Product Decisions This Supports

Architectural Evolution: Transition from procedural or anemic domain models to a rich DDD architecture, enabling better scalability for complex business domains (e.g., e-commerce, SaaS platforms, or financial systems).
Bounded Context Adoption: Structurally enforce bounded contexts to isolate domain logic, reducing merge conflicts and enabling independent team ownership of features (e.g., "Order Processing" vs. "Inventory Management").
Domain-Driven Prioritization: Shift focus from infrastructure concerns (e.g., database schemas, APIs) to business value, aligning development with stakeholder priorities (e.g., "How does this support our subscription model?").
Build vs. Buy: Avoid reinventing DDD infrastructure (e.g., repositories, value objects, event handling) while maintaining flexibility to extend or replace components (e.g., swapping InMemoryRepository for Doctrine later).
Use Cases:
- Greenfield Projects: Launch with DDD from day one (e.g., a new SaaS platform).
- Legacy Refactoring: Gradually introduce DDD to modularize monolithic Laravel apps (e.g., extracting "Billing" into a bounded context).
- Microservices Readiness: Prepare for decomposition by encapsulating domain logic in reusable modules.
- Regulatory Compliance: Model business rules explicitly (e.g., GDPR data handling, financial auditing) to ensure traceability.

When to Consider This Package

Adopt if:
- Your project has complex business rules that require explicit modeling (e.g., workflows, validation logic, or domain-specific calculations).
- Your team is investing in long-term maintainability and willing to upskill in DDD (expect 3–6 months of ramp-up).
- You’re building a modular monolith or microservices and need to decouple domain logic from infrastructure.
- You’re using Laravel and want to avoid framework-specific DDD solutions (e.g., Symfony bundles) while keeping PHP-native flexibility.
- You need reusable abstractions for:
  - Value Objects (e.g., Email, Money, UUID).
  - Repositories (e.g., UserRepository with pagination, filtering).
  - CQRS-like patterns (Commands/Queries/Handlers) without full CQRS frameworks.
  - Domain Events (e.g., OrderCreated, PaymentFailed).
- You’re integrating with API Platform, Sylius, or Doctrine later (bridges are available).
Avoid if:
- Your project is CRUD-heavy with minimal domain logic (e.g., a blog with posts/comments). Overhead isn’t justified.
- Your team lacks PHP/Laravel experience or DDD familiarity. Consider starting with simpler architectures (e.g., Clean Architecture) first.
- You need real-time event sourcing or advanced CQRS (e.g., event versioning, projections). This package focuses on foundational DDD, not these patterns.
- You’re constrained by performance-critical paths (e.g., high-frequency trading). DDD abstractions add latency.
- You’re using non-PHP stacks (e.g., Node.js, Python) or alternative Laravel DDD tools (e.g., spatie/laravel-ddd).
Look Elsewhere if:
- You need enterprise-grade DDD tools: Evaluate Axon Framework (PHP), EventSauce, or custom solutions for large-scale systems.
- You’re locked into Symfony and prefer its ecosystem (e.g., symfony/ux-dropzone, api-platform).
- You require graphQL-native DDD (e.g., rebornix/laravel-ddd or spatie/laravel-query-builder).
- Your domain is data-intensive (e.g., analytics, real-time dashboards). Consider ELT pipelines or data mesh approaches.

How to Pitch It (Stakeholders)

For Executives (Business/Strategy)

*"This package helps us build software that adapts to business needs—not the other way around. Right now, our codebase might look like a ‘digital photocopy’ of our business processes, but as we grow, that rigidity will slow us down. With Domain-Driven Design (DDD), we’ll:

Reduce technical debt by organizing code around business capabilities (e.g., ‘Subscriptions,’ ‘Payments’) instead of technical layers.
Future-proof our platform to handle changes like new regulations, market expansions, or feature requests without rewrites.
Improve collaboration between devs, product, and ops by speaking the same language (ubiquitous language) about how the business works. Think of it like upgrading from a spreadsheet to an ERP system—initially more complex, but it pays off when we scale. For a project like [X Initiative], this could save us 6–12 months of rework down the line. The trade-off? A 3–6 month learning curve for the team, but the ROI is clear."

Ask for:

Budget for team training (DDD workshops, books like Domain-Driven Design by Eric Evans).
Approval to pilot DDD in one bounded context (e.g., "Orders") before full adoption.

For Engineering Leaders (Architecture/Tech Debt)

*"This package gives us a scalable, Laravel-native foundation for DDD, which is critical for projects like [X] where:

Complexity is growing (e.g., workflows, multi-tenant logic, compliance rules).
Team turnover risks losing institutional knowledge of the domain.
Legacy code is becoming a bottleneck for new features.

Key Benefits:

Separation of Concerns:
- Domain Layer: Pure business logic (e.g., Order calculates taxes, validates rules).
- Application Layer: Use cases (e.g., PlaceOrderCommand).
- Infrastructure Layer: Laravel/Eloquent/Events (e.g., OrderRepository). No more ‘anemic domain models’ where behavior is scattered across services.
Reusable Abstractions:
- Value Objects: Strongly typed Email, Money, UUID (no more string fields with hidden validation).
- Repositories: Standardized interfaces for find(), save(), search() (e.g., UserRepository instead of User::query()).
- Commands/Queries: Clean separation for write vs. read operations (e.g., CreateUserCommand vs. GetUserQuery).
Future-Proofing:
- Microservices-ready: Bounded contexts can become independent services later.
- Testability: Domain logic is unit-testable without databases (e.g., test Order rules with InMemoryRepository).
- Extensible: Swap out InMemoryRepository for Doctrine or API Platform later.

Trade-offs:

Initial Complexity: Expect 20–30% more boilerplate for new features (e.g., defining User as an entity with invariants).
Team Upskill: Need to learn DDD concepts (e.g., Aggregate Roots, Domain Events). Propose a 2-day workshop to align the team.

Recommendation: Start with a pilot bounded context (e.g., ‘Orders’) to validate the approach before full adoption. If successful, we can gradually refactor other domains (e.g., ‘Users’, ‘Payments’)."*

For Developers (Implementation)

*"This package lets us write code that’s closer to the business problem, not just database operations. Here’s how it changes our workflow:

Before (Anemic Domain Model):

// User.php (just a data bag)
class User {
    public $name;
    public $email;
}

// UserService.php (handles all logic)
class UserService {
    public function validateEmail(User $user) { ... }
    public function calculateAge(User $user) { ... }
}

After (DDD with ddd-foundation):

// User.php (rich domain model)
class User {
    private Email $email;
    private string $name;

    public function __construct(Email $email, string $name) {
        $this->email = $email;
        $this->name = $name;
    }

    public function isEmailValid(): bool {
        return $this->email->isValid();
    }
}

// UserRepository.php (standardized interface)
class UserRepository implements RepositoryInterface {
    public function findByEmail(Email $email): ?User { ... }
}

// CreateUserCommand.php (application layer)
readonly class CreateUserCommand implements CommandInterface {
    public function __construct(
        public string $name,
        public string $email,
    ) {}
}

// CreateUserHandler.php (handles the command)
#[AsCommandHandler]
class CreateUserHandler {
    public function __invoke(CreateUserCommand $command) {
        $user = new User(
            Email::fromString($command->email),
            $command->name,

Ddd Foundation Laravel Package