Feature Based Clean Architecture. Part 1: How a NestJS Application Evolves Into an Unmaintainable State

An architectural doctrine for NestJS projects: a breakdown of typical codebase degradation scenarios and the structural constraints that keep them from emerging as the feature set grows. This article is a breakdown of how a typical NestJS backend degrades as the feature set grows, and how the ideas of Clean Architecture make it possible to avoid that. I'll walk through the full cycle: show on a "before and after" example how the feature-based structure that today is pushed as the standard loses