/** A parsed traceparent — only the fields pipework actually wires through. */
export interface ParsedTraceparent {
    /** The W3C trace-id, formatted as a UUID for direct use in `trace.parent_id`. */
    readonly traceId: string;
}
/** Parses a `traceparent` header value; returns `null` for missing or malformed input. */
export declare function parseTraceparent(header: string | string[] | undefined): ParsedTraceparent | null;
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