diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
index 1be2d39..5b7387b 100644
--- a/.php-cs-fixer.php
+++ b/.php-cs-fixer.php
@@ -14,6 +14,7 @@ return (new PhpCsFixer\Config())
         'no_unused_imports' => true,
         'array_syntax' => ['syntax' => 'short'],
         'phpdoc_align' => false,
+        'phpdoc_to_comment' => false,
     ])
     ->setRiskyAllowed(true)
     ->setFinder($finder);
diff --git a/config/routes/api.yaml b/config/routes/api.yaml
new file mode 100644
index 0000000..e09c54d
--- /dev/null
+++ b/config/routes/api.yaml
@@ -0,0 +1,4 @@
+api:
+    resource: '../src/Infrastructure/Http/Controller/Api/'
+    type: attribute
+    prefix: /api
diff --git a/config/services.yaml b/config/services.yaml
index 0b54e56..1568a8b 100644
--- a/config/services.yaml
+++ b/config/services.yaml
@@ -25,3 +25,24 @@ services:
 
     App\Domain\Order\Repository\OrderRepositoryInterface:
         alias: App\Infrastructure\Persistence\Repository\DoctrineOrderRepository
+
+    App\Domain\Storage\Repository\StoragePathRepositoryInterface:
+        alias: App\Infrastructure\Persistence\Repository\DoctrineStoragePathRepository
+
+    App\Domain\Article\Repository\ArticlePhotoRepositoryInterface:
+        alias: App\Infrastructure\Persistence\Repository\DoctrineArticlePhotoRepository
+
+    App\Domain\Article\Repository\AttributeValueRepositoryInterface:
+        alias: App\Infrastructure\Persistence\Repository\DoctrineAttributeValueRepository
+
+    App\Domain\Channel\Repository\ChannelFieldRepositoryInterface:
+        alias: App\Infrastructure\Persistence\Repository\DoctrineChannelFieldRepository
+
+    App\Domain\Channel\Repository\ArticleTypePlatformConfigRepositoryInterface:
+        alias: App\Infrastructure\Persistence\Repository\DoctrineArticleTypePlatformConfigRepository
+
+    App\Domain\Channel\Repository\AttributeMappingRepositoryInterface:
+        alias: App\Infrastructure\Persistence\Repository\DoctrineAttributeMappingRepository
+
+    App\Application\Storage\StorageManagerInterface:
+        alias: App\Infrastructure\Storage\LocalStorageManager
diff --git a/migrations/Version20260514050204.php b/migrations/Version20260514050204.php
new file mode 100644
index 0000000..05e8ea8
--- /dev/null
+++ b/migrations/Version20260514050204.php
@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260514050204 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Add inventory_number sequence';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql('CREATE SEQUENCE IF NOT EXISTS app.inventory_seq START 1 INCREMENT 1');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP SEQUENCE IF EXISTS app.inventory_seq');
+    }
+}
diff --git a/phpstan.neon b/phpstan.neon
index c63c22e..7c4c802 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,7 +1,3 @@
-includes:
-    - vendor/phpstan/phpstan-symfony/extension.neon
-    - vendor/phpstan/phpstan-doctrine/extension.neon
-
 parameters:
     level: 9
     paths:
@@ -9,5 +5,3 @@ parameters:
         - tests
     symfony:
         containerXmlPath: var/cache/dev/App_KernelDevDebugContainer.xml
-    doctrine:
-        objectManagerLoader: tests/bootstrap.php
diff --git a/src/Application/Article/ArticleService.php b/src/Application/Article/ArticleService.php
new file mode 100644
index 0000000..8240789
--- /dev/null
+++ b/src/Application/Article/ArticleService.php
@@ -0,0 +1,139 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Application\Article;
+
+use App\Domain\Article\Article;
+use App\Domain\Article\ArticleCondition;
+use App\Domain\Article\ArticleStatus;
+use App\Domain\Article\AttributeValue;
+use App\Domain\Article\Repository\ArticleRepositoryInterface;
+use App\Domain\Article\Repository\ArticleTypeRepositoryInterface;
+use Doctrine\DBAL\Connection;
+use Symfony\Component\Uid\Uuid;
+
+final class ArticleService
+{
+    public function __construct(
+        private readonly ArticleRepositoryInterface $articleRepository,
+        private readonly ArticleTypeRepositoryInterface $articleTypeRepository,
+        private readonly ArticleValidator $validator,
+        private readonly Connection $connection,
+    ) {
+    }
+
+    public function create(
+        Uuid $articleTypeId,
+        ArticleCondition $condition,
+        int $stock = 1,
+        ?string $conditionNotes = null,
+    ): Article {
+        $articleType = $this->articleTypeRepository->findById($articleTypeId)
+            ?? throw new \DomainException("ArticleType {$articleTypeId->toRfc4122()} not found");
+
+        $inventoryNumber = $this->nextInventoryNumber();
+        $sku = 'ART-'.mb_strtoupper(substr(str_replace('-', '', Uuid::v7()->toRfc4122()), 0, 8));
+
+        $article = new Article($articleType, $sku, $inventoryNumber, $stock, $condition);
+        $article->setConditionNotes($conditionNotes);
+        $this->articleRepository->save($article);
+
+        return $article;
+    }
+
+    public function findById(Uuid $id): ?Article
+    {
+        return $this->articleRepository->findById($id);
+    }
+
+    /** @return list<Article> */
+    public function findByStatus(ArticleStatus $status): array
+    {
+        return $this->articleRepository->findByStatus($status);
+    }
+
+    /**
+     * @param array<string, string> $values attribute_definition_id => value
+     */
+    public function updateAttributes(Uuid $articleId, array $values): Article
+    {
+        $article = $this->articleRepository->findById($articleId)
+            ?? throw new \DomainException("Article {$articleId->toRfc4122()} not found");
+
+        $articleType = $article->getArticleType();
+
+        foreach ($values as $defIdStr => $value) {
+            $defId = Uuid::fromString($defIdStr);
+            $def = null;
+            foreach ($articleType->getAttributeDefinitions() as $d) {
+                if ($d->getId()->equals($defId)) {
+                    $def = $d;
+                    break;
+                }
+            }
+
+            if (null === $def) {
+                throw new \DomainException("AttributeDefinition {$defIdStr} not linked to this ArticleType");
+            }
+
+            $article->setAttributeValue(new AttributeValue($article, $def, $value));
+        }
+
+        $this->articleRepository->save($article);
+
+        return $article;
+    }
+
+    public function setListingPrice(Uuid $articleId, ?string $price): Article
+    {
+        $article = $this->articleRepository->findById($articleId)
+            ?? throw new \DomainException("Article {$articleId->toRfc4122()} not found");
+
+        $article->setListingPrice($price);
+        $this->articleRepository->save($article);
+
+        return $article;
+    }
+
+    public function setEbayTexts(Uuid $articleId, ?string $title, ?string $description): Article
+    {
+        $article = $this->articleRepository->findById($articleId)
+            ?? throw new \DomainException("Article {$articleId->toRfc4122()} not found");
+
+        $article->setEbayTitle($title);
+        $article->setEbayDescription($description);
+        $this->articleRepository->save($article);
+
+        return $article;
+    }
+
+    /**
+     * Validates all required attributes are set, then transitions draft → active.
+     *
+     * @return array{article: Article, missing: list<string>}
+     */
+    public function activate(Uuid $articleId): array
+    {
+        $article = $this->articleRepository->findById($articleId)
+            ?? throw new \DomainException("Article {$articleId->toRfc4122()} not found");
+
+        $missing = $this->validator->getMissingAttributes($article);
+        if ([] !== $missing) {
+            return ['article' => $article, 'missing' => $missing];
+        }
+
+        $article->transitionTo(ArticleStatus::Active);
+        $this->articleRepository->save($article);
+
+        return ['article' => $article, 'missing' => []];
+    }
+
+    private function nextInventoryNumber(): string
+    {
+        /** @var string $seq */
+        $seq = $this->connection->fetchOne("SELECT nextval('app.inventory_seq')");
+
+        return \sprintf('INV-%s-%05d', date('Y'), (int) $seq);
+    }
+}
diff --git a/src/Application/Article/ArticleTypeService.php b/src/Application/Article/ArticleTypeService.php
new file mode 100644
index 0000000..50ad1bb
--- /dev/null
+++ b/src/Application/Article/ArticleTypeService.php
@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Application\Article;
+
+use App\Domain\Article\ArticleType;
+use App\Domain\Article\AttributeDefinition;
+use App\Domain\Article\AttributeType;
+use App\Domain\Article\Repository\ArticleTypeRepositoryInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class ArticleTypeService
+{
+    public function __construct(
+        private readonly ArticleTypeRepositoryInterface $articleTypeRepository,
+    ) {
+    }
+
+    public function create(string $name): ArticleType
+    {
+        $type = new ArticleType($name);
+        $this->articleTypeRepository->save($type);
+
+        return $type;
+    }
+
+    /** @return list<ArticleType> */
+    public function findAll(): array
+    {
+        return $this->articleTypeRepository->findAll();
+    }
+
+    public function findById(Uuid $id): ?ArticleType
+    {
+        return $this->articleTypeRepository->findById($id);
+    }
+
+    public function rename(Uuid $id, string $newName): ArticleType
+    {
+        $type = $this->articleTypeRepository->findById($id)
+            ?? throw new \DomainException("ArticleType {$id->toRfc4122()} not found");
+
+        $type->setName($newName);
+        $this->articleTypeRepository->save($type);
+
+        return $type;
+    }
+
+    /** @param list<string>|null $options */
+    public function createAttribute(string $name, AttributeType $type, ?string $unit = null, ?array $options = null): AttributeDefinition
+    {
+        $def = new AttributeDefinition($name, $type);
+        $def->setUnit($unit);
+        $def->setOptions($options);
+
+        return $def;
+    }
+
+    public function addAttribute(Uuid $articleTypeId, AttributeDefinition $def): ArticleType
+    {
+        $type = $this->articleTypeRepository->findById($articleTypeId)
+            ?? throw new \DomainException("ArticleType {$articleTypeId->toRfc4122()} not found");
+
+        $type->addAttributeDefinition($def);
+        $this->articleTypeRepository->save($type);
+
+        return $type;
+    }
+
+    public function removeAttribute(Uuid $articleTypeId, Uuid $definitionId): void
+    {
+        $type = $this->articleTypeRepository->findById($articleTypeId)
+            ?? throw new \DomainException("ArticleType {$articleTypeId->toRfc4122()} not found");
+
+        foreach ($type->getAttributeDefinitions() as $def) {
+            if ($def->getId()->equals($definitionId)) {
+                $type->removeAttributeDefinition($def);
+                break;
+            }
+        }
+
+        $this->articleTypeRepository->save($type);
+    }
+}
diff --git a/src/Application/Article/ArticleValidator.php b/src/Application/Article/ArticleValidator.php
new file mode 100644
index 0000000..81433b9
--- /dev/null
+++ b/src/Application/Article/ArticleValidator.php
@@ -0,0 +1,33 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Application\Article;
+
+use App\Domain\Article\Article;
+
+final class ArticleValidator
+{
+    /** @return list<string> missing attribute names */
+    public function getMissingAttributes(Article $article): array
+    {
+        $setValue = [];
+        foreach ($article->getAttributeValues() as $value) {
+            $setValue[] = $value->getAttributeDefinition()->getId()->toRfc4122();
+        }
+
+        $missing = [];
+        foreach ($article->getArticleType()->getAttributeDefinitions() as $def) {
+            if (!\in_array($def->getId()->toRfc4122(), $setValue, strict: true)) {
+                $missing[] = $def->getName();
+            }
+        }
+
+        return $missing;
+    }
+
+    public function isValid(Article $article): bool
+    {
+        return [] === $this->getMissingAttributes($article);
+    }
+}
diff --git a/src/Application/Article/PhotoService.php b/src/Application/Article/PhotoService.php
new file mode 100644
index 0000000..74ba6b6
--- /dev/null
+++ b/src/Application/Article/PhotoService.php
@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Application\Article;
+
+use App\Application\Storage\StorageManagerInterface;
+use App\Domain\Article\ArticlePhoto;
+use App\Domain\Article\Repository\ArticlePhotoRepositoryInterface;
+use App\Domain\Article\Repository\ArticleRepositoryInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class PhotoService
+{
+    public function __construct(
+        private readonly ArticleRepositoryInterface $articleRepository,
+        private readonly ArticlePhotoRepositoryInterface $photoRepository,
+        private readonly StorageManagerInterface $storageManager,
+    ) {
+    }
+
+    public function upload(Uuid $articleId, string $tempPath, string $originalFilename): ArticlePhoto
+    {
+        $article = $this->articleRepository->findById($articleId)
+            ?? throw new \DomainException("Article {$articleId->toRfc4122()} not found");
+
+        $stored = $this->storageManager->store($tempPath, $originalFilename);
+
+        $existingPhotos = $this->photoRepository->findByArticle($articleId);
+        $isMain = 0 === \count($existingPhotos);
+        $sortOrder = \count($existingPhotos);
+
+        $photo = new ArticlePhoto($article, $stored->storagePath, $stored->filename, $isMain, $sortOrder);
+
+        $this->photoRepository->save($photo);
+
+        return $photo;
+    }
+
+    public function setMain(Uuid $photoId): void
+    {
+        $photo = $this->photoRepository->findById($photoId)
+            ?? throw new \DomainException("Photo {$photoId->toRfc4122()} not found");
+
+        $allPhotos = $this->photoRepository->findByArticle($photo->getArticle()->getId());
+        foreach ($allPhotos as $p) {
+            $p->setIsMain($p->getId()->equals($photoId));
+            $this->photoRepository->save($p);
+        }
+    }
+
+    public function delete(Uuid $photoId): void
+    {
+        $photo = $this->photoRepository->findById($photoId)
+            ?? throw new \DomainException("Photo {$photoId->toRfc4122()} not found");
+
+        $fullPath = $this->storageManager->getFullPath($photo->getStoragePath(), $photo->getFilename());
+        if (file_exists($fullPath)) {
+            unlink($fullPath);
+        }
+
+        if ($photo->isMain()) {
+            $articleId = $photo->getArticle()->getId();
+            $this->photoRepository->remove($photo);
+            $remaining = $this->photoRepository->findByArticle($articleId);
+            if ([] !== $remaining) {
+                $remaining[0]->setIsMain(true);
+                $this->photoRepository->save($remaining[0]);
+            }
+        } else {
+            $this->photoRepository->remove($photo);
+        }
+    }
+}
diff --git a/src/Application/Channel/MappingService.php b/src/Application/Channel/MappingService.php
new file mode 100644
index 0000000..48c3956
--- /dev/null
+++ b/src/Application/Channel/MappingService.php
@@ -0,0 +1,86 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Application\Channel;
+
+use App\Domain\Article\Repository\ArticleTypeRepositoryInterface;
+use App\Domain\Channel\ArticleTypePlatformConfig;
+use App\Domain\Channel\AttributeMapping;
+use App\Domain\Channel\Repository\ArticleTypePlatformConfigRepositoryInterface;
+use App\Domain\Channel\Repository\AttributeMappingRepositoryInterface;
+use App\Domain\Channel\Repository\ChannelFieldRepositoryInterface;
+use App\Domain\Channel\Repository\PlatformRepositoryInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class MappingService
+{
+    public function __construct(
+        private readonly ArticleTypeRepositoryInterface $articleTypeRepository,
+        private readonly PlatformRepositoryInterface $platformRepository,
+        private readonly ArticleTypePlatformConfigRepositoryInterface $configRepository,
+        private readonly AttributeMappingRepositoryInterface $mappingRepository,
+        private readonly ChannelFieldRepositoryInterface $channelFieldRepository,
+    ) {
+    }
+
+    public function createConfig(Uuid $articleTypeId, Uuid $platformId, string $categoryId): ArticleTypePlatformConfig
+    {
+        $articleType = $this->articleTypeRepository->findById($articleTypeId)
+            ?? throw new \DomainException("ArticleType {$articleTypeId->toRfc4122()} not found");
+
+        $platform = $this->platformRepository->findById($platformId)
+            ?? throw new \DomainException("Platform {$platformId->toRfc4122()} not found");
+
+        $existing = $this->configRepository->findByArticleTypeAndPlatform($articleTypeId, $platformId);
+        if (null !== $existing) {
+            throw new \DomainException('Config for this ArticleType+Platform combination already exists');
+        }
+
+        $config = new ArticleTypePlatformConfig($articleType, $platform, $categoryId);
+        $this->configRepository->save($config);
+
+        return $config;
+    }
+
+    /** @return list<ArticleTypePlatformConfig> */
+    public function findConfigsByArticleType(Uuid $articleTypeId): array
+    {
+        return $this->configRepository->findByArticleType($articleTypeId);
+    }
+
+    public function addMapping(Uuid $configId, Uuid $attributeDefinitionId, Uuid $channelFieldId, ?string $transformer = null): AttributeMapping
+    {
+        $config = $this->configRepository->findById($configId)
+            ?? throw new \DomainException("Config {$configId->toRfc4122()} not found");
+
+        $articleType = $config->getArticleType();
+        $attributeDefinition = null;
+        foreach ($articleType->getAttributeDefinitions() as $def) {
+            if ($def->getId()->equals($attributeDefinitionId)) {
+                $attributeDefinition = $def;
+                break;
+            }
+        }
+        if (null === $attributeDefinition) {
+            throw new \DomainException("AttributeDefinition {$attributeDefinitionId->toRfc4122()} not linked to this ArticleType");
+        }
+
+        $channelField = $this->channelFieldRepository->findById($channelFieldId)
+            ?? throw new \DomainException("ChannelField {$channelFieldId->toRfc4122()} not found");
+
+        $mapping = new AttributeMapping($config, $attributeDefinition, $channelField);
+        $mapping->setTransformer($transformer);
+        $this->mappingRepository->save($mapping);
+
+        return $mapping;
+    }
+
+    public function removeMapping(Uuid $mappingId): void
+    {
+        $mapping = $this->mappingRepository->findById($mappingId)
+            ?? throw new \DomainException("Mapping {$mappingId->toRfc4122()} not found");
+
+        $this->mappingRepository->remove($mapping);
+    }
+}
diff --git a/src/Application/Channel/PlatformService.php b/src/Application/Channel/PlatformService.php
new file mode 100644
index 0000000..6263b05
--- /dev/null
+++ b/src/Application/Channel/PlatformService.php
@@ -0,0 +1,68 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Application\Channel;
+
+use App\Domain\Channel\ChannelField;
+use App\Domain\Channel\Platform;
+use App\Domain\Channel\Repository\ChannelFieldRepositoryInterface;
+use App\Domain\Channel\Repository\PlatformRepositoryInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class PlatformService
+{
+    public function __construct(
+        private readonly PlatformRepositoryInterface $platformRepository,
+        private readonly ChannelFieldRepositoryInterface $channelFieldRepository,
+    ) {
+    }
+
+    /** @param array<string, mixed> $config */
+    public function create(string $type, string $label, array $config = []): Platform
+    {
+        $platform = new Platform($type, $label);
+        if ([] !== $config) {
+            $platform->setConfig($config);
+        }
+        $this->platformRepository->save($platform);
+
+        return $platform;
+    }
+
+    /** @return list<Platform> */
+    public function findAll(): array
+    {
+        return $this->platformRepository->findAll();
+    }
+
+    public function findById(Uuid $id): ?Platform
+    {
+        return $this->platformRepository->findById($id);
+    }
+
+    public function addChannelField(Uuid $platformId, string $label, string $path): ChannelField
+    {
+        $platform = $this->platformRepository->findById($platformId)
+            ?? throw new \DomainException("Platform {$platformId->toRfc4122()} not found");
+
+        $field = new ChannelField($platform, $label, $path);
+        $this->channelFieldRepository->save($field);
+
+        return $field;
+    }
+
+    /** @return list<ChannelField> */
+    public function findChannelFields(Uuid $platformId): array
+    {
+        return $this->channelFieldRepository->findByPlatform($platformId);
+    }
+
+    public function removeChannelField(Uuid $fieldId): void
+    {
+        $field = $this->channelFieldRepository->findById($fieldId)
+            ?? throw new \DomainException("ChannelField {$fieldId->toRfc4122()} not found");
+
+        $this->channelFieldRepository->remove($field);
+    }
+}
diff --git a/src/Application/Storage/StorageManagerInterface.php b/src/Application/Storage/StorageManagerInterface.php
new file mode 100644
index 0000000..34d6d9e
--- /dev/null
+++ b/src/Application/Storage/StorageManagerInterface.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Application\Storage;
+
+use App\Domain\Storage\StoragePath;
+
+interface StorageManagerInterface
+{
+    /**
+     * Moves $tempPath into the best available StoragePath.
+     * $originalFilename is used for extension extraction only; actual filename is UUID-based.
+     *
+     * @throws \RuntimeException when no active storage path with quota available
+     */
+    public function store(string $tempPath, string $originalFilename): StoredFile;
+
+    public function getFullPath(StoragePath $storagePath, string $filename): string;
+}
diff --git a/src/Application/Storage/StoredFile.php b/src/Application/Storage/StoredFile.php
new file mode 100644
index 0000000..a0a22ca
--- /dev/null
+++ b/src/Application/Storage/StoredFile.php
@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Application\Storage;
+
+use App\Domain\Storage\StoragePath;
+
+final readonly class StoredFile
+{
+    public function __construct(
+        public StoragePath $storagePath,
+        public string $filename,
+    ) {
+    }
+}
diff --git a/src/Domain/Article/Article.php b/src/Domain/Article/Article.php
index e18c07c..ae1bc64 100644
--- a/src/Domain/Article/Article.php
+++ b/src/Domain/Article/Article.php
@@ -84,11 +84,7 @@ class Article
     public function transitionTo(ArticleStatus $newStatus): void
     {
         if (!$this->status->canTransitionTo($newStatus)) {
-            throw new \DomainException(\sprintf(
-                'Cannot transition from %s to %s',
-                $this->status->value,
-                $newStatus->value,
-            ));
+            throw new \DomainException(\sprintf('Cannot transition from %s to %s', $this->status->value, $newStatus->value));
         }
         $this->status = $newStatus;
     }
@@ -101,7 +97,10 @@ class Article
         --$this->stock;
     }
 
