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

Metrics are published to standard formats (Prometheus, CloudWatch, DataDog) with zero configuration.

stream.on('*.created', async (event) =>  await db.insert('events', event); ,  concurrency: 50 );

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

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Batching is automatic—control it via `batch(100)` or `batch({ size: 50, timeoutMs: 1000 })` to trade latency for throughput.

const batch = stream.pipe(filter((e) => e.type === 'payment'), batch(100), debounce(5000));

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