# Code inside the design file: what code layers mean for handoff

- Link: https://s9studio.com/insights/code-layers-handoff/
- Published: 2026-10-17T09:00:00+01:00
- Author: sumitkafre

At Config 2026 in June, Figma introduced code layers, which turn a design layer 
into interactive code with a click or a prompt. At Config India on 15 October, code
layers and Specs moved into open beta. For teams that have spent years translating
static screens into working interfaces, this is a meaningful change in the tools.
It does not remove the need for engineering, but it changes where some conversations
happen and how much is left to interpretation.

## The gap static designs leave

Static mockups are good at showing layout and visual style. They are poor at showing
behaviour: what happens when a list is empty, when a name is very long, when the
screen is narrow, when data is loading or when an action fails.

Those details are usually discovered during the build, when changing them is more
expensive. Engineers fill gaps with their best guess, designers review later, and
the cycle repeats.

## What code layers change

Code layers let designers prototype interactive states, real data and responsive
behaviour with the same material that will eventually ship. A component can be reviewed
as it will behave, not only as it will look.

This shortens feedback loops. Questions about edge cases surface during design, 
when they are cheap to answer, rather than during development.

> A convincing prototype is not the same as finished software.

## What they do not replace

Code in a design file is not production code. Performance, accessibility, security,
data handling, testing and long-term maintenance still belong in the codebase, reviewed
by engineers.

The main risk is treating a convincing prototype as finished software. Clear agreements
about what is reference material and what is intended for reuse help avoid that 
confusion.

## The design system is still the bridge

Handoff works best when design and code share a vocabulary. Named tokens for colour,
type and spacing, and components that exist in both the design file and the codebase,
remain the bridge between the two.

Code layers are most powerful when they use those shared components. Then a prototype
is not a one-off, but a combination of pieces that engineering already recognises.

## How roles shift

Designers who are comfortable with basic code will be able to explore interactions
more independently. Engineers can spend less time interpreting static screens and
more on the hard problems underneath.

Collaboration still matters most. The best results come when designers and engineers
review interactive prototypes together, early, and agree on what needs to be built
properly.

## Where it helps most

Consider a filterable data table. In static frames, a designer would need dozens
of screens to show sorting, filtering, empty results, long values and loading states.
An interactive code layer can show all of that in one prototype that reviewers can
actually use.

Complex forms are another good fit, especially those with conditional fields and
validation messages that are hard to describe in static frames.

## Keeping it organised

As more code appears in design files, teams need simple rules: where prototypes 
live, how they are named, which ones are current and who maintains them. Without
this, files fill up with outdated experiments that confuse everyone.

## How to adopt it

Start small. Use code layers for interactions that are hardest to describe in static
frames, such as complex forms, data-heavy views or responsive navigation. Agree 
with engineering which outputs are reference and which are reusable. Keep the design
system as the single source of truth, and expand use as the team learns.

## Before you adopt it

 * Use code layers for interactions that are hard to describe.
 * Agree what is reference and what is reusable.
 * Build prototypes from shared design-system components.
 * Review interactive prototypes with engineers early.