/**
 * CLS Span model — each span is one JSON log entry in Tencent Cloud CLS.
 * Aligned with the CLS GenAI observability specification (5-layer model):
 *   entry → agent → step → chat/tool
 */
export interface CLSSpanAttributes {
    [key: string]: string | number | boolean;
}
export interface CLSSpan {
    /** 5-layer span semantic kind: entry | agent | step | chat | tool */
    spanKind: string;
    /** 32-char hex trace ID */
    traceID: string;
    /** 16-char hex span ID */
    spanID: string;
    /** 16-char hex parent span ID, empty for root */
    parentSpanID: string;
    /** Session ID for cross-trace correlation */
    sessionID: string;
    /** Agent ID */
    agentID: string;
    /** Parent agent ID (for subagents) */
    parentAgentID: string;
    /** Step ID */
    stepID: string;
    /** Human-readable span name */
    name: string;
    /** OTel span kind: INTERNAL | CLIENT | SERVER */
    kind: string;
    /** Status code: OK | ERROR | UNSET */
    statusCode: string;
    /** Error description */
    statusMessage: string;
    /** Start time (nanosecond epoch string) */
    start: string;
    /** End time (nanosecond epoch string) */
    end: string;
    /** Duration (nanoseconds string) */
    duration: string;
    /** Duration in milliseconds */
    durationMs: string;
    /** Host name */
    host: string;
    /** Service name */
    service: string;
    /** Links JSON array string */
    links: string;
    /** L2/L3/L4/L5 nested attributes */
    attribute: CLSSpanAttributes;
}
/** Create a new empty CLS span with defaults. */
export declare function createCLSSpan(): CLSSpan;
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