+++ b/src/plugins/voiceagents/include/VoiceAgentEventsHandler.h
@@ -0,0 +1,95 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#ifndef VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTSTATE_EVENT_HANDLER_H_
+#define VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTSTATE_EVENT_HANDLER_H_
+
+#include <algorithm>
+#include <memory>
+#include <unordered_map>
+
+#include "interfaces/afb/IAFBApi.h"
+#include "interfaces/utilities/events/IEventFilter.h"
+#include "interfaces/utilities/logging/ILogger.h"
+#include "voiceagents/VoiceAgentEventNames.h"
+#include "voiceagents/include/VoiceAgent.h"
+
+using namespace std;
+
+namespace vshl {
+namespace voiceagents {
+/*
+ * This class is reponsible for handling agent specific events
+ * subscription and delivery on behalf of the high level voice service.
+ * This class also listen to the incoming events from voice agents
+ * and implements propagation to application layer.
+ */
+class VoiceAgentEventsHandler : public vshl::common::interfaces::IEventFilter {
+public:
+    // Create a VREventFilter.
+    static shared_ptr<VoiceAgentEventsHandler> create(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    // Creates all the vshl events for a specific voiceagent id.
+    // For e.g if voiceagent is VA-001 then a new vshl event
+    // voice_authstate_event#VA-001 for auth state will be created.
+    // Please see VoiceAgentEventNames.h for all the event names.
+    void createVshlEventsForVoiceAgent(const string voiceAgentId);
+
+    // Removes the events from its bookkeeping.
+    void removeVshlEventsForVoiceAgent(const string voiceAgentId);
+
+    // Subscribe to a vshl event corresponding to a voiceagent.
+    bool subscribeToVshlEventFromVoiceAgent(
+        vshl::common::interfaces::IAFBRequest& request,
+        const string eventName,
+        const shared_ptr<VoiceAgent> voiceAgent);
+
+    ~VoiceAgentEventsHandler();
+
+protected:
+    string getName() override;
+
+    // IEventFilter override
+    bool onIncomingEvent(const string eventName, const string voiceAgentId, const string payload) override;
+
+private:
+    // Constructor
+    VoiceAgentEventsHandler(
+        shared_ptr<vshl::common::interfaces::ILogger> logger,
+        shared_ptr<vshl::common::interfaces::IAFBApi> afbApi);
+
+    // Helper method to generate the event name with voiceagent Id
+    // concatenated.
+    string createEventNameWithVAId(string eventName, string voiceAgentId);
+
+    // call subscribe verb on the voiceagent. True if subscription successful.
+    // False otherwise.
+    bool callSubscribeVerb(const shared_ptr<VoiceAgent> voiceAgent);
+
+    // Binding API reference
+    shared_ptr<vshl::common::interfaces::IAFBApi> mAfbApi;
+
+    // A map of VSHL event ID to its Event object
+    unordered_map<string, shared_ptr<common::interfaces::IAFBApi::IAFBEvent>> mEventsMap;
+
+    // Logger
+    shared_ptr<vshl::common::interfaces::ILogger> mLogger;
+};
+
+}  // namespace voiceagents
+}  // namespace vshl
+
+#endif  // VSHL_VOICEAGENTS_INCLUDE_VOICEAGENTSTATE_EVENT_HANDLER_H_
diff --git a/src/plugins/voiceagents/src/VoiceAgentEventsHandler.cpp b/src/plugins/voiceagents/src/VoiceAgentEventsHandler.cpp
new file mode 100644
index 0000000..4952721
--- /dev/null
+++ b/src/plugins/voiceagents/src/VoiceAgentEventsHandler.cpp
@@ -0,0 +1,139 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include "voiceagents/include/VoiceAgentEventsHandler.h"
+
+static string TAG = "vshl::voiceagents::VoiceAgentEventsHandler";
+static string VA_VERB_SUBSCRIBE = "subscribe";
+
+using Level = vshl::common::interfaces::ILogger::Level;
+using namespace vshl::common::interfaces;
+
+namespace vshl {
+namespace voiceagents {
+
+shared_ptr<VoiceAgentEventsHandler> VoiceAgentEventsHandler::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) {
+    auto eventFilter = std::shared_ptr<VoiceAgentEventsHandler>(new VoiceAgentEventsHandler(logger, afbApi));
+    return eventFilter;
+}
+
+VoiceAgentEventsHandler::VoiceAgentEventsHandler(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    shared_ptr<vshl::common::interfaces::IAFBApi> afbApi) :
+        mAfbApi(afbApi),
+        mLogger(logger) {
+}
+
+VoiceAgentEventsHandler::~VoiceAgentEventsHandler() {
+    mEventsMap.clear();
+}
+
+string VoiceAgentEventsHandler::getName() {
+    return TAG;
+}
+
+void VoiceAgentEventsHandler::createVshlEventsForVoiceAgent(const string voiceAgentId) {
+    // Update the events map with all the VSHL Events.
