Exactly-once delivery counter using Watermill messaging library

In plain words

This is a code example demonstrating exactly-once message delivery using the Watermill messaging library. It shows developers how to implement reliable message processing where each message is guaranteed to be delivered and processed only once. The project is hosted on GitHub and targets software engineers building message-driven systems who need to ensure data consistency and avoid duplicate processing across distributed applications.

written from the facts on this page · September 2026

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