App Builder

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	2025 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

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Scope and template prerequisites

These13 Markdown templates describe layouts, not complete generated projects. Preserve an existing application's framework, package manager and lockfile; keywords alone do not justify replacing its stack. Template versions are historical baselines and scaffold @latest can produce incompatible layouts/APIs. Check current primary framework docs and host constraints before selecting exact versions. Named agents/tools are optional environment-specific roles, not bundled capabilities or authority to delegate. Honor existing plans rather than requiring a new conflicting filename or three redundant questions. Confirm data/tenant authorization and acceptance examples; keep secrets server-side, review migration effects and use local previews before authorized deployment/publication/payments/messages. Report actual tests, not production-ready guarantees.

📦 Templates (13)

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

Template	Tech Stack	When to Use
nextjs-fullstack	Next.js + Prisma	Full-stack web app
nextjs-saas	Next.js + Stripe	SaaS product
nextjs-static	Next.js + Framer	Landing page
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

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🔗 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

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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

When to Use

This skill is applicable to execute the workflow or actions described in the overview.

Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.