import { DurableActivityContext } from '../../types/durable';
/**
 * The activity-internal API surface, exposed as `Durable.activity`. Methods
 * on this class are designed to be called **inside** an activity function —
 * they read from the activity's `AsyncLocalStorage` context that is populated
 * by the activity worker before invoking the user's function.
 *
 * ## Usage
 *
 * ```typescript
 * import { Durable } from '@hotmeshio/hotmesh';
 *
 * export async function processData(data: string): Promise<string> {
 *   const ctx = Durable.activity.getContext();
 *   console.log(`Activity ${ctx.activityName} for workflow ${ctx.workflowId}`);
 *   console.log(`Metadata:`, ctx.headers);
 *   return `Processed: ${data}`;
 * }
 * ```
 */
export declare class ActivityService {
    /**
     * Returns the current activity's execution context. Only available
     * inside an activity function invoked by the durable activity worker.
     *
     * @returns The activity context including name, args, metadata, and parent workflow info.
     * @throws If called outside of an activity execution context.
     */
    static getContext(): DurableActivityContext;
}