diff --git a/ruoyi-wcs/src/main/java/com/ruoyi/wcs/application/task/CreateTransportOrderCommand.java b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/application/task/CreateTransportOrderCommand.java
new file mode 100644
index 0000000..999523a
--- /dev/null
+++ b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/application/task/CreateTransportOrderCommand.java
@@ -0,0 +1,76 @@
+package com.ruoyi.wcs.application.task;
+
+import com.ruoyi.wcs.domain.task.TransportOrderType;
+
+import java.time.Instant;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+
+public final class CreateTransportOrderCommand {
+    private final String externalRequestId;
+    private final TransportOrderType orderType;
+    private final String loadId;
+    private final String sourceCode;
+    private final String destinationCode;
+    private final int priority;
+    private final Instant deadline;
+    private final Map<String, String> attributes;
+
+    public CreateTransportOrderCommand(String externalRequestId,
+                                       TransportOrderType orderType,
+                                       String loadId, String sourceCode,
+                                       String destinationCode, int priority,
+                                       Instant deadline,
+                                       Map<String, String> attributes) {
+        this.externalRequestId = requireText(externalRequestId, "externalRequestId");
+        this.orderType = Objects.requireNonNull(orderType, "orderType");
+        this.loadId = loadId;
+        this.sourceCode = requireText(sourceCode, "sourceCode");
+        this.destinationCode = requireText(destinationCode, "destinationCode");
+        this.priority = priority;
+        this.deadline = deadline;
+        this.attributes = Collections.unmodifiableMap(new LinkedHashMap<String, String>(
+                Objects.requireNonNull(attributes, "attributes")));
+    }
+
+    public String getExternalRequestId() {
+        return externalRequestId;
+    }
+
+    public TransportOrderType getOrderType() {
+        return orderType;
+    }
+
+    public String getLoadId() {
+        return loadId;
+    }
+
+    public String getSourceCode() {
+        return sourceCode;
+    }
+
+    public String getDestinationCode() {
+        return destinationCode;
+    }
+
+    public int getPriority() {
+        return priority;
+    }
+
+    public Instant getDeadline() {
+        return deadline;
+    }
+
+    public Map<String, String> getAttributes() {
+        return attributes;
+    }
+
+    private static String requireText(String value, String field) {
+        if (value == null || value.trim().isEmpty()) {
+            throw new IllegalArgumentException(field + " must not be blank");
+        }
+        return value;
+    }
+}
diff --git a/ruoyi-wcs/src/main/java/com/ruoyi/wcs/application/task/TransportOrderApplicationService.java b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/application/task/TransportOrderApplicationService.java
new file mode 100644
index 0000000..2d3fdf0
--- /dev/null
+++ b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/application/task/TransportOrderApplicationService.java
@@ -0,0 +1,130 @@
+package com.ruoyi.wcs.application.task;
+
+import com.ruoyi.wcs.domain.shared.DomainEvent;
+import com.ruoyi.wcs.domain.shared.IdGenerator;
+import com.ruoyi.wcs.domain.shared.WcsClock;
+import com.ruoyi.wcs.domain.task.TransportOrder;
+import com.ruoyi.wcs.domain.task.TransportOrderState;
+import com.ruoyi.wcs.domain.task.WorkflowDefinition;
+import com.ruoyi.wcs.domain.task.WorkflowInstance;
+import com.ruoyi.wcs.port.in.TransportOrderUseCase;
+import com.ruoyi.wcs.port.out.DomainEventPublisher;
+import com.ruoyi.wcs.port.out.TransportOrderRepository;
+import com.ruoyi.wcs.port.out.WorkflowDefinitionProvider;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.List;
+import java.util.Objects;
+
+public final class TransportOrderApplicationService implements TransportOrderUseCase {
+    private final TransportOrderRepository repository;
+    private final WorkflowDefinitionProvider workflowDefinitions;
+    private final DomainEventPublisher eventPublisher;
+    private final IdGenerator idGenerator;
+    private final WcsClock clock;
+
+    public TransportOrderApplicationService(TransportOrderRepository repository,
+                                            WorkflowDefinitionProvider workflowDefinitions,
+                                            DomainEventPublisher eventPublisher,