+    for (auto eventName : VSHL_EVENTS) {
+        string eventNameWithVAId = createEventNameWithVAId(eventName, voiceAgentId);
+        auto it = mEventsMap.find(eventNameWithVAId);
+        if (it == mEventsMap.end() && mAfbApi) {
+            // create a new event and add it to the map.
+            shared_ptr<IAFBApi::IAFBEvent> event = mAfbApi->createEvent(eventNameWithVAId);
+            mEventsMap.insert(make_pair(eventNameWithVAId, event));
+        }
+    }
+}
+
+void VoiceAgentEventsHandler::removeVshlEventsForVoiceAgent(const string voiceAgentId) {
+    // Update the events map with all the VSHL Events.
+    for (auto eventName : VSHL_EVENTS) {
+        string eventNameWithVAId = createEventNameWithVAId(eventName, voiceAgentId);
+        auto it = mEventsMap.find(eventNameWithVAId);
+        if (it != mEventsMap.end()) {
+            mEventsMap.erase(it);
+        }
+    }
+}
+
+bool VoiceAgentEventsHandler::subscribeToVshlEventFromVoiceAgent(
+    vshl::common::interfaces::IAFBRequest& request,
+    const string eventName,
+    const shared_ptr<VoiceAgent> voiceAgent) {
+    auto supportedEventsIt = find(VSHL_EVENTS.begin(), VSHL_EVENTS.end(), eventName);
+    if (supportedEventsIt == VSHL_EVENTS.end()) {
+        mLogger->log(Level::ERROR, TAG, "Event: " + eventName + " not a known event.");
+        return false;
+    }
+
+    // Check if the entry for the voiceagent is present in the
+    // events map. If not then return false because the responsibility
+    // of adding to the map lies in the hands of AddVoiceAgent method.
+    string eventNameWithVAId = createEventNameWithVAId(eventName, voiceAgent->getId());
+    auto createdEventsIt = mEventsMap.find(eventNameWithVAId);
+    if (createdEventsIt == mEventsMap.end()) {
+        mLogger->log(Level::ERROR, TAG, "Not able to subscribe. Event doesn't exist, " + eventNameWithVAId);
+        return false;
+    }
+    createdEventsIt->second->subscribe(request);
+
+    if (!callSubscribeVerb(voiceAgent)) {
+        mLogger->log(Level::WARNING, TAG, "Failed to subscribe to voiceagent: " + voiceAgent->getId());
+    }
+
+    return true;
+}
+
+// IEventFilter override.