-    public function isOutOfStock(): bool { return 0 === $this->stock; }
+    public function isOutOfStock(): bool
+    {
+        return 0 === $this->stock;
+    }
 
     public function getMainPhoto(): ?ArticlePhoto
     {
@@ -114,30 +113,121 @@ class Article
         return null;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getArticleType(): ArticleType { return $this->articleType; }
-    public function getSku(): string { return $this->sku; }
-    public function getInventoryNumber(): string { return $this->inventoryNumber; }
-    public function getStatus(): ArticleStatus { return $this->status; }
-    public function getStock(): int { return $this->stock; }
-    public function getCondition(): ArticleCondition { return $this->condition; }
-    public function getConditionNotes(): ?string { return $this->conditionNotes; }
-    public function getListingPrice(): ?string { return $this->listingPrice; }
-    public function getSerialNumber(): ?string { return $this->serialNumber; }
-    public function getEbayListingId(): ?string { return $this->ebayListingId; }
-    public function getEbayTitle(): ?string { return $this->ebayTitle; }
-    public function getEbayDescription(): ?string { return $this->ebayDescription; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getArticleType(): ArticleType
+    {
+        return $this->articleType;
+    }
+
+    public function getSku(): string
+    {
+        return $this->sku;
+    }
+
+    public function getInventoryNumber(): string
+    {
+        return $this->inventoryNumber;
+    }
+
+    public function getStatus(): ArticleStatus
+    {
+        return $this->status;
+    }
+
+    public function getStock(): int
+    {
+        return $this->stock;
+    }
+
+    public function getCondition(): ArticleCondition
+    {
+        return $this->condition;
+    }
+
+    public function getConditionNotes(): ?string
+    {
+        return $this->conditionNotes;
+    }
+
+    public function getListingPrice(): ?string
+    {
+        return $this->listingPrice;
+    }
+
+    public function getSerialNumber(): ?string
+    {
+        return $this->serialNumber;
+    }
+
+    public function getEbayListingId(): ?string
+    {
+        return $this->ebayListingId;
+    }
+
+    public function getEbayTitle(): ?string
+    {
+        return $this->ebayTitle;
+    }
+
+    public function getEbayDescription(): ?string
+    {
+        return $this->ebayDescription;
+    }
+
+    public function setAttributeValue(AttributeValue $value): void
+    {
+        foreach ($this->attributeValues as $existing) {
+            if ($existing->getAttributeDefinition()->getId()->equals($value->getAttributeDefinition()->getId())) {
+                $this->attributeValues->removeElement($existing);
+                break;
+            }
+        }
+        $this->attributeValues->add($value);
+    }
 
     /** @return Collection<int, AttributeValue> */
-    public function getAttributeValues(): Collection { return $this->attributeValues; }
+    public function getAttributeValues(): Collection
+    {
+        return $this->attributeValues;
+    }
 
     /** @return Collection<int, ArticlePhoto> */
-    public function getPhotos(): Collection { return $this->photos; }
+    public function getPhotos(): Collection
+    {
+        return $this->photos;
+    }
 