+                                            IdGenerator idGenerator,
+                                            WcsClock clock) {
+        this.repository = Objects.requireNonNull(repository, "repository");
+        this.workflowDefinitions = Objects.requireNonNull(
+                workflowDefinitions, "workflowDefinitions");
+        this.eventPublisher = Objects.requireNonNull(eventPublisher, "eventPublisher");
+        this.idGenerator = Objects.requireNonNull(idGenerator, "idGenerator");
+        this.clock = Objects.requireNonNull(clock, "clock");
+    }
+
+    @Override
+    @Transactional
+    public TransportOrderResult create(CreateTransportOrderCommand command) {
+        Objects.requireNonNull(command, "command");
+        TransportOrder existing = repository.findByExternalRequestId(
+                command.getExternalRequestId());
+        if (existing != null) {
+            return TransportOrderResult.from(existing);
+        }
+
+        TransportOrder order = TransportOrder.accept(
+                idGenerator.nextId(),
+                command.getExternalRequestId(),
+                command.getOrderType(),
+                command.getLoadId(),
+                command.getSourceCode(),
+                command.getDestinationCode(),
+                command.getPriority(),
+                clock.now());
+        WorkflowDefinition definition = workflowDefinitions.definitionFor(order.getType());
+        WorkflowInstance workflow = WorkflowInstance.create(
+                idGenerator.nextId(), order.getOrderId(), definition);
+        order.plan(workflow.getWorkflowId());
+
+        repository.save(order, workflow);
+        publishAndClear(order);
+        return TransportOrderResult.from(order);
+    }
+
+    @Override
+    @Transactional
+    public TransportOrderResult cancel(String externalRequestId) {
+        TransportOrder order = requireByExternalRequestId(externalRequestId);
+        order.cancel();
+        repository.save(order);
+        publishAndClear(order);
+        return TransportOrderResult.from(order);
+    }
+
+    @Override
+    @Transactional
+    public TransportOrderResult suspend(String orderId, String reason) {
+        TransportOrder order = requireByOrderId(orderId);
+        order.suspend(reason);
+        repository.save(order);
+        publishAndClear(order);
+        return TransportOrderResult.from(order);
+    }
+
+    @Override
+    @Transactional
+    public TransportOrderResult resume(String orderId) {
+        TransportOrder order = requireByOrderId(orderId);
+        if (order.getWorkflowId() == null) {
+            throw new IllegalStateException("accepted order has no workflow to resume");
+        }
+        order.resumeToPlanned();
+        repository.save(order);
+        publishAndClear(order);
+        return TransportOrderResult.from(order);
+    }
+
+    private void publishAndClear(TransportOrder order) {
+        List<DomainEvent> events = order.getUncommittedEvents();
+        eventPublisher.publish(events);
+        order.clearUncommittedEvents();
+    }
+
+    private TransportOrder requireByExternalRequestId(String externalRequestId) {
+        TransportOrder order = repository.findByExternalRequestId(
+                requireText(externalRequestId, "externalRequestId"));
+        if (order == null) {
+            throw new IllegalArgumentException("transport order not found");
+        }
+        return order;
+    }
+
+    private TransportOrder requireByOrderId(String orderId) {
+        TransportOrder order = repository.findByOrderId(requireText(orderId, "orderId"));
+        if (order == null) {
+            throw new IllegalArgumentException("transport order not found");
+        }
+        return order;
+    }
+
+    private static String requireText(String value, String field) {
+        if (value == null || value.trim().isEmpty()) {
+            throw new IllegalArgumentException(field + " must not be blank");
+        }
+        return value;
+    }
+}
diff --git a/ruoyi-wcs/src/main/java/com/ruoyi/wcs/application/task/TransportOrderResult.java b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/application/task/TransportOrderResult.java
new file mode 100644
index 0000000..fd0a8db
--- /dev/null
+++ b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/application/task/TransportOrderResult.java
@@ -0,0 +1,57 @@
+package com.ruoyi.wcs.application.task;
+
+import com.ruoyi.wcs.domain.task.TransportOrder;
