JSPM

Info about your dev environment for debugging purposes

A development middleware for webpack

Do things in development and nothing otherwise

Simple monitor script for use during development of a Node.js app.

Angular Material Component Development Kit

A local Prisma Postgres server for development and testing

Handles the lifecyle and bootstrapping of generators in a specific environment

Rails-inspired generator system that provides scaffolding for your apps

Loads environment variables from `.env.[development|test|production][.local]` files

Simple development http server with live reload capability

Parse a function into an object using espree, acorn or babylon parsers. Extensible through Smart Plugins

Shared utilities for JSX location data injection

CLI tool for running Yeoman generators

UI5 CLI - File System Abstraction

A Vite plugin that adds location data attributes to JSX elements

Automatically install pre-commit hooks for your npm modules.

tldraw infinite canvas SDK (private utilities).

UI5 CLI - Internal Logger

UI5 CLI - Server

TypeScript 類型工具庫：提供豐富的類型操作工具和重新導出的內建類型 / TypeScript type utility library: provides rich type manipulation utilities and re-exported built-in types

cli for mastra

Check if Electron is running in development

UI5 CLI - CLI

tldraw infinite canvas SDK (schema).

tldraw infinite canvas SDK (state).

A runtime validation library by tldraw.

UI5 CLI - Project

For managing certificates when developing Office Add-ins.

Unified AI rules management CLI tool that generates configuration files for various AI development tools

tldraw infinite canvas SDK (editor).

UI5 CLI - Builder

tldraw infinite canvas SDK (store).

A lean, modular web server for rapid full-stack development

A tiny little drawing editor.

SMTP Server and Web Interface for reading and testing emails during development

tldraw infinite canvas SDK (react bindings for state).

simple development http server with live reload capability

Ensures consistent encoding and decoding of TC Signals for the iab. Transparency and Consent Framework (TCF).

Replace port numbers with stable, named .localhost URLs. For humans and agents.

A command line utility to read version from package.json and attach it into your module as a property

tldraw infinite canvas SDK (multiplayer sync).

Holder uses SVG to render image placeholders entirely in browser.

tldraw infinite canvas SDK (multiplayer sync react bindings).

A modern, fast .d.ts generation tool, powered by Bun.

A Vite plugin for development enhancements

All the development dependencies you need.

A tiny little drawing editor.

AI-native system for spec-driven development

Assemble plugin for rendering views in a vinyl pipeline.

Assemble pipeline plugin for pushing views into a vinyl stream.

Adds useful debug features to your Electron app

This package permit to have a centralized dotenv on a monorepo. It also includes some extra features such as manipulation and saving of changes to the dotenv file, a default centralized file, and a file loader with ordering and priorities.

Mocks Server plugin providing an administration REST API

Beautiful text formatter for LogTape—perfect for local development

The core assemble application with no presets or defaults. All configuration is left to the implementor.

Assemble plugin (^0.6.0) for loading globs of views onto custom view collections. Also works with verb or other Templates.js based applications.

A stream implementation of the bunyan cli tool's pretty printing capabilities

A static code analysis tool for UI5

Automatically install pre-commit hooks for your npm modules.

Light wrapper for vinyl-fs to add streams support in a way that plays nice with Assemble middleware.

Assemble pipeline plugin for handling custom middleware stages.

Lightweight development node server for serving a web app, providing a fallback for browser history API, loading in the browser, and injecting scripts on the fly.

Middleware for validating host headers in requests to protect against DNS rebinding attacks.

Reloads all style sheets in the page associated with a URL

Serve ES modules over HTTP, rewriting imports

Automatically install pre-push hooks for your npm modules.

Get the absolute URL of your Next.js app (and optionally set a dev url)

Mock Server supporting multiple route variants and mocks

Mocks Server plugin providing proxy variant handler

Pluggable mock server supporting multiple route variants and mocks

Mock Service Worker (MSW) handlers generator plugin for Kubb, creating API mocks from OpenAPI specifications for frontend development and testing.

a browserify server for rapid prototyping

Mocks server plugin providing an interactive CLI

tldraw infinite canvas SDK (assets).

