export interface StaleFlagMatch {
    filePath: string;
    line: number;
    /** The exact matched substring, useful for the finding message. */
    excerpt: string;
}
/**
 * Search the user's project for the legacy CDK Stack prop
 * `crossRegionReferences: true`. Returns the first match found, or null
 * when nothing is detected. Search is bounded to `bin/`, `lib/`, `src/`
 * (if they exist) and stops at the first hit.
 */
export declare const findStaleCrossRegionFlag: (projectRoot: string, searchDirs?: string[]) => StaleFlagMatch | null;