/**
 * Fired on the {@link Engine} when a workflow's search attributes are updated
 * via `engine.setAttributes` or `ctx.setAttribute`. Read `e.changes` for the
 * map of attribute keys to their new values.
 *
 * @example
 * ```ts
 * import { Engine, AttributesChangedEvent } from '@lostgradient/weft';
 *
 * const engine = new Engine();
 * engine.addEventListener(AttributesChangedEvent.type, (event) => {
 *   console.log('attributes changed for', event.workflowId, event.changes);
 * });
 * ```
 */
export declare class AttributesChangedEvent extends Event {
    static readonly type: "attributes:changed";
    readonly workflowId: string;
    readonly changes: Record<string, unknown>;
    constructor(workflowId: string, changes: Record<string, unknown>);
}