import { chmodSync } from "node:fs";
import { appendFile } from "node:fs/promises";
import type { ProxyLifecycleEventInput, ProxyLifecycleLoggerOptions, ProxyLifecycleLoggerSnapshot } from "../types/index.js";
export declare function hashProxyLifecycleSessionId(sessionId: string | undefined): string | undefined;
/**
 * Configure private journal storage while retaining required admission
 * when initialization fails.
 */
export declare function configureProxyLifecycleLogger(options: ProxyLifecycleLoggerOptions): void;
/** Enqueue fixed-size lifecycle metadata without awaiting filesystem work. */
export declare function logProxyLifecycleEvent(input: ProxyLifecycleEventInput): void;
/** Confirm admission before upstream dispatch, without waiting for later traffic.
 * Disabled logging is explicit; an enabled but unhealthy sink refuses dispatch.
 * A timeout never retries an ambiguous provider request or the pending append.
 */
export declare function persistProxyLifecycleAcceptance(input: Omit<ProxyLifecycleEventInput, "event">, timeoutMs?: number): Promise<void>;
export declare function flushProxyLifecycleEvents(timeoutMs?: number): Promise<void>;
/**
 * Expose journal accounting, process identity, and outstanding writes
 * without changing them.
 */
export declare function getProxyLifecycleLoggerSnapshot(): ProxyLifecycleLoggerSnapshot;
/**
 * Reset timers, accounting, and injected I/O after isolated tests have
 * drained their work.
 */
export declare function resetProxyLifecycleLoggerForTests(): void;
/** Isolated failure injection for lifecycle durability tests. */
export declare const __proxyLifecycleTestHooks: {
    /**
     * Inject directory-hardening failures without altering real filesystem permissions.
     */
    setChmodForTests(chmod: typeof chmodSync): void;
    /**
     * Inject controlled append outcomes while preserving the production admission and queue paths.
     */
    setAppendFileForTests(append: typeof appendFile): void;
};