Domain-First Nx Monorepos: Using `packages/` to Make Ownership and Boundaries Obvious

Where should this go? Which apps are using this library? Those two questions are plaguing my team as our monorepo grows. Not because we don’t know Nx, TypeScript, or React—but because our folder structure doesn’t clearly communicate  ownership . We started with a pretty standard setup: apps/<app> libs/<domain>/<lib> libs/shared/<lib> That structure was a great starting point (this was our first real dive into monorepo architecture). It was simple, it scaled  enough , and it let us move fast early on. But we’re now at ~40 libraries and growing, and it’s becoming less obvious: where a new library should live, and whether a library is truly domain-specific or actually shared. This post explains why we plan to migrate to a  domain-first  packages/  layout . The main goal being  domain clarity  (and making module boundaries easier to enforce  consistently ). Flat  libs/  worked… until it didn’t The hardest part of a growing monorepo isn’t the tooling—it’s the ambiguity. When everything live