@type t() ::
  %ArchAstro.SDK.Types.ChannelPayloads.ApiChatChannel.ApiChatForkThread.Response.Nested.ChatModelThreadParticipatingAgentsItemSourceSolutionSolutionTemplatesItemDetailsInvokeContract{
    input_schema:
      %{optional(String.t()) => ArchAstro.SDK.JSON.t()}
      | nil
      | ArchAstro.SDK.Unset.t(),
    participants:
      [
        ArchAstro.SDK.Types.ChannelPayloads.ApiChatChannel.ApiChatForkThread.Response.Nested.ChatModelThreadParticipatingAgentsItemSourceSolutionSolutionTemplatesItemDetailsInvokeContractParticipantsItem.t()
        | nil
      ]
      | nil
      | ArchAstro.SDK.Unset.t(),
    prefills:
      ArchAstro.SDK.Types.ChannelPayloads.ApiChatChannel.ApiChatForkThread.Response.Nested.ChatModelThreadParticipatingAgentsItemSourceSolutionSolutionTemplatesItemDetailsInvokeContractPrefills.t()
  }