/**
 * Validate stage: optional LLM review of generated YAML against intent.
 *
 * Checks for missing data flow connections, broken iteration sources,
 * and session handles that get lost mid-pipeline. Records issues as
 * informational warnings — does NOT modify the YAML.
 */
import type { PipelineContext } from '../types';
/**
 * Validate pipeline stage: optional LLM review.
 */
export declare function validate(ctx: PipelineContext): Promise<PipelineContext>;