Turborepo Skill

Turborepo is a high-performance build system optimized for JavaScript and TypeScript monorepos, written in Rust. It provides intelligent caching, task orchestration, and remote execution capabilities to dramatically speed up development workflows.

Reference

https://turborepo.com/llms.txt

When to Use This Skill

Use this skill when:

•Setting up a new monorepo with multiple packages
•Optimizing build performance in existing monorepos
•Implementing task pipelines across packages
•Configuring intelligent caching strategies
•Setting up remote caching for teams
•Orchestrating tasks with dependency awareness
•Integrating monorepo with CI/CD pipelines
•Migrating from Lerna, Nx, or other monorepo tools
•Building microfrontends or shared libraries
•Managing workspace dependencies

Core Concepts

1. Monorepo Architecture

Turborepo organizes code into packages within a single repository:

•Root Package: Contains workspace configuration
•Internal Packages: Shared libraries, utilities, configs
•Applications: Frontend apps, backend services, etc.
•Workspaces: npm/yarn/pnpm workspace configuration

2. Task Pipeline

Tasks are organized in a dependency graph:

•Task Dependencies: Define execution order (build before test)
•Package Dependencies: Respect internal package relationships
•Parallel Execution: Run independent tasks simultaneously
•Topological Ordering: Execute tasks in correct dependency order

3. Intelligent Caching

Turborepo caches task outputs based on inputs:

•Local Cache: Stores outputs on local machine
•Remote Cache: Shares cache across team/CI (Vercel or custom)
•Content-Based Hashing: Only re-run when inputs change
•Cache Restoration: Instant task completion from cache

4. Task Outputs

Define what gets cached:

•Build artifacts (dist/, build/)
•Test results
•Generated files
•Type definitions

Installation

Prerequisites

bash

# Requires Node.js 18+ and a package manager
node --version  # v18.0.0+

Global Installation

bash

# npm
npm install turbo --global

# yarn
yarn global add turbo

# pnpm
pnpm add turbo --global

# bun
bun add turbo --global

Per-Project Installation

bash

# npm
npm install turbo --save-dev

# yarn
yarn add turbo --dev

# pnpm
pnpm add turbo --save-dev

# bun
bun add turbo --dev

Project Setup

Create New Monorepo

Using official examples:

bash

npx create-turbo@latest

Interactive prompts will ask:

•Project name
•Package manager (npm/yarn/pnpm/bun)
•Example template selection

Manual Setup

1. Initialize workspace:

json

// package.json (root)
{
  "name": "my-turborepo",
  "private": true,
  "workspaces": ["apps/*", "packages/*"],
  "scripts": {
    "build": "turbo run build",
    "dev": "turbo run dev",
    "test": "turbo run test",
    "lint": "turbo run lint"
  },
  "devDependencies": {
    "turbo": "latest"
  }
}

2. Create directory structure:

code

my-turborepo/
├── apps/
│   ├── web/              # Next.js app
│   └── docs/             # Documentation site
├── packages/
│   ├── ui/               # Shared UI components
│   ├── config/           # Shared configs (ESLint, TS)
│   └── tsconfig/         # Shared TypeScript configs
├── turbo.json            # Turborepo configuration
└── package.json          # Root package.json

3. Create turbo.json:

json

{
  "$schema": "https://turbo.build/schema.json",
  "globalDependencies": ["**/.env.*local"],
  "pipeline": {
    "build": {
      "dependsOn": ["^build"],
      "outputs": [".next/**", "!.next/cache/**", "dist/**"]
    },
    "dev": {
      "cache": false,
      "persistent": true
    },
    "lint": {},
    "test": {
      "dependsOn": ["build"]
    }
  }
}

Configuration (turbo.json)

Basic Structure

json

{
  "$schema": "https://turbo.build/schema.json",
  "globalDependencies": [".env", "tsconfig.json"],
  "globalEnv": ["NODE_ENV"],
  "pipeline": {
    // Task definitions
  }
}

