/**
 * memory-journal-mcp - Worker Sandbox (worker_threads)
 *
 * Production-grade sandboxed execution using `node:worker_threads`.
 * Provides true V8 isolate boundary with resource limits,
 * hard timeouts, and MessagePort RPC bridge.
 */
import { type SandboxOptions, type PoolOptions, type SandboxResult } from './types.js';
/**
 * Worker-thread sandbox for secure code execution.
 * Maintains a persistent worker thread internally.
 */
export declare class WorkerSandbox {
    private readonly options;
    private worker;
    isBusy: boolean;
    readonly createdAt: number;
    lastUsedAt: number;
    private currentExecution;
    private executionId;
    get isDisposed(): boolean;
    constructor(options?: SandboxOptions);
    private initWorker;
    private handleWorkerDeath;
    dispose(): void;
    /**
     * Execute code in the worker thread with RPC bridge.
     */
    execute(code: string, apiBindings: Record<string, unknown>, schemas?: Record<string, Record<string, string>>, timeoutMs?: number, contextObj?: Record<string, unknown>, readonlyMode?: boolean, maxResultSizeOverride?: number): Promise<SandboxResult>;
}
/**
 * Pool of persistent worker-thread sandboxes with pre-warming
 * and lifecycle management (age recycling, idle eviction, re-warming).
 */
export declare class WorkerSandboxPool {
    private readonly options;
    private readonly sandboxOptions;
    private pool;
    private lifecycleTimer;
    constructor(sandboxOptions?: SandboxOptions, poolOptions?: PoolOptions);
    /**
     * Eagerly create workers up to `minInstances`.
     */
    private warmPool;
    /**
     * Periodic lifecycle sweep:
     * 1. Remove already-disposed workers
     * 2. Recycle workers that exceed maxWorkerAgeMs
     * 3. Evict idle workers (oldest first) above minInstances
     * 4. Re-warm pool to minInstances
     */
    private lifecycleSweep;
    execute(code: string, apiBindings: Record<string, unknown>, schemas?: Record<string, Record<string, string>>, timeoutMs?: number, contextObj?: Record<string, unknown>, readonlyMode?: boolean, maxResultSizeOverride?: number): Promise<SandboxResult>;
    getActiveCount(): number;
    dispose(): void;
    readonly poolId: `${string}-${string}-${string}-${string}-${string}`;
}
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