/** Default cap on queued OpenCode events per loop/swarm runner (prevents unbounded memory growth). */
export declare const DEFAULT_MAX_EVENT_QUEUE_SIZE = 10000;
/**
 * Serializes async event processing. Concurrent `push` callers each await full drain
 * completion (no lost wakeups). Replaces recursive `drainQueue` patterns that could
 * return early while another drain was in flight.
 */
export declare function createAsyncEventQueue(processor: (event: unknown) => Promise<void>, maxSize?: number): {
    push: (event: unknown) => Promise<void>;
    readonly size: number;
};
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