+bool VoiceAgentEventsHandler::onIncomingEvent(const string eventName, const string voiceAgentId, const string payload) {
+    string eventNameWithVAId = createEventNameWithVAId(eventName, voiceAgentId);
+    auto it = mEventsMap.find(eventNameWithVAId);
+    if (it != mEventsMap.end()) {
+        return it->second->publishEvent(json_object_new_string(payload.c_str()));
+    }
+
+    return true;
+}
+
+string VoiceAgentEventsHandler::createEventNameWithVAId(string eventName, string voiceAgentId) {
+    return eventName + "#" + voiceAgentId;
+}
+
+bool VoiceAgentEventsHandler::callSubscribeVerb(const shared_ptr<VoiceAgent> voiceAgent) {
+    if (!voiceAgent) {
+        mLogger->log(Level::ERROR, TAG, "Failed to callSubscribeVerb. Invalid input parameter.");
+        return false;
+    }
+
+    if (!mAfbApi) {
+        mLogger->log(
+            Level::ERROR, TAG, "Failed to callSubscribeVerb on voicegent: " + voiceAgent->getId() + ", No API.");
+        return false;
+    }
+
+    // TODO(Naveen): Move to utilities.
+    json_object* object = NULL;
+    std::string error, info;
+    int rc = mAfbApi->callSync(voiceAgent->getApi(), VA_VERB_SUBSCRIBE, NULL, &object, error, info);
+
+    if (object) {
+        free(object);
+    }
+
+    return true;
+}
+}  // namespace voiceagents
+}  // namespace vshl
diff --git a/src/plugins/voiceagents/src/VoiceAgentImpl.cpp b/src/plugins/voiceagents/src/VoiceAgentImpl.cpp
new file mode 100644
index 0000000..f2ef8a1
--- /dev/null
+++ b/src/plugins/voiceagents/src/VoiceAgentImpl.cpp
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+#include <sstream>
+
+#include "voiceagents/include/VoiceAgent.h"
+
+static string TAG = "vshl::voiceagents::VoiceAgent";
+
+/**
+ * Specifies the severity level of a log message
+ */
+using Level = vshl::common::interfaces::ILogger::Level;
+
+namespace vshl {
+namespace voiceagents {
+// Creates @c VoiceAgent instance
+shared_ptr<VoiceAgent> VoiceAgent::create(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    const string& id,
+    const string& name,
+    const string& description,
+    const string& api,
+    const string& vendor,
+    const string& activeWakeword,
+    const bool isActive,
+    const shared_ptr<unordered_set<string>> wakewords) {
+    if (wakewords == nullptr) {
+        logger->log(Level::ERROR, TAG, "Wakeword list null");
+        return nullptr;
+    }
+
+    auto voiceAgent = std::unique_ptr<VoiceAgent>(
+        new VoiceAgent(logger, id, name, description, api, vendor, activeWakeword, isActive, wakewords));
+    if (!voiceAgent->setActiveWakeWord(activeWakeword)) {
+        return nullptr;
+    }
+
+    return voiceAgent;
+}
+
+VoiceAgent::VoiceAgent(
+    shared_ptr<vshl::common::interfaces::ILogger> logger,
+    const string& id,
+    const string& name,
+    const string& description,
+    const string& api,
+    const string& vendor,
+    const string& activeWakeword,
+    const bool isActive,
+    const shared_ptr<unordered_set<string>> wakewords) :
+        mLogger(logger),
+        mId(id),
+        mName(name),
+        mDescription(description),
+        mApi(api),
+        mVendor(vendor),
+        mActiveWakeword(activeWakeword),
+        mIsActive(isActive),
+        mWakewords(wakewords) {
+}
+
+// Destructor
+VoiceAgent::~VoiceAgent() {
+}
+
+// Set the active wakeword for this voiceagent
