> ## Documentation Index
> Fetch the complete documentation index at: https://docs.korve.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Queues

> Durable at-least-once work delivery with retries, batches, and dead-letter recovery.

Korve queues push signed HTTP deliveries to a handler in your deployed application. Push removes the
need to run a polling worker and lets the platform schedule retries and concurrency. Delivery is at
least once, so handlers must make durable effects idempotent.

```bash theme={null}
korve queues create --data @queue.json
korve queues publish emails --data '{"body":{"userId":"u_123"},"idempotencyKey":"welcome:u_123"}'
korve queues stats emails
```

`queue.json` declares a name, environment, consumer path, retention, batch size/wait, retry policy,
optional dead-letter queue, and optional concurrency cap. Publish batches contain at most 100
messages and are accepted atomically.

When retries are exhausted, inspect and deliberately replay or purge dead letters:

```bash theme={null}
korve queues dead-letters emails
korve queues replay-dead-letters emails --data '{"messageIds":["msg_123"]}' --yes
```

Use `@korve-dev/sdk` to publish and verify deliveries. See the [Runtime SDK](/sdk/runtime) and
[Queues API](/api-reference/queues).