The diff is only half the story
AI agents produce functional code at speed. But speed without UX visibility is how you ship slop. See exactly what agents built before it merges.
AI-generated code has a particular failure mode: it satisfies the literal requirement while missing the spirit.
The agent wrote a form, but did it tab correctly? The agent added a modal, but does it feel right? You can’t tell from the diff. And you can’t keep up reviewing every change manually. The UX is technically correct but subtly wrong. That’s UX slop.
Automatic UX verification
When an AI agent opens a PR, Midstream runs the existing tests and generates demos of every checkpoint. The agent handled the code; you verify the experience.
Visual regression at the interaction level
Not just pixel diffs. You click through the actual flow and feel whether it’s right. Screenshots catch the obvious; interaction catches the subtle.
Scale agent output without scaling risk
Let agents write 10 PRs a day. Each one comes with clickable proof of what it built. Review the experience, not the implementation.
Ship faster without shipping worse
AI agents become higher-leverage because you can trust and verify their output at the UX level. Unlock agent velocity without sacrificing quality.
“Our designers finally review the real thing, not screenshots.”