/** Minimal structured (JSON-line) logger. One line per event → stdout/stderr, scraper-friendly. */
export type LogLevel = "debug" | "info" | "warn" | "error";
export interface Logger {
    debug(msg: string, fields?: Record<string, unknown>): void;
    info(msg: string, fields?: Record<string, unknown>): void;
    warn(msg: string, fields?: Record<string, unknown>): void;
    error(msg: string, fields?: Record<string, unknown>): void;
}
export declare function createLogger(minLevel?: LogLevel): Logger;
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