import { ICommonTargetOptions, ILogEntry, LogTarget } from "@spinajs/log-common";
/**
 * Emits NDJSON ( newline-delimited JSON ) to stdout for machine ingestion:
 * one structured JSON object per log entry instead of a formatted string, so
 * log collectors ( Loki, Elastic, Datadog, container stdout ) can index fields
 * directly rather than regex-parsing a layout.
 *
 * The inherited `layout` option is intentionally IGNORED - JSON is not a string
 * layout. `time` is stamped at write; because this target is synchronous /
 * unbuffered that is ~event time. An event-time-stamped, file-backed variant
 * will come with the batching base in a later phase.
 */
/**
 * Options for {@link JsonTarget}.
 */
export interface IJsonTargetOptions extends ICommonTargetOptions {
    /**
     * Which stream to write to. A single stream is the 12-factor norm for machine
     * logs. Default is "stdout".
     */
    stream?: "stdout" | "stderr";
}
export declare class JsonTarget extends LogTarget<IJsonTargetOptions> {
    constructor(options: IJsonTargetOptions);
    write(data: ILogEntry): void;
}
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