import type { ActivityOptions } from '../types.js';
/**
 * @Activity() decorator — can be used on a class (to group activities)
 * or on individual methods.
 *
 * When used on a class, all public async methods become activities.
 * When used on a method, only that method is registered.
 *
 * Usage:
 * ```typescript
 * // Class-level: all methods become activities
 * @Activity({ taskQueue: 'my-queue' })
 * class MyActivities {
 *   async processOrder(order: Order): Promise<Result> { ... }
 *   async sendEmail(to: string, body: string): Promise<void> { ... }
 * }
 *
 * // Method-level: individual activity with options
 * class MyActivities {
 *   @Activity({ retry: { maxAttempts: 5 } })
 *   async riskyOperation(): Promise<void> { ... }
 * }
 * ```
 */
export declare function Activity(options?: ActivityOptions): (target: any, propertyKeyOrContext?: string | ClassMethodDecoratorContext | ClassDecoratorContext, descriptor?: PropertyDescriptor) => any;