+import com.ruoyi.wcs.domain.task.TransportOrderState;
+import com.ruoyi.wcs.domain.task.TransportOrderType;
+
+public final class TransportOrderResult {
+    private final String orderId;
+    private final String externalRequestId;
+    private final TransportOrderType orderType;
+    private final String sourceCode;
+    private final String destinationCode;
+    private final TransportOrderState state;
+    private final String workflowId;
+
+    private TransportOrderResult(TransportOrder order) {
+        this.orderId = order.getOrderId();
+        this.externalRequestId = order.getExternalRequestId();
+        this.orderType = order.getType();
+        this.sourceCode = order.getSourceCode();
+        this.destinationCode = order.getDestinationCode();
+        this.state = order.getState();
+        this.workflowId = order.getWorkflowId();
+    }
+
+    public static TransportOrderResult from(TransportOrder order) {
+        return new TransportOrderResult(order);
+    }
+
+    public String getOrderId() {
+        return orderId;
+    }
+
+    public String getExternalRequestId() {
+        return externalRequestId;
+    }
+
+    public TransportOrderType getOrderType() {
+        return orderType;
+    }
+
+    public String getSourceCode() {
+        return sourceCode;
+    }
+
+    public String getDestinationCode() {
+        return destinationCode;
+    }
+
+    public TransportOrderState getState() {
+        return state;
+    }
+
+    public String getWorkflowId() {
+        return workflowId;
+    }
+}
diff --git a/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/in/TransportOrderUseCase.java b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/in/TransportOrderUseCase.java
new file mode 100644
index 0000000..fe28ccd
--- /dev/null
+++ b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/in/TransportOrderUseCase.java
@@ -0,0 +1,14 @@
+package com.ruoyi.wcs.port.in;
+
+import com.ruoyi.wcs.application.task.CreateTransportOrderCommand;
+import com.ruoyi.wcs.application.task.TransportOrderResult;
+
+public interface TransportOrderUseCase {
+    TransportOrderResult create(CreateTransportOrderCommand command);
+
+    TransportOrderResult cancel(String externalRequestId);
+
+    TransportOrderResult suspend(String orderId, String reason);
+
+    TransportOrderResult resume(String orderId);
+}
diff --git a/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/DomainEventPublisher.java b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/DomainEventPublisher.java
new file mode 100644
index 0000000..eea7b46
--- /dev/null
+++ b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/DomainEventPublisher.java
@@ -0,0 +1,9 @@
+package com.ruoyi.wcs.port.out;
+
+import com.ruoyi.wcs.domain.shared.DomainEvent;
+
+import java.util.List;
+
+public interface DomainEventPublisher {
+    void publish(List<DomainEvent> domainEvents);
+}
diff --git a/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/TransportOrderRepository.java b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/TransportOrderRepository.java
new file mode 100644
index 0000000..ba80693
--- /dev/null
+++ b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/TransportOrderRepository.java
@@ -0,0 +1,14 @@
+package com.ruoyi.wcs.port.out;
+
+import com.ruoyi.wcs.domain.task.TransportOrder;
+import com.ruoyi.wcs.domain.task.WorkflowInstance;
+
+public interface TransportOrderRepository {
+    TransportOrder findByExternalRequestId(String externalRequestId);
+
+    TransportOrder findByOrderId(String orderId);
+
+    void save(TransportOrder order, WorkflowInstance workflow);
+
+    void save(TransportOrder order);
+}
diff --git a/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/WmsNotification.java b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/WmsNotification.java
new file mode 100644
index 0000000..e2b2d52
--- /dev/null
+++ b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/WmsNotification.java
@@ -0,0 +1,72 @@
+package com.ruoyi.wcs.port.out;
+
+import java.time.Instant;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
+
+public final class WmsNotification {
+    private final String eventId;
+    private final String externalRequestId;
+    private final String orderId;
+    private final Instant occurredAt;
+    private final String eventType;
+    private final String resultCode;
+    private final String resultMessage;
+    private final Map<String, String> context;
+
+    public WmsNotification(String eventId, String externalRequestId,
