export type LegacyReportDomain = 'report' | 'doctor' | 'observe-health' | 'observe-inbox';
/**
 * One-shot migration for pre-`.report.json` run artifacts.
 *
 * This is deliberately scoped to measurement report directories. It does not make
 * bare `.json` a normal reader format again; it just renames known legacy report
 * files into the canonical name so old local data can be discovered, rotated, and
 * eventually garbage-collected by the new code paths.
 */
export declare function migrateLegacyReportFiles(dir: string, domain: LegacyReportDomain): void;