Pipeline Configuration

Task with dependencies:

json

{
  "pipeline": {
    "build": {
      "dependsOn": ["^build"],
      "outputs": ["dist/**", ".next/**"],
      "env": ["NODE_ENV", "API_URL"]
    }
  }
}

Key properties:

•
dependsOn: Tasks to run first
- •["^build"]: Run dependencies' build first
- •["build"]: Run own build first
- •["^build", "lint"]: Run deps' build and own lint
•outputs: Files/directories to cache
•inputs: Override input detection (default: all tracked files)
•cache: Enable/disable caching (default: true)
•env: Environment variables that affect output
•persistent: Keep task running (for dev servers)
•outputMode: Control output display

Task Dependency Patterns

Topological (^):

json

{
  "build": {
    "dependsOn": ["^build"]  // Run dependencies' build first
  }
}

Regular:

json

{
  "deploy": {
    "dependsOn": ["build", "test"]  // Run own build and test first
  }
}

Combined:

json

{
  "test": {
    "dependsOn": ["^build", "lint"]  // Deps' build, then own lint
  }
}

Output Modes

json

{
  "pipeline": {
    "build": {
      "outputMode": "full"        // Show all output
    },
    "dev": {
      "outputMode": "hash-only"   // Show cache hash only
    },
    "test": {
      "outputMode": "new-only"    // Show new output only
    },
    "lint": {
      "outputMode": "errors-only" // Show errors only
    }
  }
}

Environment Variables

Global environment variables:

json

{
  "globalEnv": ["NODE_ENV", "CI"],
  "globalDependencies": [".env", ".env.local"]
}

Per-task environment variables:

json

{
  "pipeline": {
    "build": {
      "env": ["NEXT_PUBLIC_API_URL", "DATABASE_URL"],
      "passThroughEnv": ["CUSTOM_VAR"]  // Pass without hashing
    }
  }
}

Commands

turbo run

Run tasks across packages:

bash

# Run build in all packages
turbo run build

# Run multiple tasks
turbo run build test lint

# Run in specific packages
turbo run build --filter=web
turbo run build --filter=@myorg/ui

# Run in packages matching pattern
turbo run build --filter='./apps/*'

# Force execution (skip cache)
turbo run build --force

# Run from specific directory
turbo run build --filter='[./apps/web]'

# Run with dependencies
turbo run build --filter='...^web'

# Parallel execution control
turbo run build --concurrency=3
turbo run build --concurrency=50%

# Continue on error
turbo run test --continue

# Dry run
turbo run build --dry-run

# Output control
turbo run build --output-logs=new-only
turbo run build --output-logs=hash-only
turbo run build --output-logs=errors-only
turbo run build --output-logs=full

turbo prune

Create a subset of the monorepo:

bash

# Prune for specific app
turbo prune --scope=web

# Prune with Docker
turbo prune --scope=api --docker

# Output to custom directory
turbo prune --scope=web --out-dir=./deploy

Use cases:

•Docker builds (only include necessary packages)
•Deploy specific apps
•Reduce CI/CD context size

turbo gen

Generate code in your monorepo:

bash

# Generate new package
turbo gen workspace

# Generate from custom generator
turbo gen my-generator

# List available generators
turbo gen --list

turbo link

Link local repo to remote cache:

bash

# Link to Vercel
turbo link

# Unlink
turbo unlink

turbo login

Authenticate with Vercel:

bash

turbo login

turbo ls

List packages in monorepo:

bash

# List all packages
turbo ls

# JSON output
turbo ls --json

Filtering

Filter by Package Name

bash

# Single package
turbo run build --filter=web

# Multiple packages
turbo run build --filter=web --filter=api

# Scoped package
turbo run build --filter=@myorg/ui

Filter by Pattern

bash

# All apps
turbo run build --filter='./apps/*'

# Pattern matching
turbo run build --filter='*-ui'

Filter by Directory

bash

# From specific directory
turbo run build --filter='[./apps/web]'

Filter by Git

bash

# Changed since main
turbo run build --filter='[main]'

# Changed since HEAD~1
turbo run build --filter='[HEAD~1]'

# Changed in working directory
turbo run test --filter='...[HEAD]'

Filter by Dependencies

bash

# Package and its dependencies
turbo run build --filter='...web'

# Package's dependencies only
turbo run build --filter='...^web'

# Package and its dependents
turbo run test --filter='ui...'

# Package's dependents only
turbo run test --filter='^ui...'

Caching Strategies

Local Caching

Enabled by default, stores in ./node_modules/.cache/turbo

Cache behavior:

json

{
  "pipeline": {
    "build": {
      "outputs": ["dist/**"],  // Cache dist directory
      "cache": true            // Enable caching (default)
    },
    "dev": {
      "cache": false           // Disable for dev servers
    }
  }
}

Clear cache:

bash

# Clear Turbo cache
rm -rf ./node_modules/.cache/turbo

# Or use turbo command
turbo run build --force  # Skip cache for this run

Remote Caching

Share cache across team and CI:

1. Link to Vercel (recommended):

bash

turbo login
turbo link

2. Custom remote cache:

json

// .turbo/config.json
{
  "teamid": "team_123",
  "apiurl": "https://cache.example.com",
  "token": "your-token"
}

Benefits:

•Share builds across team
•Speed up CI/CD
•Consistent builds
•Reduce compute costs

Cache Signatures

Cache is invalidated when:

•Source files change
•Dependencies change
•Environment variables change (if specified)
•Global dependencies change
•Task configuration changes

Control inputs:

json

{
  "pipeline": {
    "build": {
      "inputs": ["src/**/*.ts", "!src/**/*.test.ts"],
      "env": ["NODE_ENV"]
    }
  }
}

Workspace Patterns

Package Types

1. Internal packages (packages/*):

json

// packages/ui/package.json
{
  "name": "@myorg/ui",
  "version": "0.0.0",
  "main": "./dist/index.js",
  "types": "./dist/index.d.ts",
  "scripts": {
    "build": "tsc",
    "dev": "tsc --watch",
    "lint": "eslint ."
  }
}

2. Applications (apps/*):

json

// apps/web/package.json
{
  "name": "web",
  "version": "1.0.0",
  "private": true,
  "dependencies": {
    "@myorg/ui": "*",
    "next": "latest"
  },
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start"
  }
}

Dependency Management

Workspace protocol (pnpm/yarn):

json

{
  "dependencies": {
    "@myorg/ui": "workspace:*"
  }
}

Version protocol (npm):

json

{
  "dependencies": {
    "@myorg/ui": "*"
  }
}

Shared Configuration

ESLint config package:

// packages/eslint-config/index.js
module.exports = {
  extends: ["next", "prettier"],
  rules: {
    // shared rules
  }
}

TypeScript config package:

json

// packages/tsconfig/base.json
{
  "compilerOptions": {
    "strict": true,
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
  }
}

Usage:

json

// apps/web/tsconfig.json
{
  "extends": "@myorg/tsconfig/base.json",
  "compilerOptions": {
    "jsx": "preserve"
  }
}

CI/CD Integration

GitHub Actions

yaml

name: CI

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v4

      - uses: actions/setup-node@v4
        with:
          node-version: 18

      - name: Install dependencies
        run: npm install

      - name: Build
        run: npx turbo run build
        env:
          TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}
          TURBO_TEAM: ${{ secrets.TURBO_TEAM }}

      - name: Test
        run: npx turbo run test

GitLab CI

yaml

image: node:18

cache:
  key: ${CI_COMMIT_REF_SLUG}
  paths:
    - node_modules/
    - .turbo/

build:
  stage: build
  script:
    - npm install
    - npx turbo run build
  variables:
    TURBO_TOKEN: $TURBO_TOKEN
    TURBO_TEAM: $TURBO_TEAM

Docker

dockerfile

FROM node:18-alpine AS base

# Prune workspace
FROM base AS builder
RUN npm install -g turbo
COPY . .
RUN turbo prune --scope=web --docker

# Install dependencies
FROM base AS installer
COPY --from=builder /app/out/json/ .
COPY --from=builder /app/out/package-lock.json ./package-lock.json
RUN npm install

