import type { Formatter } from './types';
/**
 * Pino-compatible formatter — emits the line shape the Pino ecosystem
 * (pino-pretty, transports, processors) expects: numeric `level`, epoch-ms
 * `time`, `msg`, and a nested `err` object.
 *
 * `pid`/`hostname` are NOT added here — that keeps the library free of a
 * `node:os` import. Pino treats them as base bindings; supply them via the
 * logger context if you want them on every line:
 *
 *   import os from 'node:os'
 *   new Logger({ pid: process.pid, hostname: os.hostname() }, ...)
 */
export declare const Pino: Formatter;