import type { DatabaseSync } from "node:sqlite";
import type { Context } from "@/types";
import type { SignalSubscriptionDbRecord } from "./databaseTypes.js";
/**
 * Signal subscriptions repository backed by SQLite with write-through caching.
 * Expects: schema migrations already applied for signals_subscriptions.
 */
export declare class SignalSubscriptionsRepository {
    private readonly db;
    private readonly subscriptionsByKey;
    private readonly subscriptionLocks;
    private readonly cacheLock;
    private readonly createLock;
    private allSubscriptionsLoaded;
    constructor(db: DatabaseSync);
    create(record: SignalSubscriptionDbRecord): Promise<void>;
    delete(ctx: Context, pattern: string): Promise<boolean>;
    findByUserAndAgent(ctx: Context, pattern: string): Promise<SignalSubscriptionDbRecord | null>;
    findMany(): Promise<SignalSubscriptionDbRecord[]>;
    findMatching(ctx: Context, signalType: string): Promise<SignalSubscriptionDbRecord[]>;
    private subscriptionCacheSet;
    private subscriptionLoadByKey;
    private subscriptionParse;
    private subscriptionLockForKey;
}
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