+bool VoiceAgent::setActiveWakeWord(const string& wakeword) {
+    if (mWakewords->find(wakeword) != mWakewords->end()) {
+        mActiveWakeword = wakeword;
+        return true;
+    }
+
+    mLogger->log(Level::ERROR, TAG, "Wakeword: " + wakeword + " doesn't exist in wakeword list");
+    return false;
+}
+
+// Sets the activation state of this voiceagent
+void VoiceAgent::setIsActive(bool active) {
+    mIsActive = active;
+}
+
+string VoiceAgent::getId() const {
+    return mId;
+}
+
+string VoiceAgent::getName() const {
+    return mName;
+}
+
+string VoiceAgent::getDescription() const {
+    return mDescription;
+}
+
+string VoiceAgent::getApi() const {
+    return mApi;
+}
+
+string VoiceAgent::getVendor() const {
+    return mVendor;
+}
+
+shared_ptr<unordered_set<string>> VoiceAgent::getWakeWords() const {
+    return mWakewords;
+}
+
+bool VoiceAgent::isActive() const {
+    return mIsActive;
+}
+
+string VoiceAgent::getActiveWakeword() const {
+    return mActiveWakeword;
+}
+}  // namespace voiceagents
+}  // namespace vshl
diff --git a/src/plugins/voiceagents/test/VoiceAgentTest.cpp b/src/plugins/voiceagents/test/VoiceAgentTest.cpp
new file mode 100644
index 0000000..e5ad15e
--- /dev/null
+++ b/src/plugins/voiceagents/test/VoiceAgentTest.cpp
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include "voiceagents/include/VoiceAgent.h"
+
+#include "voiceagents/test/VoiceAgentsTestData.h"
+#include "test/common/ConsoleLogger.h"
+
+using namespace vshl::voiceagents;
+using namespace vshl::test::common;
+
+namespace vshl {
+namespace test {
+
+class VoiceAgentTest : public ::testing::Test {
+protected:
+    void SetUp() override {
+        mConsoleLogger = std::make_shared<ConsoleLogger>();
+
+        mVoiceAgentData = *(getVoiceAgentsTestData().begin());
+        mVoiceAgent = VoiceAgent::create(
+            mConsoleLogger,
+            mVoiceAgentData.id,
+            mVoiceAgentData.name,
+            mVoiceAgentData.description,
+            mVoiceAgentData.api,
+            mVoiceAgentData.vendor,
+            mVoiceAgentData.activeWakeword,
+            mVoiceAgentData.isActive,
+            mVoiceAgentData.wakewords);
+    }
+
+    std::shared_ptr<ConsoleLogger> mConsoleLogger;
+    std::shared_ptr<VoiceAgent> mVoiceAgent;
+    VoiceAgentTestData mVoiceAgentData;
+};
+
+TEST_F(VoiceAgentTest, InitializesCorrectly) {
+    ASSERT_NE(mVoiceAgent, nullptr);
+    ASSERT_EQ(mVoiceAgent->getId(), mVoiceAgentData.id);
+    ASSERT_EQ(mVoiceAgent->getName(), mVoiceAgentData.name);
+    ASSERT_EQ(mVoiceAgent->getDescription(), mVoiceAgentData.description);
+    ASSERT_EQ(mVoiceAgent->getApi(), mVoiceAgentData.api);
+    ASSERT_EQ(mVoiceAgent->getVendor(), mVoiceAgentData.vendor);
+    ASSERT_EQ(mVoiceAgent->getActiveWakeword(), mVoiceAgentData.activeWakeword);
+    ASSERT_EQ(mVoiceAgent->isActive(), mVoiceAgentData.isActive);
+
+    std::unordered_set<std::string> wakeWords = *mVoiceAgentData.wakewords;
+    ASSERT_EQ(*(mVoiceAgent->getWakeWords()), wakeWords);
+}
+
+TEST_F(VoiceAgentTest, FailsCreationOnNonExistentWakeword) {
+    std::string nonExistentWW = "non-existent";
+    auto voiceAgent = VoiceAgent::create(
+        mConsoleLogger,
+        mVoiceAgentData.id,
+        mVoiceAgentData.name,
+        mVoiceAgentData.description,
+        mVoiceAgentData.api,
