feat: Permettre aux enseignants de créer et gérer les devoirs

Les enseignants avaient besoin d'un outil pour créer des devoirs assignés à leurs classes, avec filtrage automatique par matière selon la classe sélectionnée. Le système valide que la date d'échéance tombe un jour ouvrable (lundi-vendredi) et empêche les dates dans le passé. Le domaine modélise le devoir comme un agrégat avec pièces jointes, statut brouillon/publié, et événements métier (création, modification, suppression). Les handlers de notification écoutent ces événements pour les futurs envois aux parents et élèves.
2026-03-12 10:11:06 +01:00
parent 56bc808d85
commit e9efb90f59
51 changed files with 4776 additions and 7 deletions
--- a/backend/config/services.yaml
+++ b/backend/config/services.yaml
@@ -206,6 +206,20 @@ services:
    App\Scolarite\Domain\Repository\TeacherReplacementRepository:
        alias: App\Scolarite\Infrastructure\Persistence\Doctrine\DoctrineTeacherReplacementRepository

+    # Homework (Story 5.1 - Création de devoirs)
+    App\Scolarite\Domain\Repository\HomeworkRepository:
+        alias: App\Scolarite\Infrastructure\Persistence\Doctrine\DoctrineHomeworkRepository
+
+    App\Scolarite\Domain\Service\DueDateValidator:
+        autowire: true
+
+    App\Scolarite\Application\Port\FileStorage:
+        alias: App\Scolarite\Infrastructure\Storage\LocalFileStorage
+
+    App\Scolarite\Infrastructure\Storage\LocalFileStorage:
+        arguments:
+            $storagePath: '%kernel.project_dir%/var/storage'
+
    # Schedule (Story 4.1 - Emploi du temps)
    App\Scolarite\Domain\Repository\ScheduleSlotRepository:
        alias: App\Scolarite\Infrastructure\Persistence\Doctrine\DoctrineScheduleSlotRepository
--- a/backend/migrations/Version20260312002349.php
+++ b/backend/migrations/Version20260312002349.php
@@ -0,0 +1,60 @@
+<?php
+
+declare(strict_types=1);
+
+namespace DoctrineMigrations;
+
+use Doctrine\DBAL\Schema\Schema;
+use Doctrine\Migrations\AbstractMigration;
+
+final class Version20260312002349 extends AbstractMigration
+{
+    public function getDescription(): string
+    {
+        return 'Create homework and homework_attachments tables for Story 5.1';
+    }
+
+    public function up(Schema $schema): void
+    {
+        $this->addSql(<<<'SQL'
+            CREATE TABLE homework (
+                id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+                tenant_id UUID NOT NULL,
+                class_id UUID NOT NULL REFERENCES school_classes(id),
+                subject_id UUID NOT NULL REFERENCES subjects(id),
+                teacher_id UUID NOT NULL REFERENCES users(id),
+                title VARCHAR(255) NOT NULL,
+                description TEXT,
+                due_date DATE NOT NULL,
+                status VARCHAR(20) DEFAULT 'published' NOT NULL,
+                created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+                updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+            )
+            SQL);
+
+        $this->addSql('CREATE INDEX idx_homework_tenant ON homework(tenant_id)');
+        $this->addSql('CREATE INDEX idx_homework_class ON homework(class_id)');
+        $this->addSql('CREATE INDEX idx_homework_due_date ON homework(due_date)');
+        $this->addSql('CREATE INDEX idx_homework_teacher ON homework(teacher_id)');
+
+        $this->addSql(<<<'SQL'
+            CREATE TABLE homework_attachments (
+                id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+                homework_id UUID NOT NULL REFERENCES homework(id) ON DELETE CASCADE,
+                filename VARCHAR(255) NOT NULL,
+                file_path VARCHAR(500) NOT NULL,
+                file_size INT NOT NULL,
+                mime_type VARCHAR(100) NOT NULL,
+                uploaded_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+            )
+            SQL);
+
+        $this->addSql('CREATE INDEX idx_homework_attachments_homework ON homework_attachments(homework_id)');
+    }
+
+    public function down(Schema $schema): void
+    {
+        $this->addSql('DROP TABLE IF EXISTS homework_attachments');
+        $this->addSql('DROP TABLE IF EXISTS homework');
+    }
+}
--- a/backend/src/Scolarite/Application/Command/CreateHomework/CreateHomeworkCommand.php
+++ b/backend/src/Scolarite/Application/Command/CreateHomework/CreateHomeworkCommand.php
@@ -0,0 +1,19 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Application\Command\CreateHomework;
+
+final readonly class CreateHomeworkCommand
+{
+    public function __construct(
+        public string $tenantId,
+        public string $classId,
+        public string $subjectId,
+        public string $teacherId,
+        public string $title,
+        public ?string $description,
+        public string $dueDate,
+    ) {
+    }
+}
--- a/backend/src/Scolarite/Application/Command/CreateHomework/CreateHomeworkHandler.php
+++ b/backend/src/Scolarite/Application/Command/CreateHomework/CreateHomeworkHandler.php
@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Application\Command\CreateHomework;
+
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\Subject\SubjectId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Application\Port\CurrentCalendarProvider;
+use App\Scolarite\Application\Port\EnseignantAffectationChecker;
+use App\Scolarite\Domain\Exception\EnseignantNonAffecteException;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Repository\HomeworkRepository;
+use App\Scolarite\Domain\Service\DueDateValidator;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+#[AsMessageHandler(bus: 'command.bus')]
+final readonly class CreateHomeworkHandler
+{
+    public function __construct(
+        private HomeworkRepository $homeworkRepository,
+        private EnseignantAffectationChecker $affectationChecker,
+        private CurrentCalendarProvider $calendarProvider,
+        private DueDateValidator $dueDateValidator,
+        private Clock $clock,
+    ) {
+    }
+
+    public function __invoke(CreateHomeworkCommand $command): Homework
+    {
+        $tenantId = TenantId::fromString($command->tenantId);
+        $classId = ClassId::fromString($command->classId);
+        $subjectId = SubjectId::fromString($command->subjectId);
+        $teacherId = UserId::fromString($command->teacherId);
+        $now = $this->clock->now();
+
+        if (!$this->affectationChecker->estAffecte($teacherId, $classId, $subjectId, $tenantId)) {
+            throw EnseignantNonAffecteException::pourClasseEtMatiere($teacherId, $classId, $subjectId);
+        }
+
+        $calendar = $this->calendarProvider->forCurrentYear($tenantId);
+        $dueDate = new DateTimeImmutable($command->dueDate);
+        $this->dueDateValidator->valider($dueDate, $now, $calendar);
+
+        $homework = Homework::creer(
+            tenantId: $tenantId,
+            classId: $classId,
+            subjectId: $subjectId,
+            teacherId: $teacherId,
+            title: $command->title,
+            description: $command->description,
+            dueDate: $dueDate,
+            now: $now,
+        );
+
+        $this->homeworkRepository->save($homework);
+
+        return $homework;
+    }
+}
--- a/backend/src/Scolarite/Application/Command/DeleteHomework/DeleteHomeworkCommand.php
+++ b/backend/src/Scolarite/Application/Command/DeleteHomework/DeleteHomeworkCommand.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Application\Command\DeleteHomework;
+
+final readonly class DeleteHomeworkCommand
+{
+    public function __construct(
+        public string $tenantId,
+        public string $homeworkId,
+        public string $teacherId,
+    ) {
+    }
+}
--- a/backend/src/Scolarite/Application/Command/DeleteHomework/DeleteHomeworkHandler.php
+++ b/backend/src/Scolarite/Application/Command/DeleteHomework/DeleteHomeworkHandler.php
@@ -0,0 +1,43 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Application\Command\DeleteHomework;
+
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Domain\Exception\NonProprietaireDuDevoirException;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Repository\HomeworkRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+#[AsMessageHandler(bus: 'command.bus')]
+final readonly class DeleteHomeworkHandler
+{
+    public function __construct(
+        private HomeworkRepository $homeworkRepository,
+        private Clock $clock,
+    ) {
+    }
+
+    public function __invoke(DeleteHomeworkCommand $command): Homework
+    {
+        $tenantId = TenantId::fromString($command->tenantId);
+        $homeworkId = HomeworkId::fromString($command->homeworkId);
+
+        $homework = $this->homeworkRepository->get($homeworkId, $tenantId);
+
+        $teacherId = UserId::fromString($command->teacherId);
+        if ((string) $homework->teacherId !== (string) $teacherId) {
+            throw NonProprietaireDuDevoirException::withId($homeworkId);
+        }
+
+        $homework->supprimer($this->clock->now());
+
+        $this->homeworkRepository->save($homework);
+
+        return $homework;
+    }
+}
--- a/backend/src/Scolarite/Application/Command/UpdateHomework/UpdateHomeworkCommand.php
+++ b/backend/src/Scolarite/Application/Command/UpdateHomework/UpdateHomeworkCommand.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Application\Command\UpdateHomework;
+
+final readonly class UpdateHomeworkCommand
+{
+    public function __construct(
+        public string $tenantId,
+        public string $homeworkId,
+        public string $teacherId,
+        public string $title,
+        public ?string $description,
+        public string $dueDate,
+    ) {
+    }
+}
--- a/backend/src/Scolarite/Application/Command/UpdateHomework/UpdateHomeworkHandler.php
+++ b/backend/src/Scolarite/Application/Command/UpdateHomework/UpdateHomeworkHandler.php
@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Application\Command\UpdateHomework;
+
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Application\Port\CurrentCalendarProvider;
+use App\Scolarite\Domain\Exception\NonProprietaireDuDevoirException;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Repository\HomeworkRepository;
+use App\Scolarite\Domain\Service\DueDateValidator;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+#[AsMessageHandler(bus: 'command.bus')]
+final readonly class UpdateHomeworkHandler
+{
+    public function __construct(
+        private HomeworkRepository $homeworkRepository,
+        private CurrentCalendarProvider $calendarProvider,
+        private DueDateValidator $dueDateValidator,
+        private Clock $clock,
+    ) {
+    }
+
+    public function __invoke(UpdateHomeworkCommand $command): Homework
+    {
+        $tenantId = TenantId::fromString($command->tenantId);
+        $homeworkId = HomeworkId::fromString($command->homeworkId);
+        $now = $this->clock->now();
+
+        $homework = $this->homeworkRepository->get($homeworkId, $tenantId);
+
+        $teacherId = UserId::fromString($command->teacherId);
+        if ((string) $homework->teacherId !== (string) $teacherId) {
+            throw NonProprietaireDuDevoirException::withId($homeworkId);
+        }
+
+        $calendar = $this->calendarProvider->forCurrentYear($tenantId);
+        $dueDate = new DateTimeImmutable($command->dueDate);
+        $this->dueDateValidator->valider($dueDate, $now, $calendar);
+
+        $homework->modifier(
+            title: $command->title,
+            description: $command->description,
+            dueDate: $dueDate,
+            now: $now,
+        );
+
+        $this->homeworkRepository->save($homework);
+
+        return $homework;
+    }
+}
--- a/backend/src/Scolarite/Application/Command/UploadHomeworkAttachment/UploadHomeworkAttachmentCommand.php
+++ b/backend/src/Scolarite/Application/Command/UploadHomeworkAttachment/UploadHomeworkAttachmentCommand.php
@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Application\Command\UploadHomeworkAttachment;
+
+final readonly class UploadHomeworkAttachmentCommand
+{
+    public function __construct(
+        public string $tenantId,
+        public string $homeworkId,
+        public string $filename,
+        public string $mimeType,
+        public int $fileSize,
+        public string $tempFilePath,
+    ) {
+    }
+}
--- a/backend/src/Scolarite/Application/Command/UploadHomeworkAttachment/UploadHomeworkAttachmentHandler.php
+++ b/backend/src/Scolarite/Application/Command/UploadHomeworkAttachment/UploadHomeworkAttachmentHandler.php
@@ -0,0 +1,59 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Application\Command\UploadHomeworkAttachment;
+
+use App\Scolarite\Application\Port\FileStorage;
+use App\Scolarite\Domain\Exception\PieceJointeInvalideException;
+use App\Scolarite\Domain\Model\Homework\HomeworkAttachment;
+use App\Scolarite\Domain\Model\Homework\HomeworkAttachmentId;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Repository\HomeworkRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+
+use function file_get_contents;
+use function sprintf;
+
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+#[AsMessageHandler(bus: 'command.bus')]
+final readonly class UploadHomeworkAttachmentHandler
+{
+    public function __construct(
+        private HomeworkRepository $homeworkRepository,
+        private FileStorage $fileStorage,
+        private Clock $clock,
+    ) {
+    }
+
+    public function __invoke(UploadHomeworkAttachmentCommand $command): HomeworkAttachment
+    {
+        $tenantId = TenantId::fromString($command->tenantId);
+        $homeworkId = HomeworkId::fromString($command->homeworkId);
+
+        // Valider que le devoir existe
+        $this->homeworkRepository->get($homeworkId, $tenantId);
+
+        $attachmentId = HomeworkAttachmentId::generate();
+        $storagePath = sprintf('homework/%s/%s/%s', $command->tenantId, $command->homeworkId, $command->filename);
+
