Localhost Checkpoint

What this is

Localhost is the private preview of your Vibe 102 starter app.

This checkpoint proves the empty React + Vite + Tailwind project can run before the real app idea enters the IDE.

Why it matters

If localhost is broken, every build prompt after this becomes guessing.

Fix the engine first. Choose the mini app only after the starter project opens in the browser.

What to do

Open the terminal inside the project folder.

First check that package.json exists.

Then run:

npm install
npm run dev

Open the localhost link shown in the terminal.

Stop only when this is true:

The starter app opens on localhost.
The browser shows the default Vite/React page or a simple starter page.
No mini app features have been built yet.

If localhost fails, use Prompt Rescue Sheet and fix setup only.

Common mistakes

• Running npm run dev outside the project folder.
• Closing the terminal that is running localhost.
• Ignoring a terminal error and moving to app prompts anyway.
• Asking AI to build the first feature before the browser opens.