+        mVoiceAgentData.vendor,
+        nonExistentWW,
+        mVoiceAgentData.isActive,
+        mVoiceAgentData.wakewords);
+    ASSERT_EQ(voiceAgent, nullptr);
+}
+
+TEST_F(VoiceAgentTest, SetsWakewordCorrectly) {
+    std::string wakeword = *(mVoiceAgentData.wakewords->begin());
+    ASSERT_TRUE(mVoiceAgent->setActiveWakeWord(wakeword));
+    ASSERT_EQ(mVoiceAgent->getActiveWakeword(), wakeword);
+}
+
+TEST_F(VoiceAgentTest, FailsToSetNonExistentWakeword) {
+    std::string nonExistentWW = "non-existent";
+    ASSERT_FALSE(mVoiceAgent->setActiveWakeWord(nonExistentWW));
+    ASSERT_EQ(mVoiceAgent->getActiveWakeword(), mVoiceAgentData.activeWakeword);
+}
+
+}  // namespace test
+}  // namespace vshl
\ No newline at end of file
diff --git a/src/plugins/voiceagents/test/VoiceAgentsDataManagerTest.cpp b/src/plugins/voiceagents/test/VoiceAgentsDataManagerTest.cpp
new file mode 100644
index 0000000..58c62ed
--- /dev/null
+++ b/src/plugins/voiceagents/test/VoiceAgentsDataManagerTest.cpp
@@ -0,0 +1,294 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include "voiceagents/VoiceAgentsDataManager.h"
+
+#include "test/common/ConsoleLogger.h"
+#include "test/mocks/AFBApiMock.h"
+#include "test/mocks/VoiceAgentsChangeObserverMock.h"
+#include "voiceagents/test/VoiceAgentsTestData.h"
+
+using namespace vshl::common::interfaces;
+using namespace vshl::voiceagents;
+
+using namespace vshl::test::common;
+
+namespace vshl {
+namespace test {
+
+class VoiceAgentDataManagerTest : public ::testing::Test {
+protected:
+  void SetUp() override {
+    mConsoleLogger = std::make_shared<ConsoleLogger>();
+    mAfbApi = std::make_shared<::testing::NiceMock<AFBApiMock>>();
+    mVADataManager = VoiceAgentsDataManager::create(mConsoleLogger, mAfbApi);
+
+    mAgentsChangeObserver = std::make_shared<
+        ::testing::StrictMock<VoiceAgentsChangeObserverMock>>();
+    mVADataManager->addVoiceAgentsChangeObserver(mAgentsChangeObserver);
+
+    mVoiceAgentsData = getVoiceAgentsTestData();
+  }
+
+  void TearDown() override {
+    mVADataManager->removeVoiceAgentsChangeObserver(mAgentsChangeObserver);
+  }
+
+  static bool addVoiceAgent(VoiceAgentsDataManager &mgr,
+                            VoiceAgentTestData &data) {
+    return mgr.addNewVoiceAgent(data.id, data.name, data.description, data.api,
+                                data.vendor, data.activeWakeword, data.isActive,
+                                data.wakewords);
+  }
+
+  static bool isEqual(const VoiceAgentTestData &lhs, const IVoiceAgent &rhs) {
+    return lhs.id == rhs.getId() && lhs.name == rhs.getName() &&
+           lhs.description == rhs.getDescription() && lhs.api == rhs.getApi() &&
+           lhs.vendor == rhs.getVendor() &&
+           lhs.activeWakeword == rhs.getActiveWakeword() &&
+           lhs.isActive == rhs.isActive() &&
+           *lhs.wakewords == *rhs.getWakeWords();
+  }
+
+  static std::shared_ptr<IVoiceAgent>
+  findVoiceAgent(std::set<std::shared_ptr<IVoiceAgent>> &voiceAgents,
+                 std::string &vaId) {
+    for (auto va : voiceAgents) {
+      if (va->getId() == vaId)
+        return va;
+    }
+
+    return nullptr;
+  }
+
+  std::shared_ptr<ConsoleLogger> mConsoleLogger;
+
+  // It is a NiceMock because we don't want gtest to produce warnings about non
+  // interesting calls.
