@spec plan(
  term(),
  keyword()
) :: {:ok, PromptRunner.Plan.t()} | {:error, term()}

@spec run(
  term(),
  keyword()
) :: {:ok, PromptRunner.Run.t()} | {:error, term()}

@spec run_prompt(
  String.t(),
  keyword()
) :: {:ok, PromptRunner.Run.t()} | {:error, term()}

@spec scaffold(
  term(),
  keyword()
) :: {:ok, map()} | {:error, term()}

@spec validate(
  term(),
  keyword()
) :: :ok | {:error, term()}