@spec force_continue(Riichi.Engine.State.t()) :: Riichi.Engine.eval_result()

@spec new(Riichi.Rules.t(), Riichi.Wall.t() | nil) :: Riichi.Engine.step()

@spec new_from_round(
  Riichi.Rules.t(),
  Riichi.Engine.State.RoundResult.t() | nil,
  Riichi.Wall.t() | nil
) ::
  Riichi.Engine.step()

@spec personalize_events(Riichi.Rules.t(), [Riichi.Event.t()]) :: %{
  required(Riichi.Actor.t()) => [Riichi.Event.t()]
}

@spec process_action(Riichi.Engine.State.t(), Riichi.Action.t()) ::
  Riichi.Engine.eval_result()

@spec skip(Riichi.Engine.State.t()) :: Riichi.Engine.eval_result()

@spec valid_actions(Riichi.Engine.State.t()) ::
  Riichi.Engine.ActionPredicate.valid_actions()