export interface ModelSelectionSpanAttributes {
    'model.selected': string;
    'model.provider': string;
    'model.score': number;
    'model.dimension'?: string;
    'model.alternatives_count': number;
    'model.constraints'?: string;
    'model.selection_duration_ms': number;
    'model.reason': string;
}
export interface ModelSelectionSpanInput {
    modelId: string;
    providerKey: string;
    score: number;
    dimension?: string;
    alternativesCount: number;
    constraints?: Record<string, unknown>;
    reason: string;
}
/**
 * Trace a model selection decision as an OpenTelemetry span.
 *
 * Wraps an async operation (typically the selector call) and records
 * the selection result as span attributes for distributed tracing.
 */
export declare function traceModelSelection<T>(fn: () => Promise<T>, input: ModelSelectionSpanInput): Promise<T>;