+  // The non interesting calls like createEvent is internal implementation
+  // detail for many of the
+  // tests in this class, and hence suppression of these warnings with NiceMock.
+  std::shared_ptr<::testing::NiceMock<AFBApiMock>> mAfbApi;
+
+  // It is a StrictMock because we want to fail the test for all non interesting
+  // calls.
+  std::shared_ptr<::testing::StrictMock<VoiceAgentsChangeObserverMock>>
+      mAgentsChangeObserver;
+
+  std::vector<VoiceAgentTestData> mVoiceAgentsData;
+  std::unique_ptr<VoiceAgentsDataManager> mVADataManager;
+};
+
+TEST_F(VoiceAgentDataManagerTest, InitializesCorrectly) {
+  ASSERT_NE(mVADataManager, nullptr);
+  ASSERT_EQ(mVADataManager->getAllVoiceAgents().size(), 0);
+  ASSERT_EQ(mVADataManager->getDefaultVoiceAgent(), std::string());
+}
+
+TEST_F(VoiceAgentDataManagerTest, addingVoiceAgentWithSameIdFails) {
+  EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentAdded(::testing::_)).Times(1);
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+  ASSERT_FALSE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+
+  auto allVoiceAgents = mVADataManager->getAllVoiceAgents();
+  ASSERT_EQ(allVoiceAgents.size(), 1);
+}
+
+TEST_F(VoiceAgentDataManagerTest,
+       addingVoiceAgentWithNonExistentActiveWakewordFails) {
+  auto voiceAgetData = mVoiceAgentsData[0];
+  voiceAgetData.activeWakeword = "non-existent";
+  ASSERT_FALSE(addVoiceAgent(*mVADataManager, voiceAgetData));
+
+  auto allVoiceAgents = mVADataManager->getAllVoiceAgents();
+  ASSERT_EQ(allVoiceAgents.size(), 0);
+}
+
+TEST_F(VoiceAgentDataManagerTest, canAddNewVoiceAgents) {
+  EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentAdded(::testing::_)).Times(2);
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+
+  auto allVoiceAgents = mVADataManager->getAllVoiceAgents();
+  ASSERT_EQ(allVoiceAgents.size(), 1);
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[1]));
+
+  allVoiceAgents = mVADataManager->getAllVoiceAgents();
+  ASSERT_EQ(allVoiceAgents.size(), 2);
+
+  for (auto va : allVoiceAgents) {
+    bool voiceAgentFound = false;
+    for (auto vaData : mVoiceAgentsData) {
+      if (isEqual(vaData, *va)) {
+        voiceAgentFound = true;
+        break;
+      }
+    }
+    ASSERT_TRUE(voiceAgentFound);
+  }
+}
+
+TEST_F(VoiceAgentDataManagerTest, removingUnknonwVoiceAgentFails) {
+  EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentAdded(::testing::_)).Times(1);
+
+  ASSERT_FALSE(mVADataManager->removeVoiceAgent("non-existent-vaid"));
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+  ASSERT_FALSE(mVADataManager->removeVoiceAgent("non-existent-vaid"));
+}
+
+TEST_F(VoiceAgentDataManagerTest, canRemoveVoiceAgents) {
+  EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentAdded(::testing::_)).Times(2);
+  EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentRemoved(::testing::_))
+      .Times(2);
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[1]));
+
+  auto allVoiceAgents = mVADataManager->getAllVoiceAgents();
+  ASSERT_EQ(allVoiceAgents.size(), 2);
+
+  ASSERT_TRUE(mVADataManager->removeVoiceAgent(mVoiceAgentsData[0].id));
+
+  allVoiceAgents = mVADataManager->getAllVoiceAgents();
+  ASSERT_EQ(allVoiceAgents.size(), 1);
+
+  ASSERT_TRUE(mVADataManager->removeVoiceAgent(mVoiceAgentsData[1].id));
+
+  allVoiceAgents = mVADataManager->getAllVoiceAgents();
