fastify-ws

Basic WebSocket support for Fastify built on the ws and uws libraries. Current stable version is 1.0.3, with infrequent releases. It provides a simple plugin to add WebSocket functionality to Fastify, exposing a `fastify.ws` WebSocket.Server instance. Supports both `ws` (default) and `uws` backends, but `uws` is abandoned. Differentiator: minimal plugin for legacy Fastify versions, but not actively maintained and lacks full lifecycle management compared to @fastify/websocket.