Your Vibe-Coded App Works. Is It Any Good?

The app runs. The demo works. It’s deployed to a real URL that a person can send to a friend. For most people building with AI for the first time, that is the finish line. In reality it is closer to the halfway point.

“Works” and “good” are two different questions, and they tend to get answered by two different things. A modern AI agent is remarkably good at the first one. Describe what is wanted, and it will produce something that runs, often on the first try. Whether that something is any good – whether it is secure, whether it does what was actually intended rather than what was demonstrated, whether it will hold up when someone other than its creator uses it – is a separate question that AI agents are much less reliable about. That question is where the real work, and the real learning, lives.

This is the natural next step after a first vibe-coded project. The building is done. Here is what to do with the thing that got built.

AI Generates the Bricks. Someone Still Builds the House.

There is a useful way to frame what AI does and does not do in this process: it produces the raw material, not the finished structure. An agent can generate working code in seconds. Whether that code belongs in a thing real people will use is a judgment call, and that judgment has to stay with a person, not the model.

This is the same problem the broader industry keeps circling. The distance between an absolute beginner, a software creator, and a productive developer has never been smaller. But the layer of expertise that used to sit in the middle – the years a developer spent wrestling with real problems on a team, slowly learning what “good” actually looks like – is harder to come by when AI compresses the early part of the journey. The good news for a software creator is that this gap is not just something to worry about. It is something to act on. The act is auditing what gets built, and it can start on the very first project.

A Part Of Software Creation That Nobody Warns You About

Fast can mean exposed. An app that took an afternoon to build can go live and, within hours, leak every piece of data its users handed it.

This is not a hypothetical.

Beginner-built apps have shipped to production with databases left wide open by default, with no authentication on endpoints that should have required it, with secret keys committed straight into public code. The build felt finished because it ran. The part that was missing was invisible until it wasn’t.

The reason this happens so often is structural. When AI handles the setup and the boilerplate, it also quietly handles a hundred small decisions that a person building the slow way would have at least seen go by. Some of those decisions are about security. Most defaults are designed to make the thing work, not to make it safe, and “working” and “safe” are not the same default. A software creator who never learned the underlying concepts may not know what went wrong, may not know where to look, and may not know what to ask next time. But if they treat the audit as part of the job, they have a real shot at catching it before anyone else does.

The Move: Build First, Then Audit

“Audit” sounds like a senior-engineer word, something that happens in a conference room with a checklist and a compliance officer. For a first project it is much smaller and much more useful than that. It is a short set of questions to ask of a thing that already exists. The questions are the whole skill.

1. Does it do what it was meant to do, or only what it was demoed to do? A demo runs the happy path: the right input, the expected click, the one flow that was rehearsed. Real use is messier.
2. What happens with an empty field, a wrong file type, a button pressed twice?
3. Is anyone’s data sitting out in the open? If the app stores anything — an email address, a login, a single uploaded photo — the question is who can reach it. Can a stranger read the database?
4. Is anything sensitive printed into the code itself?
5. Could the build be explained to someone else? Not line by line, but in plain terms: what are the moving parts, and what does each one do? An honest “no” here is not a failure. It is the single most useful flag a new builder can find, because it points exactly at what to learn next.
6. What did the AI quietly skip? Every agent makes trade-offs to get to “it runs.” Error handling, validation, security practices that would slow down a first draft — these are the things most likely to be left out, and the most worth asking about directly.
7. What happens when it is not just one person using it? An app built and tested by an audience of one behaves differently when ten people, or ten thousand, show up at once. Even imagining that shift surfaces problems the solo demo never could.

None of these require knowing the answer in advance. They require knowing to ask. And the most efficient way to get the answers is to ask the same tool that wrote the code in the first place.

Using AI to Audit AI

The most common mistake with an AI agent is using it as a grunt worker or telling it what to type and accepting whatever comes back. Used as a coach instead, the same tool becomes one of the best ways to learn ever invented. That coaching move applies just as well to evaluation as it does to building. The trick is to point the agent back at its own output and ask it to be critical.

A handful of prompts do most of the work:

• “Walk me through this code line by line and explain what each part does.”
• “What security practices did you skip to get this working?”
• “What would you change about this before real people used it?”
• “Where is user data stored, and who can access it right now?”
• “What would a senior engineer flag in this code?”

The answers do two things at once. They surface concrete problems to fix, and they teach the concepts behind those problems in the exact context where they matter. A new builder who reads the explanation of why a database connection was insecure learns more about security in five minutes than a week of abstract tutorials would deliver, because the lesson is attached to something they made and care about.

This is the difference between a coach and a crutch. Asking AI to explain why code works the way it does, to unpack what it skipped, to walk through its own reasoning, is learning. Letting it write the project while nodding along, then letting it declare the project finished, is the same trap as following tutorials forever…just with a chatbot instead of a video.

Start Your Own Pre-Flight Checklist

Experienced developers often build a personal checklist they run before launching anything, sometimes dozens of items long, built over years of successful and unsuccessful launches. Each line on it represents a specific thing that broke once, badly enough to be worth never repeating. The checklist is not something they were handed. It is the compressed record of everything that has ever gone wrong.

A software creator can start one immediately, and it will be one of the highest-return habits in the whole process. The first version might have a single item on it. Every time something breaks, or an audit turns up a problem, or the AI points out something that was skipped, it gets one more line. Over months, that growing list becomes the thing the missing middle layer used to provide: a hard-won sense of what to check, what tends to go wrong, and what “done” actually means.

This is also where the accumulated questioning pays off. Each audit adds to your list. The list makes the next audit faster and sharper. Over time the questions that once had to be looked up become the questions a builder asks automatically, which is a working definition of expertise.

The Work Turns A Casual Enthusiast Into A Software Creator

You don’t get taste or judgement from a tutorial. You get it from building real things, breaking them, examining what broke, and comparing notes with other people doing the same. AI has made the building fast. But it can’t look hard at what they made and decide whether it is actually good.

That is the part worth getting good at, and it is best learned alongside other people.

An MLH hackathon is a place to ship something and break it in a weekend with others a few steps ahead.

DEV is where the audit becomes a post: what was built, what went wrong, what the code review turned up, what got fixed.

Build your creation in one, write down what it taught you in the other, and the next person who ships their first app gets to start a little further along than you did.

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