A modern [Web Component](https://developer.mozilla.org/en-US/docs/Web/Web_Components) for [Luzmo](https://luzmo.com) dashboards in your web application.

Run DynamoDB local for development and testing

Faker.js data generator plugin for Kubb, creating realistic mock data from OpenAPI specifications for development and testing.

watch and reload your electron app the easy way

A task management system for ambitious AI-driven development that doesn't overwhelm and confuse Cursor.

Regular expression for matching HTML empty conditional comments

Ensures consistent encoding and decoding of TC Signals for the iab. Transparency and Consent Framework (TCF).

webhint's recommended hints configuration for development

Breakthrough Method of Agile AI-driven Development

UI5 CLI middleware to instrument code coverage with Istanbul

Useful utilities for Electron apps and modules

A Vite plugin that adds source location and component information to DOM elements during development

Storybook Addon Development Kit

Dynamodb local plugin for devops

Static file serving for Electron apps

MCP server for SAPUI5/OpenUI5 development

Base library for creating Angular components and applications using Taiga UI principles regarding of actual visual appearance

AI development tool with CLI and dashboard

Node.js module to refresh and reload your code in your browser when your code changes. No browser plugins required.

AI development tools for debugging and monitoring AI SDKs streams

Ensures other in-page digital marketing technologies have access to CMP transparency and consent information for the iab. Transparency and Consent Framework (TCF).

Quickly get self signed ssl certificates for development

An Angular library providing a set of services for supporting server-side rendering (SSR) and other features.

A framework-agnostic developer toolbar for interacting with LaunchDarkly during development

tldraw infinite canvas SDK (ai module).

This is a React library for embedding [Luzmo](https://luzmo.com) dashboards in your React application.

A Development Server in a Webpack Plugin

A package with tools for Taiga UI library i18n

A minimal CLI helper to run a local development server with CORS enabled

🐏 A webpack plugin for blazing fast builds on a RAM disk / drive

Storybook-like preview tool for Slack Block Kit development

A Typescript type definition for NPM package json

Simple auto-reloading for Electron apps during development

A CLI for webpack-plugin-serve, providing a premier webpack development server

Vite Plugin for API mock dev server.

A CLI for remix-run

The Inspection Chamber is an in-browser development tool that gives you all the knobs and dials to interactively put your view transitions through their paces.

Utilities for debugging Piral instances.

A gulp plugin to remove parts of code based on regular expressions.

A Vite plugin for synchronizing HMR across multiple workspaces in a monorepo setup.

Run VS Code on a remote server.

A development middleware for Rspack

A TLS/HTTPS library with automation.

A webpack plugin that allows you to securely use environment variables within your javascript web application, loading them using dotenv-flow's `.env*` files loading strategy.

Enhanced Sanity.io plugin development experience

a development server for rollup

A tool to manage project Git hooks

Init CLI for Prisma

This is a Vue.js library for embedding [Luzmo](https://luzmo.com) dashboards in your Vue 2 or Vue 3 application.

CMP API Stub code

simple development http server with live reload capability

Self-signed PEM key and certificate ready for use in your HTTPS server (fork from https-pem)

tldraw infinite canvas SDK (create cli).

Dev CLI for Prisma

A toolkit for React, Preact & Inferno apps, React libraries and other npm modules for the web, with no configuration (until you need it)

Create a new PrizmKit-powered project with clean initialization — no framework dev files, just what you need.

React development tools for assistant-ui components

An implementation of the Node.js module resolution algorithm.

Bridge the gap between ES modules and CommonJS modules with an easy-to-use alternative to `tsc`.

AI-powered development workflow orchestrator

A gulp plugin for identifying biuld mode.

Generate plugin that gathers data from the user's environment to pre-populate data for hints.

Fake SMTP Server for email testing

Hook for advanced logging of API requests to a Sails.js server.

Webcomponent pd-spa-helper following open-wc recommendations

Validates given IPs (IPv4 and IPv6) using [micromatch][] - glob patterns, RegExp, string or array of globs. If match returns the IP, otherwise null.

