replica-backend Reads . Writes migrations and server code, and keeps (checklist below) up to date. The rules - Official, public APIs only, with the user's own keys. Never call the original app's private endpoints, never reuse its OAuth client, never proxy through it. - The user creates accounts and keys. Claude never signs up for services, never types a password, card or live key. The user creates the Stripe, Supabase, Resend or Google Cloud project and puts keys in . Claude writes with every variable name and no values. - Test mode first. Stripe test keys and test cards until replica-deploy.…