Architecture Pattern

📦 Monorepo at Scale

Turborepo for task orchestration with 96% faster task graph computation. Remote caching eliminates redundant builds. 1,000-package repos go from 8.1s to 716ms Time to First Task.

Why Monorepo?

🔗 Shared Components

UI components, utilities, types, and configs shared across multiple apps. Change once, update everywhere.

⚛️ Atomic Changes

Update a shared package and all consuming apps in one PR. No version pinning, no publish cycles.

🔄 Unified CI/CD

One repository, one build pipeline. Vercel detects which app changed and only rebuilds that one.

👥 Team Scalability

Multiple teams work in the same repo with clear boundaries. Packages define ownership and APIs.

Turborepo Key Features

Remote Caching

0ms for cached tasks

Build outputs cached in the cloud. If any team member (or CI) already built a package with the same inputs, the output is reused. Zero redundant work.

Task Graph Optimization

8.1s → 716ms

Turborepo analyzes package dependencies and runs tasks in the optimal parallel order. 96% faster task graph computation in latest version.

Incremental Builds

80% fewer rebuilds

Only rebuild packages that changed. A change to packages/ui only rebuilds apps/web and apps/docs (which depend on it), not apps/api.

Vercel Integration

Zero config

Vercel detects Turborepo automatically. Root-level turbo.json defines build pipeline. Deploy only the app that changed.

Typical Monorepo Structure

my-monorepo/
├── apps/
│   ├── web/          # Next.js marketing site (deploys to vercel)
│   ├── dashboard/    # Next.js SaaS dashboard (deploys to vercel)
│   └── docs/         # Next.js documentation (deploys to vercel)
├── packages/
│   ├── ui/           # Shared React component library
│   ├── utils/        # Shared utility functions
│   ├── config/       # Shared ESLint, TypeScript configs
│   └── database/     # Shared Prisma schema and client
├── turbo.json        # Task pipeline configuration
├── package.json      # Root workspace config
└── pnpm-workspace.yaml

turbo.json Configuration

{
  "$schema": "https://turbo.build/schema.json",
  "globalDependencies": ["**/.env.*local"],
  "pipeline": {
    "build": {
      "dependsOn": ["^build"],     // Build dependencies first
      "outputs": [".next/**", "!.next/cache/**"]
    },
    "lint": {},
    "test": {
      "dependsOn": ["build"]       // Test after build
    },
    "dev": {
      "cache": false,               // Never cache dev server
      "persistent": true
    }
  }
}

Performance Stats

96%

Faster task graph computation

Latest Turborepo version

716ms

Time to first task (1K packages)

Down from 8.1s

0ms

Cached task execution

Remote cache hit → instant

80%+

Fewer CI minutes

Only changed packages rebuild

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