Professional AI coding team in your terminal. Multi-expert orchestration with planning, execution, and review — ensuring quality code through governance, not just generation.

**⚡️ Fast, lightweight and powerful development server for esbuild ⚡️**

AI-powered development tools with browser monitoring and skill integration

Extensible parser for git commit messages following Conventional Commits Specification

Free & open source ngrok alternative - Tunnel HTTP/HTTPS connections via Cloudflare Edge with custom subdomains

Ensures other in-page digital marketing technologies have access to CMP transparency and consent information for the iab. Transparency and Consent Framework (TCF).

AI development tools for debugging and monitoring AI SDKs streams

tls.createServer options with SSL/TSL certificate for quick https setup for live-server

Stuntman - HTTP proxy / mock API client

A tool to manage project Git hooks

Development Server with Live Reload Capability. (Maintained Fork of Live Server)

A modern and smart reverse proxy.

Use this generator to add some common default settings to your 'generate', verb, and assemble generators.

Core utilities for Localflare - config parsing and binding discovery

The one that maintains the development yard

Web-hacking proxy API for node

Self-signed PEM key and certificate ready for use in your HTTPS server

🍛 Ultralight http server with live reload. [CLI + API]

Stuntman - HTTP proxy / mock shared types and utils

A Vite plugin that forwards browser console logs to the Vite dev server console

Local development dashboard for Cloudflare Workers

⚡ 0xRay: Self-Healing AI Governance OS - Enterprise AI orchestration for OpenCode and Hermes

Typescript development tools

AI-powered coding toolbar for any web application. Select elements, capture context, and let AI modify your codebase in real-time.

Return `dev`, `prod`, or optional extra environements based on `process.env.NODE_ENV`

Safe git worktree management CLI with environment file syncing

CLI for managing decocms.com apps & projects

This is an Angular library for embedding [Luzmo](https://luzmo.com) dashboards in your Angular application.

Simple and Efficient Cache Implementation for TypeScript

Command line tool and developer framework for scaffolding out new GitHub projects. Generate offers the robustness and configurability of Yeoman, the expressiveness and simplicity of Slush, and more powerful flow control and composability than either.

Stuntman - HTTP proxy / mock server with API

Get all possible javascript (npm/yarn/pnpm) global or local, binaries or packages paths, e.g. node_modules and node_modules/.bin. Also works for those using NVM or such

React render tracker – a tool to discover performance issues related to unintended re-renders

Alive fork of live-server: simple development http server with live reload capability

Local SAML 2.0 IdP emulator for development testing

A transform that swaps out modules according to a config in your package.json selected via an environment variable.

PGlite-powered zero-sync development backend. No Docker required.

Initializes a handful of (empty) template collections to your generator, such as docs, includes, badges, and layouts, along with a few generic defaults.

Dynamodb migrations for devops

🌾 OATS - OpenAPI TypeScript Sync. The missing link between your OpenAPI specs and TypeScript applications. Automatically watch, generate, and sync TypeScript clients from your API definitions.

A comprehensive AI code detection and analysis CLI tool for tracking AI-generated code in projects

A command line utility for the Unity Game Engine.

<div align="center"> <a href="https://twenty.com"> <picture> <img alt="Twenty logo" src="https://raw.githubusercontent.com/twentyhq/twenty/2f25922f4cd5bd61e1427c57c4f8ea224e1d552c/packages/twenty-website/public/images/core/logo.svg" height="12

A compact testing module for node.js.

MCP server for Salesforce B2C Commerce Cloud development assistance including logs, debugging, and development tools

AI-powered development workspace with kanban, terminal bridge, and skill management

Model Context Protocol (MCP) server that provides comprehensive SQLite database interaction capabilities

This command line interface provides a belt full of tools that make building microservices using [micro](https://github.com/vercel/micro) a breeze! It's only meant to be used in development, **not in production** (that's where [micro](https://github.com/v

AI-powered development workflow management system with multi-model support

Promptbook: Turn your company's scattered knowledge into AI ready books

A webpack plugin that use externals of CDN urls for production and local node_modules for development

