Design handoff

A handoff gives developers everything they need to build a design. The example shows a screen with spacing specs, next to a checklist: screens, specs and assets.
A good handoff also covers states that a single screen does not show, such as loading, empty, error and success, and how the layout behaves on other screen sizes.
Handoff is not a one-time event. Talk to developers early, and review the built result together to catch differences.