/**
 * Array source detection for iteration patterns.
 *
 * Locates prior step results that contain arrays matching the
 * iteration data, using key-overlap and length-match strategies.
 */
import type { ExtractedStepLike } from './types';
/**
 * Find a prior step whose result contains an array field that is the likely
 * data source for the iteration. Uses two strategies:
 *
 * 1. **Key overlap**: Array items have keys matching the iteration's varying keys
 *    (e.g., links[].href matches the varying key `url`)
 * 2. **Length match**: Array length matches the run length (fallback)
 *
 * Searches recursively through nested objects, returning a dot-path
 * (e.g., "links") so the YAML mapping references the correct depth.
 */
export declare function findArraySource(steps: ExtractedStepLike[], runStartIndex: number, runLength: number, varyingKeys?: string[]): {
    stepIndex: number;
    fieldName: string;
} | null;