A Vue 3 plugin that adds HTML comments around components for easier debugging

SINAPSE AI: Framework de orquestracao de IA — 18 squads, 186 agentes especializados

AI-powered CLI for development and research tasks

Development toolkit for styling workflows and utilities

Visual debugging tools for ForesightJS - mouse trajectory prediction and element interaction visualization

A stream implementation of the bunyan cli tool's pretty printing capabilities

Local development CLI for CodeYam analysis

Relay Agentic Development Environment — remote web interface for AI coding agent sessions

A webpack loader that adds location metadata to JSX elements for development debugging

Chain-orchestrated development pipeline: /bms-speckit takes requirements and runs brainstorm → constitution → specify → plan → tasks → analyze → implement → verify with per-step error handling

Simple versioning for assets in express.js

Autonomous Coding Agent with Self-Review, Quality Convergence, and Production-Ready Output

Autonomous development system for Claude Code — describe what you want, get production-ready code

Synkra AIOX: AI-Orchestrated System for Full Stack Development - Core Framework

FISHI — Your AI Dev Team That Actually Ships. Autonomous agent framework for Claude Code.

Generate a license file. Choose any of the licenses supported by https://github.com/github/choosealicense.com.

npm link together local modules && npm install remaining dependencies

Simple HTTP Server for static files. Intended as testing and development tool

Automatically install post-commit hooks for your npm modules.

Simple utility to merge package json

A library to retrieve the source location of DOM elements in React applications

Core library for Harness Engineering toolkit

Zero-config Docker-free local database containers. Create, backup, and clone a variety of popular databases.

A flexible, highly available district selector for picking provinces, cities and districts of China.

Collection of Vite plugins for React applications

CMP API Stub code

When using 'webview.html' in vscode extension development, 'HMR' of vue/react is supported.

Multi-agent development system for opencode with persistent knowledge

Simplified `NODE_ENV` handling with webpack

Shared configuration, workflows, and architectural patterns for the Forgespace ecosystem

Thin client for Bootspring cloud MCP, hosted agents, and paywalled workflow intelligence

Flexible generator, which makes your project clean and maintainable.

Playfab SDK for node.js applications

🔥 HMR for Node.js

A Vite plugin that uses TypeScript's tsc to transpile TypeScript sources for seamless bundling.

使用斷言（assert）讓類型斷言（type predicates）運作的實用工具函式 | Use asserts to make type predicates work with better runtime validation

AI Agent Orchestrator - Manages agile software development teams of AI agents

Generate a 10-color palette from a base color

Run a Node.js application for development, with support for auto-reload.

Companion package to 'Extension Development - Auto Reloader' chrome extension, to automatically reload target browser extensions during the extension development process.

AI-powered embedded systems development tool

JSON-driven multi-agent development framework with intelligent CLI orchestration (Gemini/Qwen/Codex), context-first architecture, and automated workflow execution

CiCy Code - AI-powered development environment

CLI tools for Claude Code development workflow

A versatile collection of smart, efficient, and reusable utility functions, classes and types for everyday development needs.

Brackets Server is a server for providing hosted version of the popular code editor Brackets.

Tiny, fast library to increase speed of coding

CLI for AIDA (AI Development Accounting) - Track and measure AI-assisted development

FABER SDK - Development toolkit for AI-assisted workflows

Teamleader's development certificates. Go wild!

A Model Context Protocol server that acts as an intelligent conversation state manager and development guide for LLMs, featuring comprehensive long-term memory with persistent project artifacts

Embedded PostgreSQL server with true concurrent connections - zero config, auto-provision databases

Detects environment (production, staging, test, development, ci) and helps making decision based on that

Extend the Content Security Policy on the fly (for development)

Workspace utilities for monorepo development

A CLI toolkit for AI-assisted software development with phase templates and environment setup

MCP server for AI coding agents - process management, reverse proxy with traffic logging, browser instrumentation, and sketch mode

Tmux pane manager with AI agent integration for parallel development workflows

SDD-AI: Specification-Driven Development with AI — metodologia de desarrollo con IA usando OpenSpec, Claude Code y Cursor