import { Tracer, type SpanExporter } from '@basaltkit/core';
export declare const TRACER: import("@basaltkit/core").Token<Tracer>;
export interface TracingPluginOptions {
    serviceName?: string;
    exporter?: SpanExporter;
    tracer?: Tracer;
    flushIntervalMs?: number;
}
/**
 * Distributed tracing as a neutral pre/after hook: continues an inbound W3C
 * `traceparent`, records a server span per request, echoes `traceparent`, and
 * exports. Runs on Fastify, Express and Hono.
 */
export declare function tracingPlugin(options?: TracingPluginOptions): import("@basaltkit/core").BasaltPlugin<unknown>;