/**
 * Entity Hygiene Step — ported from KB sleep/steps/entity-hygiene.ts.
 *
 * Cleans the entity graph by:
 * 1. Removing transcription artifacts (Speaker 0, Speaker 1, Unknown, etc.)
 * 2. Pruning low-value noise (entities with 1 mention and a name matching a
 *    stop-word list) — mirrors KB's pruneMinAgeDays logic adapted for Arcana
 *    which lacks entity createdAt (KB uses the graph DB timestamp).
 *
 * Full AI-powered merge detection (KB's step 2/3) is deferred to v2 sleep —
 * it requires a more complex LLM loop that KB drives via mergeEntities() +
 * entity-graph.ts. For v1, automatic artifact removal + mention-based pruning
 * achieves the primary noise-reduction goal.
 *
 * Adapter note: KB uses getEntityGraphDb + mergeEntities + deleteEntity from
 * entity-graph.ts. Arcana uses deps.structured.listEntities + deleteEntity.
 */
import type { MaintainDeps } from '../index.js';
import type { SleepConfig } from '../config.js';
export interface EntityHygieneResult {
    count: number;
    artifactsCleaned: number;
    pruned: number;
    processed: number;
    errors?: string[];
}
export declare function runCleanEntityGraph(deps: MaintainDeps, config: SleepConfig): Promise<EntityHygieneResult>;
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