Make your v0 app production-ready

• Every API key and secret lives on the server, never in frontend code
• Any key that was pasted into a prompt, a chat or a public repo has been rotated

In v0 When you add server actions or API routes, keep secrets server-side and make every action check the user. Anything a client component imports ends up in the browser bundle.

• Permissions are enforced on the data, not just by hiding buttons
• Signed in as two different users, neither can see the other's records

In v0 Protect data in route handlers and the database, not only with redirects in the interface. A server action is a public endpoint: anyone can call it, signed in or not.

• Every table that holds user data has access rules
• Backups run, and one has been restored to prove it works

In v0 If you added Supabase, Neon or another database through Vercel, check that access rules and backups are in place, and decide who owns each row before the first real user signs up.

• A separate staging environment, so changes don't go straight to real users
• The code lives in a Git repository you own, so every change can be reviewed and rolled back

In v0 Use preview deployments as staging, and keep environment variables separate for preview and production.

• Errors and downtime raise an alert, so you hear about problems before users do
• Failed payments, logins and AI calls are logged where a person will see them

In v0 Turn on error tracking and alerts for the production deployment. Build logs tell you it deployed; error tracking tells you it works.

• Usage limits stop a runaway loop or a heavy user from running up the bill
• The right model for each task, with caching where answers repeat

In v0 If you add AI features, call the model from the server with usage limits, and pick the model per task rather than the largest one.