App Builder

This is the entry point for building full-stack apps from scratch with Claude. It reads your request, picks a tech stack from 13 templates (Next.js SaaS, FastAPI, React Native, Chrome extensions, etc.), scaffolds the directory structure, then coordinates specialized agents to build frontend, backend, and database pieces. Think of it as the project manager that kicks off the whole process. The workflow is solid: detect project type, choose stack, create plan, delegate to agents. It's opinionated about 2025 defaults but supports alternatives. Best for greenfield projects where you want the entire scaffold handled, not for adding features to existing codebases where you'd use the feature-building flow instead.

skills.sh installs: 953
GitHub stars: 43.1K
last updated: Jul 14, 2026

View on GitHub

Install

$ npx -y skills add sickn33/antigravity-awesome-skills --skill app-builder --agent claude-code

Installs into .claude/skills of the current project.

Files

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