import type { Collector, TelescopeStorage } from '../types.js';
export declare class SyncCollector implements Collector {
    private readonly storage;
    private readonly awarenessSampleMs;
    readonly name = "Sync Collector";
    readonly type: "sync";
    /** `(docName + '\u0000' + clientId)` → last awareness sample timestamp (ms) */
    private awarenessLastSampleAt;
    constructor(storage: TelescopeStorage, awarenessSampleMs?: number);
    register(): Promise<void>;
    private record;
}
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