+        $content = file_get_contents($command->tempFilePath);
+
+        if ($content === false) {
+            throw PieceJointeInvalideException::lectureFichierImpossible($command->filename);
+        }
+
+        $this->fileStorage->upload($storagePath, $content, $command->mimeType);
+
+        return new HomeworkAttachment(
+            id: $attachmentId,
+            filename: $command->filename,
+            filePath: $storagePath,
+            fileSize: $command->fileSize,
+            mimeType: $command->mimeType,
+            uploadedAt: $this->clock->now(),
+        );
+    }
+}
--- a/backend/src/Scolarite/Application/Port/FileStorage.php
+++ b/backend/src/Scolarite/Application/Port/FileStorage.php
@@ -0,0 +1,15 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Application\Port;
+
+interface FileStorage
+{
+    /**
+     * @param resource|string $content
+     */
+    public function upload(string $path, mixed $content, string $mimeType): string;
+
+    public function delete(string $path): void;
+}
--- a/backend/src/Scolarite/Domain/Event/DevoirCree.php
+++ b/backend/src/Scolarite/Domain/Event/DevoirCree.php
@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Event;
+
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Shared\Domain\DomainEvent;
+use DateTimeImmutable;
+use Override;
+use Ramsey\Uuid\UuidInterface;
+
+final readonly class DevoirCree implements DomainEvent
+{
+    public function __construct(
+        public HomeworkId $homeworkId,
+        public string $classId,
+        public string $subjectId,
+        public string $teacherId,
+        public string $title,
+        public DateTimeImmutable $dueDate,
+        private DateTimeImmutable $occurredOn,
+    ) {
+    }
+
+    #[Override]
+    public function occurredOn(): DateTimeImmutable
+    {
+        return $this->occurredOn;
+    }
+
+    #[Override]
+    public function aggregateId(): UuidInterface
+    {
+        return $this->homeworkId->value;
+    }
+}
--- a/backend/src/Scolarite/Domain/Event/DevoirModifie.php
+++ b/backend/src/Scolarite/Domain/Event/DevoirModifie.php
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Event;
+
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Shared\Domain\DomainEvent;
+use DateTimeImmutable;
+use Override;
+use Ramsey\Uuid\UuidInterface;
+
+final readonly class DevoirModifie implements DomainEvent
+{
+    public function __construct(
+        public HomeworkId $homeworkId,
+        public string $title,
+        public DateTimeImmutable $dueDate,
+        private DateTimeImmutable $occurredOn,
+    ) {
+    }
+
+    #[Override]
+    public function occurredOn(): DateTimeImmutable
+    {
+        return $this->occurredOn;
+    }
+
+    #[Override]
+    public function aggregateId(): UuidInterface
+    {
+        return $this->homeworkId->value;
+    }
+}
--- a/backend/src/Scolarite/Domain/Event/DevoirSupprime.php
+++ b/backend/src/Scolarite/Domain/Event/DevoirSupprime.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Event;
+
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Shared\Domain\DomainEvent;
+use DateTimeImmutable;
+use Override;
+use Ramsey\Uuid\UuidInterface;
+
+final readonly class DevoirSupprime implements DomainEvent
+{
+    public function __construct(
+        public HomeworkId $homeworkId,
+        private DateTimeImmutable $occurredOn,
+    ) {
+    }
+
+    #[Override]
+    public function occurredOn(): DateTimeImmutable
+    {
+        return $this->occurredOn;
+    }
+
+    #[Override]
+    public function aggregateId(): UuidInterface
+    {
+        return $this->homeworkId->value;
+    }
+}
--- a/backend/src/Scolarite/Domain/Exception/DateEcheanceInvalideException.php
+++ b/backend/src/Scolarite/Domain/Exception/DateEcheanceInvalideException.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Exception;
+
+use DateTimeImmutable;
+use DomainException;
+
+use function sprintf;
+
+final class DateEcheanceInvalideException extends DomainException
+{
+    public static function dansLePasse(DateTimeImmutable $dueDate): self
+    {
+        return new self(sprintf(
+            'La date d\'échéance "%s" doit être dans le futur.',
+            $dueDate->format('Y-m-d'),
+        ));
+    }
+
+    public static function jourBloque(DateTimeImmutable $dueDate, string $raison): self
+    {
+        return new self(sprintf(
+            'La date d\'échéance "%s" est bloquée : %s.',
+            $dueDate->format('Y-m-d'),
+            $raison,
+        ));
+    }
+}
--- a/backend/src/Scolarite/Domain/Exception/DevoirDejaSupprimeException.php
+++ b/backend/src/Scolarite/Domain/Exception/DevoirDejaSupprimeException.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Exception;
+
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use DomainException;
+
+use function sprintf;
+
+final class DevoirDejaSupprimeException extends DomainException
+{
+    public static function withId(HomeworkId $id): self
+    {
+        return new self(sprintf(
+            'Le devoir avec l\'ID "%s" a déjà été supprimé.',
+            $id,
+        ));
+    }
+}
--- a/backend/src/Scolarite/Domain/Exception/HomeworkNotFoundException.php
+++ b/backend/src/Scolarite/Domain/Exception/HomeworkNotFoundException.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Exception;
+
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use DomainException;
+
+use function sprintf;
+
+final class HomeworkNotFoundException extends DomainException
+{
+    public static function withId(HomeworkId $id): self
+    {
+        return new self(sprintf(
+            'Le devoir avec l\'ID "%s" n\'a pas été trouvé.',
+            $id,
+        ));
+    }
+}
--- a/backend/src/Scolarite/Domain/Exception/NonProprietaireDuDevoirException.php
+++ b/backend/src/Scolarite/Domain/Exception/NonProprietaireDuDevoirException.php
@@ -0,0 +1,21 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Exception;
+
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use DomainException;
+
+use function sprintf;
+
+final class NonProprietaireDuDevoirException extends DomainException
+{
+    public static function withId(HomeworkId $id): self
+    {
+        return new self(sprintf(
+            'Vous n\'êtes pas le propriétaire du devoir "%s".',
+            $id,
+        ));
+    }
+}
--- a/backend/src/Scolarite/Domain/Exception/PieceJointeInvalideException.php
+++ b/backend/src/Scolarite/Domain/Exception/PieceJointeInvalideException.php
@@ -0,0 +1,37 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Exception;
+
+use DomainException;
+
+use function sprintf;
+
+final class PieceJointeInvalideException extends DomainException
+{
+    public static function fichierTropGros(int $fileSize, int $maxSize): self
+    {
+        return new self(sprintf(
+            'Le fichier fait %d octets, la taille maximum est de %d octets (10 Mo).',
+            $fileSize,
+            $maxSize,
+        ));
+    }
+
+    public static function typeFichierNonAutorise(string $mimeType): self
+    {
+        return new self(sprintf(
+            'Le type de fichier "%s" n\'est pas autorisé. Types acceptés : PDF, JPEG, PNG.',
+            $mimeType,
+        ));
+    }
+
+    public static function lectureFichierImpossible(string $filename): self
+    {
+        return new self(sprintf(
+            'Impossible de lire le fichier "%s".',
+            $filename,
+        ));
+    }
+}
--- a/backend/src/Scolarite/Domain/Model/Homework/Homework.php
+++ b/backend/src/Scolarite/Domain/Model/Homework/Homework.php
@@ -0,0 +1,144 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Model\Homework;
+
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\Subject\SubjectId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Domain\Event\DevoirCree;
+use App\Scolarite\Domain\Event\DevoirModifie;
+use App\Scolarite\Domain\Event\DevoirSupprime;
+use App\Scolarite\Domain\Exception\DevoirDejaSupprimeException;
+use App\Shared\Domain\AggregateRoot;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+
+final class Homework extends AggregateRoot
+{
+    public private(set) DateTimeImmutable $updatedAt;
+
+    private function __construct(
+        public private(set) HomeworkId $id,
+        public private(set) TenantId $tenantId,
+        public private(set) ClassId $classId,
+        public private(set) SubjectId $subjectId,
+        public private(set) UserId $teacherId,
+        public private(set) string $title,
+        public private(set) ?string $description,
+        public private(set) DateTimeImmutable $dueDate,
+        public private(set) HomeworkStatus $status,
+        public private(set) DateTimeImmutable $createdAt,
+    ) {
+        $this->updatedAt = $createdAt;
+    }
+
+    public static function creer(
+        TenantId $tenantId,
+        ClassId $classId,
+        SubjectId $subjectId,
+        UserId $teacherId,
+        string $title,
+        ?string $description,
+        DateTimeImmutable $dueDate,
+        DateTimeImmutable $now,
+    ): self {
+        $homework = new self(
+            id: HomeworkId::generate(),
+            tenantId: $tenantId,
+            classId: $classId,
+            subjectId: $subjectId,
+            teacherId: $teacherId,
+            title: $title,
+            description: $description,
+            dueDate: $dueDate,
+            status: HomeworkStatus::PUBLISHED,
+            createdAt: $now,
+        );
+
+        $homework->recordEvent(new DevoirCree(
+            homeworkId: $homework->id,
+            classId: (string) $classId,
+            subjectId: (string) $subjectId,
+            teacherId: (string) $teacherId,
+            title: $title,
+            dueDate: $dueDate,
+            occurredOn: $now,
+        ));
+
+        return $homework;
+    }
+
+    public function modifier(
+        string $title,
+        ?string $description,
+        DateTimeImmutable $dueDate,
+        DateTimeImmutable $now,
+    ): void {
+        if ($this->status === HomeworkStatus::DELETED) {
+            throw DevoirDejaSupprimeException::withId($this->id);
+        }
+
+        $this->title = $title;
+        $this->description = $description;
+        $this->dueDate = $dueDate;
+        $this->updatedAt = $now;
+
+        $this->recordEvent(new DevoirModifie(
+            homeworkId: $this->id,
+            title: $title,
+            dueDate: $dueDate,
+            occurredOn: $now,
+        ));
+    }
+
+    public function supprimer(DateTimeImmutable $now): void
+    {
+        if ($this->status === HomeworkStatus::DELETED) {
+            throw DevoirDejaSupprimeException::withId($this->id);
+        }
+
+        $this->status = HomeworkStatus::DELETED;
+        $this->updatedAt = $now;
+
+        $this->recordEvent(new DevoirSupprime(
+            homeworkId: $this->id,
+            occurredOn: $now,
+        ));
+    }
+
+    /**
+     * @internal Pour usage Infrastructure uniquement
+     */
+    public static function reconstitute(
+        HomeworkId $id,
+        TenantId $tenantId,
+        ClassId $classId,
+        SubjectId $subjectId,
+        UserId $teacherId,
+        string $title,
+        ?string $description,
+        DateTimeImmutable $dueDate,
+        HomeworkStatus $status,
+        DateTimeImmutable $createdAt,
+        DateTimeImmutable $updatedAt,
+    ): self {
+        $homework = new self(
+            id: $id,
+            tenantId: $tenantId,
+            classId: $classId,
+            subjectId: $subjectId,
+            teacherId: $teacherId,
+            title: $title,
+            description: $description,
+            dueDate: $dueDate,
+            status: $status,
+            createdAt: $createdAt,
+        );
+
+        $homework->updatedAt = $updatedAt;
+
+        return $homework;
+    }
+}
--- a/backend/src/Scolarite/Domain/Model/Homework/HomeworkAttachment.php
+++ b/backend/src/Scolarite/Domain/Model/Homework/HomeworkAttachment.php
@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Model\Homework;
+
+use App\Scolarite\Domain\Exception\PieceJointeInvalideException;
+use DateTimeImmutable;
+
+use function in_array;
+
+final class HomeworkAttachment
+{
+    private const int MAX_FILE_SIZE = 10 * 1024 * 1024; // 10 Mo
+
+    private const array ALLOWED_MIME_TYPES = [
+        'application/pdf',
+        'image/jpeg',
+        'image/png',
+    ];
+
+    public function __construct(
+        public private(set) HomeworkAttachmentId $id,
+        public private(set) string $filename,
+        public private(set) string $filePath,
+        public private(set) int $fileSize {
+            set(int $fileSize) {
+                if ($fileSize > self::MAX_FILE_SIZE) {
+                    throw PieceJointeInvalideException::fichierTropGros($fileSize, self::MAX_FILE_SIZE);
+                }
+                $this->fileSize = $fileSize;
+            }
+        },
+        public private(set) string $mimeType {
+            set(string $mimeType) {
+                if (!in_array($mimeType, self::ALLOWED_MIME_TYPES, true)) {
+                    throw PieceJointeInvalideException::typeFichierNonAutorise($mimeType);
+                }
+                $this->mimeType = $mimeType;
+            }
+        },
+        public private(set) DateTimeImmutable $uploadedAt,
+    ) {
+    }
+}
--- a/backend/src/Scolarite/Domain/Model/Homework/HomeworkAttachmentId.php
+++ b/backend/src/Scolarite/Domain/Model/Homework/HomeworkAttachmentId.php
@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Model\Homework;
+
+use App\Shared\Domain\EntityId;
+
+final readonly class HomeworkAttachmentId extends EntityId
+{
+}
--- a/backend/src/Scolarite/Domain/Model/Homework/HomeworkId.php
+++ b/backend/src/Scolarite/Domain/Model/Homework/HomeworkId.php
@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Model\Homework;
+
+use App\Shared\Domain\EntityId;
+
+final readonly class HomeworkId extends EntityId
+{
+}
