/**
 * @module
 * Shared lifecycle hook invocation for mailer and channel senders.
 * Hook failures are swallowed so they never break the send path.
 */
/**
 * Invoke a lifecycle hook without letting hook failures break the send.
 * In non-production environments, hook errors are logged with `console.warn`.
 *
 * @typeParam T - Hook argument tuple types.
 * @param hook - Optional sync or async hook callback.
 * @param args - Arguments forwarded to the hook.
 */
export declare function invokeHook<T extends unknown[]>(hook: ((...args: T) => void | Promise<void>) | undefined, ...args: T): Promise<void>;