diff --git a/src/LegacyFulfillment/Infrastructure/AntiCorruption/LegacyCreateShipmentCommand.php b/src/LegacyFulfillment/Infrastructure/AntiCorruption/LegacyCreateShipmentCommand.php
new file mode 100644
index 0000000..dd01366
--- /dev/null
+++ b/src/LegacyFulfillment/Infrastructure/AntiCorruption/LegacyCreateShipmentCommand.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\LegacyFulfillment\Infrastructure\AntiCorruption;
+
+/**
+ * Modele legacy : champs abreges et codifications imposees par le systeme d'expedition historique.
+ * Ce format ne doit jamais fuiter en dehors de l'ACL.
+ */
+final readonly class LegacyCreateShipmentCommand
+{
+    public function __construct(
+        public string $ord_ref,      // reference commande (format legacy: prefixe LEG-)
+        public string $rcpt_nm,      // nom destinataire (tronque a 35 chars)
+        public string $rcpt_addr,    // adresse sur une ligne
+        public string $rcpt_zip,     // code postal
+        public string $rcpt_cty,     // code pays ISO 2
+        public int $wgt_g,           // poids en grammes
+        public string $desc,         // description colis
+        public string $req_dt,       // date demande format legacy YYYYMMDD
+        public string $sts,          // statut: NEW, DIS (dispatched)
+    ) {}
+}
diff --git a/src/LegacyFulfillment/Infrastructure/AntiCorruption/LegacyShipmentAcl.php b/src/LegacyFulfillment/Infrastructure/AntiCorruption/LegacyShipmentAcl.php
new file mode 100644
index 0000000..140bcc9
--- /dev/null
+++ b/src/LegacyFulfillment/Infrastructure/AntiCorruption/LegacyShipmentAcl.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\LegacyFulfillment\Infrastructure\AntiCorruption;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed;
+
+/**
+ * Anti-Corruption Layer : traduit le Published Language sales.v1 vers le modele
+ * legacy d'expedition. Isole toutes les bizarreries du format legacy.
+ *
+ * @see §13.2 du boilerplate spec
+ */
+final class LegacyShipmentAcl
+{
+    private const int MAX_RECIPIENT_LENGTH = 35;
+
+    public function fromSalesOrderConfirmed(OrderConfirmed $message): LegacyCreateShipmentCommand
+    {
+        $recipientName = mb_substr('Customer ' . $message->customerId, 0, self::MAX_RECIPIENT_LENGTH);
+
+        $totalWeight = max(100, count($message->lines) * 500);
+
+        $description = sprintf(
+            'CMD-%s/%d articles',
+            mb_substr($message->orderId, 0, 8),
+            count($message->lines),
+        );
+
+        return new LegacyCreateShipmentCommand(
+            ord_ref: 'LEG-' . $message->orderId,
+            rcpt_nm: $recipientName,
+            rcpt_addr: 'N/A',
+            rcpt_zip: '00000',
+            rcpt_cty: 'FR',
+            wgt_g: $totalWeight,
+            desc: $description,
+            req_dt: date('Ymd'),
+            sts: 'NEW',
+        );
+    }
+}
diff --git a/src/LegacyFulfillment/Interfaces/Messaging/WhenOrderConfirmed.php b/src/LegacyFulfillment/Interfaces/Messaging/WhenOrderConfirmed.php
new file mode 100644
index 0000000..5ecaf0a
--- /dev/null
+++ b/src/LegacyFulfillment/Interfaces/Messaging/WhenOrderConfirmed.php
@@ -0,0 +1,40 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\LegacyFulfillment\Interfaces\Messaging;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed;
+use MiniShop\LegacyFulfillment\Application\Command\RequestShipmentFromSalesOrder;
+use MiniShop\LegacyFulfillment\Application\Command\RequestShipmentFromSalesOrderHandler;
+use MiniShop\LegacyFulfillment\Infrastructure\AntiCorruption\LegacyShipmentAcl;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+/**
+ * Consumer ACL : recoit sales.v1.OrderConfirmed, passe par l'Anti-Corruption Layer
+ * pour traduire vers le modele legacy, puis delegue au handler applicatif.
+ */
+#[AsMessageHandler]
+final readonly class WhenOrderConfirmed
+{
+    public function __construct(
+        private LegacyShipmentAcl $acl,
+        private RequestShipmentFromSalesOrderHandler $handler,
+    ) {}
+
+    public function __invoke(OrderConfirmed $message): void
+    {
+        $legacyCommand = $this->acl->fromSalesOrderConfirmed($message);
+
+        ($this->handler)(new RequestShipmentFromSalesOrder(
+            externalOrderId: $message->orderId,
+            recipientName: $legacyCommand->rcpt_nm,
+            street: $legacyCommand->rcpt_addr,
+            city: 'N/A',
+            postalCode: $legacyCommand->rcpt_zip,
+            country: $legacyCommand->rcpt_cty,
+            totalWeightInGrams: $legacyCommand->wgt_g,
+            description: $legacyCommand->desc,
+        ));
+    }
+}
diff --git a/tests/Integration/LegacyFulfillmentAclTest.php b/tests/Integration/LegacyFulfillmentAclTest.php
new file mode 100644
index 0000000..015892f
--- /dev/null
+++ b/tests/Integration/LegacyFulfillmentAclTest.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Tests\Integration;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed;
+use MiniShop\LegacyFulfillment\Application\Command\RequestShipmentFromSalesOrderHandler;
+use MiniShop\LegacyFulfillment\Domain\Model\LegacyOrderRef;
+use MiniShop\LegacyFulfillment\Infrastructure\AntiCorruption\LegacyShipmentAcl;
+use MiniShop\LegacyFulfillment\Infrastructure\Gateway\FakeLegacyFulfillmentGateway;
+use MiniShop\LegacyFulfillment\Infrastructure\Persistence\InMemoryShipmentRequestRepository;
+use MiniShop\LegacyFulfillment\Interfaces\Messaging\WhenOrderConfirmed;
+use MiniShop\Shared\Technical\SystemClock;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Test d'integration : le consumer ACL de LegacyFulfillment recoit un message
+ * sales.v1.OrderConfirmed, le traduit via l'ACL, et cree une demande d'expedition.
