/**
 * Tier Step — ported from KB sleep/steps/tier.ts.
 *
 * Moves memories between hot / warm / archive tiers:
 * - hot:     high priority, low decay, recently accessed
 * - warm:    moderate priority or moderate recency
 * - archive: low priority, high decay, or long-inactive
 *
 * Adapter note: KB reads from getTimelineDb directly. Arcana uses
 * deps.structured.listMemories + updateMemory.
 */
import type { MaintainDeps } from '../index.js';
import type { SleepConfig } from '../config.js';
export interface TierResult {
    count: number;
    errors?: string[];
}
export declare function runTierMemories(deps: MaintainDeps, config: SleepConfig): Promise<TierResult>;
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