Enterprise Project Architecture
A handbook for designing and operating an enterprise Next.js and Turborepo project.
Enterprise projects fail when architecture, delivery, ownership, and operations are treated as separate concerns. A scalable project needs clear boundaries from the first repository decision to the incident review.
This handbook describes a practical operating model for a Next.js and Turborepo-based enterprise project. It focuses on monorepo design, shared packages, deployment, testing, agentic development, security, and monitoring.
Core View
Architecture is an operating agreement. The code layout matters because it defines ownership, review paths, deployment risk, and how fast teams can safely change the system.
Enterprise Delivery System
Maturity Model
| Level | State | Common symptom | Promotion condition |
|---|---|---|---|
| L1 Project | One app can ship | Shared logic is copied | Workspace boundaries are defined |
| L2 Platform | Multiple apps share packages | Builds and tests are slow | Pipeline and cache rules are stable |
| L3 Governed | Teams own clear areas | Review and release risk is inconsistent | CI, security, and ownership gates operate |
| L4 Observable | Delivery and runtime are measured | Incidents rely on individual memory | Monitoring, runbooks, and postmortems exist |
| L5 Adaptive | Agents and automation improve delivery | Context is reusable and safe | Skills, context packs, and governance mature |
Contents
Ch1. Monorepo Architecture
Define app, package, tooling, and ownership boundaries.
Ch2. Workspace Design
Create a repository layout that scales with teams and products.
Ch3. Shared Packages
Govern reusable UI, API contracts, config, and utility packages.