/**
 * Per-harnessSessionId monotonic sequence counter for AnalyticsEvent.seq.
 * Assigned server-side (in the ingest path), never by the hook script —
 * emit.cjs invocations race across concurrent hooks and can't be trusted
 * to self-order.
 */
export interface SeqCounter {
    /** Returns 1 on first call for a given harnessSessionId, incrementing from there. */
    next(harnessSessionId: string): number;
    /** Drop the counter for a session (e.g. once it's known to have ended). */
    reset(harnessSessionId: string): void;
}
export declare function createSeqCounter(): SeqCounter;
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