import type { Logger } from "./snapshot.js";
/**
 * Structured logger that writes one JSON line per event to stderr.
 * MCP uses stdout for the protocol; all connector-side logs MUST go to stderr.
 *
 * Never log snapshot YAML, URL path beyond the redacted form, API keys, or raw
 * bearer tokens. Category counts (redaction_stats) are fine per contract §4.2.
 */
export declare function makeStderrLogger(prefix?: string): Logger;