import type { ToolResult } from '../types.js';
export interface CallRecord {
    tool: string;
    ok: boolean;
    ms: number;
    t: number;
    errorType?: string;
    msg?: string;
}
export interface CallStats {
    total: number;
    success: number;
    fail: number;
    topTools: Array<{
        name: string;
        n: number;
        fail: number;
    }>;
    recentErrors: Array<{
        tool: string;
        type: string;
        msg: string;
        ms: number;
    }>;
}
/**
 * CallRecorder — 进程内工具调用记录器（模块级单例）。
 *
 * defect 标注：命中 module-level-mutable-state(open) 形态。同步操作无真实竞态，
 * 风险可接受；record/getStats 预留可选 instanceId 参数，为多实例 per-instance 扩展铺路（MVP 全局共享）。
 */
declare class CallRecorder {
    private recent;
    private recentErrors;
    private byTool;
    private total;
    private success;
    private fail;
    private startTime;
    constructor();
    record(tool: string, ok: boolean, ms: number, errorType?: string, msg?: string, _instanceId?: string): void;
    getRecent(n: number, _instanceId?: string): CallRecord[];
    getStats(_instanceId?: string): CallStats;
    reset(): void;
}
export declare function getCallRecorder(): CallRecorder;
/** 从工具 result 提取错误文本（截断 MSG_TRUNCATE 字符）。 */
export declare function extractErrorMessage(result: ToolResult): string;
export {};