modeinspect
02Design QA

Design QA, in one loop.

Design QA is the review of a built interface against its design before the change merges. Design QA in days, not weeks. Open the initial implementation in Modeinspect, fix and make changes, and hand over only once.

Get startedBook a demo
01

Open any pull request

Comments and handovers are things of the past. Open any pull request in Modeinspect in seconds and see the real, running build.

Opening a pull request inside Modeinspect
02

Fix and polish

Fix the feature with the controls you're already used to. Every change you make is instantly reflected in code, pixel by pixel against the canvas.

Polishing a feature with native design controls
03

Ship

Ship a new pull request with your changes. It opens on top of the original pull request, and engineers review and merge it like any other. Finish design QA in one handover and enjoy the moment. You just saved weeks of round-trips.

Shipping a polished pull request

7× faster Design QA.

The usual round-trip

~3 weeks
  1. Initial QA
  2. 2nd implementation
  3. 2nd QA
  4. 3rd implementation
  5. Final QA

With Modeinspect

~3 days
  1. Design QA edits
Customer story

Prelude went from idea to merged pull request in 13 days.

Prelude's designers build on their own codebase and open the pull requests. Engineering review still gates every merge.

Read the Prelude story
Idea to merged PR
~31 days13 days
Handoffs per feature
5+1

Design QA guide

Design QA: the process, the checklist, and how to catch UI drift

What design QA is, why the build drifts from the design, a step-by-step process, and a checklist you can run on the next pull request.

Read the full guide
What is design QA?

Design QA is the review of a built interface against its design intent before the change merges. It differs from QA testing, which checks requirements, and from visual regression, which checks against a previous build.

Read this section in the guide ↗
Why the build drifts from the design

Handoff assumptions, tokens that never reached the code, states nobody designed, responsive breakpoints, real content lengths and motion are where UI drift comes from.

Read this section in the guide ↗
The design QA process, step by step

When in the sprint it runs, who runs it, what to compare against, how to log findings and how to fix them in the pull request instead of a comment thread.

Read this section in the guide ↗
The design QA checklist

Layout and spacing, typography, color and tokens, states and interaction, responsive, accessibility, content and motion. Each group names what to compare against.

Read this section in the guide ↗
Design QA tooling in 2026

Figma Dev Mode compare, Chromatic and Percy visual regression, Playwright snapshots, Storybook, browser dev tools and Modeinspect for fixing the build in the pull request.

Read this section in the guide ↗
Design debt and UX debt: the cost of skipping design QA

Every finding that ships becomes design debt, and unresolved design debt compounds into UX debt that a redesign pays for later.

Read this section in the guide ↗
Design QA for designers who can fix it themselves

When the designer can open the pull request, adjust spacing, states and type with design controls and ship a new PR, design QA takes one handover instead of five.

Read this section in the guide ↗

Questions

Design QA is the review of a built user interface against its design intent before the change merges. It covers layout, typography, color and tokens, states, responsive behavior, motion, content and accessibility, and it ends with the differences fixed rather than filed.
QA testing checks whether the feature works against its requirements. Design QA checks whether the built interface matches the design and the design system, and a feature can fail that check while every test passes.
The designer who owns the screen runs the design QA pass, because they hold the intent the build is compared against. The engineer stays the code reviewer and the merge gate.
Design QA happens on the pull request or preview build, before merge. After release, every finding competes with new work for a place in the backlog and rarely wins it.
A design QA checklist groups checks by layout and spacing, typography, color and tokens, states and interaction, responsive behavior, accessibility, content and motion. Each group names what to compare against: the design file, the design system tokens in code, the written states or real data.
Visual regression testing compares screenshots of the current build with an approved baseline from a previous build, so it catches unintended change. Design QA compares the build with the design, so it catches drift that was there from the first build.

Also in the loop.

Design to codeFrom a Figma file, a screenshot, or the canvas straight to a pull request on your codebase.Explore
AI PrototypingPrototypes that feel like the product, built on your codebase with real data.Explore
Developer ExperienceScoped, type-safe PRs in your conventions that engineers want to merge.Explore
Design QA in codeThe guide chapter: run the checklist on the pull request and fix what you find.Explore
After handoffWhy the build drifts from the design, and how to fix it without another ticket.Explore
Customer storyHow Prelude ships production-grade PRs from design, idea to merged in 13 days.Explore

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