Membrane

Prototype in code that can’t leave your design system.

A voice-first layer between your design system and your team. A designer talks; it builds in real code that can only use your components and tokens. Engineers get a runnable handoff with the design-system and backend contracts already checked.

The handoff is where design goes to die.

Friction between design mocks and engineering reality is the silent killer of product speed. Every pixel-perfect Figma file is a promise that usually breaks when it hits the implementation wall.

Design system erosion starts the moment a component is recreated from scratch. When backend contracts don’t match frontend expectations, teams waste weeks on “integration debt” that shouldn’t exist.

One layer. Correct by construction.

Technical architectural precision at every step of the workflow.

Membrane system architecture A designer talks to the generator, which builds through two membranes against the design system and the backend. A handoff critic runs only at handoff, and the approved prototype goes to the software developer who owns the backend. Membrane Designer (voice in) Generator (LLM + coder) membrane design Design system (core + exp.) membrane dev Backend (schema + mocks) Handoff critic (runs only at handoff) approved Software dev (owns backend)
Figure 01: System architecture Two membranes: one keeps the prototype inside your design system, one checks it against your backend contract. No live database, ever.

Why this is possible now.

AI code quality

Large Language Models have finally crossed the threshold for generating structured, type-safe React and Tailwind code that follows strict linting rules.

Mature design systems

Organizations have spent years codifying their brands into tokens. We leverage these primitives as the “laws of physics” for our generator.

‘Correct’ code demand

Generic AI output is noise. Engineering leaders now prioritize correctness and design-system adherence over pure generation volume.

Built for teams with a design system.

Fast-moving product teams protecting their handoff process. If you have a Figma library and a React component library, Membrane is the bridge that ensures they never drift apart. We help you move at the speed of conversation without compromising the integrity of your code base.

Scaleups Fintech SaaS Platforms Core UI Teams

See it first.

We are currently onboarding a select group of design-led engineering teams for early access.