import type { Logger } from './types.js';
export interface RcChildLog {
    write(chunk: string): void;
    close(): void;
}
export declare function createRcChildLog(opts: {
    logDir: string;
    /** sessionId when known, else the spawn unitToken. Names the log file. */
    id: string;
    logger: Logger;
    maxBytes?: number;
}): RcChildLog;
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