Changelog

Graceful shutdown waits for in-flight events to complete, then closes connections cleanly—no lost events, no crashes.

Error handling is explicit: catch failures at any stage, log them, and route bad events to a dead-letter queue without stopping the main pipeline.

const throttled = stream.throttle( rps: 100, burst: 200 ); const deduplicated = stream.dedup( key: 'event.id', window: 60000 );

Each event flows through a series of transformation stages, with built-in support for filtering, mapping, and conditional routing.

Changelog

The TypeScript types are fully inferred; no manual type assertions needed even with complex nested schemas.

stream.pipe(map(e => e.data), buffer(100, 5000), flatMap(batch => fetch('/api/bulk',  body: JSON.stringify(batch) ))).catch(console.error);

The core relaykit object is a lightweight wrapper that manages the lifecycle of your event stream.