-    public function setConditionNotes(?string $notes): void { $this->conditionNotes = $notes; }
-    public function setListingPrice(?string $price): void { $this->listingPrice = $price; }
-    public function setSerialNumber(?string $sn): void { $this->serialNumber = $sn; }
-    public function setEbayListingId(?string $id): void { $this->ebayListingId = $id; }
-    public function setEbayTitle(?string $title): void { $this->ebayTitle = $title; }
-    public function setEbayDescription(?string $desc): void { $this->ebayDescription = $desc; }
+    public function setConditionNotes(?string $notes): void
+    {
+        $this->conditionNotes = $notes;
+    }
+
+    public function setListingPrice(?string $price): void
+    {
+        $this->listingPrice = $price;
+    }
+
+    public function setSerialNumber(?string $sn): void
+    {
+        $this->serialNumber = $sn;
+    }
+
+    public function setEbayListingId(?string $id): void
+    {
+        $this->ebayListingId = $id;
+    }
+
+    public function setEbayTitle(?string $title): void
+    {
+        $this->ebayTitle = $title;
+    }
+
+    public function setEbayDescription(?string $desc): void
+    {
+        $this->ebayDescription = $desc;
+    }
 }
diff --git a/src/Domain/Article/ArticlePhoto.php b/src/Domain/Article/ArticlePhoto.php
index 38f814b..1502d31 100644
--- a/src/Domain/Article/ArticlePhoto.php
+++ b/src/Domain/Article/ArticlePhoto.php
@@ -37,8 +37,8 @@ class ArticlePhoto
         Article $article,
         StoragePath $storagePath,
         string $filename,
-        bool $isMain,
-        int $sortOrder,
+        bool $isMain = false,
+        int $sortOrder = 0,
     ) {
         $this->id = Uuid::v7();
         $this->article = $article;
@@ -48,12 +48,45 @@ class ArticlePhoto
         $this->sortOrder = $sortOrder;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getStoragePath(): StoragePath { return $this->storagePath; }
-    public function getFilename(): string { return $this->filename; }
-    public function isMain(): bool { return $this->isMain; }
-    public function getSortOrder(): int { return $this->sortOrder; }
-    public function setSortOrder(int $sortOrder): void { $this->sortOrder = $sortOrder; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getArticle(): Article
+    {
+        return $this->article;
+    }
+
+    public function getStoragePath(): StoragePath
+    {
+        return $this->storagePath;
+    }
+
+    public function setIsMain(bool $isMain): void
+    {
+        $this->isMain = $isMain;
+    }
+
+    public function getFilename(): string
+    {
+        return $this->filename;
+    }
+
+    public function isMain(): bool
+    {
+        return $this->isMain;
+    }
+
+    public function getSortOrder(): int
+    {
+        return $this->sortOrder;
+    }
+
+    public function setSortOrder(int $sortOrder): void
+    {
+        $this->sortOrder = $sortOrder;
+    }
 
     public function getFullPath(): string
     {
diff --git a/src/Domain/Article/ArticleType.php b/src/Domain/Article/ArticleType.php
index dbbe57f..a25fa99 100644
--- a/src/Domain/Article/ArticleType.php
+++ b/src/Domain/Article/ArticleType.php
@@ -32,12 +32,26 @@ class ArticleType
         $this->attributeDefinitions = new ArrayCollection();
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getName(): string { return $this->name; }
-    public function setName(string $name): void { $this->name = $name; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function setName(string $name): void
+    {
+        $this->name = $name;
+    }
 
     /** @return Collection<int, AttributeDefinition> */
-    public function getAttributeDefinitions(): Collection { return $this->attributeDefinitions; }
+    public function getAttributeDefinitions(): Collection
+    {
+        return $this->attributeDefinitions;
+    }
 
     public function addAttributeDefinition(AttributeDefinition $def): void
     {
diff --git a/src/Domain/Article/AttributeDefinition.php b/src/Domain/Article/AttributeDefinition.php
index 3f74345..7fc92c7 100644
--- a/src/Domain/Article/AttributeDefinition.php
+++ b/src/Domain/Article/AttributeDefinition.php
@@ -35,16 +35,45 @@ class AttributeDefinition
         $this->type = $type;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getName(): string { return $this->name; }
-    public function setName(string $name): void { $this->name = $name; }
-    public function getType(): AttributeType { return $this->type; }
-    public function getUnit(): ?string { return $this->unit; }
-    public function setUnit(?string $unit): void { $this->unit = $unit; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function setName(string $name): void
+    {
+        $this->name = $name;
+    }
+
+    public function getType(): AttributeType
+    {
+        return $this->type;
+    }
+
+    public function getUnit(): ?string
+    {
+        return $this->unit;
+    }
+
+    public function setUnit(?string $unit): void
+    {
+        $this->unit = $unit;
+    }
 
     /** @return list<string>|null */
-    public function getOptions(): ?array { return $this->options; }
+    public function getOptions(): ?array
+    {
+        return $this->options;
+    }
 
     /** @param list<string>|null $options */
-    public function setOptions(?array $options): void { $this->options = $options; }
+    public function setOptions(?array $options): void
+    {
+        $this->options = $options;
+    }
 }
diff --git a/src/Domain/Article/AttributeValue.php b/src/Domain/Article/AttributeValue.php
index 07b6eb5..5386983 100644
--- a/src/Domain/Article/AttributeValue.php
+++ b/src/Domain/Article/AttributeValue.php
@@ -38,10 +38,25 @@ class AttributeValue
         $this->value = $value;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getAttributeDefinition(): AttributeDefinition { return $this->attributeDefinition; }
-    public function getValue(): string { return $this->value; }
-    public function setValue(string $value): void { $this->value = $value; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getAttributeDefinition(): AttributeDefinition
+    {
+        return $this->attributeDefinition;
+    }
+
+    public function getValue(): string
+    {
+        return $this->value;
+    }
+
+    public function setValue(string $value): void
+    {
+        $this->value = $value;
+    }
 
     public function getCastValue(): mixed
     {
@@ -49,7 +64,7 @@ class AttributeValue
             AttributeType::Int => (int) $this->value,
             AttributeType::Float => (float) $this->value,
             AttributeType::Bool => filter_var($this->value, \FILTER_VALIDATE_BOOLEAN),
-            AttributeType::MultiSelect => \json_decode($this->value, true),
+            AttributeType::MultiSelect => json_decode($this->value, true),
             default => $this->value,
         };
     }
diff --git a/src/Domain/Article/Repository/ArticlePhotoRepositoryInterface.php b/src/Domain/Article/Repository/ArticlePhotoRepositoryInterface.php
new file mode 100644
index 0000000..496b12d
--- /dev/null
+++ b/src/Domain/Article/Repository/ArticlePhotoRepositoryInterface.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Domain\Article\Repository;
+
+use App\Domain\Article\ArticlePhoto;
+use Symfony\Component\Uid\Uuid;
+
+interface ArticlePhotoRepositoryInterface
+{
+    public function findById(Uuid $id): ?ArticlePhoto;
+
+    /** @return list<ArticlePhoto> */
+    public function findByArticle(Uuid $articleId): array;
+
+    public function save(ArticlePhoto $photo): void;
+
+    public function remove(ArticlePhoto $photo): void;
+}
diff --git a/src/Domain/Article/Repository/AttributeValueRepositoryInterface.php b/src/Domain/Article/Repository/AttributeValueRepositoryInterface.php
new file mode 100644
index 0000000..a95afbf
--- /dev/null
+++ b/src/Domain/Article/Repository/AttributeValueRepositoryInterface.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Domain\Article\Repository;
+
+use App\Domain\Article\AttributeValue;
+use Symfony\Component\Uid\Uuid;
+
+interface AttributeValueRepositoryInterface
+{
+    /** @return list<AttributeValue> */
+    public function findByArticle(Uuid $articleId): array;
+
+    public function findByArticleAndDefinition(Uuid $articleId, Uuid $definitionId): ?AttributeValue;
+
+    public function save(AttributeValue $value): void;
+
+    public function remove(AttributeValue $value): void;
+}
diff --git a/src/Domain/Auth/ApiKey.php b/src/Domain/Auth/ApiKey.php
index 0a6cd12..b7866c5 100644
--- a/src/Domain/Auth/ApiKey.php
+++ b/src/Domain/Auth/ApiKey.php
@@ -46,18 +46,56 @@ class ApiKey
         $this->keyHash = $keyHash;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getUser(): User { return $this->user; }
-    public function getLabel(): string { return $this->label; }
-    public function getKeyHash(): string { return $this->keyHash; }
-    public function isActive(): bool { return $this->isActive; }
-    public function setIsActive(bool $active): void { $this->isActive = $active; }
-    public function getLastUsedAt(): ?\DateTimeImmutable { return $this->lastUsedAt; }
-    public function getExpiresAt(): ?\DateTimeImmutable { return $this->expiresAt; }
-    public function setExpiresAt(?\DateTimeImmutable $expiresAt): void { $this->expiresAt = $expiresAt; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getUser(): User
+    {
+        return $this->user;
+    }
+
+    public function getLabel(): string
+    {
+        return $this->label;
+    }
+
+    public function getKeyHash(): string
+    {
+        return $this->keyHash;
+    }
+
+    public function isActive(): bool
+    {
+        return $this->isActive;
+    }
+
+    public function setIsActive(bool $active): void
+    {
+        $this->isActive = $active;
+    }
+
+    public function getLastUsedAt(): ?\DateTimeImmutable
+    {
+        return $this->lastUsedAt;
+    }
+
+    public function getExpiresAt(): ?\DateTimeImmutable
+    {
+        return $this->expiresAt;
+    }
+
+    public function setExpiresAt(?\DateTimeImmutable $expiresAt): void
+    {
+        $this->expiresAt = $expiresAt;
+    }
 
     /** @return array<string, bool> */
-    public function getPermissions(): array { return $this->permissions; }
+    public function getPermissions(): array
+    {
+        return $this->permissions;
+    }
 
     public function hasPermission(string $permission): bool
     {
diff --git a/src/Domain/Auth/User.php b/src/Domain/Auth/User.php
index a4cc8b9..33c8ba1 100644
--- a/src/Domain/Auth/User.php
+++ b/src/Domain/Auth/User.php
@@ -40,23 +40,64 @@ class User implements UserInterface, PasswordAuthenticatedUserInterface
         $this->passwordHash = $passwordHash;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getEmail(): string { return $this->email; }
-    public function getPassword(): string { return $this->passwordHash; }
-    public function getUserIdentifier(): string { return $this->email; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getEmail(): string
+    {
+        return $this->email;
+    }
+
+    public function getPassword(): string
+    {
+        return $this->passwordHash;
+    }
+
+    /** @return non-empty-string */
+    public function getUserIdentifier(): string
+    {
+        \assert('' !== $this->email);
+
+        return $this->email;
+    }
 
     /** @return list<string> */
-    public function getRoles(): array { return ['ROLE_USER']; }
+    public function getRoles(): array
+    {
+        return ['ROLE_USER'];
+    }
 
-    public function eraseCredentials(): void {}
+    public function eraseCredentials(): void
+    {
+    }
 
-    public function getTotpSecret(): ?string { return $this->totpSecret; }
-    public function setTotpSecret(?string $secret): void { $this->totpSecret = $secret; }
-    public function isActive(): bool { return $this->isActive; }
-    public function setIsActive(bool $active): void { $this->isActive = $active; }
+    public function getTotpSecret(): ?string
+    {
+        return $this->totpSecret;
+    }
+
+    public function setTotpSecret(?string $secret): void
+    {
+        $this->totpSecret = $secret;
+    }
+
+    public function isActive(): bool
+    {
+        return $this->isActive;
+    }
+
+    public function setIsActive(bool $active): void
+    {
+        $this->isActive = $active;
+    }
 
     /** @return array<string, bool> */
-    public function getPermissions(): array { return $this->permissions; }
+    public function getPermissions(): array
+    {
+        return $this->permissions;
+    }
 
     public function hasPermission(string $permission): bool
     {
diff --git a/src/Domain/Channel/ArticleTypePlatformConfig.php b/src/Domain/Channel/ArticleTypePlatformConfig.php
index e5d209a..e65bd33 100644
--- a/src/Domain/Channel/ArticleTypePlatformConfig.php
+++ b/src/Domain/Channel/ArticleTypePlatformConfig.php
@@ -43,12 +43,34 @@ class ArticleTypePlatformConfig
         $this->attributeMappings = new ArrayCollection();
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getArticleType(): ArticleType { return $this->articleType; }
-    public function getPlatform(): Platform { return $this->platform; }
-    public function getCategoryId(): string { return $this->categoryId; }
-    public function setCategoryId(string $categoryId): void { $this->categoryId = $categoryId; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getArticleType(): ArticleType
+    {
+        return $this->articleType;
+    }
+
+    public function getPlatform(): Platform
+    {
+        return $this->platform;
+    }
+
+    public function getCategoryId(): string
+    {
+        return $this->categoryId;
+    }
+
+    public function setCategoryId(string $categoryId): void
+    {
+        $this->categoryId = $categoryId;
+    }
 