--- a/backend/src/Scolarite/Domain/Model/Homework/HomeworkStatus.php
+++ b/backend/src/Scolarite/Domain/Model/Homework/HomeworkStatus.php
@@ -0,0 +1,11 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Model\Homework;
+
+enum HomeworkStatus: string
+{
+    case PUBLISHED = 'published';
+    case DELETED = 'deleted';
+}
--- a/backend/src/Scolarite/Domain/Repository/HomeworkRepository.php
+++ b/backend/src/Scolarite/Domain/Repository/HomeworkRepository.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Repository;
+
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Domain\Exception\HomeworkNotFoundException;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Shared\Domain\Tenant\TenantId;
+
+interface HomeworkRepository
+{
+    public function save(Homework $homework): void;
+
+    /** @throws HomeworkNotFoundException */
+    public function get(HomeworkId $id, TenantId $tenantId): Homework;
+
+    public function findById(HomeworkId $id, TenantId $tenantId): ?Homework;
+
+    /** @return array<Homework> */
+    public function findByTeacher(UserId $teacherId, TenantId $tenantId): array;
+
+    /** @return array<Homework> */
+    public function findByClass(ClassId $classId, TenantId $tenantId): array;
+
+    public function delete(HomeworkId $id, TenantId $tenantId): void;
+}
--- a/backend/src/Scolarite/Domain/Service/DueDateValidator.php
+++ b/backend/src/Scolarite/Domain/Service/DueDateValidator.php
@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Domain\Service;
+
+use App\Administration\Domain\Model\SchoolCalendar\SchoolCalendar;
+use App\Scolarite\Domain\Exception\DateEcheanceInvalideException;
+use DateTimeImmutable;
+
+final readonly class DueDateValidator
+{
+    public function valider(DateTimeImmutable $dueDate, DateTimeImmutable $now, SchoolCalendar $calendar): void
+    {
+        $tomorrow = $now->modify('+1 day')->setTime(0, 0);
+
+        if ($dueDate < $tomorrow) {
+            throw DateEcheanceInvalideException::dansLePasse($dueDate);
+        }
+
+        if (!$calendar->estJourOuvre($dueDate)) {
+            $entry = $calendar->trouverEntreePourDate($dueDate);
+            $raison = $entry !== null ? $entry->label : 'weekend';
+
+            throw DateEcheanceInvalideException::jourBloque($dueDate, $raison);
+        }
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Api/Processor/CreateHomeworkProcessor.php
+++ b/backend/src/Scolarite/Infrastructure/Api/Processor/CreateHomeworkProcessor.php
@@ -0,0 +1,76 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Api\Processor;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Administration\Infrastructure\Security\SecurityUser;
+use App\Scolarite\Application\Command\CreateHomework\CreateHomeworkCommand;
+use App\Scolarite\Application\Command\CreateHomework\CreateHomeworkHandler;
+use App\Scolarite\Domain\Exception\DateEcheanceInvalideException;
+use App\Scolarite\Domain\Exception\EnseignantNonAffecteException;
+use App\Scolarite\Infrastructure\Api\Resource\HomeworkResource;
+use App\Shared\Infrastructure\Tenant\TenantContext;
+use Override;
+use Ramsey\Uuid\Exception\InvalidUuidStringException;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
+use Symfony\Component\Messenger\MessageBusInterface;
+
+/**
+ * @implements ProcessorInterface<HomeworkResource, HomeworkResource>
+ */
+final readonly class CreateHomeworkProcessor implements ProcessorInterface
+{
+    public function __construct(
+        private CreateHomeworkHandler $handler,
+        private TenantContext $tenantContext,
+        private MessageBusInterface $eventBus,
+        private Security $security,
+    ) {
+    }
+
+    /**
+     * @param HomeworkResource $data
+     */
+    #[Override]
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): HomeworkResource
+    {
+        if (!$this->tenantContext->hasTenant()) {
+            throw new UnauthorizedHttpException('Bearer', 'Tenant non défini.');
+        }
+
+        $user = $this->security->getUser();
+
+        if (!$user instanceof SecurityUser) {
+            throw new UnauthorizedHttpException('Bearer', 'Authentification requise.');
+        }
+
+        try {
+            $command = new CreateHomeworkCommand(
+                tenantId: (string) $this->tenantContext->getCurrentTenantId(),
+                classId: $data->classId ?? '',
+                subjectId: $data->subjectId ?? '',
+                teacherId: $user->userId(),
+                title: $data->title ?? '',
+                description: $data->description,
+                dueDate: $data->dueDate ?? '',
+            );
+
+            $homework = ($this->handler)($command);
+
+            foreach ($homework->pullDomainEvents() as $event) {
+                $this->eventBus->dispatch($event);
+            }
+
+            return HomeworkResource::fromDomain($homework);
+        } catch (EnseignantNonAffecteException|DateEcheanceInvalideException $e) {
+            throw new BadRequestHttpException($e->getMessage());
+        } catch (InvalidUuidStringException $e) {
+            throw new BadRequestHttpException('UUID invalide : ' . $e->getMessage());
+        }
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Api/Processor/DeleteHomeworkProcessor.php
+++ b/backend/src/Scolarite/Infrastructure/Api/Processor/DeleteHomeworkProcessor.php
@@ -0,0 +1,79 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Api\Processor;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Administration\Infrastructure\Security\SecurityUser;
+use App\Scolarite\Application\Command\DeleteHomework\DeleteHomeworkCommand;
+use App\Scolarite\Application\Command\DeleteHomework\DeleteHomeworkHandler;
+use App\Scolarite\Domain\Exception\DevoirDejaSupprimeException;
+use App\Scolarite\Domain\Exception\HomeworkNotFoundException;
+use App\Scolarite\Domain\Exception\NonProprietaireDuDevoirException;
+use App\Scolarite\Infrastructure\Api\Resource\HomeworkResource;
+use App\Shared\Infrastructure\Tenant\TenantContext;
+use Override;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
+use Symfony\Component\Messenger\MessageBusInterface;
+
+/**
+ * @implements ProcessorInterface<HomeworkResource, HomeworkResource>
+ */
+final readonly class DeleteHomeworkProcessor implements ProcessorInterface
+{
+    public function __construct(
+        private DeleteHomeworkHandler $handler,
+        private TenantContext $tenantContext,
+        private MessageBusInterface $eventBus,
+        private Security $security,
+    ) {
+    }
+
+    /**
+     * @param HomeworkResource $data
+     */
+    #[Override]
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): HomeworkResource
+    {
+        if (!$this->tenantContext->hasTenant()) {
+            throw new UnauthorizedHttpException('Bearer', 'Tenant non défini.');
+        }
+
+        $user = $this->security->getUser();
+
+        if (!$user instanceof SecurityUser) {
+            throw new UnauthorizedHttpException('Bearer', 'Authentification requise.');
+        }
+
+        /** @var string $id */
+        $id = $uriVariables['id'];
+
+        try {
+            $command = new DeleteHomeworkCommand(
+                tenantId: (string) $this->tenantContext->getCurrentTenantId(),
+                homeworkId: $id,
+                teacherId: $user->userId(),
+            );
+
+            $homework = ($this->handler)($command);
+
+            foreach ($homework->pullDomainEvents() as $event) {
+                $this->eventBus->dispatch($event);
+            }
+
+            return HomeworkResource::fromDomain($homework);
+        } catch (HomeworkNotFoundException $e) {
+            throw new NotFoundHttpException($e->getMessage());
+        } catch (NonProprietaireDuDevoirException $e) {
+            throw new AccessDeniedHttpException($e->getMessage());
+        } catch (DevoirDejaSupprimeException $e) {
+            throw new BadRequestHttpException($e->getMessage());
+        }
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Api/Processor/UpdateHomeworkProcessor.php
+++ b/backend/src/Scolarite/Infrastructure/Api/Processor/UpdateHomeworkProcessor.php
@@ -0,0 +1,83 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Api\Processor;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProcessorInterface;
+use App\Administration\Infrastructure\Security\SecurityUser;
+use App\Scolarite\Application\Command\UpdateHomework\UpdateHomeworkCommand;
+use App\Scolarite\Application\Command\UpdateHomework\UpdateHomeworkHandler;
+use App\Scolarite\Domain\Exception\DateEcheanceInvalideException;
+use App\Scolarite\Domain\Exception\DevoirDejaSupprimeException;
+use App\Scolarite\Domain\Exception\HomeworkNotFoundException;
+use App\Scolarite\Domain\Exception\NonProprietaireDuDevoirException;
+use App\Scolarite\Infrastructure\Api\Resource\HomeworkResource;
+use App\Shared\Infrastructure\Tenant\TenantContext;
+use Override;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\BadRequestHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
+use Symfony\Component\Messenger\MessageBusInterface;
+
+/**
+ * @implements ProcessorInterface<HomeworkResource, HomeworkResource>
+ */
+final readonly class UpdateHomeworkProcessor implements ProcessorInterface
+{
+    public function __construct(
+        private UpdateHomeworkHandler $handler,
+        private TenantContext $tenantContext,
+        private MessageBusInterface $eventBus,
+        private Security $security,
+    ) {
+    }
+
+    /**
+     * @param HomeworkResource $data
+     */
+    #[Override]
+    public function process(mixed $data, Operation $operation, array $uriVariables = [], array $context = []): HomeworkResource
+    {
+        if (!$this->tenantContext->hasTenant()) {
+            throw new UnauthorizedHttpException('Bearer', 'Tenant non défini.');
+        }
+
+        $user = $this->security->getUser();
+
+        if (!$user instanceof SecurityUser) {
+            throw new UnauthorizedHttpException('Bearer', 'Authentification requise.');
+        }
+
+        /** @var string $id */
+        $id = $uriVariables['id'];
+
+        try {
+            $command = new UpdateHomeworkCommand(
+                tenantId: (string) $this->tenantContext->getCurrentTenantId(),
+                homeworkId: $id,
+                teacherId: $user->userId(),
+                title: $data->title ?? '',
+                description: $data->description,
+                dueDate: $data->dueDate ?? '',
+            );
+
+            $homework = ($this->handler)($command);
+
+            foreach ($homework->pullDomainEvents() as $event) {
+                $this->eventBus->dispatch($event);
+            }
+
+            return HomeworkResource::fromDomain($homework);
+        } catch (HomeworkNotFoundException $e) {
+            throw new NotFoundHttpException($e->getMessage());
+        } catch (NonProprietaireDuDevoirException $e) {
+            throw new AccessDeniedHttpException($e->getMessage());
+        } catch (DateEcheanceInvalideException|DevoirDejaSupprimeException $e) {
+            throw new BadRequestHttpException($e->getMessage());
+        }
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Api/Provider/HomeworkCollectionProvider.php
+++ b/backend/src/Scolarite/Infrastructure/Api/Provider/HomeworkCollectionProvider.php
@@ -0,0 +1,77 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Api\Provider;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProviderInterface;
+use App\Administration\Domain\Model\User\UserId;
+use App\Administration\Domain\Repository\ClassRepository;
+use App\Administration\Domain\Repository\SubjectRepository;
+use App\Administration\Infrastructure\Security\SecurityUser;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Repository\HomeworkRepository;
+use App\Scolarite\Infrastructure\Api\Resource\HomeworkResource;
+use App\Shared\Infrastructure\Tenant\TenantContext;
+
+use function array_map;
+
+use Override;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
+
+/**
+ * @implements ProviderInterface<HomeworkResource>
+ */
+final readonly class HomeworkCollectionProvider implements ProviderInterface
+{
+    public function __construct(
+        private HomeworkRepository $homeworkRepository,
+        private TenantContext $tenantContext,
+        private Security $security,
+        private ClassRepository $classRepository,
+        private SubjectRepository $subjectRepository,
+    ) {
+    }
+
+    /** @return array<HomeworkResource> */
+    #[Override]
+    public function provide(Operation $operation, array $uriVariables = [], array $context = []): array
+    {
+        if (!$this->tenantContext->hasTenant()) {
+            throw new UnauthorizedHttpException('Bearer', 'Tenant non défini.');
+        }
+
+        $user = $this->security->getUser();
+
+        if (!$user instanceof SecurityUser) {
+            throw new UnauthorizedHttpException('Bearer', 'Authentification requise.');
+        }
+
+        $tenantId = $this->tenantContext->getCurrentTenantId();
+        $teacherId = UserId::fromString($user->userId());
+
+        $homeworks = $this->homeworkRepository->findByTeacher($teacherId, $tenantId);
+
+        return array_map(fn (Homework $homework) => HomeworkResource::fromDomain(
+            $homework,
+            $this->resolveClassName($homework),
+            $this->resolveSubjectName($homework),
+        ), $homeworks);
+    }
+
+    private function resolveClassName(Homework $homework): ?string
+    {
+        $class = $this->classRepository->findById($homework->classId);
+
+        return $class !== null ? (string) $class->name : null;
+    }
+
+    private function resolveSubjectName(Homework $homework): ?string
+    {
+        $subject = $this->subjectRepository->findById($homework->subjectId);
+
+        return $subject !== null ? (string) $subject->name : null;
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Api/Provider/HomeworkItemProvider.php
