Fastify Server-Sent Events (SSE) Plugin

fastify-sse-v2 is a Fastify plugin designed to streamline the implementation of Server-Sent Events (SSE) within a Fastify application. It augments the `FastifyReply` object with a `.sse()` method, enabling developers to send individual events or stream events from `AsyncIterable` or `EventEmitter` sources, thereby abstracting the underlying HTTP streaming complexities. The current stable version is 4.2.2, with releases occurring periodically, typically every few months, to address bug fixes and introduce minor features. A primary differentiator is its seamless integration with Fastify's reply object and robust support for modern async/await patterns in event streaming. It also provides configurable options for `retryDelay` to manage client reconnection logic and `highWaterMark` to control internal stream buffering, offering fine-grained control over SSE behavior.