/** Tracks agent runs that have emitted lifecycle `phase: start` without matching `end`/`error`. */
export declare function observeAgentEventForActiveRuns(evt: {
    stream: string;
    runId: string;
    data: Record<string, unknown>;
}): void;
export declare function getActiveRunIds(): string[];
export declare function getActiveRunCount(): number;
export declare function resetActiveRunsForTest(): void;