+  ASSERT_EQ(allVoiceAgents.size(), 0);
+}
+
+TEST_F(VoiceAgentDataManagerTest, activatingNonExistentVoiceAgentsFails) {
+  uint32_t result = mVADataManager->activateVoiceAgents({"non", "existent"});
+  ASSERT_EQ(result, 0);
+
+  EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentAdded(::testing::_)).Times(2);
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[1]));
+
+  result = mVADataManager->activateVoiceAgents({"non", "existent"});
+  ASSERT_EQ(result, 0);
+}
+
+TEST_F(VoiceAgentDataManagerTest, deactivatingNonExistentVoiceAgentsFails) {
+  uint32_t result = mVADataManager->deactivateVoiceAgents({"non", "existent"});
+  ASSERT_EQ(result, 0);
+
+  EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentAdded(::testing::_)).Times(2);
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[1]));
+
+  result = mVADataManager->deactivateVoiceAgents({"non", "existent"});
+  ASSERT_EQ(result, 0);
+}
+
+TEST_F(VoiceAgentDataManagerTest, canActivateDeactivateVoiceAgents) {
+  {
+    ::testing::InSequence dummy;
+
+    EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentAdded(::testing::_))
+        .Times(2);
+    EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentDeactivated(::testing::_))
+        .Times(1);
+    EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentActivated(::testing::_))
+        .Times(1);
+  }
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[1]));
+
+  std::string vaId = mVoiceAgentsData[0].id;
+
+  auto allVA = mVADataManager->getAllVoiceAgents();
+  auto voiceAgent = findVoiceAgent(allVA, vaId);
+  ASSERT_NE(voiceAgent, nullptr);
+  ASSERT_TRUE(voiceAgent->isActive());
+
+  uint32_t result =
+      mVADataManager->deactivateVoiceAgents({"non-existent", vaId});
+  ASSERT_EQ(result, 1);
+  ASSERT_FALSE(voiceAgent->isActive());
+
+  // Try de-activating already de-activated agent
+  result = mVADataManager->deactivateVoiceAgents({vaId});
+  ASSERT_EQ(result, 1);
+  ASSERT_FALSE(voiceAgent->isActive());
+
+  result = mVADataManager->activateVoiceAgents({"non-existent", vaId});
+  ASSERT_EQ(result, 1);
+  ASSERT_TRUE(voiceAgent->isActive());
+
+  // Try activating already activated agent
+  result = mVADataManager->activateVoiceAgents({vaId});
+  ASSERT_EQ(result, 1);
+  ASSERT_TRUE(voiceAgent->isActive());
+}
+
+TEST_F(VoiceAgentDataManagerTest,
+       NoDefaultAgentIsReturnedWhenNoDefaultAgentIsSet) {
+  EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentAdded(::testing::_)).Times(2);
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[1]));
+
+  std::string defaultAgentId = mVADataManager->getDefaultVoiceAgent();
+  ASSERT_EQ(defaultAgentId, "");
+}
+
+TEST_F(VoiceAgentDataManagerTest, DefaultAgentCanBeSet) {
+  EXPECT_CALL(*mAgentsChangeObserver, OnVoiceAgentAdded(::testing::_)).Times(2);
+
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[0]));
+  ASSERT_TRUE(addVoiceAgent(*mVADataManager, mVoiceAgentsData[1]));
+
+  auto allAgents = mVADataManager->getAllVoiceAgents();
+  std::string vaId1 = mVoiceAgentsData[1].id;
+  std::string vaId2 = mVoiceAgentsData[0].id;
+  auto va1 = findVoiceAgent(allAgents, vaId1);
+  auto va2 = findVoiceAgent(allAgents, vaId2);
+
+  {
+    ::testing::InSequence dummy;
+
+    EXPECT_CALL(*mAgentsChangeObserver, OnDefaultVoiceAgentChanged(va1))
+        .Times(1);
+    EXPECT_CALL(*mAgentsChangeObserver, OnDefaultVoiceAgentChanged(va2))
