@type t() :: %OpenCode.Generated.SubtaskPart{
  agent: String.t(),
  command: String.t() | nil,
  description: String.t(),
  id: String.t(),
  message_id: String.t(),
  model: OpenCode.Generated.SubtaskPartModel.t() | nil,
  prompt: String.t(),
  session_id: String.t(),
  type: String.t()
}