export interface ParallelGroupOptions {
    groupLabel: string;
    persistent?: boolean;
    preferredHarness?: string | string[];
}
/**
 * Runs thunks as a named parallel group with a shared effectGroupId.
 * Supports preferred harness assignment (single string or round-robin array).
 */
export declare function runParallelGroup<T>(thunks: Array<() => T | Promise<T>>, options: ParallelGroupOptions): Promise<T[]>;
/**
 * Fan-out pattern: maps each item through a function, collecting results or
 * pending effects as a group with a shared effectGroupId.
 */
export declare function runParallelFanOut<TItem, TOut>(items: TItem[], fn: (item: TItem) => TOut | Promise<TOut>, _options: ParallelGroupOptions): Promise<TOut[]>;
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