     /** @return Collection<int, AttributeMapping> */
-    public function getAttributeMappings(): Collection { return $this->attributeMappings; }
+    public function getAttributeMappings(): Collection
+    {
+        return $this->attributeMappings;
+    }
 }
diff --git a/src/Domain/Channel/AttributeMapping.php b/src/Domain/Channel/AttributeMapping.php
index b5e96a9..70d44f0 100644
--- a/src/Domain/Channel/AttributeMapping.php
+++ b/src/Domain/Channel/AttributeMapping.php
@@ -43,10 +43,33 @@ class AttributeMapping
         $this->channelField = $channelField;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getPlatformConfig(): ArticleTypePlatformConfig { return $this->platformConfig; }
-    public function getAttributeDefinition(): AttributeDefinition { return $this->attributeDefinition; }
-    public function getChannelField(): ChannelField { return $this->channelField; }
-    public function getTransformer(): ?string { return $this->transformer; }
-    public function setTransformer(?string $transformer): void { $this->transformer = $transformer; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getPlatformConfig(): ArticleTypePlatformConfig
+    {
+        return $this->platformConfig;
+    }
+
+    public function getAttributeDefinition(): AttributeDefinition
+    {
+        return $this->attributeDefinition;
+    }
+
+    public function getChannelField(): ChannelField
+    {
+        return $this->channelField;
+    }
+
+    public function getTransformer(): ?string
+    {
+        return $this->transformer;
+    }
+
+    public function setTransformer(?string $transformer): void
+    {
+        $this->transformer = $transformer;
+    }
 }
diff --git a/src/Domain/Channel/ChannelField.php b/src/Domain/Channel/ChannelField.php
index d7e9b1a..8104756 100644
--- a/src/Domain/Channel/ChannelField.php
+++ b/src/Domain/Channel/ChannelField.php
@@ -33,10 +33,33 @@ class ChannelField
         $this->path = $path;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getPlatform(): Platform { return $this->platform; }
-    public function getLabel(): string { return $this->label; }
-    public function setLabel(string $label): void { $this->label = $label; }
-    public function getPath(): string { return $this->path; }
-    public function setPath(string $path): void { $this->path = $path; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getPlatform(): Platform
+    {
+        return $this->platform;
+    }
+
+    public function getLabel(): string
+    {
+        return $this->label;
+    }
+
+    public function setLabel(string $label): void
+    {
+        $this->label = $label;
+    }
+
+    public function getPath(): string
+    {
+        return $this->path;
+    }
+
+    public function setPath(string $path): void
+    {
+        $this->path = $path;
+    }
 }
diff --git a/src/Domain/Channel/Platform.php b/src/Domain/Channel/Platform.php
index a44708c..980619f 100644
--- a/src/Domain/Channel/Platform.php
+++ b/src/Domain/Channel/Platform.php
@@ -32,14 +32,35 @@ class Platform
         $this->label = $label;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getType(): string { return $this->type; }
-    public function getLabel(): string { return $this->label; }
-    public function setLabel(string $label): void { $this->label = $label; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getType(): string
+    {
+        return $this->type;
+    }
+
+    public function getLabel(): string
+    {
+        return $this->label;
+    }
+
+    public function setLabel(string $label): void
+    {
+        $this->label = $label;
+    }
 
     /** @return array<string, mixed> */
-    public function getConfig(): array { return $this->config; }
+    public function getConfig(): array
+    {
+        return $this->config;
+    }
 
     /** @param array<string, mixed> $config */
-    public function setConfig(array $config): void { $this->config = $config; }
+    public function setConfig(array $config): void
+    {
+        $this->config = $config;
+    }
 }
diff --git a/src/Domain/Channel/Repository/ArticleTypePlatformConfigRepositoryInterface.php b/src/Domain/Channel/Repository/ArticleTypePlatformConfigRepositoryInterface.php
new file mode 100644
index 0000000..e20f96f
--- /dev/null
+++ b/src/Domain/Channel/Repository/ArticleTypePlatformConfigRepositoryInterface.php
@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Domain\Channel\Repository;
+
+use App\Domain\Channel\ArticleTypePlatformConfig;
+use Symfony\Component\Uid\Uuid;
+
+interface ArticleTypePlatformConfigRepositoryInterface
+{
+    public function findById(Uuid $id): ?ArticleTypePlatformConfig;
+
+    public function findByArticleTypeAndPlatform(Uuid $articleTypeId, Uuid $platformId): ?ArticleTypePlatformConfig;
+
+    /** @return list<ArticleTypePlatformConfig> */
+    public function findByArticleType(Uuid $articleTypeId): array;
+
+    public function save(ArticleTypePlatformConfig $config): void;
+
+    public function remove(ArticleTypePlatformConfig $config): void;
+}
diff --git a/src/Domain/Channel/Repository/AttributeMappingRepositoryInterface.php b/src/Domain/Channel/Repository/AttributeMappingRepositoryInterface.php
new file mode 100644
index 0000000..c7f189c
--- /dev/null
+++ b/src/Domain/Channel/Repository/AttributeMappingRepositoryInterface.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Domain\Channel\Repository;
+
+use App\Domain\Channel\AttributeMapping;
+use Symfony\Component\Uid\Uuid;
+
+interface AttributeMappingRepositoryInterface
+{
+    public function findById(Uuid $id): ?AttributeMapping;
+
+    /** @return list<AttributeMapping> */
+    public function findByPlatformConfig(Uuid $platformConfigId): array;
+
+    public function save(AttributeMapping $mapping): void;
+
+    public function remove(AttributeMapping $mapping): void;
+}
diff --git a/src/Domain/Channel/Repository/ChannelFieldRepositoryInterface.php b/src/Domain/Channel/Repository/ChannelFieldRepositoryInterface.php
new file mode 100644
index 0000000..e9729f2
--- /dev/null
+++ b/src/Domain/Channel/Repository/ChannelFieldRepositoryInterface.php
@@ -0,0 +1,20 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Domain\Channel\Repository;
+
+use App\Domain\Channel\ChannelField;
+use Symfony\Component\Uid\Uuid;
+
+interface ChannelFieldRepositoryInterface
+{
+    public function findById(Uuid $id): ?ChannelField;
+
+    /** @return list<ChannelField> */
+    public function findByPlatform(Uuid $platformId): array;
+
+    public function save(ChannelField $field): void;
+
+    public function remove(ChannelField $field): void;
+}
diff --git a/src/Domain/Order/Customer.php b/src/Domain/Order/Customer.php
index a263b30..5c5713b 100644
--- a/src/Domain/Order/Customer.php
+++ b/src/Domain/Order/Customer.php
@@ -43,18 +43,42 @@ class Customer
         $this->address = $address;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getName(): string { return $this->name; }
-    public function getEmail(): string { return $this->email; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getName(): string
+    {
+        return $this->name;
+    }
+
+    public function getEmail(): string
+    {
+        return $this->email;
+    }
 
     /** @return array<string, string> */
-    public function getAddress(): array { return $this->address; }
+    public function getAddress(): array
+    {
+        return $this->address;
+    }
 
-    public function getFrappeCustomerId(): ?string { return $this->frappeCustomerId; }
-    public function setFrappeCustomerId(?string $id): void { $this->frappeCustomerId = $id; }
+    public function getFrappeCustomerId(): ?string
+    {
+        return $this->frappeCustomerId;
+    }
+
+    public function setFrappeCustomerId(?string $id): void
+    {
+        $this->frappeCustomerId = $id;
+    }
 
     /** @return array<string, string> */
-    public function getPlatformIds(): array { return $this->platformIds; }
+    public function getPlatformIds(): array
+    {
+        return $this->platformIds;
+    }
 
     public function getPlatformId(string $platform): ?string
     {
@@ -68,7 +92,7 @@ class Customer
 
     public function getMatchingKey(): string
     {
-        return \mb_strtolower(\implode('|', [
+        return mb_strtolower(implode('|', [
             $this->name,
             $this->address['street'] ?? '',
             $this->address['city'] ?? '',
diff --git a/src/Domain/Order/Invoice.php b/src/Domain/Order/Invoice.php
index 9f5f344..108ec77 100644
--- a/src/Domain/Order/Invoice.php
+++ b/src/Domain/Order/Invoice.php
@@ -50,13 +50,40 @@ class Invoice
         $this->createdAt = new \DateTimeImmutable();
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getOrder(): Order { return $this->order; }
-    public function getFrappeInvoiceId(): string { return $this->frappeInvoiceId; }
-    public function getStoragePath(): StoragePath { return $this->storagePath; }
-    public function getFilename(): string { return $this->filename; }
-    public function getCreatedAt(): \DateTimeImmutable { return $this->createdAt; }
-    public function getEmailedAt(): ?\DateTimeImmutable { return $this->emailedAt; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getOrder(): Order
+    {
+        return $this->order;
+    }
+
+    public function getFrappeInvoiceId(): string
+    {
+        return $this->frappeInvoiceId;
+    }
+
+    public function getStoragePath(): StoragePath
+    {
+        return $this->storagePath;
+    }
+
+    public function getFilename(): string
+    {
+        return $this->filename;
+    }
+
+    public function getCreatedAt(): \DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getEmailedAt(): ?\DateTimeImmutable
+    {
+        return $this->emailedAt;
+    }
 
     public function markAsEmailed(): void
     {
diff --git a/src/Domain/Order/Order.php b/src/Domain/Order/Order.php
index 955a3bd..1ad1d98 100644
--- a/src/Domain/Order/Order.php
+++ b/src/Domain/Order/Order.php
@@ -87,19 +87,78 @@ class Order
         $this->trackingPushedToEbayAt = new \DateTimeImmutable();
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getArticle(): Article { return $this->article; }
-    public function getCustomer(): Customer { return $this->customer; }
-    public function getPlatform(): Platform { return $this->platform; }
-    public function getPlatformOrderId(): string { return $this->platformOrderId; }
-    public function getStatus(): OrderStatus { return $this->status; }
-    public function setStatus(OrderStatus $status): void { $this->status = $status; }
-    public function getSalePrice(): string { return $this->salePrice; }
-    public function getSaleDate(): \DateTimeImmutable { return $this->saleDate; }
-    public function getTrackingNumber(): ?string { return $this->trackingNumber; }
-    public function getCarrier(): ?string { return $this->carrier; }
-    public function getShippedAt(): ?\DateTimeImmutable { return $this->shippedAt; }
-    public function getTrackingPushedToEbayAt(): ?\DateTimeImmutable { return $this->trackingPushedToEbayAt; }
-    public function getInvoice(): ?Invoice { return $this->invoice; }
-    public function setInvoice(Invoice $invoice): void { $this->invoice = $invoice; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getArticle(): Article
+    {
+        return $this->article;
+    }
+
+    public function getCustomer(): Customer
+    {
+        return $this->customer;
+    }
+
+    public function getPlatform(): Platform
+    {
+        return $this->platform;
+    }
+
+    public function getPlatformOrderId(): string
+    {
+        return $this->platformOrderId;
+    }
+
+    public function getStatus(): OrderStatus
+    {
+        return $this->status;
+    }
+
+    public function setStatus(OrderStatus $status): void
+    {
+        $this->status = $status;
+    }
+
+    public function getSalePrice(): string
+    {
+        return $this->salePrice;
+    }
+
+    public function getSaleDate(): \DateTimeImmutable
+    {
+        return $this->saleDate;
+    }
+
+    public function getTrackingNumber(): ?string
+    {
+        return $this->trackingNumber;
+    }
+
+    public function getCarrier(): ?string
+    {
+        return $this->carrier;
+    }
+
+    public function getShippedAt(): ?\DateTimeImmutable
+    {
+        return $this->shippedAt;
+    }
+
+    public function getTrackingPushedToEbayAt(): ?\DateTimeImmutable
+    {
+        return $this->trackingPushedToEbayAt;
+    }
+
+    public function getInvoice(): ?Invoice
+    {
+        return $this->invoice;
+    }
+
+    public function setInvoice(Invoice $invoice): void
+    {
+        $this->invoice = $invoice;
+    }
 }
diff --git a/src/Domain/Pipeline/AIPipelineJob.php b/src/Domain/Pipeline/AIPipelineJob.php
index 2e4a07c..5d2a043 100644
--- a/src/Domain/Pipeline/AIPipelineJob.php
+++ b/src/Domain/Pipeline/AIPipelineJob.php
@@ -37,9 +37,9 @@ class AIPipelineJob
     #[ORM\Column(type: 'json')]
     private array $outputData = [];
 
