UI review for executives

If you own product quality at the org level, the expensive failures are rarely that the TypeScript was wrong. They are product experience failures that passed source review, looked shippable, and then hit brand, conversion, support load, or governance. Diffraction is private MVP / design-partner ready UI review (product experience review) for UI-affecting GitHub PRs on web apps. Findings are aberrations: verified product experience failures with evidence. Tagline: See the full spectrum of every diff.

Aberration (exec framing): An aberration is a verified product-experience failure found while reviewing a running UI: the kind of miss that survives green checks and still costs brand trust, conversion, or cleanup after merge.

Source correctness ≠ product correctness: A clean diff and passing checks do not prove the product still works for a user. Executives feel that gap in incidents, churn, and war rooms, not in the PR comment thread.

You already fund code review, CI, maybe pixel baselines, maybe a source-oriented PR bot. Those reduce some classes of risk. They do not systematically answer: did this UI-affecting change still leave a working product?

The failures that get expensive later often look fine earlier:

• A flow that renders and still fails for a cold user
• A default or confirmation that invites a costly mistake
• A login wall, dead end, or permission gate in the wrong place
• A silent mismatch between what design intended and what shipped

Visual bugs or broken layouts can show up here as one kind of costly aberration. They are not the category. The category is product experience review of the running change: brand, conversion, and governance risk that source correctness alone does not catch.

Public cautionary tales (link titles only; Diffraction does not claim these figures as product outcomes):

Three checkboxes almost cost a billion dollars

Six people and a national signup flow

The button costing $300 million a year

Thesis: source correctness ≠ product correctness.

Diffraction is UI review / product experience review aimed at UI-affecting GitHub PRs on web apps.

For design partners, it is built to surface aberrations with evidence before merge, so leadership risk is not only whether eng reviewed the diff, but whether someone experienced the product this PR would ship.

What that buys at the exec layer:

• A named practice for the gap between green CI and product truth
• Fewer post-merge surprises that become brand or conversion incidents
• Clearer ownership language for eng leads and platform without pretending pixel tools already closed the job
• Governance-friendly evidence when something wrong almost shipped: repro path, not vibes

Adjacent practices stay useful. Pixel baselines catch visual drift. Source-only PR bots speed code review. Neither replaces experiencing the running PR head. Longer take: UI review vs visual testing. Category: What is UI review?. Terms: Glossary.

You do not need every executive in every PR. You need the org to treat UI-affecting changes as product risk, not only code risk.

1. Eng and product already ship web apps through GitHub.
2. UI-affecting PRs are the control point before blast radius goes live.
3. Diffraction (private MVP, design-partner scoped) is aimed at reviewing the PR head as a running experience and returning verified aberrations with evidence.
4. Eng leads and reviewers act on findings; executives get a cleaner signal that the practice exists, instead of discovering gaps in production metrics.

This is not a promise of zero incidents. It is a practice and a tool shape for the failure mode you already pay for after merge.

Other roles: designers and QA, engineers, and engineering leads.

If you are a CTO, CEO, or CPO (or you sponsor eng quality) and want early design-partner access to a private MVP, email hello@diffraction.sh.

Say who you are, what you ship, and where product experience failures still escape after merge. Design-partner interest is welcome.

See the full spectrum of every diff.