export declare const CLIENT_SECRET = "test-client-secret";
/** HMAC-SHA256 signs a raw body with the test client secret (or an override). */
export declare function sign(body: string, secret?: string): string;
/**
 * Snake_case task payload matching the v1 webhook wire shape.
 */
export declare function rawTask(overrides?: Record<string, unknown>): Record<string, unknown>;
/**
 * Wraps an event's `event_data` in the snake_case envelope the backend sends
 * (initiator, version, timestamps, etc). `extra` passes extra top-level keys
 * like `event_data_extra`.
 */
export declare function envelope(event: string, eventData: unknown, extra?: Record<string, unknown>): Record<string, unknown>;