-    /** @var list<string> */
+    /** @var list<string>|null */
     #[ORM\Column(type: 'simple_array', nullable: true)]
-    private array $missingFields = [];
+    private ?array $missingFields = [];
 
     #[ORM\Column(type: 'text', nullable: true)]
     private ?string $errorMessage = null;
@@ -62,7 +62,10 @@ class AIPipelineJob
         $this->createdAt = new \DateTimeImmutable();
     }
 
-    public function incrementAttempt(): void { ++$this->attemptCount; }
+    public function incrementAttempt(): void
+    {
+        ++$this->attemptCount;
+    }
 
     public function markCompleted(): void
     {
@@ -82,30 +85,83 @@ class AIPipelineJob
         $this->errorMessage = $reason;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getType(): AIPipelineJobType { return $this->type; }
-    public function getArticle(): ?Article { return $this->article; }
-    public function setArticle(Article $article): void { $this->article = $article; }
-    public function getStatus(): AIPipelineJobStatus { return $this->status; }
-    public function setStatus(AIPipelineJobStatus $status): void { $this->status = $status; }
-    public function getAttemptCount(): int { return $this->attemptCount; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getType(): AIPipelineJobType
+    {
+        return $this->type;
+    }
+
+    public function getArticle(): ?Article
+    {
+        return $this->article;
+    }
+
+    public function setArticle(Article $article): void
+    {
+        $this->article = $article;
+    }
+
+    public function getStatus(): AIPipelineJobStatus
+    {
+        return $this->status;
+    }
+
+    public function setStatus(AIPipelineJobStatus $status): void
+    {
+        $this->status = $status;
+    }
+
+    public function getAttemptCount(): int
+    {
+        return $this->attemptCount;
+    }
 
     /** @return array<string, mixed> */
-    public function getInputData(): array { return $this->inputData; }
+    public function getInputData(): array
+    {
+        return $this->inputData;
+    }
 
     /** @return array<string, mixed> */
-    public function getOutputData(): array { return $this->outputData; }
+    public function getOutputData(): array
+    {
+        return $this->outputData;
+    }
 
     /** @param array<string, mixed> $outputData */
-    public function setOutputData(array $outputData): void { $this->outputData = $outputData; }
+    public function setOutputData(array $outputData): void
+    {
+        $this->outputData = $outputData;
+    }
 
     /** @return list<string> */
-    public function getMissingFields(): array { return $this->missingFields; }
+    public function getMissingFields(): array
+    {
+        return $this->missingFields ?? [];
+    }
 
     /** @param list<string> $fields */
-    public function setMissingFields(array $fields): void { $this->missingFields = $fields; }
+    public function setMissingFields(array $fields): void
+    {
+        $this->missingFields = $fields;
+    }
 
-    public function getErrorMessage(): ?string { return $this->errorMessage; }
-    public function getCreatedAt(): \DateTimeImmutable { return $this->createdAt; }
-    public function getCompletedAt(): ?\DateTimeImmutable { return $this->completedAt; }
+    public function getErrorMessage(): ?string
+    {
+        return $this->errorMessage;
+    }
+
+    public function getCreatedAt(): \DateTimeImmutable
+    {
+        return $this->createdAt;
+    }
+
+    public function getCompletedAt(): ?\DateTimeImmutable
+    {
+        return $this->completedAt;
+    }
 }
diff --git a/src/Domain/Storage/Repository/StoragePathRepositoryInterface.php b/src/Domain/Storage/Repository/StoragePathRepositoryInterface.php
new file mode 100644
index 0000000..bd360e9
--- /dev/null
+++ b/src/Domain/Storage/Repository/StoragePathRepositoryInterface.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Domain\Storage\Repository;
+
+use App\Domain\Storage\StoragePath;
+use Symfony\Component\Uid\Uuid;
+
+interface StoragePathRepositoryInterface
+{
+    public function findById(Uuid $id): ?StoragePath;
+
+    /** @return list<StoragePath> active paths ordered by priority DESC */
+    public function findActiveSortedByPriority(): array;
+
+    public function save(StoragePath $storagePath): void;
+}
diff --git a/src/Domain/Storage/StoragePath.php b/src/Domain/Storage/StoragePath.php
index df082aa..0617aa3 100644
--- a/src/Domain/Storage/StoragePath.php
+++ b/src/Domain/Storage/StoragePath.php
@@ -45,17 +45,48 @@ class StoragePath
         $this->isActive = $isActive;
     }
 
-    public function getId(): Uuid { return $this->id; }
-    public function getLabel(): string { return $this->label; }
-    public function getBasePath(): string { return $this->basePath; }
-    public function setBasePath(string $basePath): void { $this->basePath = $basePath; }
-    public function getQuotaBytes(): int { return $this->quotaBytes; }
-    public function getPriority(): int { return $this->priority; }
-    public function isActive(): bool { return $this->isActive; }
-    public function setIsActive(bool $isActive): void { $this->isActive = $isActive; }
+    public function getId(): Uuid
+    {
+        return $this->id;
+    }
+
+    public function getLabel(): string
+    {
+        return $this->label;
+    }
+
+    public function getBasePath(): string
+    {
+        return $this->basePath;
+    }
+
+    public function setBasePath(string $basePath): void
+    {
+        $this->basePath = $basePath;
+    }
+
+    public function getQuotaBytes(): int
+    {
+        return $this->quotaBytes;
+    }
+
+    public function getPriority(): int
+    {
+        return $this->priority;
+    }
+
+    public function isActive(): bool
+    {
+        return $this->isActive;
+    }
+
+    public function setIsActive(bool $isActive): void
+    {
+        $this->isActive = $isActive;
+    }
 
