import type { WorkflowOptions, CronOptions } from '../types.js';
/**
 * @Workflow() class decorator — marks a class as a durable workflow.
 *
 * Usage:
 * ```typescript
 * @Workflow({ taskQueue: 'my-queue' })
 * class MyWorkflow {
 *   @Run()
 *   async execute(input: MyInput): Promise<MyOutput> { ... }
 * }
 * ```
 */
export declare function Workflow(options: WorkflowOptions): <T extends new (...args: any[]) => any>(target: T, context?: ClassDecoratorContext) => T;
/**
 * @Run() method decorator — marks the workflow entry point method.
 *
 * Each workflow class must have exactly one @Run() method.
 * This method receives the workflow input and returns the workflow output.
 */
export declare function Run(): (target: any, propertyKeyOrContext: string | ClassMethodDecoratorContext, descriptor?: PropertyDescriptor) => void;
/**
 * @Signal(name) method decorator — registers a signal handler.
 *
 * Signal handlers are invoked when an external signal is sent to the workflow.
 */
export declare function Signal(signalName: string): (target: any, propertyKeyOrContext: string | ClassMethodDecoratorContext, descriptor?: PropertyDescriptor) => void;
/**
 * @Query(name) method decorator — registers a query handler.
 *
 * Query handlers return read-only state without modifying the workflow.
 */
export declare function Query(queryName: string): (target: any, propertyKeyOrContext: string | ClassMethodDecoratorContext, descriptor?: PropertyDescriptor) => void;
/**
 * @Cron(cronExpr, options?) class decorator (P6.4) — registers a workflow to
 * run on a cron schedule. The schedule itself is durable server-side state
 * (a `schedules` row); this decorator only attaches the metadata the SDK
 * needs to upsert it. Actual registration happens when a `Worker` for this
 * workflow's task queue starts (`Worker.run()` calls `registerSchedules()`),
 * or explicitly via `WorkflowClient.upsertSchedule()`.
 *
 * Usage:
 * ```typescript
 * @Workflow({ taskQueue: 'reports' })
 * @Cron('0 0 * * *')  // once a day at midnight (standard 5-field cron)
 * class DailyReportWorkflow {
 *   @Run()
 *   async execute(input: ReportInput): Promise<void> { ... }
 * }
 * ```
 */
export declare function Cron(cronExpr: string, options?: Omit<CronOptions, 'cron'>): <T extends new (...args: any[]) => any>(target: T, context?: ClassDecoratorContext) => T;