import type { DB } from '../../data/db/index.js';
import { type TracePartitionConfig } from './plan.js';
export interface PartitionSyncSummary {
    readonly created: readonly string[];
    readonly dropped: readonly string[];
}
/**
 * Reconcile the trace tables' day partitions with the retention policy.
 *
 * `now` is injectable so the maintenance window is testable without mocking the
 * clock. Returns the names created and dropped so a job runner can record them.
 */
export declare function syncTracePartitions(db: DB, config: TracePartitionConfig, now?: Date): Promise<PartitionSyncSummary>;
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