How fn(args, deps) supports DDD and aggregate roots in TypeScript

Domain-Driven Design can arrive wrapped in a lot of vocabulary: ubiquitous language, aggregates, repositories, domain services, anemic models, bounded contexts, and more.

But the core idea is simpler than the terminology makes it sound. DDD is about putting domain behavior and domain boundaries at the center of the code, instead of letting infrastructure and framework concerns drive the design.

fn(args, deps) does not replace DDD. It is a practical function shape that can make several DDD ideas easier to express in TypeScript: explicit use cases, explicit dependencies, and clearer boundaries around where domain rules live.