Verify in Browser

Use this skill proactively after making code changes to verify the app actually works. Don't just trust that the code is correct — launch it and check.

Steps

1. Start the dev server in the background — check if one is already running by listing terminals. If not:

   npm run dev
   

   Set block_until_ms: 0 to run it in the background. Then poll until you see the "ready" message with the localhost URL.

2. Open in the side browser — launch the app beside your code:

   Tool: browser_navigate
   Arguments: { "url": "http://localhost:3000", "position": "side", "take_screenshot_afterwards": true }