For builders shipping this week
Monitor a Lovable app signup before you send the link.
Lovable will happily ship a polished page whose sign-up form 500s. FirstUser is the visitor who tries it the same hour you publish.
A Lovable project often looks finished the moment the landing page does. The sign-up form, the email confirmation, and the Stripe button are the parts that break after a prompt about “make it production ready.” FirstUser does not review your prompt history. It opens the public URL the way a stranger would.
The free signup test asks for that URL and your email. The run looks for Get started or Sign up, fills a generated identity, and records a screenshot of whatever the app does next. If the form says the account exists, or the page never leaves the form, the report includes a fix prompt written for Lovable: what the tester did, the visible error, and the success state you want.
Paste that prompt back into Lovable, redeploy, and hit the deploy hook if you are on Pro or Team. Starter checks the same URL once a day so a later prompt does not quietly remove the login route.
Use the included Lumenlist sample if you want to see a passing report before you point FirstUser at a real Lovable URL. The sample has a landing page, a sign-up form, a note you can create, and a pricing page with a price on it.