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Handoff 1:11
A 71-second explainer of Handoff, narrated over the same demo you can try yourself.
Try the interactive Handoff demo
What this video covers
Handoff is the point where a design is passed to developers to build - along with the specifications, assets, states and intent they need to build it accurately. A good handoff transfers everything needed to implement the design faithfully and answers the questions developers will have; a poor one leaves gaps that get filled with guesses, so the built product drifts from the design.
Hand over a lone static mock-up and the developer has to guess the spacing, the hover state, the error case - and the build drifts from the design. Hand over specs, every state, tokens and the reasoning, and it gets built as intended. That's handoff: whatever you don't specify, someone else decides. Make it a shared, collaborative process on a common system, not a one-way toss over the wall.