# Build
COPY --from=builder /app/out/full/ .
RUN npx turbo run build --filter=web

# Runner
FROM base AS runner
COPY --from=installer /app/apps/web/.next/standalone ./
COPY --from=installer /app/apps/web/.next/static ./apps/web/.next/static
COPY --from=installer /app/apps/web/public ./apps/web/public

CMD node apps/web/server.js

Optimization Tips

•Use remote caching in CI:

yaml

env:
  TURBO_TOKEN: ${{ secrets.TURBO_TOKEN }}
  TURBO_TEAM: ${{ secrets.TURBO_TEAM }}

•Cache node_modules:

yaml

- uses: actions/cache@v3
  with:
    path: node_modules
    key: ${{ runner.os }}-node-${{ hashFiles('**/package-lock.json') }}

•Run only affected tasks:

bash

turbo run build test --filter='...[origin/main]'

Framework Integration

Next.js

json

// apps/web/package.json
{
  "name": "web",
  "scripts": {
    "dev": "next dev",
    "build": "next build",
    "start": "next start"
  },
  "dependencies": {
    "next": "latest",
    "react": "latest"
  }
}

turbo.json:

json

{
  "pipeline": {
    "build": {
      "outputs": [".next/**", "!.next/cache/**"]
    },
    "dev": {
      "cache": false,
      "persistent": true
    }
  }
}

Vite

json

{
  "pipeline": {
    "build": {
      "dependsOn": ["^build"],
      "outputs": ["dist/**"]
    },
    "dev": {
      "cache": false,
      "persistent": true
    }
  }
}

NuxtJS

json

{
  "pipeline": {
    "build": {
      "outputs": [".output/**", ".nuxt/**"]
    },
    "dev": {
      "cache": false,
      "persistent": true
    }
  }
}

Development Tools Integration

TypeScript

json

{
  "pipeline": {
    "build": {
      "dependsOn": ["^build"],
      "outputs": ["dist/**", "*.tsbuildinfo"]
    },
    "typecheck": {
      "dependsOn": ["^build"]
    }
  }
}

ESLint

json

{
  "pipeline": {
    "lint": {
      "dependsOn": ["^build"],
      "outputs": []
    }
  }
}

Jest / Vitest

json

{
  "pipeline": {
    "test": {
      "dependsOn": ["build"],
      "outputs": ["coverage/**"],
      "cache": true
    }
  }
}

Prisma

json

{
  "pipeline": {
    "db:generate": {
      "cache": false
    },
    "db:push": {
      "cache": false
    }
  }
}

Best Practices

1. Structure Your Monorepo

code

my-monorepo/
├── apps/                    # Applications
│   ├── web/                # Frontend app
│   ├── api/                # Backend API
│   └── docs/               # Documentation
├── packages/               # Shared packages
│   ├── ui/                 # UI components
│   ├── config/             # Shared configs
│   ├── utils/              # Utilities
│   └── tsconfig/           # TS configs
├── tooling/                # Development tools
│   ├── eslint-config/
│   └── prettier-config/
└── turbo.json

2. Define Clear Task Dependencies

json

{
  "pipeline": {
    "build": {
      "dependsOn": ["^build"]
    },
    "test": {
      "dependsOn": ["build"]
    },
    "lint": {
      "dependsOn": ["^build"]
    },
    "deploy": {
      "dependsOn": ["build", "test", "lint"]
    }
  }
}

3. Optimize Cache Configuration

•Cache build outputs, not source files
•Include all generated files in outputs
•Exclude cache directories (e.g., .next/cache)
•Disable cache for dev servers

json

{
  "pipeline": {
    "build": {
      "outputs": [
        "dist/**",
        ".next/**",
        "!.next/cache/**",
        "storybook-static/**"
      ]
    },
    "dev": {
      "cache": false,
      "persistent": true
    }
  }
}

4. Use Environment Variables Wisely

json

{
  "globalEnv": ["NODE_ENV", "CI"],
  "pipeline": {
    "build": {
      "env": ["NEXT_PUBLIC_API_URL"],
      "passThroughEnv": ["DEBUG"]  // Don't affect cache
    }
  }
}

