/**
 * Universal pipeline: infer column mapping.
 * Level 1: Heuristics (SYNONYMS). Level 2: LLM (feature-flagged).
 */
import type { UniversalMapping } from './types';
export interface InferMappingInput {
    headers: string[];
    sampleRows: Record<string, string>[];
}
export interface InferMappingOutput {
    mapping: UniversalMapping;
    confidence: number;
    source: 'heuristic' | 'llm';
}
/**
 * Infer column mapping: heuristics first, then optional LLM if confidence low.
 */
export declare function inferMapping(input: InferMappingInput): Promise<InferMappingOutput>;