What shipped should match what was designed.

The design was approved.
The release was not.

Every state, every breakpoint, every interaction — with measurements, tokens and behaviour written down rather than implied by a layout.

Colour, type, spacing and radius exported into your codebase in its own format, so nobody retypes a hex value or a pixel figure.

Focus order, labels, roles, keyboard paths and contrast per component. Written for the engineer implementing it, not for an auditor.

Long strings, empty data, huge numbers, missing images, slow networks — the cases that break layouts, specified before they do.

We review the implementation in the browser during the sprint, so corrections are cheap rather than a post-release backlog item.

A pass against the design before release, with a written defect list ranked by severity rather than a vague sense that something looks off.

Spacing is close but not right, states are missing, and nobody can point to when it diverged.

Corrections arrive as a backlog of small tickets that compete with feature work and never get done.

A steady stream of questions that the specs should have answered, interrupting both sides all sprint.

Hundreds of issues found late, most of which are component-level and would have been trivial at design time.

The same component built differently by different squads, because the spec left room for both.

Where the designer and engineer never share a room, ambiguity in a spec is not asked about — it is guessed.

The diff nobodyhad time to check.

Every screen, every breakpoint

Automated comparison between the design and the built implementation across states and viewports, so drift is caught before release rather than reported afterwards.

Prop tables and states, drafted

First-pass component documentation generated from the design file and the component source, then edited by a designer for the parts that need judgement.

The obvious issues, found early

Contrast, label and focus-order problems flagged at design time, so the audit later finds edge cases rather than basics.

It finds differences.A designer decides which matter.

A two-pixel shift may be irrelevant or may break a rhythm. Automated diffing produces a list; triage is a design conversation with engineering in the room.

When your handoff
is already fine

Co-located pairs with a shared design system often need no formal handover at all. Questions get answered in a sentence.

Where components are already specced and tokenised, handoff is mostly solved. The remaining gap is usually just QA.

A single person shipping both sides has no handover problem, only a documentation problem for whoever comes next.

If engineering has no appetite for written specification, the honest fix is co-location and pairing rather than more documents.

Differences between design and build found after release. This is the number the whole engagement exists to reduce.

How often engineering has to ask. Falling counts mean the specs are answering questions before they are asked.

Problems reaching an audit rather than being caught at component level, where they cost almost nothing to fix.

Engineering time spent correcting visual and behavioural defects. Usually the most persuasive figure for a finance conversation.

Share of values coming from tokens rather than hard-coded. Rising coverage means fewer interpretation gaps.

Shorter when nobody is blocked on a question or waiting on a correction cycle.

What handoff
connects