import type { Database } from "./database.js";
export interface ConceptRecord {
    cluster_id: number;
    label: string;
    summary: string | null;
    tags: string | null;
    hub_file: string | null;
    member_count: number;
    content_hash: string;
    labeled_at: number;
}
export interface ConceptInsert {
    cluster_id: number;
    label: string;
    summary: string | null;
    tags: string[];
    hub_file: string | null;
    member_count: number;
    content_hash: string;
}
export declare class ConceptStore {
    private db;
    private upsertStmt;
    private getStmt;
    private getAllStmt;
    private deleteStmt;
    private upsertEmbeddingStmt;
    private getEmbeddingStmt;
    private getAllEmbeddingsStmt;
    private countStmt;
    constructor(db: Database);
    upsert(input: ConceptInsert, labeledAt?: number): void;
    get(clusterId: number): ConceptRecord | null;
    getAll(): ConceptRecord[];
    delete(clusterId: number): void;
    upsertEmbedding(clusterId: number, vector: Float32Array): void;
    getEmbedding(clusterId: number): Float32Array | undefined;
    getAllEmbeddings(): Map<number, Float32Array>;
    count(): number;
}
/**
 * Content hash for a cluster — drives the "re-label on change" decision.
 * Uses sorted member ids + their chunk count as a fingerprint. If a cluster
 * gains/loses members the hash changes; otherwise we can skip re-labeling.
 */
export declare function clusterContentHash(memberFileIds: number[], memberChunkCount: number): string;