+++ b/backend/src/Scolarite/Infrastructure/Api/Provider/HomeworkItemProvider.php
@@ -0,0 +1,74 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Api\Provider;
+
+use ApiPlatform\Metadata\Operation;
+use ApiPlatform\State\ProviderInterface;
+use App\Administration\Domain\Repository\ClassRepository;
+use App\Administration\Domain\Repository\SubjectRepository;
+use App\Administration\Infrastructure\Security\SecurityUser;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Repository\HomeworkRepository;
+use App\Scolarite\Infrastructure\Api\Resource\HomeworkResource;
+use App\Shared\Infrastructure\Tenant\TenantContext;
+use Override;
+use Symfony\Bundle\SecurityBundle\Security;
+use Symfony\Component\HttpKernel\Exception\AccessDeniedHttpException;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+use Symfony\Component\HttpKernel\Exception\UnauthorizedHttpException;
+
+/**
+ * @implements ProviderInterface<HomeworkResource>
+ */
+final readonly class HomeworkItemProvider implements ProviderInterface
+{
+    public function __construct(
+        private HomeworkRepository $homeworkRepository,
+        private TenantContext $tenantContext,
+        private Security $security,
+        private ClassRepository $classRepository,
+        private SubjectRepository $subjectRepository,
+    ) {
+    }
+
+    #[Override]
+    public function provide(Operation $operation, array $uriVariables = [], array $context = []): HomeworkResource
+    {
+        if (!$this->tenantContext->hasTenant()) {
+            throw new UnauthorizedHttpException('Bearer', 'Tenant non défini.');
+        }
+
+        $user = $this->security->getUser();
+
+        if (!$user instanceof SecurityUser) {
+            throw new UnauthorizedHttpException('Bearer', 'Authentification requise.');
+        }
+
+        /** @var string $id */
+        $id = $uriVariables['id'];
+
+        $homework = $this->homeworkRepository->findById(
+            HomeworkId::fromString($id),
+            $this->tenantContext->getCurrentTenantId(),
+        );
+
+        if ($homework === null) {
+            throw new NotFoundHttpException('Devoir non trouvé.');
+        }
+
+        if ((string) $homework->teacherId !== $user->userId()) {
+            throw new AccessDeniedHttpException('Vous n\'êtes pas le propriétaire de ce devoir.');
+        }
+
+        $class = $this->classRepository->findById($homework->classId);
+        $subject = $this->subjectRepository->findById($homework->subjectId);
+
+        return HomeworkResource::fromDomain(
+            $homework,
+            $class !== null ? (string) $class->name : null,
+            $subject !== null ? (string) $subject->name : null,
+        );
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Api/Resource/HomeworkResource.php
+++ b/backend/src/Scolarite/Infrastructure/Api/Resource/HomeworkResource.php
@@ -0,0 +1,112 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Api\Resource;
+
+use ApiPlatform\Metadata\ApiProperty;
+use ApiPlatform\Metadata\ApiResource;
+use ApiPlatform\Metadata\Delete;
+use ApiPlatform\Metadata\Get;
+use ApiPlatform\Metadata\GetCollection;
+use ApiPlatform\Metadata\Patch;
+use ApiPlatform\Metadata\Post;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Infrastructure\Api\Processor\CreateHomeworkProcessor;
+use App\Scolarite\Infrastructure\Api\Processor\DeleteHomeworkProcessor;
+use App\Scolarite\Infrastructure\Api\Processor\UpdateHomeworkProcessor;
+use App\Scolarite\Infrastructure\Api\Provider\HomeworkCollectionProvider;
+use App\Scolarite\Infrastructure\Api\Provider\HomeworkItemProvider;
+use DateTimeImmutable;
+use Symfony\Component\Validator\Constraints as Assert;
+
+#[ApiResource(
+    shortName: 'Homework',
+    operations: [
+        new GetCollection(
+            uriTemplate: '/homework',
+            provider: HomeworkCollectionProvider::class,
+            name: 'get_homework_list',
+        ),
+        new Get(
+            uriTemplate: '/homework/{id}',
+            provider: HomeworkItemProvider::class,
+            name: 'get_homework',
+        ),
+        new Post(
+            uriTemplate: '/homework',
+            processor: CreateHomeworkProcessor::class,
+            validationContext: ['groups' => ['Default', 'create']],
+            name: 'create_homework',
+        ),
+        new Patch(
+            uriTemplate: '/homework/{id}',
+            provider: HomeworkItemProvider::class,
+            processor: UpdateHomeworkProcessor::class,
+            validationContext: ['groups' => ['Default', 'update']],
+            name: 'update_homework',
+        ),
+        new Delete(
+            uriTemplate: '/homework/{id}',
+            provider: HomeworkItemProvider::class,
+            processor: DeleteHomeworkProcessor::class,
+            name: 'delete_homework',
+        ),
+    ],
+)]
+final class HomeworkResource
+{
+    #[ApiProperty(identifier: true)]
+    public ?string $id = null;
+
+    #[Assert\NotBlank(message: 'La classe est requise.', groups: ['create'])]
+    #[Assert\Uuid(message: 'L\'identifiant de la classe doit être un UUID valide.', groups: ['create'])]
+    public ?string $classId = null;
+
+    #[Assert\NotBlank(message: 'La matière est requise.', groups: ['create'])]
+    #[Assert\Uuid(message: 'L\'identifiant de la matière doit être un UUID valide.', groups: ['create'])]
+    public ?string $subjectId = null;
+
+    public ?string $teacherId = null;
+
+    #[Assert\NotBlank(message: 'Le titre est requis.', groups: ['create', 'update'])]
+    #[Assert\Length(max: 255, maxMessage: 'Le titre ne peut pas dépasser 255 caractères.')]
+    public ?string $title = null;
+
+    public ?string $description = null;
+
+    #[Assert\NotBlank(message: 'La date d\'échéance est requise.', groups: ['create', 'update'])]
+    public ?string $dueDate = null;
+
+    public ?string $status = null;
+
+    public ?string $className = null;
+
+    public ?string $subjectName = null;
+
+    public ?DateTimeImmutable $createdAt = null;
+
+    public ?DateTimeImmutable $updatedAt = null;
+
+    public static function fromDomain(
+        Homework $homework,
+        ?string $className = null,
+        ?string $subjectName = null,
+    ): self {
+        $resource = new self();
+        $resource->id = (string) $homework->id;
+        $resource->classId = (string) $homework->classId;
+        $resource->subjectId = (string) $homework->subjectId;
+        $resource->teacherId = (string) $homework->teacherId;
+        $resource->title = $homework->title;
+        $resource->description = $homework->description;
+        $resource->dueDate = $homework->dueDate->format('Y-m-d');
+        $resource->status = $homework->status->value;
+        $resource->className = $className;
+        $resource->subjectName = $subjectName;
+        $resource->createdAt = $homework->createdAt;
+        $resource->updatedAt = $homework->updatedAt;
+
+        return $resource;
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Messaging/OnDevoirCreeHandler.php
+++ b/backend/src/Scolarite/Infrastructure/Messaging/OnDevoirCreeHandler.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Messaging;
+
+use App\Scolarite\Domain\Event\DevoirCree;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+/**
+ * Réagit à la création d'un devoir.
+ *
+ * @todo #0 Implémenter la notification push/email aux élèves et parents (dépend de Epic 9)
+ */
+#[AsMessageHandler(bus: 'event.bus')]
+final readonly class OnDevoirCreeHandler
+{
+    public function __construct(
+        private LoggerInterface $logger,
+    ) {
+    }
+
+    public function __invoke(DevoirCree $event): void
+    {
+        $this->logger->info('Nouveau devoir créé — notification prévue', [
+            'homework_id' => (string) $event->homeworkId,
+            'class_id' => $event->classId,
+            'subject_id' => $event->subjectId,
+            'teacher_id' => $event->teacherId,
+            'title' => $event->title,
+            'due_date' => $event->dueDate->format('Y-m-d'),
+        ]);
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Messaging/OnDevoirModifieHandler.php
+++ b/backend/src/Scolarite/Infrastructure/Messaging/OnDevoirModifieHandler.php
@@ -0,0 +1,32 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Messaging;
+
+use App\Scolarite\Domain\Event\DevoirModifie;
+use Psr\Log\LoggerInterface;
+use Symfony\Component\Messenger\Attribute\AsMessageHandler;
+
+/**
+ * Réagit à la modification d'un devoir publié.
+ *
+ * @todo #0 Implémenter la notification push/email aux concernés (dépend de Epic 9)
+ */
+#[AsMessageHandler(bus: 'event.bus')]
+final readonly class OnDevoirModifieHandler
+{
+    public function __construct(
+        private LoggerInterface $logger,
+    ) {
+    }
+
+    public function __invoke(DevoirModifie $event): void
+    {
+        $this->logger->info('Devoir modifié — notification prévue', [
+            'homework_id' => (string) $event->homeworkId,
+            'title' => $event->title,
+            'due_date' => $event->dueDate->format('Y-m-d'),
+        ]);
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Persistence/Doctrine/DoctrineHomeworkRepository.php
+++ b/backend/src/Scolarite/Infrastructure/Persistence/Doctrine/DoctrineHomeworkRepository.php
@@ -0,0 +1,172 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Persistence\Doctrine;
+
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\Subject\SubjectId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Domain\Exception\HomeworkNotFoundException;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Model\Homework\HomeworkStatus;
+use App\Scolarite\Domain\Repository\HomeworkRepository;
+use App\Shared\Domain\Tenant\TenantId;
+
+use function array_map;
+
+use DateTimeImmutable;
+use Doctrine\DBAL\Connection;
+use Override;
+
+final readonly class DoctrineHomeworkRepository implements HomeworkRepository
+{
+    public function __construct(
+        private Connection $connection,
+    ) {
+    }
+
+    #[Override]
+    public function save(Homework $homework): void
+    {
+        $this->connection->executeStatement(
+            'INSERT INTO homework (id, tenant_id, class_id, subject_id, teacher_id, title, description, due_date, status, created_at, updated_at)
+             VALUES (:id, :tenant_id, :class_id, :subject_id, :teacher_id, :title, :description, :due_date, :status, :created_at, :updated_at)
+             ON CONFLICT (id) DO UPDATE SET
+                 title = EXCLUDED.title,
+                 description = EXCLUDED.description,
+                 due_date = EXCLUDED.due_date,
+                 status = EXCLUDED.status,
+                 updated_at = EXCLUDED.updated_at',
+            [
+                'id' => (string) $homework->id,
+                'tenant_id' => (string) $homework->tenantId,
+                'class_id' => (string) $homework->classId,
+                'subject_id' => (string) $homework->subjectId,
+                'teacher_id' => (string) $homework->teacherId,
+                'title' => $homework->title,
+                'description' => $homework->description,
+                'due_date' => $homework->dueDate->format('Y-m-d'),
+                'status' => $homework->status->value,
+                'created_at' => $homework->createdAt->format(DateTimeImmutable::ATOM),
+                'updated_at' => $homework->updatedAt->format(DateTimeImmutable::ATOM),
+            ],
+        );
+    }
+
+    #[Override]
+    public function get(HomeworkId $id, TenantId $tenantId): Homework
+    {
+        $homework = $this->findById($id, $tenantId);
+
+        if ($homework === null) {
+            throw HomeworkNotFoundException::withId($id);
+        }
+
+        return $homework;
+    }
+
+    #[Override]
+    public function findById(HomeworkId $id, TenantId $tenantId): ?Homework
+    {
+        $row = $this->connection->fetchAssociative(
+            'SELECT * FROM homework WHERE id = :id AND tenant_id = :tenant_id',
+            ['id' => (string) $id, 'tenant_id' => (string) $tenantId],
+        );
+
+        if ($row === false) {
+            return null;
+        }
+
+        return $this->hydrate($row);
+    }
+
+    #[Override]
+    public function findByTeacher(UserId $teacherId, TenantId $tenantId): array
+    {
+        $rows = $this->connection->fetchAllAssociative(
+            'SELECT * FROM homework
+             WHERE teacher_id = :teacher_id
+             AND tenant_id = :tenant_id
+             AND status != :deleted
+             ORDER BY due_date ASC',
+            [
+                'teacher_id' => (string) $teacherId,
+                'tenant_id' => (string) $tenantId,
+                'deleted' => HomeworkStatus::DELETED->value,
+            ],
+        );
+
+        return array_map($this->hydrate(...), $rows);
+    }
+
+    #[Override]
+    public function findByClass(ClassId $classId, TenantId $tenantId): array
+    {
+        $rows = $this->connection->fetchAllAssociative(
+            'SELECT * FROM homework
+             WHERE class_id = :class_id
+             AND tenant_id = :tenant_id
+             AND status != :deleted
+             ORDER BY due_date ASC',
+            [
+                'class_id' => (string) $classId,
+                'tenant_id' => (string) $tenantId,
+                'deleted' => HomeworkStatus::DELETED->value,
+            ],
+        );
+
+        return array_map($this->hydrate(...), $rows);
+    }
+
+    #[Override]
+    public function delete(HomeworkId $id, TenantId $tenantId): void
+    {
+        $this->connection->executeStatement(
+            'DELETE FROM homework WHERE id = :id AND tenant_id = :tenant_id',
+            ['id' => (string) $id, 'tenant_id' => (string) $tenantId],
+        );
+    }
+
+    /** @param array<string, mixed> $row */
+    private function hydrate(array $row): Homework
+    {
+        /** @var string $id */
+        $id = $row['id'];
+        /** @var string $tenantId */
