import scala.annotation.StaticAnnotation
class query extends StaticAnnotation
class command extends StaticAnnotation

import io.circe.generic.JsonCodec

@JsonCodec case class GenericError(
  message: String = "",
  code: Int = 500
)

trait Controller[F[_]] {
  @query
  def getSomething(arg: String): F[Either[GenericError, Result]]

  @command
  def doSomething(arg: Content): F[Either[GenericError, Result]]
}