type LegacyStorageMigrationMode = "preserve" | "copy" | "transform";
interface LegacyStorageMigrationEntry {
    findingId: string;
    api: string;
    sourceKey: string | null;
    targetKey: string | null;
    dynamic: boolean;
    mode: LegacyStorageMigrationMode;
    preserveSource: boolean;
    backupRequired: boolean;
}
interface LegacyStorageMigrationManifest {
    manifestChecksum: string;
    storage: LegacyStorageMigrationEntry[];
}
interface LegacyStorageMigrationResult {
    status: "applied" | "already-applied" | "not-required";
    copied: number;
    backupKeys: string[];
}
interface LegacyStorageMigrationOptions {
    localStorage?: Storage | null;
    sessionStorage?: Storage | null;
}
/**
 * Low-level engine for a caller-verified, static, copy-only storage manifest.
 *
 * The operation preflights every source and target, writes a backup before any
 * target, never removes source keys, and rolls back newly created targets if a
 * write fails. The caller must establish manifest provenance with the migration
 * CLI before invoking this browser API. Transform migrations require app-owned
 * code and are rejected.
 */
declare function applyLegacyStorageMigration(manifest: LegacyStorageMigrationManifest, options?: LegacyStorageMigrationOptions): LegacyStorageMigrationResult;

export { type LegacyStorageMigrationEntry, type LegacyStorageMigrationManifest, type LegacyStorageMigrationMode, type LegacyStorageMigrationOptions, type LegacyStorageMigrationResult, applyLegacyStorageMigration };