+ */
+final class LegacyFulfillmentAclTest extends TestCase
+{
+    public function test_acl_consumer_creates_shipment_from_contract(): void
+    {
+        $shipmentRepo = new InMemoryShipmentRequestRepository();
+        $gateway = new FakeLegacyFulfillmentGateway();
+
+        $consumer = new WhenOrderConfirmed(
+            new LegacyShipmentAcl(),
+            new RequestShipmentFromSalesOrderHandler($shipmentRepo, $gateway, new SystemClock()),
+        );
+
+        $consumer(new OrderConfirmed(
+            orderId: 'order-acl-int-001',
+            customerId: 'cust-001',
+            totalInCents: 3000,
+            currency: 'EUR',
+            lines: [
+                ['productName' => 'Widget', 'quantity' => 2, 'unitPriceInCents' => 1500, 'currency' => 'EUR'],
+            ],
+        ));
+
+        $shipment = $shipmentRepo->findByOrderRef(LegacyOrderRef::fromExternalId('order-acl-int-001'));
+        self::assertNotNull($shipment, 'ACL consumer must create a shipment request.');
+        self::assertCount(1, $gateway->sentRequests());
+    }
+}
diff --git a/tests/Unit/LegacyFulfillment/Infrastructure/AntiCorruption/LegacyShipmentAclTest.php b/tests/Unit/LegacyFulfillment/Infrastructure/AntiCorruption/LegacyShipmentAclTest.php
new file mode 100644
index 0000000..975ab56
--- /dev/null
+++ b/tests/Unit/LegacyFulfillment/Infrastructure/AntiCorruption/LegacyShipmentAclTest.php
@@ -0,0 +1,99 @@
+<?php
+
+declare(strict_types=1);
+
+namespace MiniShop\Tests\Unit\LegacyFulfillment\Infrastructure\AntiCorruption;
+
+use MiniShop\Contracts\Sales\V1\Event\OrderConfirmed;
+use MiniShop\LegacyFulfillment\Infrastructure\AntiCorruption\LegacyShipmentAcl;
+use PHPUnit\Framework\TestCase;
+
+/**
+ * Tests du mapping ACL : sales.v1.OrderConfirmed → LegacyCreateShipmentCommand.
+ */
+final class LegacyShipmentAclTest extends TestCase
+{
+    private LegacyShipmentAcl $acl;
+
+    protected function setUp(): void
+    {
+        $this->acl = new LegacyShipmentAcl();
+    }
+
+    public function test_maps_order_ref_with_legacy_prefix(): void
+    {
+        $command = $this->acl->fromSalesOrderConfirmed($this->createMessage());
+
+        self::assertStringStartsWith('LEG-', $command->ord_ref);
+        self::assertSame('LEG-order-acl-001', $command->ord_ref);
+    }
+
+    public function test_truncates_recipient_name(): void
+    {
+        $message = new OrderConfirmed(
+            orderId: 'order-001',
+            customerId: 'very-long-customer-id-that-exceeds-thirty-five-characters-limit',
+            totalInCents: 1000,
+            currency: 'EUR',
+            lines: [['productName' => 'X', 'quantity' => 1, 'unitPriceInCents' => 1000, 'currency' => 'EUR']],
+        );
+
+        $command = $this->acl->fromSalesOrderConfirmed($message);
+
+        self::assertLessThanOrEqual(35, mb_strlen($command->rcpt_nm));
+    }
+
+    public function test_calculates_weight_from_line_count(): void
+    {
+        $command = $this->acl->fromSalesOrderConfirmed($this->createMessage(lineCount: 3));
+
+        self::assertSame(1500, $command->wgt_g); // 3 * 500g
+    }
+
+    public function test_minimum_weight_is_100g(): void
+    {
+        $command = $this->acl->fromSalesOrderConfirmed($this->createMessage(lineCount: 0));
+
+        self::assertGreaterThanOrEqual(100, $command->wgt_g);
+    }
+
+    public function test_status_is_new(): void
+    {
+        $command = $this->acl->fromSalesOrderConfirmed($this->createMessage());
+
+        self::assertSame('NEW', $command->sts);
+    }
+
+    public function test_date_format_is_legacy_yyyymmdd(): void
+    {
+        $command = $this->acl->fromSalesOrderConfirmed($this->createMessage());
+
+        self::assertMatchesRegularExpression('/^\d{8}$/', $command->req_dt);
+    }
+
+    public function test_description_contains_order_ref_and_article_count(): void
+    {
+        $command = $this->acl->fromSalesOrderConfirmed($this->createMessage(lineCount: 2));
+
+        self::assertStringContainsString('CMD-', $command->desc);
+        self::assertStringContainsString('2 articles', $command->desc);
+    }
+
+    private function createMessage(int $lineCount = 1): OrderConfirmed
+    {
+        $lines = array_fill(0, $lineCount, [
+            'productName' => 'Widget',
+            'quantity' => 1,
+            'unitPriceInCents' => 1000,
+            'currency' => 'EUR',
+        ]);
+
+        return new OrderConfirmed(
+            orderId: 'order-acl-001',
+            customerId: 'cust-001',
+            totalInCents: $lineCount * 1000,
+            currency: 'EUR',
+            lines: $lines,
+        );
+    }
+}