/app-builder

name: app-builder
description: "Main application building orchestrator. Creates full-stack applications from natural language requests. Determines project type, selects tech stack, coordinates agents."
risk: critical
source: community
date_added: "2026-02-27"

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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📦 Templates (13)

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

| Template | Tech Stack | When to Use | |----------|------------|-------------| | [nextjs-fullstack](templates/nextjs-fullstack/TEMPLATE.md) | Next.js + Prisma | Full-stack web app | | [nextjs-saas](templates/nextjs-saas/TEMPLATE.md) | Next.js + Stripe | SaaS product | | [nextjs-static](templates/nextjs-static/TEMPLATE.md) | Next.js + Framer | Landing page | | [nuxt-app](templates/nuxt-app/TEMPLATE.md) | Nuxt 3 + Pinia | Vue full-stack app | | [express-api](templates/express-api/TEMPLATE.md) | Express + JWT | REST API | | [python-fastapi](templates/python-fastapi/TEMPLATE.md) | FastAPI | Python API | | [react-native-app](templates/react-native-app/TEMPLATE.md) | Expo + Zustand | Mobile app | | [flutter-app](templates/flutter-app/TEMPLATE.md) | Flutter + Riverpod | Cross-platform mobile | | [electron-desktop](templates/electron-desktop/TEMPLATE.md) | Electron + React | Desktop app | | [chrome-extension](templates/chrome-extension/TEMPLATE.md) | Chrome MV3 | Browser extension | | [cli-tool](templates/cli-tool/TEMPLATE.md) | Node.js + Commander | CLI app | | [monorepo-turborepo](templates/monorepo-turborepo/TEMPLATE.md) | 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.