import type { InstanceStatus, RunGroup, RunGroupStatus, RunInstance } from "@skaile/workspaces/types";
/**
 * Counters per status plus the group-status transition to apply
 * (null = none). Batch only, when all instances are terminal: any failed
 * -> `failed`; else all cancelled (no completes) -> `cancelled`; else
 * `complete` (mixed complete + cancelled counts as `complete`). `active`
 * is the reverse transition after retry_instance re-queues on a terminal
 * group - deliberately only from `complete`/`failed`: a `cancelled` group
 * never reactivates (cancel_group is a final host command; a cancelled
 * group's instances cannot be retried). Standing groups never
 * auto-transition (pause/close are host commands). Rollup owns
 * reactivation - hosts re-run it after every mutation, including retries.
 */
export declare function rollup(group: RunGroup, instances: RunInstance[]): {
    counters: Record<InstanceStatus, number>;
    groupStatus: RunGroupStatus | null;
};
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