+        .Times(1);
+  }
+
+  ASSERT_TRUE(mVADataManager->setDefaultVoiceAgent(vaId1));
+  ASSERT_EQ(mVADataManager->getDefaultVoiceAgent(), vaId1);
+
+  ASSERT_TRUE(mVADataManager->setDefaultVoiceAgent(vaId2));
+  ASSERT_EQ(mVADataManager->getDefaultVoiceAgent(), vaId2);
+
+  ASSERT_FALSE(mVADataManager->setDefaultVoiceAgent("non-existent"));
+  ASSERT_EQ(mVADataManager->getDefaultVoiceAgent(), vaId2);
+
+  // Setting default agent to already default agent shouldn't result in extra
+  // callback to OnDefaultVoiceAgentChanged
+  ASSERT_TRUE(mVADataManager->setDefaultVoiceAgent(vaId2));
+  ASSERT_EQ(mVADataManager->getDefaultVoiceAgent(), vaId2);
+}
+
+} // namespace test
+} // namespace vshl
\ No newline at end of file
diff --git a/src/plugins/voiceagents/test/VoiceAgentsTestData.h b/src/plugins/voiceagents/test/VoiceAgentsTestData.h
new file mode 100644
index 0000000..ced068f
--- /dev/null
+++ b/src/plugins/voiceagents/test/VoiceAgentsTestData.h
@@ -0,0 +1,67 @@
+/*
+ * Copyright 2018-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License").
+ * You may not use this file except in compliance with the License.
+ * A copy of the License is located at
+ *
+ *     http://aws.amazon.com/apache2.0/
+ *
+ * or in the "license" file accompanying this file. This file is distributed
+ * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
+ * express or implied. See the License for the specific language governing
+ * permissions and limitations under the License.
+ */
+
+#include <memory>
+#include <string>
+#include <unordered_set>
+#include <vector>
+
+namespace vshl {
+namespace test {
+
+typedef std::shared_ptr<std::unordered_set<std::string>> WakeWords;
+
+struct VoiceAgentTestData {
+    std::string id;
+    std::string name;
+    std::string description;
+    std::string api;
+    std::string vendor;
+    std::string activeWakeword;
+    bool isActive;
+    WakeWords wakewords;
+};
+
+static std::vector<VoiceAgentTestData> getVoiceAgentsTestData() {
+    std::vector<VoiceAgentTestData> voiceAgentsTestData{
+        {
+            "VA-001",                           // Id
+            "Foundation",                       // Name
+            "Voice Agent For Galactic Empire",  // Description
+            "api-1",                            // API
+            "Asimov",                           // Vendor
+            "Hari Seldon",                      // Active Wakeword
+            true,                               // Is Active
+            std::shared_ptr<std::unordered_set<std::string>>(
+                new std::unordered_set<std::string>{"Hari Seldon", "Cleon I ", "Eto Demerzel"})  // Wake Words
+        },
+        {
+            "VA-002",                         // Id
+            "Betelgeuse",                     // Name
+            "Voice Agent For Galaxy hopper",  // Description
+            "api-2",                          // API
+            "Douglas Adams",                  // Vendor
+            "Ford Prefect",                   // Active Wakeword
+            true,                             // Is Active
+            std::shared_ptr<std::unordered_set<std::string>>(
+                new std::unordered_set<std::string>{"Ford Prefect", "Zaphod Beeblebrox"})  // Wake Words
+        },
+    };
+
+    return voiceAgentsTestData;
+}
+
+}  // namespace test
+}  // namespace vshl