export interface MigrateOptions {
    /**
     * Whether the consumer renders text with the modern engines (HTML /
     * render-tag). Two migrations only make sense there, and the editor can still
     * be switched to the legacy Konva.Text renderer. Defaults to true because
     * every converter uses the modern path; the editor passes its actual flag.
     */
    modernTextRenderer?: boolean;
    /**
     * The v2→3 background policy. Three states, no new argument needed:
     *
     * - `undefined` (default) — **auto**: infer the pre-v3 renderer from the
     *   design, as `usesRichTextEditor` below explains.
     * - `true` — **per-line**: never stamp; every pre-v3 background renders as
     *   the per-line polygon.
     * - `false` — **full-rect**: always stamp; every pre-v3 background renders as
     *   a full rect. The escape hatch for a rich-text client whose designs happen
     *   to hold only bare strings, which auto cannot tell from a plain design.
     */
    modernizeTextBackground?: boolean;
}
/**
 * Bring a design up to `CURRENT_SCHEMA_VERSION`. Returns a new object; the
 * input is never mutated. A design already at the current version is returned
 * unchanged apart from the clone.
 */
export declare function migrateDesign<T>(json: T, options?: MigrateOptions): T;