import type { LocalUsageStore } from './store.js';
/**
 * OpenClaw usage watcher
 *
 * 启动后:
 *   1. 扫现有 session/trajectory jsonl, 全量解析 (warm start)
 *   2. fs.watch 监听新文件 + 现有文件 append
 *   3. 增量解析 (记录每个 file 的最后 byte offset)
 *   4. 调 store.appendBatch 持久化
 */
export declare class OpenClawWatcher {
    private offsets;
    private watchers;
    private agentsDir;
    private agent_harness;
    private store;
    private verbose;
    constructor(opts: {
        store: LocalUsageStore;
        agentsDir?: string;
        verbose?: boolean;
    });
    /** 启动:warm-scan 现有文件 + 注册 fs.watch */
    start(): Promise<void>;
    /** 扫一次现有所有文件 (manual trigger, 用于 cron poll fallback) */
    scanAll(): Promise<number>;
    /** 关闭 watcher */
    stop(): void;
    private discoverUsageFiles;
    private scanFile;
    private eventToRecord;
    private sessionMessageToRecord;
    private registerWatchers;
    private log;
    private isUsageJsonlFile;
}
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