+        $tenantId = $row['tenant_id'];
+        /** @var string $classId */
+        $classId = $row['class_id'];
+        /** @var string $subjectId */
+        $subjectId = $row['subject_id'];
+        /** @var string $teacherId */
+        $teacherId = $row['teacher_id'];
+        /** @var string $title */
+        $title = $row['title'];
+        /** @var string|null $description */
+        $description = $row['description'];
+        /** @var string $dueDate */
+        $dueDate = $row['due_date'];
+        /** @var string $status */
+        $status = $row['status'];
+        /** @var string $createdAt */
+        $createdAt = $row['created_at'];
+        /** @var string $updatedAt */
+        $updatedAt = $row['updated_at'];
+
+        return Homework::reconstitute(
+            id: HomeworkId::fromString($id),
+            tenantId: TenantId::fromString($tenantId),
+            classId: ClassId::fromString($classId),
+            subjectId: SubjectId::fromString($subjectId),
+            teacherId: UserId::fromString($teacherId),
+            title: $title,
+            description: $description,
+            dueDate: new DateTimeImmutable($dueDate),
+            status: HomeworkStatus::from($status),
+            createdAt: new DateTimeImmutable($createdAt),
+            updatedAt: new DateTimeImmutable($updatedAt),
+        );
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Persistence/InMemory/InMemoryHomeworkRepository.php
+++ b/backend/src/Scolarite/Infrastructure/Persistence/InMemory/InMemoryHomeworkRepository.php
@@ -0,0 +1,87 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Persistence\InMemory;
+
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Domain\Exception\HomeworkNotFoundException;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Model\Homework\HomeworkStatus;
+use App\Scolarite\Domain\Repository\HomeworkRepository;
+use App\Shared\Domain\Tenant\TenantId;
+
+use function array_filter;
+use function array_values;
+
+use Override;
+
+final class InMemoryHomeworkRepository implements HomeworkRepository
+{
+    /** @var array<string, Homework> */
+    private array $byId = [];
+
+    #[Override]
+    public function save(Homework $homework): void
+    {
+        $this->byId[(string) $homework->id] = $homework;
+    }
+
+    #[Override]
+    public function get(HomeworkId $id, TenantId $tenantId): Homework
+    {
+        $homework = $this->findById($id, $tenantId);
+
+        if ($homework === null) {
+            throw HomeworkNotFoundException::withId($id);
+        }
+
+        return $homework;
+    }
+
+    #[Override]
+    public function findById(HomeworkId $id, TenantId $tenantId): ?Homework
+    {
+        $homework = $this->byId[(string) $id] ?? null;
+
+        if ($homework === null || !$homework->tenantId->equals($tenantId)) {
+            return null;
+        }
+
+        return $homework;
+    }
+
+    #[Override]
+    public function findByTeacher(UserId $teacherId, TenantId $tenantId): array
+    {
+        return array_values(array_filter(
+            $this->byId,
+            static fn (Homework $h): bool => $h->teacherId->equals($teacherId)
+                && $h->tenantId->equals($tenantId)
+                && $h->status !== HomeworkStatus::DELETED,
+        ));
+    }
+
+    #[Override]
+    public function findByClass(ClassId $classId, TenantId $tenantId): array
+    {
+        return array_values(array_filter(
+            $this->byId,
+            static fn (Homework $h): bool => $h->classId->equals($classId)
+                && $h->tenantId->equals($tenantId)
+                && $h->status !== HomeworkStatus::DELETED,
+        ));
+    }
+
+    #[Override]
+    public function delete(HomeworkId $id, TenantId $tenantId): void
+    {
+        $key = (string) $id;
+
+        if (isset($this->byId[$key]) && $this->byId[$key]->tenantId->equals($tenantId)) {
+            unset($this->byId[$key]);
+        }
+    }
+}
--- a/backend/src/Scolarite/Infrastructure/Storage/LocalFileStorage.php
+++ b/backend/src/Scolarite/Infrastructure/Storage/LocalFileStorage.php
@@ -0,0 +1,53 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Scolarite\Infrastructure\Storage;
+
+use App\Scolarite\Application\Port\FileStorage;
+
+use function dirname;
+use function file_put_contents;
+use function is_dir;
+use function is_file;
+use function is_string;
+use function mkdir;
+
+use Override;
+
+use function unlink;
+
+final readonly class LocalFileStorage implements FileStorage
+{
+    public function __construct(
+        private string $storagePath,
+    ) {
+    }
+
+    #[Override]
+    public function upload(string $path, mixed $content, string $mimeType): string
+    {
+        $fullPath = $this->storagePath . '/' . $path;
+        $dir = dirname($fullPath);
+
+        if (!is_dir($dir)) {
+            mkdir($dir, 0o755, true);
+        }
+
+        $data = is_string($content) ? $content : '';
+
+        file_put_contents($fullPath, $data);
+
+        return $path;
+    }
+
+    #[Override]
+    public function delete(string $path): void
+    {
+        $fullPath = $this->storagePath . '/' . $path;
+
+        if (is_file($fullPath)) {
+            unlink($fullPath);
+        }
+    }
+}
--- a/backend/tests/Functional/Scolarite/Api/HomeworkEndpointsTest.php
+++ b/backend/tests/Functional/Scolarite/Api/HomeworkEndpointsTest.php
@@ -0,0 +1,428 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Functional\Scolarite\Api;
+
+use ApiPlatform\Symfony\Bundle\Test\ApiTestCase;
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\Subject\SubjectId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Administration\Infrastructure\Security\SecurityUser;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Model\Homework\HomeworkStatus;
+use App\Scolarite\Domain\Repository\HomeworkRepository;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use Doctrine\DBAL\Connection;
+use PHPUnit\Framework\Attributes\Test;
+
+/**
+ * Tests for homework API endpoints.
+ *
+ * @see Story 5.1 - Création de Devoirs
+ */
+final class HomeworkEndpointsTest extends ApiTestCase
+{
+    /**
+     * Opt-in for API Platform 5.0 behavior where kernel boot is explicit.
+     *
+     * @see https://github.com/api-platform/core/issues/6971
+     */
+    protected static ?bool $alwaysBootKernel = true;
+
+    private const string TENANT_ID = 'a1b2c3d4-e5f6-7890-abcd-ef1234567890';
+    private const string OWNER_TEACHER_ID = '550e8400-e29b-41d4-a716-446655440000';
+    private const string OTHER_TEACHER_ID = '660e8400-e29b-41d4-a716-446655440001';
+    private const string CLASS_ID = '550e8400-e29b-41d4-a716-776655440001';
+    private const string SUBJECT_ID = '550e8400-e29b-41d4-a716-886655440001';
+    private const string HOMEWORK_ID = '550e8400-e29b-41d4-a716-996655440001';
+    private const string DELETED_HOMEWORK_ID = '550e8400-e29b-41d4-a716-aa6655440001';
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+        $this->createFixtures();
+    }
+
+    protected function tearDown(): void
+    {
+        $container = static::getContainer();
+        /** @var Connection $connection */
+        $connection = $container->get(Connection::class);
+        $connection->executeStatement('DELETE FROM homework WHERE tenant_id = :tid', ['tid' => self::TENANT_ID]);
+        $connection->executeStatement('DELETE FROM school_classes WHERE id = :id', ['id' => self::CLASS_ID]);
+        $connection->executeStatement('DELETE FROM subjects WHERE id = :id', ['id' => self::SUBJECT_ID]);
+        $connection->executeStatement('DELETE FROM users WHERE id IN (:o, :t)', ['o' => self::OWNER_TEACHER_ID, 't' => self::OTHER_TEACHER_ID]);
+
+        parent::tearDown();
+    }
+
+    private function createFixtures(): void
+    {
+        $container = static::getContainer();
+        /** @var Connection $connection */
+        $connection = $container->get(Connection::class);
+
+        $schoolId = '550e8400-e29b-41d4-a716-ff6655440001';
+        $academicYearId = '550e8400-e29b-41d4-a716-ff6655440002';
+
+        $connection->executeStatement(
+            "INSERT INTO users (id, tenant_id, email, hashed_password, first_name, last_name, roles, statut, created_at, updated_at)
+             VALUES (:id, :tid, 'owner-hw@test.local', '', 'Owner', 'Teacher', '[\"ROLE_PROF\"]', 'active', NOW(), NOW())
+             ON CONFLICT (id) DO NOTHING",
+            ['id' => self::OWNER_TEACHER_ID, 'tid' => self::TENANT_ID],
+        );
+        $connection->executeStatement(
+            "INSERT INTO users (id, tenant_id, email, hashed_password, first_name, last_name, roles, statut, created_at, updated_at)
+             VALUES (:id, :tid, 'other-hw@test.local', '', 'Other', 'Teacher', '[\"ROLE_PROF\"]', 'active', NOW(), NOW())
+             ON CONFLICT (id) DO NOTHING",
+            ['id' => self::OTHER_TEACHER_ID, 'tid' => self::TENANT_ID],
+        );
+        $connection->executeStatement(
+            "INSERT INTO school_classes (id, tenant_id, school_id, academic_year_id, name, status, created_at, updated_at)
+             VALUES (:id, :tid, :sid, :ayid, 'Test-HW-Class', 'active', NOW(), NOW())
+             ON CONFLICT (id) DO NOTHING",
+            ['id' => self::CLASS_ID, 'tid' => self::TENANT_ID, 'sid' => $schoolId, 'ayid' => $academicYearId],
+        );
+        $connection->executeStatement(
+            "INSERT INTO subjects (id, tenant_id, school_id, name, code, status, created_at, updated_at)
+             VALUES (:id, :tid, :sid, 'Test-HW-Subject', 'THW', 'active', NOW(), NOW())
+             ON CONFLICT (id) DO NOTHING",
+            ['id' => self::SUBJECT_ID, 'tid' => self::TENANT_ID, 'sid' => $schoolId],
+        );
+    }
+
+    // =========================================================================
+    // Security - Without tenant (404)
+    // =========================================================================
+
+    #[Test]
+    public function getHomeworkListReturns404WithoutTenant(): void
+    {
+        $client = static::createClient();
+
+        $client->request('GET', '/api/homework', [
+            'headers' => [
+                'Host' => 'localhost',
+                'Accept' => 'application/json',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(404);
+    }
+
+    #[Test]
+    public function createHomeworkReturns404WithoutTenant(): void
+    {
+        $client = static::createClient();
+
+        $client->request('POST', '/api/homework', [
+            'headers' => [
+                'Host' => 'localhost',
+                'Accept' => 'application/json',
+                'Content-Type' => 'application/json',
+            ],
+            'json' => [
+                'classId' => self::CLASS_ID,
+                'subjectId' => self::SUBJECT_ID,
+                'title' => 'Devoir de maths',
+                'dueDate' => '2026-06-15',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(404);
+    }
+
+    #[Test]
+    public function updateHomeworkReturns404WithoutTenant(): void
+    {
+        $client = static::createClient();
+
+        $client->request('PATCH', '/api/homework/' . self::HOMEWORK_ID, [
+            'headers' => [
+                'Host' => 'localhost',
+                'Accept' => 'application/json',
+                'Content-Type' => 'application/merge-patch+json',
+            ],
+            'json' => [
+                'title' => 'Titre modifié',
+                'dueDate' => '2026-06-20',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(404);
+    }
+
+    #[Test]
+    public function deleteHomeworkReturns404WithoutTenant(): void
+    {
+        $client = static::createClient();
+
+        $client->request('DELETE', '/api/homework/' . self::HOMEWORK_ID, [
+            'headers' => [
+                'Host' => 'localhost',
+                'Accept' => 'application/json',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(404);
+    }
+
+    // =========================================================================
+    // Security - Without authentication (401)
+    // =========================================================================
+
+    #[Test]
+    public function getHomeworkListReturns401WithoutAuthentication(): void
+    {
+        $client = static::createClient();
+
+        $client->request('GET', 'http://ecole-alpha.classeo.local/api/homework', [
+            'headers' => [
+                'Accept' => 'application/json',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(401);
+    }
+
+    #[Test]
+    public function createHomeworkReturns401WithoutAuthentication(): void
+    {
+        $client = static::createClient();
+
+        $client->request('POST', 'http://ecole-alpha.classeo.local/api/homework', [
+            'headers' => [
+                'Accept' => 'application/json',
+                'Content-Type' => 'application/json',
+            ],
+            'json' => [
+                'classId' => self::CLASS_ID,
+                'subjectId' => self::SUBJECT_ID,
+                'title' => 'Devoir de maths',
+                'dueDate' => '2026-06-15',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(401);
+    }
+
+    #[Test]
+    public function updateHomeworkReturns401WithoutAuthentication(): void
+    {
+        $client = static::createClient();
+
+        $client->request('PATCH', 'http://ecole-alpha.classeo.local/api/homework/' . self::HOMEWORK_ID, [
+            'headers' => [
+                'Accept' => 'application/json',
+                'Content-Type' => 'application/merge-patch+json',
+            ],
+            'json' => [
+                'title' => 'Titre modifié',
+                'dueDate' => '2026-06-20',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(401);
+    }
+
+    #[Test]
+    public function deleteHomeworkReturns401WithoutAuthentication(): void
+    {
+        $client = static::createClient();
+
