[Event Sourcing] Building an Application Fast Using the Event Sourcing Pattern with Sekiban DCB and AI

1. Introduction In this article, we will build an event-sourced application using Sekiban DCB and AI. Along with implementing the UI and APIs, we will check whether the application maintains consistency when multiple operations happen at the same time. For this project, I used Codex × GPT-6 Astra. The Sekiban DCB Decider template includes sample...