# UI review for engineering leads

> Confidence and efficiency at the PR boundary. Fewer post-merge product surprises without turning every PR into a manual QA session. hello@diffraction.sh.

Canonical: https://www.diffraction.sh/for/engineering-leads

## TL;DR

You own merge velocity and the quality bill after merge. UI-affecting PRs are where those conflict: the team cannot manually QA every change, and source-only review still misses product failures.

Diffraction is private MVP / design-partner ready UI review (product experience review) for UI-affecting GitHub PRs on web apps. Findings are aberrations with evidence. Tagline: See the full spectrum of every diff.

## Quotable definitions

Aberration (eng-lead framing): a verified product-experience failure found while reviewing a running UI: the post-merge surprise you would rather catch at the PR boundary.

UI review at team scale: the practice of checking UI-affecting PRs as running product experiences so the team gains confidence without staffing a human click-through on every diff.

## Problem for engineering leads

Broken layouts may appear as one aberration among others. The job you need named is product experience review at the PR boundary, not another screenshot gate.

Thesis: source correctness ≠ product correctness.

Category: https://diffraction.sh/ui-review. Contrast: https://diffraction.sh/ui-review-vs-visual-testing.

## What Diffraction gives engineering leads

More confidence that UI-affecting PRs were experienced, not only read. Efficiency: signal on the PRs that change product behaviour, without mandating full manual QA on every merge.

Terms: https://diffraction.sh/glossary.

## How it fits eng-lead workflow

Put the practice on UI-affecting PRs. Keep ceremony low. Measure fewer how-did-that-ship moments without hiring a human to click every PR.

https://diffraction.sh/blog/three-checkboxes-almost-billion-dollars

https://diffraction.sh/blog/six-people-national-signup-flow

https://diffraction.sh/blog/button-costing-300-million-a-year

## Soft product bridge

If you lead an eng team shipping web apps on GitHub and want early design-partner access to a private MVP, email hello@diffraction.sh.

Soft CTA only: hello@diffraction.sh. Sibling pages: https://diffraction.sh/for/executives, https://diffraction.sh/for/designers-and-qa, https://diffraction.sh/for/engineers.