You built it in Lovable, Bolt, Replit, v0 or Base44 and people use it. Now each prompt fixes one screen and quietly breaks another, and a customer has asked a security question you can't answer.

The Hardening Sprint takes the app from "works in the demo" to safe for paying users, and keeps the builder useful for screen work afterwards.

Data and keys first: row-level security fixed with a test for each policy, exposed keys rotated, secret calls moved server-side.

Billing next: access follows signed Stripe webhooks, with each event processed once.

Then the ground under it: the code in GitHub, a staging environment, migrations, error tracking on the paths that earn money, and a deploy pipeline that runs the tests.

Last, a handover: what changed, why, and how to keep prompting without undoing it.

A demo every Friday. Fixed price agreed before work starts. You own all of it.

The person on your first call writes your code.

Send me the app link and what's breaking. Not sure where to start? Book the Ship Check first.