app-builder — community app-builder, Synapse-Desktop, community, ide skills, Claude Code, Cursor, Windsurf

v1.0.0
GitHub

About this Skill

Perfect for Development Agents needing automated application building and tech stack planning. Extract codebase context for any LLM (ChatGPT, Claude, Gemini) and safely apply AI-suggested patches with preview,

HaoNgo232 HaoNgo232
[0]
[0]
Updated: 3/5/2026

Agent Capability Analysis

The app-builder skill by HaoNgo232 is an open-source community AI agent skill for Claude Code and other IDE workflows, helping agents execute tasks with better context, repeatability, and domain-specific guidance.

Ideal Agent Persona

Perfect for Development Agents needing automated application building and tech stack planning.

Core Value

Empowers agents to analyze user requests, determine optimal tech stacks, and coordinate application structure using keyword matrices and project type detection, all while safely applying AI-suggested patches with preview.

↓ Capabilities Granted for app-builder

Automating project setup with default tech stacks
Generating application structures based on user requests
Coordinating agent workflows for efficient app development

! Prerequisites & Limits

  • Requires access to project-detection.md and tech-stack.md files
  • Limited to applications with predefined keyword matrices and project types
Labs Demo

Browser Sandbox Environment

⚡️ Ready to unleash?

Experience this Agent in a zero-setup browser environment powered by WebContainers. No installation required.

Boot Container Sandbox

app-builder

Install app-builder, an AI agent skill for AI agent workflows and automation. Works with Claude Code, Cursor, and Windsurf with one-command setup.

SKILL.md
Readonly

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

📦 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 3 + 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
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:
   ├─ Database schema (users, posts, likes, follows)
   ├─ API routes (12 endpoints)
   ├─ Pages (feed, profile, upload)
   └─ Components (PostCard, Feed, LikeButton)
4. Coordinate agents
5. Report progress
6. Start preview

FAQ & Installation Steps

These questions and steps mirror the structured data on this page for better search understanding.

? Frequently Asked Questions

What is app-builder?

Perfect for Development Agents needing automated application building and tech stack planning. Extract codebase context for any LLM (ChatGPT, Claude, Gemini) and safely apply AI-suggested patches with preview,

How do I install app-builder?

Run the command: npx killer-skills add HaoNgo232/Synapse-Desktop. It works with Cursor, Windsurf, VS Code, Claude Code, and 19+ other IDEs.

What are the use cases for app-builder?

Key use cases include: Automating project setup with default tech stacks, Generating application structures based on user requests, Coordinating agent workflows for efficient app development.

Which IDEs are compatible with app-builder?

This skill is compatible with Cursor, Windsurf, VS Code, Trae, Claude Code, OpenClaw, Aider, Codex, OpenCode, Goose, Cline, Roo Code, Kiro, Augment Code, Continue, GitHub Copilot, Sourcegraph Cody, and Amazon Q Developer. Use the Killer-Skills CLI for universal one-command installation.

Are there any limitations for app-builder?

Requires access to project-detection.md and tech-stack.md files. Limited to applications with predefined keyword matrices and project types.

↓ How To Install

  1. 1. Open your terminal

    Open the terminal or command line in your project directory.

  2. 2. Run the install command

    Run: npx killer-skills add HaoNgo232/Synapse-Desktop. The CLI will automatically detect your IDE or AI agent and configure the skill.

  3. 3. Start using the skill

    The skill is now active. Your AI agent can use app-builder immediately in the current project.

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