Start App

Auto-detect project type and start any application on localhost. Finds an available port that doesn't conflict with any existing processes, determines the correct start command, and launches the development server.

Command

/start-app or start-app

Navigate

Development & Local Server

Keywords

start app, run app, start server, run server, localhost, dev server, start development, run development, npm start, npm run dev, python run, go run, streamlit, flask, django, fastapi, rails, cargo run, start project, launch app, open app, run project, serve, live server

Description

Automatically detects the project type from configuration files, determines the correct start command, finds an available port that doesn't conflict with any running processes, and starts the application on localhost. Supports Node.js (React, Next.js, Vite, Express, Astro, Remix, Nuxt, SvelteKit), Python (Streamlit, Flask, Django, FastAPI, Uvicorn), Go, Rust, Ruby (Rails, Sinatra), Java (Maven, Gradle), PHP (Laravel, Artisan), and static sites.

Execution

This skill runs using Claude Code with subscription plan. Do NOT use pay-as-you-go API keys. All AI operations should be executed through the Claude Code CLI environment with an active subscription.