The Gap Between "Works" and "Ready"
Your prototype works. You can click through it, the features do what they should, and it looks good. But there is a meaningful gap between a working prototype and an app that is ready for real users to rely on.
Production-readiness means your app can handle things going wrong gracefully. A user enters unexpected data. Your database gets a spike in requests. Someone tries to access another user's data. A third-party API you depend on goes down. In a prototype, these scenarios cause crashes or confusing errors. In a production app, they are handled smoothly.
The good news: you don't need to solve every production concern on day one. The list below is ordered by priority. Start at the top and work your way down. Each improvement makes your app meaningfully more solid.
Security Essentials
Security is not optional, even for an MVP. One data breach can destroy trust in your product before it has a chance to grow. Here are the non-negotiable basics:
Authentication. Never build your own login system. Use a dedicated service like Clerk or Supabase Auth. These handle password hashing, session management, and account recovery correctly. Ask your AI tool to "implement authentication using Clerk" and it will set up the integration. For a deeper dive, see our security basics guide.
Database access control. If you are using Supabase, you must enable Row Level Security (RLS). Without it, any user can read or modify any other user's data simply by crafting the right API request. Ask your AI tool: "Enable RLS on all Supabase tables and create policies so users can only access their own data."
Input validation. Every form in your app should validate what users type before sending it to your database. The AI might skip this, especially on forms it generates quickly. Ask it to "add input validation to all forms — check for required fields, valid email formats, and reasonable text lengths."
HTTPS. Your app should only be accessible over HTTPS, not plain HTTP. If you are using Vercel, Netlify, or Railway, this is handled automatically. Just verify that the padlock icon appears in the browser's address bar when you visit your app.
Performance Basics
A slow app feels broken, even if everything works correctly. These three optimizations cover 80% of the performance improvements most vibe-coded apps need.
Image optimization. Large, uncompressed images are the most common performance problem. Ask your AI tool to "convert all images to WebP format and add lazy loading so images below the fold don't load until the user scrolls to them." This alone can cut page load times in half.
Caching. If your app fetches data from a database, it probably fetches the same data repeatedly. Ask your AI to "add client-side caching so the app doesn't re-fetch data that hasn't changed." Frameworks like Next.js and tools like React Query handle this well.
Code splitting. Modern frameworks can split your app into smaller pieces that load on demand instead of loading everything upfront. If you are using Next.js (which Lovable and many Cursor projects use by default), this happens automatically for page-level routing. For large components, ask the AI to "lazy load the settings page so it only loads when the user navigates to it."
Error Monitoring
When your app is running on the internet, errors will happen. The question is whether you know about them. Without error monitoring, users encounter problems and leave — and you never find out why.
Sentry is the most popular error monitoring tool for web apps. It captures errors automatically, groups them by type, and shows you exactly which line of code caused the problem, along with the user's browser, device, and what they were doing when it happened.
Setting up Sentry is straightforward: create a free account, install the SDK (ask your AI tool to "add Sentry error tracking to the app"), and you are done. The free tier covers 5,000 error events per month, which is more than enough for a new app.
At minimum, set up email alerts for new error types. When a new kind of error appears, you want to know about it before your users start complaining on social media.
When to Graduate from Your App Builder
If you started with Lovable or Bolt and your app is growing, you might wonder when it is time to switch to a code editor like Cursor.
Here are the signs that you have outgrown your app builder:
- You are hitting generation limits regularly. App builders limit how many AI generations you get per day or month. If you are constantly waiting for limits to reset, a code editor gives you more control over AI usage.
- You need custom integrations. App builders handle common integrations (Supabase, Stripe, Clerk) well. But if you need to connect to a niche API, implement complex business logic, or use a library the builder doesn't support, a code editor is more flexible.
- You want version control. Git-based version control lets you track every change, revert mistakes, and collaborate with others. Most app builders have limited version history compared to a proper Git workflow.
- Performance needs to be optimized. Fine-tuning performance often requires editing specific files and configuration. Code editors give you direct access to everything.
The transition does not have to be all-or-nothing. Most app builders let you export your code. You can export from Lovable, open the project in Cursor, and continue building from there with full control over the codebase. You don't lose anything — you gain flexibility.
Next step: Choose Your Tech Stack — Understand the six layers of a modern tech stack and pick the right tools for each.