     public function resolveFilePath(string $filename): string
     {
-        return \rtrim($this->basePath, '/').'/'.$filename;
+        return rtrim($this->basePath, '/').'/'.$filename;
     }
 }
diff --git a/src/Infrastructure/Http/Controller/Api/ArticleController.php b/src/Infrastructure/Http/Controller/Api/ArticleController.php
new file mode 100644
index 0000000..70a54fc
--- /dev/null
+++ b/src/Infrastructure/Http/Controller/Api/ArticleController.php
@@ -0,0 +1,176 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Http\Controller\Api;
+
+use App\Application\Article\ArticleService;
+use App\Domain\Article\ArticleCondition;
+use App\Domain\Article\ArticleStatus;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Uid\Uuid;
+
+#[Route('/articles', name: 'api_articles_')]
+final class ArticleController extends AbstractController
+{
+    public function __construct(private readonly ArticleService $service)
+    {
+    }
+
+    #[Route('', name: 'list', methods: ['GET'])]
+    public function list(Request $request): JsonResponse
+    {
+        $statusParam = $request->query->getString('status', 'draft');
+        $status = ArticleStatus::tryFrom($statusParam) ?? ArticleStatus::Draft;
+
+        return $this->json(array_map(
+            static fn ($a) => [
+                'id' => $a->getId()->toRfc4122(),
+                'sku' => $a->getSku(),
+                'inventoryNumber' => $a->getInventoryNumber(),
+                'status' => $a->getStatus()->value,
+                'articleType' => $a->getArticleType()->getName(),
+                'condition' => $a->getCondition()->value,
+                'stock' => $a->getStock(),
+                'listingPrice' => $a->getListingPrice(),
+            ],
+            $this->service->findByStatus($status),
+        ));
+    }
+
+    #[Route('', name: 'create', methods: ['POST'])]
+    public function create(Request $request): JsonResponse
+    {
+        $data = $request->toArray();
+        if (empty($data['articleTypeId']) || empty($data['condition'])) {
+            return $this->json(['error' => 'articleTypeId and condition are required'], Response::HTTP_BAD_REQUEST);
+        }
+
+        $condition = ArticleCondition::tryFrom($data['condition']);
+        if (null === $condition) {
+            $valid = implode(', ', array_column(ArticleCondition::cases(), 'value'));
+
+            return $this->json(['error' => "condition must be one of: {$valid}"], Response::HTTP_BAD_REQUEST);
+        }
+
+        try {
+            $article = $this->service->create(
+                Uuid::fromString($data['articleTypeId']),
+                $condition,
+                (int) ($data['stock'] ?? 1),
+                $data['conditionNotes'] ?? null,
+            );
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_UNPROCESSABLE_ENTITY);
+        }
+
+        return $this->json([
+            'id' => $article->getId()->toRfc4122(),
+            'sku' => $article->getSku(),
+            'inventoryNumber' => $article->getInventoryNumber(),
+            'status' => $article->getStatus()->value,
+        ], Response::HTTP_CREATED);
+    }
+
+    #[Route('/{id}', name: 'get', methods: ['GET'])]
+    public function get(string $id): JsonResponse
+    {
+        $article = $this->service->findById(Uuid::fromString($id));
+        if (null === $article) {
+            return $this->json(['error' => 'Not found'], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json([
+            'id' => $article->getId()->toRfc4122(),
+            'sku' => $article->getSku(),
+            'inventoryNumber' => $article->getInventoryNumber(),
+            'status' => $article->getStatus()->value,
+            'articleType' => ['id' => $article->getArticleType()->getId()->toRfc4122(), 'name' => $article->getArticleType()->getName()],
+            'condition' => $article->getCondition()->value,
+            'conditionNotes' => $article->getConditionNotes(),
+            'stock' => $article->getStock(),
+            'listingPrice' => $article->getListingPrice(),
+            'serialNumber' => $article->getSerialNumber(),
+            'ebayListingId' => $article->getEbayListingId(),
+            'ebayTitle' => $article->getEbayTitle(),
+            'ebayDescription' => $article->getEbayDescription(),
+            'attributes' => array_map(static fn ($v) => [
+                'definitionId' => $v->getAttributeDefinition()->getId()->toRfc4122(),
+                'name' => $v->getAttributeDefinition()->getName(),
+                'value' => $v->getValue(),
+            ], $article->getAttributeValues()->toArray()),
+            'photos' => array_map(static fn ($p) => [
+                'id' => $p->getId()->toRfc4122(),
+                'isMain' => $p->isMain(),
+                'order' => $p->getSortOrder(),
+            ], $article->getPhotos()->toArray()),
+        ]);
+    }
+
+    #[Route('/{id}/attributes', name: 'update_attributes', methods: ['PATCH'])]
+    public function updateAttributes(string $id, Request $request): JsonResponse
+    {
+        $rawValues = $request->toArray()['attributes'] ?? [];
+        if (!\is_array($rawValues)) {
+            return $this->json(['error' => 'attributes must be an object mapping definitionId => value'], Response::HTTP_BAD_REQUEST);
+        }
+
+        /** @var array<string, string> $values */
+        $values = $rawValues;
+
+        try {
+            $article = $this->service->updateAttributes(Uuid::fromString($id), $values);
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_UNPROCESSABLE_ENTITY);
+        }
+
+        return $this->json(['id' => $article->getId()->toRfc4122(), 'status' => $article->getStatus()->value]);
+    }
+
+    #[Route('/{id}', name: 'update', methods: ['PATCH'])]
+    public function update(string $id, Request $request): JsonResponse
+    {
+        $data = $request->toArray();
+
+        try {
+            if (\array_key_exists('listingPrice', $data)) {
+                $price = null !== $data['listingPrice'] ? (string) $data['listingPrice'] : null;
+                $this->service->setListingPrice(Uuid::fromString($id), $price);
+            }
+            if (\array_key_exists('ebayTitle', $data) || \array_key_exists('ebayDescription', $data)) {
+                $this->service->setEbayTexts(
+                    Uuid::fromString($id),
+                    $data['ebayTitle'] ?? null,
+                    $data['ebayDescription'] ?? null,
+                );
+            }
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json(['id' => $id]);
+    }
+
+    #[Route('/{id}/activate', name: 'activate', methods: ['POST'])]
+    public function activate(string $id): JsonResponse
+    {
+        try {
+            $result = $this->service->activate(Uuid::fromString($id));
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_UNPROCESSABLE_ENTITY);
+        }
+
+        if ([] !== $result['missing']) {
+            return $this->json([
+                'error' => 'Cannot activate: missing required attributes',
+                'missing' => $result['missing'],
+            ], Response::HTTP_UNPROCESSABLE_ENTITY);
+        }
+
+        return $this->json(['id' => $result['article']->getId()->toRfc4122(), 'status' => $result['article']->getStatus()->value]);
+    }
+}
diff --git a/src/Infrastructure/Http/Controller/Api/ArticleTypeController.php b/src/Infrastructure/Http/Controller/Api/ArticleTypeController.php
new file mode 100644
index 0000000..4cbe8ef
--- /dev/null
+++ b/src/Infrastructure/Http/Controller/Api/ArticleTypeController.php
@@ -0,0 +1,135 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Http\Controller\Api;
+
+use App\Application\Article\ArticleTypeService;
+use App\Domain\Article\AttributeType;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Uid\Uuid;
+
+#[Route('/article-types', name: 'api_article_types_')]
+final class ArticleTypeController extends AbstractController
+{
+    public function __construct(private readonly ArticleTypeService $service)
+    {
+    }
+
+    #[Route('', name: 'list', methods: ['GET'])]
+    public function list(): JsonResponse
+    {
+        $types = $this->service->findAll();
+
+        return $this->json(array_map(static fn ($t) => [
+            'id' => $t->getId()->toRfc4122(),
+            'name' => $t->getName(),
+            'attributes' => array_map(static fn ($a) => [
+                'id' => $a->getId()->toRfc4122(),
+                'name' => $a->getName(),
+                'type' => $a->getType()->value,
+                'unit' => $a->getUnit(),
+                'options' => $a->getOptions(),
+            ], $t->getAttributeDefinitions()->toArray()),
+        ], $types));
+    }
+
+    #[Route('', name: 'create', methods: ['POST'])]
+    public function create(Request $request): JsonResponse
+    {
+        $data = $request->toArray();
+        if (empty($data['name'])) {
+            return $this->json(['error' => 'name is required'], Response::HTTP_BAD_REQUEST);
+        }
+
+        $type = $this->service->create($data['name']);
+
+        return $this->json(['id' => $type->getId()->toRfc4122(), 'name' => $type->getName()], Response::HTTP_CREATED);
+    }
+
+    #[Route('/{id}', name: 'get', methods: ['GET'])]
+    public function get(string $id): JsonResponse
+    {
+        $type = $this->service->findById(Uuid::fromString($id));
+        if (null === $type) {
+            return $this->json(['error' => 'Not found'], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json([
+            'id' => $type->getId()->toRfc4122(),
+            'name' => $type->getName(),
+            'attributes' => array_map(static fn ($a) => [
+                'id' => $a->getId()->toRfc4122(),
+                'name' => $a->getName(),
+                'type' => $a->getType()->value,
+                'unit' => $a->getUnit(),
+                'options' => $a->getOptions(),
+            ], $type->getAttributeDefinitions()->toArray()),
+        ]);
+    }
+
+    #[Route('/{id}', name: 'rename', methods: ['PATCH'])]
+    public function rename(string $id, Request $request): JsonResponse
+    {
+        $data = $request->toArray();
+        if (empty($data['name'])) {
+            return $this->json(['error' => 'name is required'], Response::HTTP_BAD_REQUEST);
+        }
+
+        try {
+            $type = $this->service->rename(Uuid::fromString($id), $data['name']);
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json(['id' => $type->getId()->toRfc4122(), 'name' => $type->getName()]);
+    }
+
+    #[Route('/{id}/attributes', name: 'add_attribute', methods: ['POST'])]
+    public function addAttribute(string $id, Request $request): JsonResponse
+    {
+        $data = $request->toArray();
+        if (empty($data['name']) || empty($data['type'])) {
+            return $this->json(['error' => 'name and type are required'], Response::HTTP_BAD_REQUEST);
+        }
+
+        $attrType = AttributeType::tryFrom($data['type']);
+        if (null === $attrType) {
+            $valid = implode(', ', array_column(AttributeType::cases(), 'value'));
+
+            return $this->json(['error' => "type must be one of: {$valid}"], Response::HTTP_BAD_REQUEST);
+        }
+
+        try {
+            $def = $this->service->createAttribute($data['name'], $attrType, $data['unit'] ?? null, $data['options'] ?? null);
+            $type = $this->service->addAttribute(Uuid::fromString($id), $def);
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json([
+            'id' => $type->getId()->toRfc4122(),
+            'attributes' => array_map(static fn ($a) => [
+                'id' => $a->getId()->toRfc4122(),
+                'name' => $a->getName(),
+                'type' => $a->getType()->value,
+            ], $type->getAttributeDefinitions()->toArray()),
+        ], Response::HTTP_CREATED);
+    }
+
+    #[Route('/{id}/attributes/{attrId}', name: 'remove_attribute', methods: ['DELETE'])]
+    public function removeAttribute(string $id, string $attrId): JsonResponse
+    {
+        try {
+            $this->service->removeAttribute(Uuid::fromString($id), Uuid::fromString($attrId));
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json(null, Response::HTTP_NO_CONTENT);
+    }
+}
diff --git a/src/Infrastructure/Http/Controller/Api/MappingController.php b/src/Infrastructure/Http/Controller/Api/MappingController.php
new file mode 100644
index 0000000..5359d23
--- /dev/null
+++ b/src/Infrastructure/Http/Controller/Api/MappingController.php
@@ -0,0 +1,90 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Http\Controller\Api;
+
+use App\Application\Channel\MappingService;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Uid\Uuid;
+
+#[Route('/article-types/{typeId}/platform-configs', name: 'api_mapping_')]
+final class MappingController extends AbstractController
+{
+    public function __construct(private readonly MappingService $service)
+    {
+    }
+
+    #[Route('', name: 'list', methods: ['GET'])]
+    public function list(string $typeId): JsonResponse
+    {
+        $configs = $this->service->findConfigsByArticleType(Uuid::fromString($typeId));
+
+        return $this->json(array_map(static fn ($c) => [
+            'id' => $c->getId()->toRfc4122(),
+            'platform' => ['id' => $c->getPlatform()->getId()->toRfc4122(), 'label' => $c->getPlatform()->getLabel()],
+            'categoryId' => $c->getCategoryId(),
+            'mappings' => array_map(static fn ($m) => [
+                'id' => $m->getId()->toRfc4122(),
+                'attribute' => ['id' => $m->getAttributeDefinition()->getId()->toRfc4122(), 'name' => $m->getAttributeDefinition()->getName()],
+                'channelField' => ['id' => $m->getChannelField()->getId()->toRfc4122(), 'path' => $m->getChannelField()->getPath()],
+                'transformer' => $m->getTransformer(),
+            ], $c->getAttributeMappings()->toArray()),
+        ], $configs));
+    }
+
+    #[Route('', name: 'create_config', methods: ['POST'])]
+    public function createConfig(string $typeId, Request $request): JsonResponse
+    {
+        $data = $request->toArray();
+        if (empty($data['platformId']) || empty($data['categoryId'])) {
+            return $this->json(['error' => 'platformId and categoryId are required'], Response::HTTP_BAD_REQUEST);
+        }
+
+        try {
+            $config = $this->service->createConfig(Uuid::fromString($typeId), Uuid::fromString($data['platformId']), $data['categoryId']);
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_UNPROCESSABLE_ENTITY);
+        }
+
+        return $this->json(['id' => $config->getId()->toRfc4122()], Response::HTTP_CREATED);
+    }
+
+    #[Route('/{configId}/mappings', name: 'add_mapping', methods: ['POST'])]
+    public function addMapping(string $typeId, string $configId, Request $request): JsonResponse
+    {
+        $data = $request->toArray();
+        if (empty($data['attributeDefinitionId']) || empty($data['channelFieldId'])) {
+            return $this->json(['error' => 'attributeDefinitionId and channelFieldId are required'], Response::HTTP_BAD_REQUEST);
+        }
+
+        try {
+            $mapping = $this->service->addMapping(
+                Uuid::fromString($configId),
+                Uuid::fromString($data['attributeDefinitionId']),
+                Uuid::fromString($data['channelFieldId']),
+                $data['transformer'] ?? null,
+            );
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_UNPROCESSABLE_ENTITY);
+        }
+
+        return $this->json(['id' => $mapping->getId()->toRfc4122()], Response::HTTP_CREATED);
+    }
+
+    #[Route('/mappings/{mappingId}', name: 'remove_mapping', methods: ['DELETE'])]
+    public function removeMapping(string $typeId, string $mappingId): JsonResponse
+    {
+        try {
+            $this->service->removeMapping(Uuid::fromString($mappingId));
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json(null, Response::HTTP_NO_CONTENT);
+    }
+}
diff --git a/src/Infrastructure/Http/Controller/Api/PhotoController.php b/src/Infrastructure/Http/Controller/Api/PhotoController.php
new file mode 100644
index 0000000..f6e5e28
--- /dev/null
+++ b/src/Infrastructure/Http/Controller/Api/PhotoController.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Http\Controller\Api;
+
+use App\Application\Article\PhotoService;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\File\UploadedFile;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Uid\Uuid;
+
+#[Route('/articles/{articleId}/photos', name: 'api_photos_')]
+final class PhotoController extends AbstractController
+{
+    public function __construct(private readonly PhotoService $service)
+    {
+    }
+
+    #[Route('', name: 'upload', methods: ['POST'])]
+    public function upload(string $articleId, Request $request): JsonResponse
+    {
+        $file = $request->files->get('photo');
+        if (!$file instanceof UploadedFile) {
+            return $this->json(['error' => 'photo file is required (multipart/form-data, field: photo)'], Response::HTTP_BAD_REQUEST);
+        }
+
+        $allowedMimes = ['image/jpeg', 'image/png', 'image/webp'];
+        if (!\in_array($file->getMimeType(), $allowedMimes, strict: true)) {
+            return $this->json(['error' => 'Only JPEG, PNG and WebP images are allowed'], Response::HTTP_BAD_REQUEST);
+        }
+
+        try {
+            $photo = $this->service->upload(
+                Uuid::fromString($articleId),
+                $file->getPathname(),
+                $file->getClientOriginalName(),
+            );
+        } catch (\DomainException|\RuntimeException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_UNPROCESSABLE_ENTITY);
+        }
+
+        return $this->json([
+            'id' => $photo->getId()->toRfc4122(),
+            'isMain' => $photo->isMain(),
+            'sortOrder' => $photo->getSortOrder(),
+        ], Response::HTTP_CREATED);
+    }
+
+    #[Route('/{photoId}/main', name: 'set_main', methods: ['PATCH'])]
+    public function setMain(string $articleId, string $photoId): JsonResponse
+    {
+        try {
+            $this->service->setMain(Uuid::fromString($photoId));
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json(null, Response::HTTP_NO_CONTENT);
+    }
+
+    #[Route('/{photoId}', name: 'delete', methods: ['DELETE'])]
+    public function delete(string $articleId, string $photoId): JsonResponse
+    {
+        try {
+            $this->service->delete(Uuid::fromString($photoId));
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json(null, Response::HTTP_NO_CONTENT);
+    }
+}
diff --git a/src/Infrastructure/Http/Controller/Api/PlatformController.php b/src/Infrastructure/Http/Controller/Api/PlatformController.php
new file mode 100644
index 0000000..e9aa8e0
--- /dev/null
+++ b/src/Infrastructure/Http/Controller/Api/PlatformController.php
@@ -0,0 +1,85 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Http\Controller\Api;
+
+use App\Application\Channel\PlatformService;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\JsonResponse;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\Routing\Attribute\Route;
+use Symfony\Component\Uid\Uuid;
+
+#[Route('/platforms', name: 'api_platforms_')]
+final class PlatformController extends AbstractController
+{
+    public function __construct(private readonly PlatformService $service)
+    {
+    }
+
+    #[Route('', name: 'list', methods: ['GET'])]
+    public function list(): JsonResponse
+    {
+        return $this->json(array_map(static fn ($p) => [
+            'id' => $p->getId()->toRfc4122(),
+            'type' => $p->getType(),
+            'label' => $p->getLabel(),
+        ], $this->service->findAll()));
+    }
+
+    #[Route('', name: 'create', methods: ['POST'])]
+    public function create(Request $request): JsonResponse
+    {
+        $data = $request->toArray();
+        if (empty($data['type']) || empty($data['label'])) {
+            return $this->json(['error' => 'type and label are required'], Response::HTTP_BAD_REQUEST);
+        }
+
+        $platform = $this->service->create($data['type'], $data['label'], $data['config'] ?? []);
+
+        return $this->json(['id' => $platform->getId()->toRfc4122(), 'type' => $platform->getType()], Response::HTTP_CREATED);
+    }
+
+    #[Route('/{id}/channel-fields', name: 'list_fields', methods: ['GET'])]
+    public function listFields(string $id): JsonResponse
+    {
+        $fields = $this->service->findChannelFields(Uuid::fromString($id));
+
+        return $this->json(array_map(static fn ($f) => [
+            'id' => $f->getId()->toRfc4122(),
+            'label' => $f->getLabel(),
+            'path' => $f->getPath(),
+        ], $fields));
+    }
+
+    #[Route('/{id}/channel-fields', name: 'add_field', methods: ['POST'])]
+    public function addField(string $id, Request $request): JsonResponse
+    {
+        $data = $request->toArray();
+        if (empty($data['label']) || empty($data['path'])) {
+            return $this->json(['error' => 'label and path are required'], Response::HTTP_BAD_REQUEST);
+        }
+
+        try {
+            $field = $this->service->addChannelField(Uuid::fromString($id), $data['label'], $data['path']);
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json(['id' => $field->getId()->toRfc4122(), 'label' => $field->getLabel()], Response::HTTP_CREATED);
+    }
+
+    #[Route('/channel-fields/{fieldId}', name: 'remove_field', methods: ['DELETE'])]
+    public function removeField(string $fieldId): JsonResponse
+    {
+        try {
+            $this->service->removeChannelField(Uuid::fromString($fieldId));
+        } catch (\DomainException $e) {
+            return $this->json(['error' => $e->getMessage()], Response::HTTP_NOT_FOUND);
+        }
+
+        return $this->json(null, Response::HTTP_NO_CONTENT);
+    }
+}
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineArticlePhotoRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineArticlePhotoRepository.php
new file mode 100644
index 0000000..b78e782
--- /dev/null
+++ b/src/Infrastructure/Persistence/Repository/DoctrineArticlePhotoRepository.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Persistence\Repository;
+
+use App\Domain\Article\ArticlePhoto;
+use App\Domain\Article\Repository\ArticlePhotoRepositoryInterface;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class DoctrineArticlePhotoRepository implements ArticlePhotoRepositoryInterface
+{
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
+
+    public function findById(Uuid $id): ?ArticlePhoto
+    {
+        return $this->em->find(ArticlePhoto::class, $id);
+    }
+
+    /** @return list<ArticlePhoto> */
+    public function findByArticle(Uuid $articleId): array
+    {
+        /** @var list<ArticlePhoto> */
+        return $this->em->getRepository(ArticlePhoto::class)
+            ->createQueryBuilder('p')
+            ->where('IDENTITY(p.article) = :articleId')
+            ->setParameter('articleId', $articleId->toRfc4122())
+            ->orderBy('p.sortOrder', 'ASC')
+            ->getQuery()
+            ->getResult();
+    }
+
+    public function save(ArticlePhoto $photo): void
+    {
+        $this->em->persist($photo);
+        $this->em->flush();
+    }
+
+    public function remove(ArticlePhoto $photo): void
+    {
+        $this->em->remove($photo);
+        $this->em->flush();
+    }
+}
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineArticleRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineArticleRepository.php
index 13fe758..d4ce6de 100644
--- a/src/Infrastructure/Persistence/Repository/DoctrineArticleRepository.php
+++ b/src/Infrastructure/Persistence/Repository/DoctrineArticleRepository.php
@@ -12,7 +12,9 @@ use Symfony\Component\Uid\Uuid;
 
