A RESTful To-Do list API built with TypeScript, following Clean Architecture principles with an in-memory database. Uses only Node.js built-in modules (no runtime dependencies).

src/
├── entities/        Pure domain model (Todo)
├── interfaces/      Repository contract
├── usecases/        Business logic (CRUD)
├── infrastructure/  In-memory repository
└── adapters/        HTTP handlers

Each layer has a single responsibility:

{
  "id": 1,
  "title": "Buy groceries",
  "completed": false,
  "created_at": "2026-03-12T11:00:00Z"
}

• Node.js 18+

npm install
npm run dev

Server runs on http://localhost:8080.

# Unit and functional tests
npm test