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App Builder

Free

Orchestrate full-stack application development from natural language.

by vudovn8.1k stars on vudovn/ag-kit
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Updated Jul 30, 2026
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Free Β· Opens the source repo

What App Builder does

App Builder is a powerful tool designed to streamline the process of creating full-stack applications by interpreting natural language requests. It serves as an orchestrator that not only analyzes user inputs to determine the type of project but also selects an appropriate tech stack and coordinates various agents to execute the build process. This skill is particularly beneficial for developers and designers looking to quickly prototype applications without getting bogged down in the minutiae of setup and configuration.

The skill operates by first identifying the project type based on user input. For instance, if a user requests to build a social media application, App Builder will recognize this and suggest a tech stack that is well-suited for that purpose, such as Next.js combined with Prisma and other relevant technologies. It then generates a comprehensive plan that outlines the necessary components, database schema, API routes, and user interface elements, ensuring that all aspects of the application are covered.

App Builder also includes a variety of templates for different types of applications, such as web apps, mobile apps, and APIs. These templates provide a quick-start scaffolding that can significantly reduce the time required to set up a new project. Users can select from options like Next.js for full-stack development or Flutter for cross-platform mobile applications, making it versatile for various development needs.

This skill is ideal for developers who want to accelerate their workflow by automating the initial stages of application development. It allows teams to focus on building features rather than getting lost in setup, making it a valuable addition to any development toolkit.

When to use it

Use App Builder when you need to quickly scaffold a new application based on a natural language description.

When not to use it

This skill may not be suitable for highly customized projects that require extensive manual configuration or for users who prefer hands-on control over every aspect of their application.

What you can build with it

Quickly Scaffold a New Web App

Use App Builder to create a full-stack web application by simply describing the desired features in natural language.

Rapid Prototyping for Mobile Apps

Leverage App Builder to set up a cross-platform mobile application, allowing you to focus on design and functionality.

API Development Made Easy

Utilize App Builder to scaffold a REST API by specifying endpoints and data requirements in your request.

How to install App Builder

View source

1. Install with the skills CLI

npx skills add vudovn/ag-kit/app-builder --agent claude-code

2. Or install it manually

Download the skill folder and drop it into ~/.claude/skills/ for all projects, or .claude/skills/ to scope it to one repo. Restart Claude Code so it picks up the new skill.

Anthropic's agentic coding CLI, and the reference implementation of Agent Skills. Drop a skill folder into ~/.claude/skills and Claude Code loads it automatically whenever a task matches the skill's description. Claude Code docs

Inside SKILL.md

Written by vudovn

App Builder - Application Building Orchestrator

Analyzes user's requests, determines tech stack, plans structure, and coordinates agents.

🎯 Selective Reading Rule

Read ONLY files relevant to the request! Check the content map, find what you need.

FileDescriptionWhen to Read
project-detection.mdKeyword matrix, project type detectionStarting new project
tech-stack.md2026 default stack, alternativesChoosing technologies
agent-coordination.mdAgent pipeline, execution orderCoordinating multi-agent work
scaffolding.mdDirectory structure, core filesCreating project structure
feature-building.mdFeature analysis, error handlingAdding features to existing project
templates/SKILL.mdProject templatesScaffolding new project

πŸ“¦ Templates (13)

Quick-start scaffolding for new projects. Read the matching template only!

TemplateTech StackWhen to Use
nextjs-fullstackNext.js + PrismaFull-stack web app
nextjs-saasNext.js + StripeSaaS product
nextjs-staticNext.js + FramerLanding page
nuxt-appNuxt 4 + PiniaVue full-stack app
express-apiExpress + JWTREST API
python-fastapiFastAPIPython API
react-native-appExpo + ZustandMobile app
flutter-appFlutter + RiverpodCross-platform mobile
electron-desktopElectron + ReactDesktop app
chrome-extensionChrome MV3Browser extension
cli-toolNode.js + CommanderCLI app
monorepo-turborepoTurborepo + pnpmMonorepo
astro-staticAstro + MDXBlog / Documentation

πŸ”— Related Agents

AgentRole
project-plannerTask breakdown, dependency graph
frontend-specialistUI components, pages
backend-specialistAPI, business logic
database-architectSchema, migrations
devops-engineerDeployment, preview

Usage Example

User: "Make an Instagram clone with photo sharing and likes"

App Builder Process:
1. Project type: Social Media App
2. Tech stack: Next.js + Prisma + Cloudinary + Clerk
3. Create plan:
   β”œβ”€ Database schema (users, posts, likes, follows)
   β”œβ”€ API routes (auth, posts, likes, follows)
   β”œβ”€ Pages (feed, profile, upload)
   └─ Components (PostCard, Feed, LikeButton)
4. Coordinate agents
5. Report progress
6. Start preview

Frequently asked questions about App Builder

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