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create-use-case

@Dev-Int/tests
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Create a new business use case (Request + UseCase + Test) following TDD workflow. Use when user asks to implement new business logic, domain operations, or create commands/queries. Always follow Red-Green-Refactor cycle.

Install Skill

1Download skill
2Enable skills in Claude

Open claude.ai/settings/capabilities and find the "Skills" section

3Upload to Claude

Click "Upload skill" and select the downloaded ZIP file

Note: Please verify skill by going through its instructions before using it.

SKILL.md

name create-use-case
description Create a new business use case (Request + UseCase + Test) following TDD workflow. Use when user asks to implement new business logic, domain operations, or create commands/queries. Always follow Red-Green-Refactor cycle.

Create Use Case

Generate Request, UseCase, and Test following TDD workflow.

IMPORTANT: Always uses tdd-workflow skill (MANDATORY)

When to Use

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

Inputs/Outputs

Input Example Output
bc Admin BC/UseCases/Entity/ActionEntity/
entity Article ActionEntity.php (UseCase)
action Rename ActionEntityRequest.php (Request)
fields ['name'] ActionEntityTest.php (Test)

Process

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

Phase File Template
RED Test.php .claude/templates/test-unit.php.tpl
GREEN Request.php + UseCase.php .claude/templates/request.php.tpl, use-case.php.tpl
REFACTOR - make cs-fixer && make stan && make ta
VALIDATE - make qa

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).

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()

Templates

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

Location: .claude/templates/

References

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