/**
 * FeltDB Adoption Telemetry
 *
 * Privacy-preserving, anonymous telemetry for adoption analytics.
 * No source code, project names, filesystem paths, or PII collected.
 * Fail-open: telemetry failures never affect FeltDB operation.
 */
/**
 * Telemetry event types
 */
export type TelemetryEventType = 'initialize' | 'write' | 'query' | 'sync' | 'agent_operation' | 'production_activity';
/**
 * Telemetry event payload
 */
export interface TelemetryEvent {
    event: TelemetryEventType;
    installation_id: string;
    core_version: string;
    runtime: 'node' | 'browser';
    os: string;
    timestamp: string;
}
/**
 * Telemetry client
 * Handles event collection and transport
 */
export declare class TelemetryClient {
    private identity;
    private enabled;
    private readonly batchSize;
    private eventQueue;
    private flushTimer;
    private coreVersion;
    private runtime;
    constructor(coreVersion?: string);
    /**
     * Emit a telemetry event
     */
    emit(eventType: TelemetryEventType): void;
    /**
     * Flush pending events to telemetry server
     */
    private flush;
    /**
     * Schedule a flush for pending events
     */
    private scheduleFlush;
    /**
     * Send events to telemetry server
     * Uses fire-and-forget with short timeout
     */
    private sendEvents;
    /**
     * Get normalized OS name
     */
    private getOS;
    /**
     * Enable telemetry
     */
    enable(): void;
    /**
     * Disable telemetry
     */
    disable(): void;
    /**
     * Check if telemetry is enabled
     */
    isEnabled(): boolean;
    /**
     * Force flush all pending events
     */
    forceFlush(): Promise<void>;
}
/**
 * Get or create global telemetry client
 */
export declare function getTelemetryClient(coreVersion?: string): TelemetryClient;
/**
 * Emit a telemetry event using global client
 */
export declare function emitTelemetry(eventType: TelemetryEventType): void;
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