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.
| File | Description | When to Read |
|---|---|---|
project-detection.md | Keyword matrix, project type detection | Starting new project |
tech-stack.md | 2026 default stack, alternatives | Choosing technologies |
agent-coordination.md | Agent pipeline, execution order | Coordinating multi-agent work |
scaffolding.md | Directory structure, core files | Creating project structure |
feature-building.md | Feature analysis, error handling | Adding features to existing project |
templates/SKILL.md | Project templates | Scaffolding new project |
📦 Templates (14)
Quick-start scaffolding for new projects. Read the matching template only!
| Template | Tech Stack | When to Use |
|---|---|---|
| nextjs-fullstack | Next.js 16 + Prisma | Full-stack web app |
| nextjs-saas | Next.js 16 + Stripe | SaaS product |
| nextjs-static | Next.js 16 + Framer | Landing page |
| astro-static | Astro 5 | Static/content site |
| nuxt-app | Nuxt 3 + Pinia | Vue full-stack app |
| express-api | Express + JWT | REST API |
| python-fastapi | FastAPI | Python API |
| react-native-app | Expo + Zustand | Mobile app |
| flutter-app | Flutter + Riverpod | Cross-platform mobile |
| electron-desktop | Electron + React | Desktop app |
| chrome-extension | Chrome MV3 | Browser extension |
| cli-tool | Node.js + Commander | CLI app |
| monorepo-turborepo | Turborepo + pnpm | Monorepo |
🔗 Related Agents
| Agent | Role |
|---|---|
project-planner | Task breakdown, dependency graph |
frontend-specialist | UI components, pages |
backend-specialist | API, business logic |
database-architect | Schema, migrations |
devops-engineer | Deployment, preview |
⚠️ Common Mistakes
| Error | Fix |
|---|---|
| Elegir tech stack sin preguntar | Hacer preguntas Socráticas primero |
| Crear código sin plan | Crear {task-slug}.md antes de escribir código |
| Usar template incorrecto | Leer tabla de templates y elegir el más cercano |
| Ignorar checkpoints | Verificar PLAN.md existe antes de proceder |
Usage Example
code
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