import type { DatabaseSync } from "node:sqlite";
import type { Context } from "@/types";
import type { HeartbeatTaskDbRecord } from "./databaseTypes.js";
/**
 * Heartbeat tasks repository backed by SQLite with write-through caching.
 * Expects: schema migrations already applied for tasks_heartbeat.
 */
export declare class HeartbeatTasksRepository {
    private readonly db;
    private readonly tasksById;
    private readonly taskLocks;
    private readonly cacheLock;
    private readonly createLock;
    private readonly runLock;
    private allTasksLoaded;
    constructor(db: DatabaseSync);
    findById(id: string): Promise<HeartbeatTaskDbRecord | null>;
    findMany(ctx: Context): Promise<HeartbeatTaskDbRecord[]>;
    findAll(): Promise<HeartbeatTaskDbRecord[]>;
    create(record: HeartbeatTaskDbRecord): Promise<void>;
    update(id: string, data: Partial<HeartbeatTaskDbRecord>): Promise<void>;
    delete(id: string): Promise<boolean>;
    recordRun(runAt: number): Promise<void>;
    private taskCacheSet;
    private taskLoadById;
    private taskParse;
    private taskLockForId;
}
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