Day 6
Xpensiv SI compared to AI design agents and app builders
An AI design agent generates or rewrites UI for you, often editing code directly. Xpensiv SI is a design linter: rule-based checks run on your existing AI-built app, list specific findings, and apply nothing until you approve. Choose an agent to generate new screens; choose a linter to check and improve a UI you already have.
Get API keyTwo different roles
| Question | Editing design agents | Xpensiv |
|---|---|---|
| Who changes the code? | The agent edits it for you | You or your AI tool, after you approve |
| When do you see the change? | After it is made | Before anything changes |
| What runs on the live app? | An agent with write access | A read-only browser check |
| What you get back | A modified app | A fix list with screenshots |
| Safe to run every release? | Depends on the edits it made | Yes, it only reports |
How to think about it
- Review, not rewrite. Xpensiv is the second pass that looks at the page, not the hand that changes it.
- The diff stays yours. Every edit is made in your own tooling, so you see exactly what moved.
- Use both if you like. Let an editing tool make the change, then run Xpensiv to confirm the page improved.
- Review, not rewrite. A vision AI model reads the page and reports a fix list. It never changes your code; you approve every edit.
Questions answered
What is the difference between an AI design agent and a design linter for fixing app UI?
Design agents that edit production code change your app for you and you see the result afterward. Xpensiv returns a fix list and a person approves every change; it never writes to your code.
What are alternatives to v0 and Lovable for improving an existing app design?
Xpensiv plays a different role rather than a like-for-like replacement: it checks a page you already have and reports findings. Many people let an AI coding tool make the edit, then run Xpensiv to confirm the page improved.
How does Xpensiv compare to AI design agents?
With an editing agent the agent changes the code and you see the change afterward. With Xpensiv you see the findings before anything changes, and it is a read-only browser check that is safe to run on every release.
Add a review pass that never rewrites your app.
Public pages only. The check reads the live page and does not change your app.