Engineering handoff, tokens and types crossing the boundary, not Figma annotations and hope.
The design-to-engineering boundary is where most products lose fidelity. Spacing inconsistent, animations missing, edge states undefined, dark mode 'we'll do later'. We design for handoff from the start, tokens that ship, Storybook stories alongside Figma frames, and a typed contract the engineer can build against without guessing.
What we build
Tokens that ship to the codebase, not annotations
Color, spacing, type, radius, motion, all tokenised in Tokens Studio and exported to the Tailwind config. Engineers read tokens, not pixel values. A token change in Figma ships to production in the same PR.
Storybook as the engineering source of truth
Every component lands in Storybook with its variants matrix, ARIA notes, and example data. Engineers reference Storybook, not Figma, when building. Figma defines the spec; Storybook proves it.
Edge states as a deliverable, not a TODO
Loading, empty, error, partial, offline, designed before the happy path is final. The engineer doesn't have to invent the spinner state at 11pm; it's already in the file.
Typed contracts for component props
Props match the TypeScript shape one-to-one. Optional vs required, enum vs free string, default values, all explicit in the design spec. Engineers don't ask 'what should this default to'.
Motion specified, not described
Duration, easing curve, and trigger spec live in the component's documentation. The engineer implements against named tokens (`ease-out-quart`, `duration-fast`), not 'snappy' or 'springy'.
Review loops in Figma + Storybook
Design reviews happen in Figma; implementation reviews happen in Storybook. The two surfaces are the contract; nothing gets to production without going through both.
Where this fits
Your designers ship beautiful Figma files and engineering builds something that almost matches, every release.
Your design system is a Figma library and a Tailwind config that drift apart over time.
Your product has hover states and loading states that look invented at build-time, not designed.
Tech stack
- Figma
- Storybook
- Design Tokens
- TypeScript Types
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