Create Use Case

Create Use Case

Generate Request, UseCase, and Test following TDD workflow.

IMPORTANT: Always uses tdd-workflow skill (MANDATORY)

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When to Use

• New business logic
• Domain operations
• Commands (Create, Update, Delete, Rename)
• Queries (Find, List, Search)

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Inputs/​Outputs

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Process

Follow: .claude/​skills/​tdd-workflow/ (MANDATORY)

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Structures

Request (interface):

interface ActionEntityRequest {
    public function uuid(): ResourceId;
    public function field(): string;
}

UseCase (readonly, single execute()):

final readonly class ActionEntity {
    public function __construct(private EntityRepository $repo) {} // OR Finder
    public function execute(ActionEntityRequest $req): ActionEntityResponse {
        // Business logic
        return new ActionEntityResponse($entity);
    }
}

See: docs/​QUICK_REF.md#usecase-pattern for complete structure

Note: Project uses Request-Response pattern. Symfony Maker bin/​console make:use-case:create <bc> <name> generates all 3 files (Request, UseCase, Response).

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Rules

Repository vs Finder:

• Commands (CUD) → Repository
• Queries (R) → Finder

See: docs/​GLOSSARY.md#repository-vs-finder

Tests:

• Use DataBuilder (NOT Foundry)
• Mock: expects()->once()

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Templates

• test-unit.php.tpl
• request.php.tpl
• use-case.php.tpl

Location: .claude/​templates/

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References

• TDD workflow: .claude/​skills/​tdd-workflow/
• Quick pattern: docs/​QUICK_REF.md#usecase-pattern
• Architecture: docs/​architecture.md#usecase