+        $client->request('DELETE', 'http://ecole-alpha.classeo.local/api/homework/' . self::HOMEWORK_ID, [
+            'headers' => [
+                'Accept' => 'application/json',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(401);
+    }
+
+    // =========================================================================
+    // 5.1-FUNC-005 (P1) - POST /homework with empty title -> 422
+    // =========================================================================
+
+    #[Test]
+    public function createHomeworkWithEmptyTitleReturns422(): void
+    {
+        $client = $this->createAuthenticatedClient(self::OWNER_TEACHER_ID, ['ROLE_PROF']);
+
+        $client->request('POST', 'http://ecole-alpha.classeo.local/api/homework', [
+            'headers' => [
+                'Accept' => 'application/json',
+                'Content-Type' => 'application/json',
+            ],
+            'json' => [
+                'classId' => self::CLASS_ID,
+                'subjectId' => self::SUBJECT_ID,
+                'title' => '',
+                'dueDate' => '2026-06-15',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(422);
+    }
+
+    // =========================================================================
+    // 5.1-FUNC-006 (P1) - POST /homework with past due date -> 400
+    // =========================================================================
+
+    #[Test]
+    public function createHomeworkWithPastDueDateReturns400(): void
+    {
+        $client = $this->createAuthenticatedClient(self::OWNER_TEACHER_ID, ['ROLE_PROF']);
+
+        $client->request('POST', 'http://ecole-alpha.classeo.local/api/homework', [
+            'headers' => [
+                'Accept' => 'application/json',
+                'Content-Type' => 'application/json',
+            ],
+            'json' => [
+                'classId' => self::CLASS_ID,
+                'subjectId' => self::SUBJECT_ID,
+                'title' => 'Devoir de maths',
+                'dueDate' => '2020-01-01',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(400);
+    }
+
+    // =========================================================================
+    // 5.1-FUNC-007 (P0) - PATCH /homework/{id} by non-owner -> 403
+    // =========================================================================
+
+    #[Test]
+    public function updateHomeworkByNonOwnerReturns403(): void
+    {
+        $this->persistHomework(self::HOMEWORK_ID, HomeworkStatus::PUBLISHED);
+
+        $client = $this->createAuthenticatedClient(self::OTHER_TEACHER_ID, ['ROLE_PROF']);
+
+        $client->request('PATCH', 'http://ecole-alpha.classeo.local/api/homework/' . self::HOMEWORK_ID, [
+            'headers' => [
+                'Accept' => 'application/json',
+                'Content-Type' => 'application/merge-patch+json',
+            ],
+            'json' => [
+                'title' => 'Titre piraté',
+                'dueDate' => '2026-06-20',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(403);
+    }
+
+    // =========================================================================
+    // 5.1-FUNC-008 (P1) - PATCH /homework/{id} on deleted homework -> 400
+    // =========================================================================
+
+    #[Test]
+    public function updateDeletedHomeworkReturns400(): void
+    {
+        $this->persistHomework(self::DELETED_HOMEWORK_ID, HomeworkStatus::DELETED);
+
+        $client = $this->createAuthenticatedClient(self::OWNER_TEACHER_ID, ['ROLE_PROF']);
+
+        $client->request('PATCH', 'http://ecole-alpha.classeo.local/api/homework/' . self::DELETED_HOMEWORK_ID, [
+            'headers' => [
+                'Accept' => 'application/json',
+                'Content-Type' => 'application/merge-patch+json',
+            ],
+            'json' => [
+                'title' => 'Titre modifié',
+                'dueDate' => '2026-06-20',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(400);
+    }
+
+    // =========================================================================
+    // 5.1-FUNC-009 (P0) - DELETE /homework/{id} by non-owner -> 403
+    // =========================================================================
+
+    #[Test]
+    public function deleteHomeworkByNonOwnerReturns403(): void
+    {
+        $this->persistHomework(self::HOMEWORK_ID, HomeworkStatus::PUBLISHED);
+
+        $client = $this->createAuthenticatedClient(self::OTHER_TEACHER_ID, ['ROLE_PROF']);
+
+        $client->request('DELETE', 'http://ecole-alpha.classeo.local/api/homework/' . self::HOMEWORK_ID, [
+            'headers' => [
+                'Accept' => 'application/json',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(403);
+    }
+
+    // =========================================================================
+    // 5.1-FUNC-010 (P1) - DELETE /homework/{id} on already deleted -> 400
+    // =========================================================================
+
+    #[Test]
+    public function deleteAlreadyDeletedHomeworkReturns400(): void
+    {
+        $this->persistHomework(self::DELETED_HOMEWORK_ID, HomeworkStatus::DELETED);
+
+        $client = $this->createAuthenticatedClient(self::OWNER_TEACHER_ID, ['ROLE_PROF']);
+
+        $client->request('DELETE', 'http://ecole-alpha.classeo.local/api/homework/' . self::DELETED_HOMEWORK_ID, [
+            'headers' => [
+                'Accept' => 'application/json',
+            ],
+        ]);
+
+        self::assertResponseStatusCodeSame(400);
+    }
+
+    // =========================================================================
+    // Helpers
+    // =========================================================================
+
+    private function createAuthenticatedClient(string $userId, array $roles): \ApiPlatform\Symfony\Bundle\Test\Client
+    {
+        $client = static::createClient();
+
+        $user = new SecurityUser(
+            userId: UserId::fromString($userId),
+            email: 'teacher@classeo.local',
+            hashedPassword: '',
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            roles: $roles,
+        );
+
+        $client->loginUser($user, 'api');
+
+        return $client;
+    }
+
+    private function persistHomework(string $homeworkId, HomeworkStatus $status): void
+    {
+        $now = new DateTimeImmutable();
+
+        $homework = Homework::reconstitute(
+            id: HomeworkId::fromString($homeworkId),
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            classId: ClassId::fromString(self::CLASS_ID),
+            subjectId: SubjectId::fromString(self::SUBJECT_ID),
+            teacherId: UserId::fromString(self::OWNER_TEACHER_ID),
+            title: 'Devoir existant',
+            description: null,
+            dueDate: new DateTimeImmutable('2026-06-15'),
+            status: $status,
+            createdAt: $now,
+            updatedAt: $now,
+        );
+
+        /** @var HomeworkRepository $repository */
+        $repository = static::getContainer()->get(HomeworkRepository::class);
+        $repository->save($homework);
+    }
+}
--- a/backend/tests/Unit/Scolarite/Application/Command/CreateHomework/CreateHomeworkHandlerTest.php
+++ b/backend/tests/Unit/Scolarite/Application/Command/CreateHomework/CreateHomeworkHandlerTest.php
@@ -0,0 +1,157 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Scolarite\Application\Command\CreateHomework;
+
+use App\Administration\Domain\Model\SchoolCalendar\SchoolCalendar;
+use App\Administration\Domain\Model\SchoolClass\AcademicYearId;
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\Subject\SubjectId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Application\Command\CreateHomework\CreateHomeworkCommand;
+use App\Scolarite\Application\Command\CreateHomework\CreateHomeworkHandler;
+use App\Scolarite\Application\Port\CurrentCalendarProvider;
+use App\Scolarite\Application\Port\EnseignantAffectationChecker;
+use App\Scolarite\Domain\Exception\DateEcheanceInvalideException;
+use App\Scolarite\Domain\Exception\EnseignantNonAffecteException;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Model\Homework\HomeworkStatus;
+use App\Scolarite\Domain\Service\DueDateValidator;
+use App\Scolarite\Infrastructure\Persistence\InMemory\InMemoryHomeworkRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class CreateHomeworkHandlerTest extends TestCase
+{
+    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440001';
+    private const string CLASS_ID = '550e8400-e29b-41d4-a716-446655440020';
+    private const string SUBJECT_ID = '550e8400-e29b-41d4-a716-446655440030';
+    private const string TEACHER_ID = '550e8400-e29b-41d4-a716-446655440010';
+
+    private InMemoryHomeworkRepository $homeworkRepository;
+    private Clock $clock;
+
+    protected function setUp(): void
+    {
+        $this->homeworkRepository = new InMemoryHomeworkRepository();
+        $this->clock = new class implements Clock {
+            public function now(): DateTimeImmutable
+            {
+                return new DateTimeImmutable('2026-03-12 10:00:00');
+            }
+        };
+    }
+
+    #[Test]
+    public function itCreatesHomeworkSuccessfully(): void
+    {
+        $handler = $this->createHandler(affecte: true);
+        $command = $this->createCommand();
+
+        $homework = $handler($command);
+
+        self::assertNotEmpty((string) $homework->id);
+        self::assertSame(HomeworkStatus::PUBLISHED, $homework->status);
+        self::assertSame('Exercices chapitre 5', $homework->title);
+    }
+
+    #[Test]
+    public function itPersistsHomeworkInRepository(): void
+    {
+        $handler = $this->createHandler(affecte: true);
+        $command = $this->createCommand();
+
+        $created = $handler($command);
+
+        $homework = $this->homeworkRepository->get(
+            HomeworkId::fromString((string) $created->id),
+            TenantId::fromString(self::TENANT_ID),
+        );
+
+        self::assertSame('Exercices chapitre 5', $homework->title);
+    }
+
+    #[Test]
+    public function itThrowsWhenTeacherNotAffected(): void
+    {
+        $handler = $this->createHandler(affecte: false);
+
+        $this->expectException(EnseignantNonAffecteException::class);
+
+        $handler($this->createCommand());
+    }
+
+    #[Test]
+    public function itThrowsWhenDueDateIsInvalid(): void
+    {
+        $handler = $this->createHandler(affecte: true);
+
+        $this->expectException(DateEcheanceInvalideException::class);
+
+        $handler($this->createCommand(dueDate: '2026-03-11'));
+    }
+
+    #[Test]
+    public function itAllowsNullDescription(): void
+    {
+        $handler = $this->createHandler(affecte: true);
+        $command = $this->createCommand(description: null);
+
+        $homework = $handler($command);
+
+        self::assertNull($homework->description);
+    }
+
+    private function createHandler(bool $affecte): CreateHomeworkHandler
+    {
+        $affectationChecker = new class($affecte) implements EnseignantAffectationChecker {
+            public function __construct(private readonly bool $affecte)
+            {
+            }
+
+            public function estAffecte(UserId $teacherId, ClassId $classId, SubjectId $subjectId, TenantId $tenantId): bool
+            {
+                return $this->affecte;
+            }
+        };
+
+        $calendarProvider = new class implements CurrentCalendarProvider {
+            public function forCurrentYear(TenantId $tenantId): SchoolCalendar
+            {
+                return SchoolCalendar::reconstitute(
+                    tenantId: $tenantId,
+                    academicYearId: AcademicYearId::fromString('550e8400-e29b-41d4-a716-446655440002'),
+                    zone: null,
+                    entries: [],
+                );
+            }
+        };
+
+        return new CreateHomeworkHandler(
+            $this->homeworkRepository,
+            $affectationChecker,
+            $calendarProvider,
+            new DueDateValidator(),
+            $this->clock,
+        );
+    }
+
+    private function createCommand(
+        ?string $dueDate = null,
+        mixed $description = 'Faire les exercices 1 à 10',
+    ): CreateHomeworkCommand {
+        return new CreateHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            classId: self::CLASS_ID,
+            subjectId: self::SUBJECT_ID,
+            teacherId: self::TEACHER_ID,
+            title: 'Exercices chapitre 5',
+            description: $description,
+            dueDate: $dueDate ?? '2026-04-15',
+        );
+    }
+}
--- a/backend/tests/Unit/Scolarite/Application/Command/DeleteHomework/DeleteHomeworkHandlerTest.php
+++ b/backend/tests/Unit/Scolarite/Application/Command/DeleteHomework/DeleteHomeworkHandlerTest.php
@@ -0,0 +1,130 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Scolarite\Application\Command\DeleteHomework;
+
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\Subject\SubjectId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Application\Command\DeleteHomework\DeleteHomeworkCommand;
+use App\Scolarite\Application\Command\DeleteHomework\DeleteHomeworkHandler;
+use App\Scolarite\Domain\Exception\DevoirDejaSupprimeException;
+use App\Scolarite\Domain\Exception\HomeworkNotFoundException;
+use App\Scolarite\Domain\Exception\NonProprietaireDuDevoirException;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Model\Homework\HomeworkStatus;
+use App\Scolarite\Infrastructure\Persistence\InMemory\InMemoryHomeworkRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class DeleteHomeworkHandlerTest extends TestCase
+{
+    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440001';
+
+    private InMemoryHomeworkRepository $homeworkRepository;
+    private Clock $clock;
+    private HomeworkId $existingHomeworkId;
+
+    protected function setUp(): void
+    {
