Yapper is a highly opinionated CLI tool that lets you generate structured APIs, modules, and production-ready Express + Mongoose setups instantly.

It handles all the boilerplate of setting up an production grade Express.js application and allows you to easily generate new API modules (controllers, services, routes, and schemas) with a single command.

Usage

1. Create a New Project

To generate a new, fully configured Express + Mongoose project, use the yapper command:

yapper <project-name>

This will create a new folder named <project-name> containing:

• A structured Express app with best practices

• Centralized error handling and standardized API responses

• Pre-configured logger and dotenv

• A MongoDB connection setup using Mongoose

• Typescript support and standard configurations (tsconfig.json, package.json, etc.)

Once generated, navigate into your new project, check dependencies, and start the dev server:

cd <project-name> npm run dev

2. Generate a New Module

To add a new API module to your project, use the yapp command from within your project's root directory:

yapp <module-name>

For example, running yapp user will automatically generate the following files:

• src/schemas/user.schema.ts

• src/services/user.service.ts

• src/controllers/user.controller.ts

• src/routes/user.route.ts

These files come pre-filled with standard CRUD boilerplate, completely hooked up and ready to be imported into your main application.