/**
  WebSocket middleware: development mode only.

  Handles WebSocket connections using the Kitten `ws` mixin to implment hot reload functionality along with the client-side Kitten development time script that’s injected into pages during development.

  On connection, sends server’s boot ID so development-time clients can reliably detect server restarts (the boot ID changes across process starts).

  @returns {import('polka').Middleware<any>}
*/
import type { NextHandler } from 'polka';
import type { KittenRequest, KittenResponse, WebSocket } from '../types/index.ts';
export default function (): (request: KittenRequest & {
    ws?: () => Promise<WebSocket>;
}, _response: KittenResponse, next: NextHandler) => Promise<void>;