What Vibe Coding Actually Is

Vibe coding is building software by describing what you want and accepting what the model produces, without reading every line. It sounds reckless, and in some contexts it is. In others it is simply the fastest way to find out whether an idea is worth pursuing at all. The mistake is not using it. The mistake is not knowing which mode you are in.

Where It Works Brilliantly

• Throwaway prototypes you build to test an idea with five people
• Internal tools with a handful of trusted users and no sensitive data
• Scripts, data migrations, one-off automations
• Landing pages and marketing experiments with a short lifespan
• Exploring an unfamiliar library before committing to it

In all of these the cost of being wrong is low, the lifespan is short, and nobody inherits the code. That is exactly the zone where speed beats craft.

Where It Quietly Costs You Money

The trouble starts when a prototype gets users. Nobody makes a decision to promote it — it just happens. Six months later a business depends on code nobody has ever read.

• Anything handling payments, personal data or access rights
• Anything that will be extended by another developer later
• Anything where downtime costs real revenue
• Anything that has to pass an audit, a review or a compliance check
• Anything you will have to explain to an investor or a buyer

The Three Failures That Show Up Later

Generated code rarely fails loudly on day one. It fails quietly, months later, in three recognisable ways.

• No shared structure — every feature is written in a slightly different style, so changes become risky
• Invisible security gaps — validation on the client only, secrets in the bundle, endpoints with no access checks
• Unowned dependencies — packages nobody chose, versions nobody tracks, upgrades nobody dares to run

How to Use It Safely

• Decide up front whether this code is disposable or permanent, and say it out loud
• Keep a real boundary: generated UI is fine, generated auth and payments need review
• Make the machine prove it works — tests, types, a linter, a CI that can fail
• Read the parts that touch money, data and access, even if you read nothing else
• When a prototype gets its first paying user, schedule a rewrite of the core, not a patch

Conclusion

Vibe coding is a legitimate tool with a narrow, useful job: getting from an idea to something you can look at, fast. It is not a replacement for engineering, and treating it as one is how companies end up paying twice. Use it to find out what to build. Then build it properly.