+                           String orderId, Instant occurredAt,
+                           String eventType, String resultCode,
+                           String resultMessage, Map<String, String> context) {
+        this.eventId = requireText(eventId, "eventId");
+        this.externalRequestId = requireText(externalRequestId, "externalRequestId");
+        this.orderId = requireText(orderId, "orderId");
+        this.occurredAt = Objects.requireNonNull(occurredAt, "occurredAt");
+        this.eventType = requireText(eventType, "eventType");
+        this.resultCode = resultCode;
+        this.resultMessage = resultMessage;
+        this.context = Collections.unmodifiableMap(new LinkedHashMap<String, String>(
+                Objects.requireNonNull(context, "context")));
+    }
+
+    public String getEventId() {
+        return eventId;
+    }
+
+    public String getExternalRequestId() {
+        return externalRequestId;
+    }
+
+    public String getOrderId() {
+        return orderId;
+    }
+
+    public Instant getOccurredAt() {
+        return occurredAt;
+    }
+
+    public String getEventType() {
+        return eventType;
+    }
+
+    public String getResultCode() {
+        return resultCode;
+    }
+
+    public String getResultMessage() {
+        return resultMessage;
+    }
+
+    public Map<String, String> getContext() {
+        return context;
+    }
+
+    private static String requireText(String value, String field) {
+        if (value == null || value.trim().isEmpty()) {
+            throw new IllegalArgumentException(field + " must not be blank");
+        }
+        return value;
+    }
+}
diff --git a/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/WmsNotificationGateway.java b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/WmsNotificationGateway.java
new file mode 100644
index 0000000..0a4582c
--- /dev/null
+++ b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/WmsNotificationGateway.java
@@ -0,0 +1,5 @@
+package com.ruoyi.wcs.port.out;
+
+public interface WmsNotificationGateway {
+    WmsNotificationReceipt notify(WmsNotification notification);
+}
diff --git a/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/WmsNotificationReceipt.java b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/WmsNotificationReceipt.java
new file mode 100644
index 0000000..0f15e2c
--- /dev/null
+++ b/ruoyi-wcs/src/main/java/com/ruoyi/wcs/port/out/WmsNotificationReceipt.java
@@ -0,0 +1,27 @@
+package com.ruoyi.wcs.port.out;
+
+import java.util.Objects;
+
+public final class WmsNotificationReceipt {
+    public enum Status {
+        DELIVERED,
+        RETRYABLE_FAILURE,
+        PERMANENT_FAILURE
+    }
+
+    private final Status status;
+    private final String detail;
+
+    public WmsNotificationReceipt(Status status, String detail) {
+        this.status = Objects.requireNonNull(status, "status");
+        this.detail = detail;
+    }
+
+    public Status getStatus() {
+        return status;
+    }
+
+    public String getDetail() {
+        return detail;
+    }
+}
diff --git a/ruoyi-wcs/src/test/java/com/ruoyi/wcs/application/task/TransportOrderApplicationServiceTest.java b/ruoyi-wcs/src/test/java/com/ruoyi/wcs/application/task/TransportOrderApplicationServiceTest.java
new file mode 100644
index 0000000..26a4e01
--- /dev/null
+++ b/ruoyi-wcs/src/test/java/com/ruoyi/wcs/application/task/TransportOrderApplicationServiceTest.java
@@ -0,0 +1,161 @@
+package com.ruoyi.wcs.application.task;
+
+import com.ruoyi.wcs.domain.shared.DomainEvent;
+import com.ruoyi.wcs.domain.shared.IdGenerator;
+import com.ruoyi.wcs.domain.shared.WcsClock;
+import com.ruoyi.wcs.domain.task.TaskStepType;
+import com.ruoyi.wcs.domain.task.TransportOrder;
+import com.ruoyi.wcs.domain.task.TransportOrderState;
+import com.ruoyi.wcs.domain.task.TransportOrderType;
+import com.ruoyi.wcs.domain.task.WorkflowDefinition;
+import com.ruoyi.wcs.domain.task.WorkflowInstance;
+import com.ruoyi.wcs.domain.task.WorkflowStepDefinition;
+import com.ruoyi.wcs.port.out.DomainEventPublisher;
+import com.ruoyi.wcs.port.out.TransportOrderRepository;
+import com.ruoyi.wcs.port.out.WorkflowDefinitionProvider;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.time.Instant;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class TransportOrderApplicationServiceTest {
+    private InMemoryRepository repository;
+    private RecordingPublisher publisher;
+    private TransportOrderApplicationService service;
+
+    @BeforeEach
+    void setUp() {
