function createCustomLlmMetric(params: CreateCustomLlmMetricParams): Promise<{
  cot_enabled?: null | boolean;
  finetuned_scorer?: null | {
    executor?:
      | null
      | "agentic_session_success"
      | "agentic_workflow_success"
      | "action_completion_luna"
      | "action_advancement_luna"
      | "bleu"
      | "chunk_attribution_utilization_luna"
      | "chunk_attribution_utilization"
      | "completeness_luna"
      | "completeness"
      | "context_adherence"
      | "context_adherence_luna"
      | "context_relevance"
      | "correctness"
      | "ground_truth_adherence"
      | "input_pii"
      | "input_sexist"
      | "input_sexist_luna"
      | "input_tone"
      | "input_toxicity"
      | "input_toxicity_luna"
      | "instruction_adherence"
      | "output_pii"
      | "output_sexist"
      | "output_sexist_luna"
      | "output_tone"
      | "output_toxicity"
      | "output_toxicity_luna"
      | "prompt_injection"
      | "prompt_injection_luna"
      | "prompt_perplexity"
      | "rouge"
      | "tool_error_rate"
      | "tool_error_rate_luna"
      | "tool_selection_quality"
      | "tool_selection_quality_luna"
      | "uncertainty";
    id: string;
    lora_task_id: number;
    name: string;
    prompt: string;
  };
  generated_scorer?: null | {
    chain_poll_template: {
      explanation_field_name?: string;
      metric_description?: null | string;
      metric_few_shot_examples?: object[];
      metric_system_prompt?: null | string;
      template: string;
      value_field_name?: string;
    };
    id: string;
    instructions?: null | string;
    name: string;
    user_prompt?: null | string;
  };
  id: string;
  input_type?:
    | null
    | "basic"
    | "llm_spans"
    | "retriever_spans"
    | "sessions_normalized"
    | "sessions_trace_io_only"
    | "tool_spans"
    | "trace_input_only"
    | "trace_io_only"
    | "trace_normalized"
    | "trace_output_only";
  model_name?: null | string;
  num_judges?: null | number;
  output_type?:
    | null
    | "boolean"
    | "categorical"
    | "count"
    | "discrete"
    | "freeform"
    | "percentage"
    | "multilabel";
  registered_scorer?: null | {
    id: string;
    name: string;
  };
  scoreable_node_types?: null | string[];
  version: number;
}>;