export type AgentStdoutDumpReason = "complete" | "exit" | "fail";
export type AgentStdoutDumpInput = {
    backend: string;
    sessionId?: string;
    reason: AgentStdoutDumpReason;
    cmd: string;
    args: string[];
    cwd?: string;
    stdinLength?: number;
    stdinPreview?: string;
    stdout: string;
    stderr?: string;
    durationMs: number;
    exitCode?: number | null;
    signal?: string | null;
    linesCollected?: number;
};
export declare function isAgentStdoutDumpEnabled(): boolean;
export declare function getAgentStdoutLogFilePath(niubotHome?: string): string;
/** 将一轮 agent 子进程的完整 stdout 追加到独立日志（需 NIUBOT_DEBUG_AGENT_STDOUT=1）。 */
export declare function dumpAgentStdout(input: AgentStdoutDumpInput): string | undefined;