+        $this->homeworkRepository = new InMemoryHomeworkRepository();
+        $this->clock = new class implements Clock {
+            public function now(): DateTimeImmutable
+            {
+                return new DateTimeImmutable('2026-03-12 10:00:00');
+            }
+        };
+
+        $this->seedHomework();
+    }
+
+    #[Test]
+    public function itDeletesHomeworkSuccessfully(): void
+    {
+        $handler = $this->createHandler();
+
+        $homework = $handler(new DeleteHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            homeworkId: (string) $this->existingHomeworkId,
+            teacherId: '550e8400-e29b-41d4-a716-446655440010',
+        ));
+
+        self::assertSame(HomeworkStatus::DELETED, $homework->status);
+    }
+
+    #[Test]
+    public function itThrowsWhenHomeworkNotFound(): void
+    {
+        $handler = $this->createHandler();
+
+        $this->expectException(HomeworkNotFoundException::class);
+
+        $handler(new DeleteHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            homeworkId: (string) HomeworkId::generate(),
+            teacherId: '550e8400-e29b-41d4-a716-446655440010',
+        ));
+    }
+
+    #[Test]
+    public function itThrowsWhenHomeworkAlreadyDeleted(): void
+    {
+        $homework = $this->homeworkRepository->get($this->existingHomeworkId, TenantId::fromString(self::TENANT_ID));
+        $homework->supprimer(new DateTimeImmutable('2026-03-12'));
+        $this->homeworkRepository->save($homework);
+
+        $handler = $this->createHandler();
+
+        $this->expectException(DevoirDejaSupprimeException::class);
+
+        $handler(new DeleteHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            homeworkId: (string) $this->existingHomeworkId,
+            teacherId: '550e8400-e29b-41d4-a716-446655440010',
+        ));
+    }
+
+    #[Test]
+    public function itThrowsWhenNotOwner(): void
+    {
+        $handler = $this->createHandler();
+
+        $this->expectException(NonProprietaireDuDevoirException::class);
+
+        $handler(new DeleteHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            homeworkId: (string) $this->existingHomeworkId,
+            teacherId: '550e8400-e29b-41d4-a716-446655440099',
+        ));
+    }
+
+    private function seedHomework(): void
+    {
+        $homework = Homework::creer(
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            classId: ClassId::fromString('550e8400-e29b-41d4-a716-446655440020'),
+            subjectId: SubjectId::fromString('550e8400-e29b-41d4-a716-446655440030'),
+            teacherId: UserId::fromString('550e8400-e29b-41d4-a716-446655440010'),
+            title: 'Exercices',
+            description: 'Description',
+            dueDate: new DateTimeImmutable('2026-04-15'),
+            now: new DateTimeImmutable('2026-03-10 10:00:00'),
+        );
+
+        $this->existingHomeworkId = $homework->id;
+        $this->homeworkRepository->save($homework);
+    }
+
+    private function createHandler(): DeleteHomeworkHandler
+    {
+        return new DeleteHomeworkHandler(
+            $this->homeworkRepository,
+            $this->clock,
+        );
+    }
+}
--- a/backend/tests/Unit/Scolarite/Application/Command/UpdateHomework/UpdateHomeworkHandlerTest.php
+++ b/backend/tests/Unit/Scolarite/Application/Command/UpdateHomework/UpdateHomeworkHandlerTest.php
@@ -0,0 +1,179 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Scolarite\Application\Command\UpdateHomework;
+
+use App\Administration\Domain\Model\SchoolCalendar\SchoolCalendar;
+use App\Administration\Domain\Model\SchoolClass\AcademicYearId;
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\Subject\SubjectId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Application\Command\UpdateHomework\UpdateHomeworkCommand;
+use App\Scolarite\Application\Command\UpdateHomework\UpdateHomeworkHandler;
+use App\Scolarite\Application\Port\CurrentCalendarProvider;
+use App\Scolarite\Domain\Exception\DateEcheanceInvalideException;
+use App\Scolarite\Domain\Exception\DevoirDejaSupprimeException;
+use App\Scolarite\Domain\Exception\HomeworkNotFoundException;
+use App\Scolarite\Domain\Exception\NonProprietaireDuDevoirException;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Service\DueDateValidator;
+use App\Scolarite\Infrastructure\Persistence\InMemory\InMemoryHomeworkRepository;
+use App\Shared\Domain\Clock;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class UpdateHomeworkHandlerTest extends TestCase
+{
+    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440001';
+
+    private InMemoryHomeworkRepository $homeworkRepository;
+    private Clock $clock;
+    private HomeworkId $existingHomeworkId;
+
+    protected function setUp(): void
+    {
+        $this->homeworkRepository = new InMemoryHomeworkRepository();
+        $this->clock = new class implements Clock {
+            public function now(): DateTimeImmutable
+            {
+                return new DateTimeImmutable('2026-03-12 10:00:00');
+            }
+        };
+
+        $this->seedHomework();
+    }
+
+    #[Test]
+    public function itUpdatesHomeworkSuccessfully(): void
+    {
+        $handler = $this->createHandler();
+        $command = new UpdateHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            homeworkId: (string) $this->existingHomeworkId,
+            teacherId: '550e8400-e29b-41d4-a716-446655440010',
+            title: 'Titre modifié',
+            description: 'Nouvelle description',
+            dueDate: '2026-04-20',
+        );
+
+        $homework = $handler($command);
+
+        self::assertSame('Titre modifié', $homework->title);
+        self::assertSame('Nouvelle description', $homework->description);
+    }
+
+    #[Test]
+    public function itThrowsWhenHomeworkNotFound(): void
+    {
+        $handler = $this->createHandler();
+
+        $this->expectException(HomeworkNotFoundException::class);
+
+        $handler(new UpdateHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            homeworkId: (string) HomeworkId::generate(),
+            teacherId: '550e8400-e29b-41d4-a716-446655440010',
+            title: 'Test',
+            description: null,
+            dueDate: '2026-04-20',
+        ));
+    }
+
+    #[Test]
+    public function itThrowsWhenDueDateInvalid(): void
+    {
+        $handler = $this->createHandler();
+
+        $this->expectException(DateEcheanceInvalideException::class);
+
+        $handler(new UpdateHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            homeworkId: (string) $this->existingHomeworkId,
+            teacherId: '550e8400-e29b-41d4-a716-446655440010',
+            title: 'Test',
+            description: null,
+            dueDate: '2026-03-11',
+        ));
+    }
+
+    #[Test]
+    public function itThrowsWhenHomeworkDeleted(): void
+    {
+        $homework = $this->homeworkRepository->get($this->existingHomeworkId, TenantId::fromString(self::TENANT_ID));
+        $homework->supprimer(new DateTimeImmutable('2026-03-12'));
+        $this->homeworkRepository->save($homework);
+
+        $handler = $this->createHandler();
+
+        $this->expectException(DevoirDejaSupprimeException::class);
+
+        $handler(new UpdateHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            homeworkId: (string) $this->existingHomeworkId,
+            teacherId: '550e8400-e29b-41d4-a716-446655440010',
+            title: 'Test',
+            description: null,
+            dueDate: '2026-04-20',
+        ));
+    }
+
+    #[Test]
+    public function itThrowsWhenNotOwner(): void
+    {
+        $handler = $this->createHandler();
+
+        $this->expectException(NonProprietaireDuDevoirException::class);
+
+        $handler(new UpdateHomeworkCommand(
+            tenantId: self::TENANT_ID,
+            homeworkId: (string) $this->existingHomeworkId,
+            teacherId: '550e8400-e29b-41d4-a716-446655440099',
+            title: 'Test',
+            description: null,
+            dueDate: '2026-04-20',
+        ));
+    }
+
+    private function seedHomework(): void
+    {
+        $homework = Homework::creer(
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            classId: ClassId::fromString('550e8400-e29b-41d4-a716-446655440020'),
+            subjectId: SubjectId::fromString('550e8400-e29b-41d4-a716-446655440030'),
+            teacherId: UserId::fromString('550e8400-e29b-41d4-a716-446655440010'),
+            title: 'Exercices',
+            description: 'Description',
+            dueDate: new DateTimeImmutable('2026-04-15'),
+            now: new DateTimeImmutable('2026-03-10 10:00:00'),
+        );
+
+        $this->existingHomeworkId = $homework->id;
+        $this->homeworkRepository->save($homework);
+    }
+
+    private function createHandler(): UpdateHomeworkHandler
+    {
+        $calendarProvider = new class implements CurrentCalendarProvider {
+            public function forCurrentYear(TenantId $tenantId): SchoolCalendar
+            {
+                return SchoolCalendar::reconstitute(
+                    tenantId: $tenantId,
+                    academicYearId: AcademicYearId::fromString('550e8400-e29b-41d4-a716-446655440002'),
+                    zone: null,
+                    entries: [],
+                );
+            }
+        };
+
+        return new UpdateHomeworkHandler(
+            $this->homeworkRepository,
+            $calendarProvider,
+            new DueDateValidator(),
+            $this->clock,
+        );
+    }
+}
--- a/backend/tests/Unit/Scolarite/Domain/Model/Homework/HomeworkAttachmentTest.php
+++ b/backend/tests/Unit/Scolarite/Domain/Model/Homework/HomeworkAttachmentTest.php
@@ -0,0 +1,106 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Scolarite\Domain\Model\Homework;
+
+use App\Scolarite\Domain\Exception\PieceJointeInvalideException;
+use App\Scolarite\Domain\Model\Homework\HomeworkAttachment;
+use App\Scolarite\Domain\Model\Homework\HomeworkAttachmentId;
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class HomeworkAttachmentTest extends TestCase
+{
+    #[Test]
+    public function createsValidAttachment(): void
+    {
+        $id = HomeworkAttachmentId::generate();
+        $uploadedAt = new DateTimeImmutable('2026-03-12 10:00:00');
+
+        $attachment = new HomeworkAttachment(
+            id: $id,
+            filename: 'exercices.pdf',
+            filePath: 'homework/abc123/exercices.pdf',
+            fileSize: 500_000,
+            mimeType: 'application/pdf',
+            uploadedAt: $uploadedAt,
+        );
+
+        self::assertTrue($attachment->id->equals($id));
+        self::assertSame('exercices.pdf', $attachment->filename);
+        self::assertSame('homework/abc123/exercices.pdf', $attachment->filePath);
+        self::assertSame(500_000, $attachment->fileSize);
+        self::assertSame('application/pdf', $attachment->mimeType);
+        self::assertEquals($uploadedAt, $attachment->uploadedAt);
+    }
+
+    #[Test]
+    public function acceptsJpegMimeType(): void
+    {
+        $attachment = $this->createAttachmentWithMimeType('image/jpeg');
+
+        self::assertSame('image/jpeg', $attachment->mimeType);
+    }
+
+    #[Test]
+    public function acceptsPngMimeType(): void
+    {
+        $attachment = $this->createAttachmentWithMimeType('image/png');
+
+        self::assertSame('image/png', $attachment->mimeType);
+    }
+
+    #[Test]
+    public function rejectsInvalidMimeType(): void
+    {
+        $this->expectException(PieceJointeInvalideException::class);
+        $this->expectExceptionMessageMatches('/text\/plain/');
+
+        $this->createAttachmentWithMimeType('text/plain');
+    }
+
+    #[Test]
+    public function rejectsFileTooLarge(): void
+    {
+        $this->expectException(PieceJointeInvalideException::class);
+        $this->expectExceptionMessageMatches('/taille maximum/');
+
+        new HomeworkAttachment(
+            id: HomeworkAttachmentId::generate(),
+            filename: 'big.pdf',
+            filePath: 'homework/abc/big.pdf',
+            fileSize: 11 * 1024 * 1024, // 11 Mo
+            mimeType: 'application/pdf',
+            uploadedAt: new DateTimeImmutable(),
+        );
+    }
+
+    #[Test]
+    public function acceptsExactMaxSize(): void
+    {
+        $attachment = new HomeworkAttachment(
+            id: HomeworkAttachmentId::generate(),
+            filename: 'max.pdf',
+            filePath: 'homework/abc/max.pdf',
+            fileSize: 10 * 1024 * 1024, // Exactement 10 Mo
+            mimeType: 'application/pdf',
+            uploadedAt: new DateTimeImmutable(),
+        );
+
+        self::assertSame(10 * 1024 * 1024, $attachment->fileSize);
+    }
+
+    private function createAttachmentWithMimeType(string $mimeType): HomeworkAttachment
+    {
+        return new HomeworkAttachment(
+            id: HomeworkAttachmentId::generate(),
+            filename: 'test.file',
+            filePath: 'homework/abc/test.file',
+            fileSize: 1000,
+            mimeType: $mimeType,
+            uploadedAt: new DateTimeImmutable(),
+        );
+    }
+}
--- a/backend/tests/Unit/Scolarite/Domain/Model/Homework/HomeworkTest.php
+++ b/backend/tests/Unit/Scolarite/Domain/Model/Homework/HomeworkTest.php
@@ -0,0 +1,223 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Scolarite\Domain\Model\Homework;
+
+use App\Administration\Domain\Model\SchoolClass\ClassId;
+use App\Administration\Domain\Model\Subject\SubjectId;
+use App\Administration\Domain\Model\User\UserId;
+use App\Scolarite\Domain\Event\DevoirCree;
+use App\Scolarite\Domain\Event\DevoirModifie;
+use App\Scolarite\Domain\Event\DevoirSupprime;
+use App\Scolarite\Domain\Exception\DevoirDejaSupprimeException;
+use App\Scolarite\Domain\Model\Homework\Homework;
+use App\Scolarite\Domain\Model\Homework\HomeworkId;
