Browser verification

Check the browser behavior affected by the request. Reuse the task's existing browser session and stay headless unless the user requests a visible browser or an essential interaction needs one; explain that need first.

1. Find the running application

Read the project's server instructions and check its actual port before starting a server:

lsof -nP -iTCP:<port> -sTCP:LISTEN

Never kill or restart an existing dev server.

2. Use the available browser tools