class FileSystem(ABC):
    @abstractmethod
    def read(self, path: str) -> str:
        """Lê conteúdo do arquivo"""
        pass
    
    @abstractmethod
    def write(self, path: str, content: str):
        """Escreve conteúdo no arquivo"""
        pass
    
    @abstractmethod
    def exists(self, path: str) -> bool:
        """Verifica se arquivo existe"""
        pass
    
    @abstractmethod
    def mkdir(self, path: str):
        """Cria diretório"""
        pass

from squidy.adapters.filesystem.local_fs import LocalFileSystem

fs = LocalFileSystem()
content = fs.read("./readme-agent.md")

from squidy.adapters.filesystem.mock_fs import MockFileSystem

fs = MockFileSystem()
fs.write("/test/file.md", "conteúdo")
assert fs.exists("/test/file.md")

# Produção
use_case = InitUseCase(fs=LocalFileSystem())

# Teste
use_case = InitUseCase(fs=MockFileSystem())