Every new AI code change breaks something else
You ask for one small change and three other things stop working. That is usually not bad luck. It points to missing boundaries, tests or technical coherence. We find out where that fragility comes from.
Does this sound familiar?
The pattern often becomes visible once the codebase grows and several parts depend on each other.
A simple feature causes unexpected bugs
Functionality on other screens or flows suddenly stops working.
The same bug comes back later
A bug gets fixed, but nothing prevents it from reappearing.
Refactors are almost impossible
Too many parts turn out to depend on each other implicitly.
You mostly rely on clicking through by hand
After every change someone has to walk through the whole application to see whether everything still works.
Where do you want to be?
You want to be able to make changes again without discovering afterwards, every time, what collateral damage they caused.
Changes stay local
A change only has effects in the places where you expect them.
Regressions are found quickly
Tests and checks flag problems before users discover them.
Development becomes truly fast again
Less repair work means AI-assisted development saves time once more.
Why does this happen?
AI coding tools are strong at local changes. They don't automatically know all the implicit agreements that run through a growing product.
See how we approach thisTests don't cover critical agreements
The AI gets little feedback when a change breaks existing functionality.
Parts are too tightly coupled
A local change affects state, data or behaviour in unexpected places.
Interfaces are not clear enough
The codebase doesn't show well enough which contracts must stay stable.
Vibe Code Rescue Audit
A Vibe Code Rescue Audit first finds out why changes cause so much collateral damage. We can then tackle the most important technical causes in a focused Rescue Sprint.
View this offer€2,950 excl. VAT
Fixed price · one existing application or codebase
- Result
- Technical grip on what exists and a prioritised rescue plan
- Duration
- About two weeks
- Next step
- A Rescue Sprint for the most important problem, or continue yourself
Why 9to5 for this?
The AI doesn't need to write less code. The codebase needs enough feedback and structure to make errors visible quickly.
View casesTests where they add value
We test critical contracts and flows, not every detail for a percentage.
Clear technical boundaries
Fewer hidden couplings means fewer unexpected regressions.
Practical AI guardrails
The development workflow helps coding agents stay within the architecture.
What else fits your situation?
Rescue Sprint · €5,950 excl. VAT
One week of senior engineering focused on one clear technical rescue goal. No retainer and no endless engagement.
View offerNobody understands the generated code anymore
The software grows fast, but its structure and technical choices have become so opaque that changes are getting riskier and riskier.
View use caseWe're missing tests, evals or monitoring
The AI functionality runs, but nobody can objectively see whether changes make it better, worse or quietly break something.
View use case