external atom Tag id "atom:tag";
external atom Task id "atom:task";

interface ProjectActions id "interface:project-actions" revision "interface:project-actions@1" {
  operation addTask id "member:project-actions:add-task" : string -> atom-ref<Task> {
    call id "operation:project-actions:add-task";
  }
  operation addTag id "add-tag" : string -> atom-ref<Tag> { call id "add-tag:call"; }
}