+        repository = new InMemoryRepository();
+        publisher = new RecordingPublisher();
+        service = new TransportOrderApplicationService(
+                repository,
+                new SingleStepDefinitions(),
+                publisher,
+                new SequenceIdGenerator(),
+                new FixedClock());
+    }
+
+    @Test
+    void returnsTheExistingOrderForTheSameExternalRequest() {
+        TransportOrderResult first = service.create(command("REQ-1"));
+        TransportOrderResult second = service.create(command("REQ-1"));
+
+        assertEquals(first.getOrderId(), second.getOrderId());
+        assertEquals(1, repository.count());
+        assertEquals(2, publisher.events.size());
+    }
+
+    @Test
+    void createsAPlannedOrderAndItsWorkflowAtomically() {
+        TransportOrderResult result = service.create(command("REQ-2"));
+
+        assertEquals(TransportOrderState.PLANNED, result.getState());
+        assertEquals("PORT-1", result.getSourceCode());
+        assertEquals("SPACE-9", result.getDestinationCode());
+        assertEquals(1, repository.workflows.size());
+        assertEquals("OrderAccepted", publisher.events.get(0).getType());
+        assertEquals("OrderPlanned", publisher.events.get(1).getType());
+    }
+
+    @Test
+    void cancelBeforeExecutionProducesOneCancelledTransition() {
+        service.create(command("REQ-3"));
+
+        TransportOrderResult cancelled = service.cancel("REQ-3");
+
+        assertEquals(TransportOrderState.CANCELLED, cancelled.getState());
+        assertEquals("OrderCancelled", publisher.events.get(2).getType());
+    }
+
+    private CreateTransportOrderCommand command(String requestId) {
+        return new CreateTransportOrderCommand(
+                requestId,
+                TransportOrderType.INBOUND,
+                "LOAD-1",
+                "PORT-1",
+                "SPACE-9",
+                50,
+                null,
+                Collections.<String, String>emptyMap());
+    }
+
+    private static final class FixedClock implements WcsClock {
+        @Override
+        public Instant now() {
+            return Instant.parse("2026-08-04T00:00:00Z");
+        }
+    }
+
+    private static final class SequenceIdGenerator implements IdGenerator {
+        private int next = 1;
+
+        @Override
+        public String nextId() {
+            return "ID-" + next++;
+        }
+    }
+
+    private static final class SingleStepDefinitions implements WorkflowDefinitionProvider {
+        @Override
+        public WorkflowDefinition definitionFor(TransportOrderType orderType) {
+            return new WorkflowDefinition(orderType, Collections.singletonList(
+                    new WorkflowStepDefinition("MOVE", TaskStepType.MOVE,
+                            true, true, Collections.<String>emptyList())));
+        }
+    }
+
+    private static final class RecordingPublisher implements DomainEventPublisher {
+        private final List<DomainEvent> events = new ArrayList<DomainEvent>();
+
+        @Override
+        public void publish(List<DomainEvent> domainEvents) {
+            events.addAll(domainEvents);
+        }
+    }
+
+    private static final class InMemoryRepository implements TransportOrderRepository {
+        private final Map<String, TransportOrder> orders =
+                new LinkedHashMap<String, TransportOrder>();
+        private final Map<String, WorkflowInstance> workflows =
+                new LinkedHashMap<String, WorkflowInstance>();
+
+        @Override
+        public TransportOrder findByExternalRequestId(String externalRequestId) {
+            return orders.get(externalRequestId);
+        }
+
+        @Override
+        public TransportOrder findByOrderId(String orderId) {
+            for (TransportOrder order : orders.values()) {
+                if (order.getOrderId().equals(orderId)) {
+                    return order;
+                }
+            }
+            return null;
+        }
+
+        @Override
+        public void save(TransportOrder order, WorkflowInstance workflow) {
+            orders.put(order.getExternalRequestId(), order);
+            if (workflow != null) {
+                workflows.put(workflow.getWorkflowId(), workflow);
+            }
+        }
+
+        @Override
+        public void save(TransportOrder order) {
+            orders.put(order.getExternalRequestId(), order);
+        }
+
+        int count() {
+            return orders.size();
+        }
+    }
+}