A design-to-dev handoff checklist that prevents rework
Turn a finished mockup into a checklist engineers can build against — every state, edge case and interaction accounted for before a single line of code.
The most expensive design bugs are the ones discovered in QA: the form that has no error state, the table that breaks with long names, the modal with no loading spinner. They are cheap to specify and expensive to retrofit.
This tool reads your screen and produces a build checklist grouped by component, calling out the states and edge cases that are easy to forget. Hand it to engineering alongside the mockup and you cut the back-and-forth that eats sprint time.
The tool for this
📐Design Handoff Spec
Turn a screen description into a developer-ready handoff spec — spacing, type, states, a11y.
Frequently asked questions
How is this different from a normal spec? +
It is action-oriented: each item is a check engineering can mark done, focused on the states and edge cases that cause rework rather than visual values alone.
What edge cases does it cover? +
Empty, loading, error, long-content, and disabled states, plus responsive reflow — the cases mockups usually omit.
Can QA use it too? +
Yes. The same checklist doubles as a test plan, so QA verifies the exact behaviors the spec promised.
Related tools
🔍Usability Audit
Heuristic audit against Nielsen's 10 — each finding with a heuristic, severity and fix.
♿Accessibility (WCAG) Check
Heuristic WCAG 2.2 review — likely issues, the success criterion, impact and fixes.
📐Design Handoff Spec
Turn a screen description into a developer-ready handoff spec — spacing, type, states, a11y.
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