bend-core

bend-core

Core library for Bend - Production-ready backend scaffolder with enterprise-grade security and logging.

Features

• Production-Ready Security: helmet(), cors(), rate limiting, HPP protection
• Enterprise Logging: Winston with daily rotation and structured metadata
• 8 Template Combinations: TypeScript/JavaScript × Express/Fastify × Mongoose/Prisma
• Runtime Detection: Auto-detects Node.js or Bun
• Package Manager Detection: Auto-detects npm, pnpm, yarn, or bun
• TypeScript First: Strict mode by default
• Zero Config: Works out of the box

Installation

Direct Usage (Recommended)

npx bend-core

Install Globally

npm install -g bend-core
bend-core

Install as Dependency

npm install bend-core

Usage

CLI Mode

# Interactive mode
npx bend-core

# With project name
npx bend-core my-backend

# Skip dependency installation
npx bend-core my-backend --no-install

Programmatic API

import { createProject } from 'bend-core';

await createProject({
  projectName: 'my-backend',
  runtime: 'nodejs',        // or 'bun'
  language: 'ts',           // or 'js'
  framework: 'express',     // or 'fastify'
  orm: 'mongoose',          // or 'prisma'
  packageManager: 'npm',    // or 'pnpm', 'yarn', 'bun'
  skipInstall: false,
});

What You Get

Every generated project includes:

Security Middlewares

• helmet - Security HTTP headers
• cors - Cross-origin resource sharing
• rate-limit - DDoS protection (100 req/15min)
• hpp - HTTP parameter pollution prevention
• compression - Response compression
• body limits - Prevents memory exhaustion

Logging & Monitoring

• Winston - Enterprise-grade logging
• Daily rotation - Automatic log archival
• Structured metadata - JSON format
• HTTP logging - Morgan middleware integration
• Separate logs - error, combined, exceptions

Error Handling

• Async error handling - express-async-errors
• Centralized middleware - Single error handler
• Graceful shutdown - Proper cleanup
• Unhandled rejection handlers - No silent crashes

Templates

All 8 template combinations are included:

Language	Framework	ORM	Status
TypeScript	Express	Mongoose	✅
TypeScript	Express	Prisma	✅
TypeScript	Fastify	Mongoose	✅
TypeScript	Fastify	Prisma	✅
JavaScript	Express	Mongoose	✅
JavaScript	Express	Prisma	✅
JavaScript	Fastify	Mongoose	✅
JavaScript	Fastify	Prisma	✅

Project Structure

Generated projects have this structure:

my-backend/
├── src/
│   ├── config/
│   │   ├── database.ts      # DB connection
│   │   └── logger.ts        # Winston config
│   ├── controllers/         # Controllers
│   ├── models/              # DB models
│   ├── routes/              # API routes
│   ├── services/            # Business logic
│   ├── middlewares/         # Custom middleware
│   ├── utils/               # Utilities
│   ├── app.ts               # App setup
│   └── server.ts            # Entry point
├── logs/                    # Auto-generated logs
├── .env                     # Environment vars
├── .gitignore
├── package.json
├── tsconfig.json            # (TypeScript)
└── README.md

API Reference

createProject(options)

Creates a new backend project.

Parameters:

interface CLIOptions {
  projectName?: string;      // Project directory name
  runtime?: 'nodejs' | 'bun'; // Runtime (auto-detected)
  language?: 'ts' | 'js';    // Language
  framework?: 'express' | 'fastify'; // Framework
  orm?: 'mongoose' | 'prisma'; // ORM
  packageManager?: 'npm' | 'pnpm' | 'yarn' | 'bun'; // PM (auto-detected)
  skipInstall?: boolean;     // Skip npm install
  noInstall?: boolean;       // Alias for skipInstall
}

Returns: Promise<void>

Example:

import { createProject } from 'bend-core';

await createProject({
  projectName: 'my-api',
  language: 'ts',
  framework: 'fastify',
  orm: 'prisma',
});

Environment Variables

Generated projects support these environment variables:

# Server
PORT=3000
NODE_ENV=development

# Database (MongoDB)
MONGODB_URI=mongodb://localhost:27017/myapp

# Database (Prisma)
DATABASE_URL="postgresql://user:pass@localhost:5432/mydb"

# Security
CORS_ORIGIN=https://yourdomain.com

# Logging
LOG_LEVEL=info  # error | warn | info | debug

Dependencies

Core Dependencies:

• @clack/prompts - Interactive CLI prompts
• commander - CLI framework
• ejs - Template engine
• picocolors - Terminal colors

Template Dependencies (included in generated projects):

• express | fastify - Web framework
• mongoose | prisma - ORM
• helmet - Security headers
• cors - CORS handling
• express-rate-limit - Rate limiting
• hpp - Parameter pollution prevention
• winston - Logging
• winston-daily-rotate-file - Log rotation
• morgan - HTTP logging
• compression - Response compression
• dotenv - Environment variables

Development

This is part of the Bend monorepo. See the main README for development instructions.

Building

pnpm build

Testing Locally

node dist/cli/index.js my-test-project

Links

• Main Project: https://github.com/bendhq/bend
• npm Package: https://www.npmjs.com/package/bend-core
• Documentation: https://bendhq.org/docs
• Issues: https://github.com/bendhq/bend/issues

License

MIT © Bend

Part of Bend - Production-ready backends in seconds.