Modular Next.js Architecture Guide

Sprawl starts with unclear module ownership

As product scope grows, unclear boundaries create duplicated logic, tangled dependencies, and fragile updates.

Modular strategy

Group by domain, separate data access from presentation, and standardize shared primitives.

Guardrails

Enforce import boundaries, shared contracts, and page-level performance budgets.

Outcome

The app scales in complexity without sacrificing developer productivity.