/**
 * Length-prefixed JSON framing for stream transports (Unix socket, named pipe).
 *
 * Wire format:
 *   [4 bytes big-endian uint32 body length] [UTF-8 JSON body]
 *
 * The 4-byte prefix excludes itself. Max body length is capped to avoid
 * unbounded memory growth on malformed / hostile input.
 */
export declare const MAX_FRAME_BYTES: number;
export declare function encodeFrame(message: unknown): Buffer;
/**
 * Streaming decoder that buffers partial chunks and emits complete frames.
 *
 * Usage:
 *   const dec = new FrameDecoder()
 *   socket.on('data', chunk => {
 *     for (const msg of dec.push(chunk)) handle(msg)
 *   })
 */
export declare class FrameDecoder {
    private buffer;
    private expected;
    /** Push a chunk and yield any complete decoded messages. */
    push(chunk: Buffer): Generator<unknown, void, void>;
    /** Reset decoder state (e.g. after socket reconnect). */
    reset(): void;
    /** Number of bytes currently buffered but not yet a complete frame. */
    get buffered(): number;
}
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