/**
 * SQLite database wrapper for Signet
 * Runtime-detecting: uses bun:sqlite under Bun, better-sqlite3 under Node.js
 */
import type { Memory } from "./types";
import type { MemoryHistory, MemoryJob } from "./types";
declare function findSqliteVecExtension(): string | null;
/** Find the sqlite-vec native extension path, or null if unavailable. */
export { findSqliteVecExtension };
/**
 * Load sqlite-vec extension onto a database connection.
 * Returns true if the extension was loaded successfully.
 */
export declare function loadSqliteVec(db: unknown): boolean;
export declare class Database {
    private dbPath;
    private db;
    private options?;
    private vecEnabled;
    constructor(dbPath: string, options?: {
        readonly?: boolean;
    });
    init(): Promise<void>;
    /** Safe accessor that throws if db isn't initialized. */
    private getDb;
    addMemory(memory: Omit<Memory, "id" | "createdAt" | "updatedAt" | "version">): string;
    getMemories(type?: string): Memory[];
    getMemoryById(id: string): Memory | null;
    updateMemory(id: string, updates: Partial<Memory>): void;
    softDeleteMemory(id: string, deletedBy: string, reason?: string): void;
    recoverMemory(id: string, recoveredBy: string): void;
    addHistoryEvent(event: Omit<MemoryHistory, "id" | "createdAt">): string;
    getHistory(memoryId: string): MemoryHistory[];
    enqueueJob(job: Omit<MemoryJob, "id" | "createdAt" | "updatedAt" | "attempts">): string;
    leaseJob(jobType: string): MemoryJob | null;
    completeJob(id: string, result?: string): void;
    failJob(id: string, error: string): void;
    requeueDead(): number;
    close(): void;
}
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