import { randomUUID } from 'crypto';
import type { KnowledgeEntry, Experience, SkillRecord, EvolutionLog } from '../core/types';
export { randomUUID };
export interface BrainStoreOptions {
    dbPath: string;
}
export interface FtsResult {
    entry: KnowledgeEntry;
    rank: number;
}
export declare class BrainStore {
    private opts;
    private SQL;
    private db;
    private hasFts5;
    private ready;
    constructor(opts: BrainStoreOptions);
    init(): Promise<void>;
    private _createSchema;
    private ensureReady;
    upsert(entry: KnowledgeEntry): void;
    ftsSearch(query: string, limit?: number): FtsResult[];
    getAll(): KnowledgeEntry[];
    getById(id: string): KnowledgeEntry | null;
    countByLayer(): Record<string, number>;
    countBySource(): Record<string, number>;
    total(): number;
    avgMaturity(): number;
    lastEvolutionTime(): number | undefined;
    insertEvolutionLog(log: EvolutionLog): void;
    insertExperience(exp: Experience): void;
    insertSkill(skill: SkillRecord): void;
    persist(): void;
    close(): void;
}
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