5. Leverage Remote Caching

•Enable for all team members
•Configure in CI/CD
•Reduces build times significantly
•Especially beneficial for large teams

6. Use Filters Effectively

bash

# Build only changed packages
turbo run build --filter='...[origin/main]'

# Build specific app with dependencies
turbo run build --filter='...web'

# Test only affected packages
turbo run test --filter='...[HEAD^1]'

7. Organize Scripts Consistently

Root package.json:

json

{
  "scripts": {
    "build": "turbo run build",
    "dev": "turbo run dev",
    "lint": "turbo run lint",
    "test": "turbo run test",
    "clean": "turbo run clean && rm -rf node_modules"
  }
}

8. Handle Persistent Tasks

json

{
  "pipeline": {
    "dev": {
      "cache": false,
      "persistent": true  // Keeps running
    }
  }
}

Common Patterns

Full-Stack Application

code

apps/
├── web/          # Next.js frontend
│   └── package.json
├── api/          # Express backend
│   └── package.json
└── mobile/       # React Native
    └── package.json

packages/
├── ui/           # Shared UI components
├── database/     # Database client/migrations
├── types/        # Shared TypeScript types
└── config/       # Shared configs

Shared Component Library

code

packages/
├── ui/                    # Component library
│   ├── src/
│   ├── package.json
│   └── tsconfig.json
└── ui-docs/              # Storybook
    ├── .storybook/
    ├── stories/
    └── package.json

Microfrontends

code

apps/
├── shell/        # Container app
├── dashboard/    # Dashboard MFE
└── settings/     # Settings MFE

packages/
├── shared-ui/    # Shared components
└── router/       # Routing logic

Troubleshooting

Cache Issues

Problem: Task not using cache when it should

bash

# Check what's causing cache miss
turbo run build --dry-run=json

# Force rebuild
turbo run build --force

# Clear cache
rm -rf ./node_modules/.cache/turbo

Problem: Cache too large

bash

# Limit cache size in turbo.json
{
  "cacheDir": ".turbo",
  "cacheSize": "50gb"
}

Dependency Issues

Problem: Internal package not found

bash

# Ensure workspace is set up correctly
npm install

# Check package names match
npm ls @myorg/ui

# Rebuild dependencies
turbo run build --filter='...web'

Task Execution Issues

Problem: Tasks running in wrong order

•Check dependsOn configuration
•Use ^task for dependency tasks
•Verify task names match package.json scripts

Problem: Dev server not starting

json

{
  "pipeline": {
    "dev": {
      "cache": false,
      "persistent": true  // Add this
    }
  }
}

Performance Issues

Problem: Builds taking too long

bash

# Run with concurrency limit
turbo run build --concurrency=2

# Use filters to build less
turbo run build --filter='...[origin/main]'

# Check for unnecessary dependencies
turbo run build --dry-run

Problem: Remote cache not working

bash

# Verify authentication
turbo link

# Check environment variables
echo $TURBO_TOKEN
echo $TURBO_TEAM

# Test connection
turbo run build --output-logs=hash-only

Migration Guide

From Lerna

•Replace Lerna with Turborepo:

bash

npm uninstall lerna
npm install turbo --save-dev

•Convert lerna.json to turbo.json:

json

{
  "pipeline": {
    "build": {
      "dependsOn": ["^build"]
    }
  }
}

•Update scripts:

json

{
  "scripts": {
    "build": "turbo run build",
    "test": "turbo run test"
  }
}

From Nx

•Install Turborepo:

bash

npm install turbo --save-dev

•Convert nx.json to turbo.json:

•Map targetDefaults to pipeline
•Convert dependsOn syntax
•Configure caching

•Update workspace configuration
•Migrate CI/CD scripts

Resources

•Documentation: https://turbo.build/repo/docs
•Examples: https://github.com/vercel/turbo/tree/main/examples
•Discord: https://turbo.build/discord
•GitHub: https://github.com/vercel/turbo

Implementation Checklist

When setting up Turborepo: