AI coding tools are brilliant at turning an idea into a working app in an afternoon. That speed is real, and it is changing how software gets started. But "it runs on my machine" is a long way from software you can safely put in front of paying customers. The demo that wowed everyone on Friday almost always skips the unglamorous engineering that keeps real users safe: security, sound architecture, testing and proper infrastructure.
The good news is that closing that gap is not a rewrite. It is an audit, a prioritised plan, and disciplined hardening that keeps the speed you gained while adding the rigour your users deserve.
What is vibe coding, and why does the code need more work?
Vibe coding is building software by describing what you want to an AI coding tool and accepting the code it generates, often without reading it line by line. It is fantastic for proving an idea quickly. The catch is that these tools optimise for one thing: producing something that runs and looks right in a demo. They do not, on their own, weigh the trade-offs a senior engineer makes about security, data integrity, failure handling and long-term maintainability. That judgement is exactly what stands between a prototype and production.
What do vibe-coded prototypes usually miss?
Prototypes built this way tend to skip the same four areas, every time, because none of them are needed to make a demo look finished:
- Security and data handling. Authentication shortcuts, secrets left in the code, no input validation, and personal data stored without care. This is the highest-risk gap and the one users never see until it fails.
- Architecture that can grow. Logic crammed into one place, no clear separation between parts, and structural choices that work for ten users and collapse under a thousand.
- Testing and reliability. The app handles the happy path it was demoed on, but nothing catches the edge cases, and there are no automated tests to stop a future change from silently breaking what worked.
- Infrastructure and deployment. Running on a laptop or a single improvised server, with no monitoring, no backups, and no repeatable way to ship an update safely.
To that list, real products usually also need proper error handling, observability so you can see problems before customers do, and accessibility and privacy compliance for the market you operate in.
How do you take a vibe-coded app to production?
You do not start over. You follow a planned, prioritised path that treats the prototype as a valuable head start:
- Audit. Map what the prototype actually does and, more importantly, what it does not. A short, focused review surfaces the security risks, structural weak points and missing tests in days, not weeks.
- Prioritise. Fix the risks that matter most first. Security and data handling come before polish, always. This is where senior engineering judgement earns its keep.
- Harden. Add the rigour a demo skips: secure the data, restructure where it counts, write automated tests, and put monitoring in place so you can see trouble coming.
- Ship, then iterate. Deploy on infrastructure built for production, then improve in controlled steps rather than one risky leap.
Our full guide to taking a vibe-coded app to production walks through each stage in more detail.
Should you rewrite or harden?
In most cases, harden. A rewrite throws away two things you have already paid for: the speed that got you here and the product decisions the prototype quietly validated. Rebuilding from zero also reintroduces risk you have already retired. Hardening keeps what is sound, replaces only what genuinely cannot support real use, and gets you to a trustworthy product faster. A rewrite is the right call only when an honest audit shows the foundations cannot be safely built on, and a good audit will tell you which situation you are in before you commit budget.
Signs your prototype is not ready for real users
Treat any of these as a prompt to get an independent read before you launch:
- It handles sensitive data but you cannot explain how that data is protected.
- Everything works in the demo, but you avoid touching the code because changes break things.
- There are no automated tests, so every release is a leap of faith.
- It runs somewhere you cannot easily monitor, back up or redeploy.
- Only the person (or the tool) who built it understands how it fits together.
Getting the hand-off right
Turning a prototype into production software you can trust is precisely what our Vibe-coded Handover service is built for. We audit what you have, keep the speed you gained, and add the engineering your users deserve, so the momentum of vibe coding turns into a product that holds up. If you have an AI-built prototype and real users on the horizon, get in touch for an honest assessment of what it takes to ship it safely.