/**
 * @license
 * Copyright 2025 Vybestack LLC
 * SPDX-License-Identifier: Apache-2.0
 */
/**
 * Length-prefixed framing protocol for credential proxy IPC.
 *
 * @plan PLAN-20250214-CREDPROXY.P03
 * @requirement R5.1, R5.2, R5.3
 * @pseudocode analysis/pseudocode/001-framing-protocol.md
 */
export declare const MAX_FRAME_SIZE = 65536;
export declare const PARTIAL_FRAME_TIMEOUT_MS = 5000;
export declare class FrameError extends Error {
    constructor(message: string);
}
export declare function encodeFrame(payload: Record<string, unknown>): Buffer;
export interface FrameDecoderOptions {
    /**
     * Called when a partial frame times out. The buffer is reset after this
     * callback returns. Use this to close the connection or log the error.
     */
    onPartialFrameTimeout?: () => void;
}
export declare class FrameDecoder {
    private buffer;
    private partialFrameTimer;
    private readonly onPartialFrameTimeout?;
    constructor(options?: FrameDecoderOptions);
    feed(chunk: Buffer): Array<Record<string, unknown>>;
    reset(): void;
    private startPartialFrameTimer;
    private cancelPartialFrameTimer;
}