 final class DoctrineArticleRepository implements ArticleRepositoryInterface
 {
-    public function __construct(private readonly EntityManagerInterface $em) {}
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
 
     public function findById(Uuid $id): ?Article
     {
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineArticleTypePlatformConfigRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineArticleTypePlatformConfigRepository.php
new file mode 100644
index 0000000..ddbd462
--- /dev/null
+++ b/src/Infrastructure/Persistence/Repository/DoctrineArticleTypePlatformConfigRepository.php
@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Persistence\Repository;
+
+use App\Domain\Channel\ArticleTypePlatformConfig;
+use App\Domain\Channel\Repository\ArticleTypePlatformConfigRepositoryInterface;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class DoctrineArticleTypePlatformConfigRepository implements ArticleTypePlatformConfigRepositoryInterface
+{
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
+
+    public function findById(Uuid $id): ?ArticleTypePlatformConfig
+    {
+        return $this->em->find(ArticleTypePlatformConfig::class, $id);
+    }
+
+    public function findByArticleTypeAndPlatform(Uuid $articleTypeId, Uuid $platformId): ?ArticleTypePlatformConfig
+    {
+        /** @var ArticleTypePlatformConfig|null */
+        return $this->em->getRepository(ArticleTypePlatformConfig::class)
+            ->createQueryBuilder('c')
+            ->where('IDENTITY(c.articleType) = :typeId')
+            ->andWhere('IDENTITY(c.platform) = :platformId')
+            ->setParameter('typeId', $articleTypeId->toRfc4122())
+            ->setParameter('platformId', $platformId->toRfc4122())
+            ->setMaxResults(1)
+            ->getQuery()
+            ->getOneOrNullResult();
+    }
+
+    /** @return list<ArticleTypePlatformConfig> */
+    public function findByArticleType(Uuid $articleTypeId): array
+    {
+        /** @var list<ArticleTypePlatformConfig> */
+        return $this->em->getRepository(ArticleTypePlatformConfig::class)
+            ->createQueryBuilder('c')
+            ->where('IDENTITY(c.articleType) = :typeId')
+            ->setParameter('typeId', $articleTypeId->toRfc4122())
+            ->getQuery()
+            ->getResult();
+    }
+
+    public function save(ArticleTypePlatformConfig $config): void
+    {
+        $this->em->persist($config);
+        $this->em->flush();
+    }
+
+    public function remove(ArticleTypePlatformConfig $config): void
+    {
+        $this->em->remove($config);
+        $this->em->flush();
+    }
+}
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineArticleTypeRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineArticleTypeRepository.php
index ebe67d2..fc2dcc2 100644
--- a/src/Infrastructure/Persistence/Repository/DoctrineArticleTypeRepository.php
+++ b/src/Infrastructure/Persistence/Repository/DoctrineArticleTypeRepository.php
@@ -11,7 +11,9 @@ use Symfony\Component\Uid\Uuid;
 
 final class DoctrineArticleTypeRepository implements ArticleTypeRepositoryInterface
 {
-    public function __construct(private readonly EntityManagerInterface $em) {}
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
 
     public function findById(Uuid $id): ?ArticleType
     {
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineAttributeMappingRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineAttributeMappingRepository.php
new file mode 100644
index 0000000..adba1c2
--- /dev/null
+++ b/src/Infrastructure/Persistence/Repository/DoctrineAttributeMappingRepository.php
@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Persistence\Repository;
+
+use App\Domain\Channel\AttributeMapping;
+use App\Domain\Channel\Repository\AttributeMappingRepositoryInterface;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class DoctrineAttributeMappingRepository implements AttributeMappingRepositoryInterface
+{
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
+
+    public function findById(Uuid $id): ?AttributeMapping
+    {
+        return $this->em->find(AttributeMapping::class, $id);
+    }
+
+    /** @return list<AttributeMapping> */
+    public function findByPlatformConfig(Uuid $platformConfigId): array
+    {
+        /** @var list<AttributeMapping> */
+        return $this->em->getRepository(AttributeMapping::class)
+            ->createQueryBuilder('m')
+            ->where('IDENTITY(m.platformConfig) = :configId')
+            ->setParameter('configId', $platformConfigId->toRfc4122())
+            ->getQuery()
+            ->getResult();
+    }
+
+    public function save(AttributeMapping $mapping): void
+    {
+        $this->em->persist($mapping);
+        $this->em->flush();
+    }
+
+    public function remove(AttributeMapping $mapping): void
+    {
+        $this->em->remove($mapping);
+        $this->em->flush();
+    }
+}
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineAttributeValueRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineAttributeValueRepository.php
new file mode 100644
index 0000000..4e4fa10
--- /dev/null
+++ b/src/Infrastructure/Persistence/Repository/DoctrineAttributeValueRepository.php
@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Persistence\Repository;
+
+use App\Domain\Article\AttributeValue;
+use App\Domain\Article\Repository\AttributeValueRepositoryInterface;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class DoctrineAttributeValueRepository implements AttributeValueRepositoryInterface
+{
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
+
+    /** @return list<AttributeValue> */
+    public function findByArticle(Uuid $articleId): array
+    {
+        /** @var list<AttributeValue> */
+        return $this->em->getRepository(AttributeValue::class)
+            ->createQueryBuilder('v')
+            ->where('IDENTITY(v.article) = :articleId')
+            ->setParameter('articleId', $articleId->toRfc4122())
+            ->getQuery()
+            ->getResult();
+    }
+
+    public function findByArticleAndDefinition(Uuid $articleId, Uuid $definitionId): ?AttributeValue
+    {
+        /** @var AttributeValue|null */
+        return $this->em->getRepository(AttributeValue::class)
+            ->createQueryBuilder('v')
+            ->where('IDENTITY(v.article) = :articleId')
+            ->andWhere('IDENTITY(v.attributeDefinition) = :defId')
+            ->setParameter('articleId', $articleId->toRfc4122())
+            ->setParameter('defId', $definitionId->toRfc4122())
+            ->setMaxResults(1)
+            ->getQuery()
+            ->getOneOrNullResult();
+    }
+
+    public function save(AttributeValue $value): void
+    {
+        $this->em->persist($value);
+        $this->em->flush();
+    }
+
+    public function remove(AttributeValue $value): void
+    {
+        $this->em->remove($value);
+        $this->em->flush();
+    }
+}
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineChannelFieldRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineChannelFieldRepository.php
new file mode 100644
index 0000000..d99518a
--- /dev/null
+++ b/src/Infrastructure/Persistence/Repository/DoctrineChannelFieldRepository.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Persistence\Repository;
+
+use App\Domain\Channel\ChannelField;
+use App\Domain\Channel\Repository\ChannelFieldRepositoryInterface;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class DoctrineChannelFieldRepository implements ChannelFieldRepositoryInterface
+{
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
+
+    public function findById(Uuid $id): ?ChannelField
+    {
+        return $this->em->find(ChannelField::class, $id);
+    }
+
+    /** @return list<ChannelField> */
+    public function findByPlatform(Uuid $platformId): array
+    {
+        /** @var list<ChannelField> */
+        return $this->em->getRepository(ChannelField::class)
+            ->createQueryBuilder('f')
+            ->where('IDENTITY(f.platform) = :platformId')
+            ->setParameter('platformId', $platformId->toRfc4122())
+            ->orderBy('f.label', 'ASC')
+            ->getQuery()
+            ->getResult();
+    }
+
+    public function save(ChannelField $field): void
+    {
+        $this->em->persist($field);
+        $this->em->flush();
+    }
+
+    public function remove(ChannelField $field): void
+    {
+        $this->em->remove($field);
+        $this->em->flush();
+    }
+}
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineCustomerRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineCustomerRepository.php
index da26ccc..682da94 100644
--- a/src/Infrastructure/Persistence/Repository/DoctrineCustomerRepository.php
+++ b/src/Infrastructure/Persistence/Repository/DoctrineCustomerRepository.php
@@ -11,7 +11,9 @@ use Symfony\Component\Uid\Uuid;
 
 final class DoctrineCustomerRepository implements CustomerRepositoryInterface
 {
-    public function __construct(private readonly EntityManagerInterface $em) {}
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
 
     public function findById(Uuid $id): ?Customer
     {
@@ -20,9 +22,10 @@ final class DoctrineCustomerRepository implements CustomerRepositoryInterface
 
     public function findByPlatformId(string $platform, string $platformUserId): ?Customer
     {
+        /** @var Customer|null */
         return $this->em->getRepository(Customer::class)
             ->createQueryBuilder('c')
-            ->where("JSON_UNQUOTE(JSON_EXTRACT(c.platformIds, :path)) = :id")
+            ->where('JSON_UNQUOTE(JSON_EXTRACT(c.platformIds, :path)) = :id')
             ->setParameter('path', '$."'.$platform.'"')
             ->setParameter('id', $platformUserId)
             ->setMaxResults(1)
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineOrderRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineOrderRepository.php
index 9340e0e..6b59d4d 100644
--- a/src/Infrastructure/Persistence/Repository/DoctrineOrderRepository.php
+++ b/src/Infrastructure/Persistence/Repository/DoctrineOrderRepository.php
@@ -11,7 +11,9 @@ use Symfony\Component\Uid\Uuid;
 
 final class DoctrineOrderRepository implements OrderRepositoryInterface
 {
-    public function __construct(private readonly EntityManagerInterface $em) {}
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
 
     public function findById(Uuid $id): ?Order
     {
diff --git a/src/Infrastructure/Persistence/Repository/DoctrinePlatformRepository.php b/src/Infrastructure/Persistence/Repository/DoctrinePlatformRepository.php
index 30ab749..3fab6c1 100644
--- a/src/Infrastructure/Persistence/Repository/DoctrinePlatformRepository.php
+++ b/src/Infrastructure/Persistence/Repository/DoctrinePlatformRepository.php
@@ -11,7 +11,9 @@ use Symfony\Component\Uid\Uuid;
 
 final class DoctrinePlatformRepository implements PlatformRepositoryInterface
 {
-    public function __construct(private readonly EntityManagerInterface $em) {}
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
 
