DF0076: WebSocket Upgrade Unsupported On This Runtime

Message

attach / handleUpgrade drive a raw node:http upgrade into crossws's Node adapter, which refuses to run on .

Cause

attach(server) and handleUpgrade(req, socket, head) hand a raw node:http upgrade socket to crossws's Node adapter. That adapter runs only on Node — Bun and Deno expose WebSockets as fetch upgrades through Bun.serve / Deno.serve instead, so there is no node:http upgrade socket for the adapter to take over.

Example

import { initHub } from '@devframes/hub/initiate'

// Running on Bun/Deno:
const hub = initHub({ base: '/__devframes/' })
hub.attach(myNodeHttpServer) // ✗ throws DF0076 on Bun/Deno

Fix

On Bun/Deno, serve the advertised __ws route from Bun.serve / Deno.serve and complete the upgrade with attachBunWsTransport / attachDenoWsTransport (see the hub-deno-minimal example), or connect over the SSE endpoint instead — it rides the instance's ordinary HTTP surface and needs no upgrade wiring. A side-car (ws: { sidecar: true }) also binds the native WebSocket adapter for you on its own port.

Source

• packages/devframe/src/node/instance-shell.ts — the shared instance shell throws this from attach / handleUpgrade on Bun/Deno, for both initDevframe and initHub.