import { EventEmitter } from "node:events";
export interface LogLine {
    ts: string;
    level: string;
    msg: string;
    [key: string]: unknown;
}
/**
 * In-memory log fanout. The logger writes every line to stderr (for
 * Docker's log driver to pick up) AND appends it to this bus so the
 * dashboard's `/api/logs/stream` SSE endpoint can serve them live.
 *
 * The ring buffer keeps the last N lines so a newly-connected client
 * gets recent context without having to tail the container log file.
 */
export declare class LogBus extends EventEmitter {
    private readonly capacity;
    private readonly ring;
    constructor(capacity?: number);
    append(line: LogLine): void;
    recent(limit?: number): LogLine[];
}
export declare function getSharedLogBus(): LogBus;
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