     public function findById(Uuid $id): ?Platform
     {
diff --git a/src/Infrastructure/Persistence/Repository/DoctrineStoragePathRepository.php b/src/Infrastructure/Persistence/Repository/DoctrineStoragePathRepository.php
new file mode 100644
index 0000000..d2e5ee5
--- /dev/null
+++ b/src/Infrastructure/Persistence/Repository/DoctrineStoragePathRepository.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Persistence\Repository;
+
+use App\Domain\Storage\Repository\StoragePathRepositoryInterface;
+use App\Domain\Storage\StoragePath;
+use Doctrine\ORM\EntityManagerInterface;
+use Symfony\Component\Uid\Uuid;
+
+final class DoctrineStoragePathRepository implements StoragePathRepositoryInterface
+{
+    public function __construct(private readonly EntityManagerInterface $em)
+    {
+    }
+
+    public function findById(Uuid $id): ?StoragePath
+    {
+        return $this->em->find(StoragePath::class, $id);
+    }
+
+    /** @return list<StoragePath> */
+    public function findActiveSortedByPriority(): array
+    {
+        /** @var list<StoragePath> */
+        return $this->em->getRepository(StoragePath::class)
+            ->createQueryBuilder('s')
+            ->where('s.isActive = :active')
+            ->setParameter('active', true)
+            ->orderBy('s.priority', 'DESC')
+            ->getQuery()
+            ->getResult();
+    }
+
+    public function save(StoragePath $storagePath): void
+    {
+        $this->em->persist($storagePath);
+        $this->em->flush();
+    }
+}
diff --git a/src/Infrastructure/Storage/LocalStorageManager.php b/src/Infrastructure/Storage/LocalStorageManager.php
new file mode 100644
index 0000000..6d112c2
--- /dev/null
+++ b/src/Infrastructure/Storage/LocalStorageManager.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Infrastructure\Storage;
+
+use App\Application\Storage\StorageManagerInterface;
+use App\Application\Storage\StoredFile;
+use App\Domain\Storage\Repository\StoragePathRepositoryInterface;
+use App\Domain\Storage\StoragePath;
+use Symfony\Component\Uid\Uuid;
+
+final class LocalStorageManager implements StorageManagerInterface
+{
+    public function __construct(
+        private readonly StoragePathRepositoryInterface $storagePathRepository,
+    ) {
+    }
+
+    public function store(string $tempPath, string $originalFilename): StoredFile
+    {
+        $fileSize = filesize($tempPath);
+        if (false === $fileSize) {
+            throw new \RuntimeException("Cannot read file size for: {$tempPath}");
+        }
+
+        $paths = $this->storagePathRepository->findActiveSortedByPriority();
+
+        foreach ($paths as $storagePath) {
+            $used = $this->getUsedBytes($storagePath->getBasePath());
+            $available = $storagePath->getQuotaBytes() - $used;
+
+            if ($available < $fileSize) {
+                continue;
+            }
+
+            $ext = pathinfo($originalFilename, \PATHINFO_EXTENSION);
+            $filename = Uuid::v7()->toRfc4122().('' !== $ext ? '.'.$ext : '');
+            $destination = $storagePath->getBasePath().'/'.$filename;
+
+            if (!is_dir($storagePath->getBasePath())) {
+                mkdir($storagePath->getBasePath(), 0755, true);
+            }
+
+            rename($tempPath, $destination);
+
+            return new StoredFile($storagePath, $filename);
+        }
+
+        throw new \RuntimeException('No active storage path with sufficient quota available');
+    }
+
+    public function getFullPath(StoragePath $storagePath, string $filename): string
+    {
+        return $storagePath->getBasePath().'/'.$filename;
+    }
+
+    private function getUsedBytes(string $directory): int
+    {
+        if (!is_dir($directory)) {
+            return 0;
+        }
+
+        $total = 0;
+        $iterator = new \RecursiveIteratorIterator(
+            new \RecursiveDirectoryIterator($directory, \FilesystemIterator::SKIP_DOTS),
+        );
+        foreach ($iterator as $file) {
+            if ($file instanceof \SplFileInfo) {
+                $total += $file->getSize();
+            }
+        }
+
+        return $total;
+    }
+}
diff --git a/tests/Unit/Application/Article/ArticleTypeServiceTest.php b/tests/Unit/Application/Article/ArticleTypeServiceTest.php
new file mode 100644
index 0000000..d5e7357
--- /dev/null
+++ b/tests/Unit/Application/Article/ArticleTypeServiceTest.php
@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Application\Article;
+
+use App\Application\Article\ArticleTypeService;
+use App\Domain\Article\ArticleType;
+use App\Domain\Article\AttributeDefinition;
+use App\Domain\Article\AttributeType;
+use App\Domain\Article\Repository\ArticleTypeRepositoryInterface;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+final class ArticleTypeServiceTest extends TestCase
+{
+    private ArticleTypeRepositoryInterface&MockObject $repo;
+    private ArticleTypeService $service;
+
+    protected function setUp(): void
+    {
+        $this->repo = $this->createMock(ArticleTypeRepositoryInterface::class);
+        $this->service = new ArticleTypeService($this->repo);
+    }
+
+    public function test_create_saves_article_type(): void
+    {
+        $this->repo->expects($this->once())->method('save');
+
+        $type = $this->service->create('Notebook');
+
+        $this->assertSame('Notebook', $type->getName());
+    }
+
+    public function test_rename_updates_name(): void
+    {
+        $type = new ArticleType('Notebook');
+        $this->repo->method('findById')->willReturn($type);
+        $this->repo->expects($this->once())->method('save');
+
+        $this->service->rename($type->getId(), 'Laptop');
+
+        $this->assertSame('Laptop', $type->getName());
+    }
+
+    public function test_rename_throws_when_not_found(): void
+    {
+        $this->repo->method('findById')->willReturn(null);
+
+        $this->expectException(\DomainException::class);
+
+        $this->service->rename(\Symfony\Component\Uid\Uuid::v7(), 'X');
+    }
+
+    public function test_add_attribute_links_definition(): void
+    {
+        $type = new ArticleType('Notebook');
+        $def = new AttributeDefinition('RAM', AttributeType::String);
+        $this->repo->method('findById')->willReturn($type);
+        $this->repo->expects($this->once())->method('save');
+
+        $this->service->addAttribute($type->getId(), $def);
+
+        $this->assertCount(1, $type->getAttributeDefinitions());
+    }
+}
diff --git a/tests/Unit/Application/Article/ArticleValidatorTest.php b/tests/Unit/Application/Article/ArticleValidatorTest.php
new file mode 100644
index 0000000..107eebb
--- /dev/null
+++ b/tests/Unit/Application/Article/ArticleValidatorTest.php
@@ -0,0 +1,66 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Application\Article;
+
+use App\Application\Article\ArticleValidator;
+use App\Domain\Article\Article;
+use App\Domain\Article\ArticleCondition;
+use App\Domain\Article\ArticleType;
+use App\Domain\Article\AttributeDefinition;
+use App\Domain\Article\AttributeType;
+use App\Domain\Article\AttributeValue;
+use PHPUnit\Framework\TestCase;
+
+final class ArticleValidatorTest extends TestCase
+{
+    private ArticleValidator $validator;
+    private ArticleType $type;
+    private AttributeDefinition $ramDef;
+    private AttributeDefinition $cpuDef;
+
+    protected function setUp(): void
+    {
+        $this->validator = new ArticleValidator();
+        $this->type = new ArticleType('Notebook');
+        $this->ramDef = new AttributeDefinition('RAM', AttributeType::String);
+        $this->cpuDef = new AttributeDefinition('CPU', AttributeType::String);
+        $this->type->addAttributeDefinition($this->ramDef);
+        $this->type->addAttributeDefinition($this->cpuDef);
+    }
+
+    public function test_valid_when_all_attributes_set(): void
+    {
+        $article = new Article($this->type, 'NB-001', 'INV-001', 1, ArticleCondition::Good);
+        $article->setAttributeValue(new AttributeValue($article, $this->ramDef, '16 GB'));
+        $article->setAttributeValue(new AttributeValue($article, $this->cpuDef, 'Intel i7'));
+
+        $missing = $this->validator->getMissingAttributes($article);
+
+        $this->assertEmpty($missing);
+        $this->assertTrue($this->validator->isValid($article));
+    }
+
+    public function test_returns_missing_attribute_names(): void
+    {
+        $article = new Article($this->type, 'NB-001', 'INV-001', 1, ArticleCondition::Good);
+        $article->setAttributeValue(new AttributeValue($article, $this->ramDef, '16 GB'));
+        // cpuDef not set
+
+        $missing = $this->validator->getMissingAttributes($article);
+
+        $this->assertCount(1, $missing);
+        $this->assertContains('CPU', $missing);
+        $this->assertFalse($this->validator->isValid($article));
+    }
+
+    public function test_all_missing_when_no_values_set(): void
+    {
+        $article = new Article($this->type, 'NB-001', 'INV-001', 1, ArticleCondition::Good);
+
+        $missing = $this->validator->getMissingAttributes($article);
+
+        $this->assertCount(2, $missing);
+    }
+}
diff --git a/tests/Unit/Application/Storage/LocalStorageManagerTest.php b/tests/Unit/Application/Storage/LocalStorageManagerTest.php
new file mode 100644
index 0000000..ba95cce
--- /dev/null
+++ b/tests/Unit/Application/Storage/LocalStorageManagerTest.php
@@ -0,0 +1,88 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Application\Storage;
+
+use App\Domain\Storage\Repository\StoragePathRepositoryInterface;
+use App\Domain\Storage\StoragePath;
+use App\Infrastructure\Storage\LocalStorageManager;
+use PHPUnit\Framework\MockObject\MockObject;
+use PHPUnit\Framework\TestCase;
+
+final class LocalStorageManagerTest extends TestCase
+{
+    private StoragePathRepositoryInterface&MockObject $repo;
+    private LocalStorageManager $manager;
+    private string $tmpFile;
+
+    protected function setUp(): void
+    {
+        $this->repo = $this->createMock(StoragePathRepositoryInterface::class);
+        $this->manager = new LocalStorageManager($this->repo);
+        $this->tmpFile = sys_get_temp_dir().'/test-upload-'.uniqid().'.jpg';
+        file_put_contents($this->tmpFile, str_repeat('x', 100));
+    }
+
+    protected function tearDown(): void
+    {
+        if (file_exists($this->tmpFile)) {
+            unlink($this->tmpFile);
+        }
+    }
+
+    public function test_store_picks_active_path_with_quota(): void
+    {
+        $path = new StoragePath('Main', sys_get_temp_dir().'/storage-test-'.uniqid(), 1_000_000, 10);
+        mkdir($path->getBasePath(), recursive: true);
+
+        $this->repo->expects($this->once())
+            ->method('findActiveSortedByPriority')
+            ->willReturn([$path]);
+
+        $stored = $this->manager->store($this->tmpFile, 'photo.jpg');
+
+        $this->assertSame($path->getId()->toRfc4122(), $stored->storagePath->getId()->toRfc4122());
+        $this->assertStringEndsWith('.jpg', $stored->filename);
+        $this->assertFileExists($path->getBasePath().'/'.$stored->filename);
+
+        // cleanup
+        unlink($path->getBasePath().'/'.$stored->filename);
+        rmdir($path->getBasePath());
+    }
+
+    public function test_throws_when_no_active_path(): void
+    {
+        $this->repo->method('findActiveSortedByPriority')->willReturn([]);
+
+        $this->expectException(\RuntimeException::class);
+        $this->expectExceptionMessage('No active storage path');
+
+        $this->manager->store($this->tmpFile, 'photo.jpg');
+    }
+
+    public function test_skips_full_path_and_uses_next(): void
+    {
+        $fullPath = new StoragePath('Full', sys_get_temp_dir().'/full-'.uniqid(), 50, 20);
+        $okPath = new StoragePath('OK', sys_get_temp_dir().'/ok-'.uniqid(), 1_000_000, 10);
+        mkdir($fullPath->getBasePath(), recursive: true);
+        mkdir($okPath->getBasePath(), recursive: true);
+
+        // fullPath quota (50 bytes) is less than file size (100 bytes) — skip it
+        $this->repo->method('findActiveSortedByPriority')->willReturn([$fullPath, $okPath]);
+
+        $stored = $this->manager->store($this->tmpFile, 'photo.jpg');
+
+        $this->assertSame($okPath->getId()->toRfc4122(), $stored->storagePath->getId()->toRfc4122());
+
+        unlink($okPath->getBasePath().'/'.$stored->filename);
+        rmdir($fullPath->getBasePath());
+        rmdir($okPath->getBasePath());
+    }
+
+    public function test_get_full_path(): void
+    {
+        $path = new StoragePath('Main', '/srv/storage', 1_000_000, 10);
+        $this->assertSame('/srv/storage/photo.jpg', $this->manager->getFullPath($path, 'photo.jpg'));
+    }
+}