Problem
Many Symfony projects become difficult to maintain as business logic is tightly coupled to the framework, making testing, evolution, and technology changes unnecessarily expensive.

Stack
PHP 8.4, Symfony 7, Doctrine ORM, PHPUnit, Docker

Key decision
Applied Clean Architecture by enforcing strict dependency inversion: the Domain and Application layers never depend on Symfony or Doctrine, while framework-specific code is isolated in Infrastructure. This makes business logic independently testable and allows technical components to be replaced with minimal impact.

Metrics tracked
Architecture dependency compliance, unit test coverage, framework-independent business logic, and use case isolation.

Result
A proof of concept demonstrating how to build framework-agnostic Symfony applications with Clean Architecture, serving as a practical foundation for scalable, maintainable enterprise software.