fs

type FileSystem interface {
	// File operations
	WriteFile(name string, data []byte, perm fs.FileMode) error
	ReadFile(name string) ([]byte, error)
	Remove(name string) error

	// Directory operations
	MkdirAll(path string, perm fs.FileMode) error
	ReadDir(name string) ([]fs.DirEntry, error)
	TempDir() string

	// File system queries
	Stat(name string) (fs.FileInfo, error)
	Exists(path string) bool

	// fs.FS compatibility - allows use with fs.WalkDir
	Open(name string) (fs.File, error)
}

type OSFileSystem struct{}