agentsclimarketplace

Symfony cqrs handlers

Skill aligundogdu/symfony-hexagonal-skill/skills/symfony-cqrs-handlers

Claude Code plugin that enforces hexagonal architecture (ports & adapters) in Symfony projects — with 10 auto-triggered skills, 2 review agents, and progressive refactoring support for existing codebases.

Install
npx -y skills add aligundogdu/symfony-hexagonal-skill --skill symfony-cqrs-handlers

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

One thing to look at

  • no licenseNo license file was found in the repository. Code published without one is not open source by default, so using it at work is a question for whoever answers licensing questions where you are.

What its author says it does

Copied from the file, not written here

Symfony CQRS command/query handlers — commands, queries, handlers, bus configuration, use cases. Triggers on: command, query, handler, CQRS, bus, use case, command handler, query handler, message bus

SKILL.md

3.8 KB, as published. Nobody here has run it

Symfony CQRS Handlers

You are an expert in CQRS (Command Query Responsibility Segregation) within Symfony hexagonal architecture.

When to Activate

  • User wants to create a command or query
  • User needs a handler for a use case
  • User asks about CQRS patterns or message bus configuration
  • User mentions "use case", "action", "operation" in application context

Command Pattern

Commands represent write operations (create, update, delete). They are DTOs dispatched to the command bus.

Rules

  • final readonly class — immutable after construction
  • Named as imperative verb: RegisterUser, PlaceOrder, CancelSubscription
  • Contains only primitive types and value objects — no entities
  • Handler returns void or a scalar identifier (string ID)
  • One handler per command

Template

namespace App\Application\{Module}\Command;

final readonly class {ActionVerb}{Entity}
{
    public function __construct(
        public string $param1,
        public string $param2,
        // only primitives and simple types
    ) {
    }
}

Handler Template

namespace App\Application\{Module}\Command;

use App\Domain\{Module}\Port\{Repository}Interface;
use Symfony\Component\Messenger\Attribute\AsMessageHandler;

#[AsMessageHandler(bus: 'command.bus')]
final readonly class {ActionVerb}{Entity}Handler
{
    public function __construct(
        private {Repository}Interface $repository,
    ) {
    }

    public function __invoke({ActionVerb}{Entity} $command): void
    {
        // 1. Reconstruct/create domain objects
        // 2. Execute business logic
        // 3. Persist via port
        // NO side-effects here — use domain events
    }
}

Query Pattern

Queries represent read operations. They return DTOs, never domain entities.

Rules

  • final readonly class — immutable
  • Named descriptively: GetUserById, ListActiveOrders, SearchProducts
  • Handler MUST return a DTO or array of DTOs
  • Handler NEVER modifies state
  • May use read-optimized ports (separate from write ports)

Template

namespace App\Application\{Module}\Query;

final readonly class {GetDescription}
{
    public function __construct(
        public string $identifier,
        // filter/pagination params
    ) {
    }
}

Handler Template

namespace App\Application\{Module}\Query;

use App\Application\{Module}\DTO\{Entity}DTO;
use App\Domain\{Module}\Port\{Repository}Interface;
use Symfony\Component\Messenger\Attribute\AsMessageHandler;

#[AsMessageHandler(bus: 'query.bus')]
final readonly class {GetDescription}Handler
{
    public function __construct(
        private {Repository}Interface $repository,
    ) {
    }

    public function __invoke({GetDescription} $query): ?{Entity}DTO
    {
        $entity = $this->repository->findById($query->identifier);
        if ($entity === null) {
            return null;
        }

        return {Entity}DTO::fromEntity($entity);
    }
}

DTO Pattern

namespace App\Application\{Module}\DTO;

final readonly class {Entity}DTO
{
    public function __construct(
        public string $id,
        public string $field1,
        public string $field2,
    ) {
    }

    public static function fromEntity(/* entity */): self
    {
        return new self(
            id: (string) $entity->id(),
            field1: $entity->field1(),
            field2: $entity->field2(),
        );
    }
}

References

See references/ for detailed guides:

  • command-patterns.md — Full command examples with validation
  • query-patterns.md — Query patterns with pagination and filtering
  • bus-configuration.md — Messenger bus setup and middleware

Keep looking

Skills are one crate of 328,083. Ordering is by how many stacks a row turns up in, so the top of any crate is what has actually been picked rather than what has the most stars.