This document defines the implementation architecture for Hanoi Lens. It connects the product brief to a buildable system, records the main technical boundaries, and provides rules for adding features ...

When you open the project, you see “repositories,” “services,” and “web,” but not “catalog,” “orders,” or “inventory.” The domain is hidden behind technical folders, which makes it harder for ...

これは、「シンプレクス Advent Calendar 2025」 の5日目の記事です。 HelloControllerが作られて単にベタ書きのjsonを返すだけのAPI @RestControllerのアノテーションをつけるだけでいい感じに対応してくれたり、APIのマッピングもアノテーションで行ったりと、だいぶ ...

This repository showcases a Modular Monolith implementation of borrowing books in a library with Spring Boot, Spring Modulith and Domain Driven Design principles. The code is explained in a series of ...