import type { WorkerRunResult } from '../../../types/index.js';
/**
 * Worker handler for auto-drift detection.
 *
 * Triggered on source file changes. For each spec in 'implementing' or 'done'
 * state, computes a lightweight drift score. If score >= PLANU_DRIFT_THRESHOLD,
 * persists the result to DriftCacheStore with shown=false so the next tool call
 * can display a banner warning.
 *
 * Respects PLANU_AUTO_DRIFT=false to disable entirely.
 */
export declare function runAutoDrift(projectDir: string, changedFiles?: string[]): Promise<WorkerRunResult>;
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