+use App\Scolarite\Domain\Model\Homework\HomeworkStatus;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class HomeworkTest extends TestCase
+{
+    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440001';
+    private const string CLASS_ID = '550e8400-e29b-41d4-a716-446655440020';
+    private const string SUBJECT_ID = '550e8400-e29b-41d4-a716-446655440030';
+    private const string TEACHER_ID = '550e8400-e29b-41d4-a716-446655440010';
+
+    #[Test]
+    public function creerCreatesPublishedHomework(): void
+    {
+        $homework = $this->createHomework();
+
+        self::assertSame(HomeworkStatus::PUBLISHED, $homework->status);
+    }
+
+    #[Test]
+    public function creerRecordsDevoirCreeEvent(): void
+    {
+        $homework = $this->createHomework();
+
+        $events = $homework->pullDomainEvents();
+
+        self::assertCount(1, $events);
+        self::assertInstanceOf(DevoirCree::class, $events[0]);
+        self::assertSame($homework->id, $events[0]->homeworkId);
+    }
+
+    #[Test]
+    public function creerSetsAllProperties(): void
+    {
+        $tenantId = TenantId::fromString(self::TENANT_ID);
+        $classId = ClassId::fromString(self::CLASS_ID);
+        $subjectId = SubjectId::fromString(self::SUBJECT_ID);
+        $teacherId = UserId::fromString(self::TEACHER_ID);
+        $dueDate = new DateTimeImmutable('2026-04-15');
+        $now = new DateTimeImmutable('2026-03-12 10:00:00');
+
+        $homework = Homework::creer(
+            tenantId: $tenantId,
+            classId: $classId,
+            subjectId: $subjectId,
+            teacherId: $teacherId,
+            title: 'Exercices chapitre 5',
+            description: 'Faire les exercices 1 à 10',
+            dueDate: $dueDate,
+            now: $now,
+        );
+
+        self::assertTrue($homework->tenantId->equals($tenantId));
+        self::assertTrue($homework->classId->equals($classId));
+        self::assertTrue($homework->subjectId->equals($subjectId));
+        self::assertTrue($homework->teacherId->equals($teacherId));
+        self::assertSame('Exercices chapitre 5', $homework->title);
+        self::assertSame('Faire les exercices 1 à 10', $homework->description);
+        self::assertEquals($dueDate, $homework->dueDate);
+        self::assertSame(HomeworkStatus::PUBLISHED, $homework->status);
+        self::assertEquals($now, $homework->createdAt);
+        self::assertEquals($now, $homework->updatedAt);
+    }
+
+    #[Test]
+    public function creerAllowsNullDescription(): void
+    {
+        $homework = Homework::creer(
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            classId: ClassId::fromString(self::CLASS_ID),
+            subjectId: SubjectId::fromString(self::SUBJECT_ID),
+            teacherId: UserId::fromString(self::TEACHER_ID),
+            title: 'Devoir sans description',
+            description: null,
+            dueDate: new DateTimeImmutable('2026-04-15'),
+            now: new DateTimeImmutable('2026-03-12 10:00:00'),
+        );
+
+        self::assertNull($homework->description);
+    }
+
+    #[Test]
+    public function modifierUpdatesFieldsAndRecordsEvent(): void
+    {
+        $homework = $this->createHomework();
+        $homework->pullDomainEvents();
+        $modifiedAt = new DateTimeImmutable('2026-03-13 14:00:00');
+        $newDueDate = new DateTimeImmutable('2026-04-20');
+
+        $homework->modifier(
+            title: 'Titre modifié',
+            description: 'Nouvelle description',
+            dueDate: $newDueDate,
+            now: $modifiedAt,
+        );
+
+        self::assertSame('Titre modifié', $homework->title);
+        self::assertSame('Nouvelle description', $homework->description);
+        self::assertEquals($newDueDate, $homework->dueDate);
+        self::assertEquals($modifiedAt, $homework->updatedAt);
+
+        $events = $homework->pullDomainEvents();
+        self::assertCount(1, $events);
+        self::assertInstanceOf(DevoirModifie::class, $events[0]);
+        self::assertSame($homework->id, $events[0]->homeworkId);
+    }
+
+    #[Test]
+    public function modifierThrowsWhenDeleted(): void
+    {
+        $homework = $this->createHomework();
+        $homework->supprimer(new DateTimeImmutable('2026-03-13'));
+
+        $this->expectException(DevoirDejaSupprimeException::class);
+
+        $homework->modifier(
+            title: 'Titre',
+            description: null,
+            dueDate: new DateTimeImmutable('2026-04-20'),
+            now: new DateTimeImmutable('2026-03-14'),
+        );
+    }
+
+    #[Test]
+    public function supprimerChangesStatusAndRecordsEvent(): void
+    {
+        $homework = $this->createHomework();
+        $homework->pullDomainEvents();
+        $deletedAt = new DateTimeImmutable('2026-03-14 08:00:00');
+
+        $homework->supprimer($deletedAt);
+
+        self::assertSame(HomeworkStatus::DELETED, $homework->status);
+        self::assertEquals($deletedAt, $homework->updatedAt);
+
+        $events = $homework->pullDomainEvents();
+        self::assertCount(1, $events);
+        self::assertInstanceOf(DevoirSupprime::class, $events[0]);
+        self::assertSame($homework->id, $events[0]->homeworkId);
+    }
+
+    #[Test]
+    public function supprimerThrowsWhenAlreadyDeleted(): void
+    {
+        $homework = $this->createHomework();
+        $homework->supprimer(new DateTimeImmutable('2026-03-14'));
+
+        $this->expectException(DevoirDejaSupprimeException::class);
+
+        $homework->supprimer(new DateTimeImmutable('2026-03-15'));
+    }
+
+    #[Test]
+    public function reconstituteRestoresAllPropertiesWithoutEvents(): void
+    {
+        $id = HomeworkId::generate();
+        $tenantId = TenantId::fromString(self::TENANT_ID);
+        $classId = ClassId::fromString(self::CLASS_ID);
+        $subjectId = SubjectId::fromString(self::SUBJECT_ID);
+        $teacherId = UserId::fromString(self::TEACHER_ID);
+        $dueDate = new DateTimeImmutable('2026-04-15');
+        $createdAt = new DateTimeImmutable('2026-03-12 10:00:00');
+        $updatedAt = new DateTimeImmutable('2026-03-13 14:00:00');
+
+        $homework = Homework::reconstitute(
+            id: $id,
+            tenantId: $tenantId,
+            classId: $classId,
+            subjectId: $subjectId,
+            teacherId: $teacherId,
+            title: 'Exercices chapitre 5',
+            description: 'Faire les exercices',
+            dueDate: $dueDate,
+            status: HomeworkStatus::PUBLISHED,
+            createdAt: $createdAt,
+            updatedAt: $updatedAt,
+        );
+
+        self::assertTrue($homework->id->equals($id));
+        self::assertTrue($homework->tenantId->equals($tenantId));
+        self::assertTrue($homework->classId->equals($classId));
+        self::assertTrue($homework->subjectId->equals($subjectId));
+        self::assertTrue($homework->teacherId->equals($teacherId));
+        self::assertSame('Exercices chapitre 5', $homework->title);
+        self::assertSame('Faire les exercices', $homework->description);
+        self::assertEquals($dueDate, $homework->dueDate);
+        self::assertSame(HomeworkStatus::PUBLISHED, $homework->status);
+        self::assertEquals($createdAt, $homework->createdAt);
+        self::assertEquals($updatedAt, $homework->updatedAt);
+        self::assertEmpty($homework->pullDomainEvents());
+    }
+
+    private function createHomework(): Homework
+    {
+        return Homework::creer(
+            tenantId: TenantId::fromString(self::TENANT_ID),
+            classId: ClassId::fromString(self::CLASS_ID),
+            subjectId: SubjectId::fromString(self::SUBJECT_ID),
+            teacherId: UserId::fromString(self::TEACHER_ID),
+            title: 'Exercices chapitre 5',
+            description: 'Faire les exercices 1 à 10',
+            dueDate: new DateTimeImmutable('2026-04-15'),
+            now: new DateTimeImmutable('2026-03-12 10:00:00'),
+        );
+    }
+}
--- a/backend/tests/Unit/Scolarite/Domain/Service/DueDateValidatorTest.php
+++ b/backend/tests/Unit/Scolarite/Domain/Service/DueDateValidatorTest.php
@@ -0,0 +1,138 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Scolarite\Domain\Service;
+
+use App\Administration\Domain\Model\SchoolCalendar\CalendarEntry;
+use App\Administration\Domain\Model\SchoolCalendar\CalendarEntryId;
+use App\Administration\Domain\Model\SchoolCalendar\CalendarEntryType;
+use App\Administration\Domain\Model\SchoolCalendar\SchoolCalendar;
+use App\Administration\Domain\Model\SchoolClass\AcademicYearId;
+use App\Scolarite\Domain\Exception\DateEcheanceInvalideException;
+use App\Scolarite\Domain\Service\DueDateValidator;
+use App\Shared\Domain\Tenant\TenantId;
+use DateTimeImmutable;
+use PHPUnit\Framework\Attributes\Test;
+use PHPUnit\Framework\TestCase;
+
+final class DueDateValidatorTest extends TestCase
+{
+    private DueDateValidator $validator;
+
+    protected function setUp(): void
+    {
+        $this->validator = new DueDateValidator();
+    }
+
+    #[Test]
+    public function acceptsValidFutureSchoolDay(): void
+    {
+        $now = new DateTimeImmutable('2026-03-12 10:00:00'); // Jeudi
+        $dueDate = new DateTimeImmutable('2026-03-16'); // Lundi
+        $calendar = $this->createEmptyCalendar();
+
+        $this->validator->valider($dueDate, $now, $calendar);
+
+        $this->addToAssertionCount(1);
+    }
+
+    #[Test]
+    public function rejectsPastDate(): void
+    {
+        $now = new DateTimeImmutable('2026-03-12 10:00:00');
+        $dueDate = new DateTimeImmutable('2026-03-11');
+        $calendar = $this->createEmptyCalendar();
+
+        $this->expectException(DateEcheanceInvalideException::class);
+        $this->expectExceptionMessageMatches('/futur/');
+
+        $this->validator->valider($dueDate, $now, $calendar);
+    }
+
+    #[Test]
+    public function rejectsTodayDate(): void
+    {
+        $now = new DateTimeImmutable('2026-03-12 10:00:00');
+        $dueDate = new DateTimeImmutable('2026-03-12');
+        $calendar = $this->createEmptyCalendar();
+
+        $this->expectException(DateEcheanceInvalideException::class);
+        $this->expectExceptionMessageMatches('/futur/');
+
+        $this->validator->valider($dueDate, $now, $calendar);
+    }
+
+    #[Test]
+    public function acceptsTomorrowDate(): void
+    {
+        $now = new DateTimeImmutable('2026-03-12 10:00:00'); // Jeudi
+        $dueDate = new DateTimeImmutable('2026-03-13'); // Vendredi
+        $calendar = $this->createEmptyCalendar();
+
+        $this->validator->valider($dueDate, $now, $calendar);
+
+        $this->addToAssertionCount(1);
+    }
+
+    #[Test]
+    public function rejectsWeekendDate(): void
+    {
+        $now = new DateTimeImmutable('2026-03-12 10:00:00');
+        $dueDate = new DateTimeImmutable('2026-03-14'); // Samedi
+        $calendar = $this->createEmptyCalendar();
+
+        $this->expectException(DateEcheanceInvalideException::class);
+        $this->expectExceptionMessageMatches('/weekend/');
+
+        $this->validator->valider($dueDate, $now, $calendar);
+    }
+
+    #[Test]
+    public function rejectsHolidayDate(): void
+    {
+        $now = new DateTimeImmutable('2026-03-12 10:00:00');
+        $dueDate = new DateTimeImmutable('2026-04-06'); // Lundi
+        $calendar = $this->createCalendarWithVacation(
+            new DateTimeImmutable('2026-04-04'),
+            new DateTimeImmutable('2026-04-19'),
+            'Vacances de printemps',
+        );
+
+        $this->expectException(DateEcheanceInvalideException::class);
+        $this->expectExceptionMessageMatches('/Vacances de printemps/');
+
+        $this->validator->valider($dueDate, $now, $calendar);
+    }
+
+    private function createEmptyCalendar(): SchoolCalendar
+    {
+        return SchoolCalendar::reconstitute(
+            tenantId: TenantId::fromString('550e8400-e29b-41d4-a716-446655440001'),
+            academicYearId: AcademicYearId::fromString('550e8400-e29b-41d4-a716-446655440002'),
+            zone: null,
+            entries: [],
+        );
+    }
+
+    private function createCalendarWithVacation(
+        DateTimeImmutable $start,
+        DateTimeImmutable $end,
+        string $label,
+    ): SchoolCalendar {
+        return SchoolCalendar::reconstitute(
+            tenantId: TenantId::fromString('550e8400-e29b-41d4-a716-446655440001'),
+            academicYearId: AcademicYearId::fromString('550e8400-e29b-41d4-a716-446655440002'),
+            zone: null,
+            entries: [
+                new CalendarEntry(
+                    id: CalendarEntryId::generate(),
+                    type: CalendarEntryType::VACATION,
+                    startDate: $start,
+                    endDate: $end,
+                    label: $label,
+                ),
+            ],
+        );
+    }
+}
--- a/backend/tests/Unit/Scolarite/Infrastructure/Storage/InMemoryFileStorage.php
+++ b/backend/tests/Unit/Scolarite/Infrastructure/Storage/InMemoryFileStorage.php
@@ -0,0 +1,41 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Tests\Unit\Scolarite\Infrastructure\Storage;
+
+use App\Scolarite\Application\Port\FileStorage;
+
+use function is_string;
+
+use Override;
+
+final class InMemoryFileStorage implements FileStorage
+{
+    /** @var array<string, string> */
+    private array $files = [];
+
+    #[Override]
+    public function upload(string $path, mixed $content, string $mimeType): string
+    {
+        $this->files[$path] = is_string($content) ? $content : '';
+
+        return $path;
+    }
+
+    #[Override]
+    public function delete(string $path): void
+    {
+        unset($this->files[$path]);
+    }
+
+    public function has(string $path): bool
+    {
+        return isset($this->files[$path]);
+    }
+
+    public function get(string $path): ?string
+    {
+        return $this->files[$path] ?? null;
+    }
+}