Skip to content

<altitude>

Altitude — our design system, and our AI laboratory

Altitude is Southleft’s in-house design system: a complete Figma-to-production ecosystem we use as the testbed for every AI integration and workflow experiment we run. It powers Story UI, FigmaLint demos, and our MCP research — and it can be the foundation your system starts from.

Schedule a demo Read the announcement

<whats-inside>

From Figma to final deployment

A complete ecosystem for design and development — every element aligned, from token to component to framework wrapper.

Figma-first

The system starts in Figma — components, color, and typography structured for real handoff, with tokens managed at the source.

Tokens via Style Dictionary

JSON design tokens compile automatically into styling formats for any framework. One source of truth, many outputs.

Native web components, powered by Lit

Fast, lightweight, framework-agnostic — your UI isn’t married to this year’s framework.

Wrappers for React, Svelte, and Angular

Prove-it integrations that let each team consume the same system in their own stack.

Built to scale

The architecture grows with your product without trading away performance or stability.

<why-not-zero>

Why start from Altitude instead of from scratch?

Every pattern in Altitude has been exercised by real client work and real AI tooling. When we bootstrap your system from it, you skip six months of foundational decisions — token architecture, component API design, framework strategy — and start where we already landed.

40% faster from design to code — how Big Medium got a token-compliant web component system with prompt-based layout generation.
Read the full Big Medium story →

<the-testbed>

Structured the way AI needs

Altitude is the system behind our demos for a reason. If you want to see what an AI-ready design system feels like, this is the demo. 

$ npx story-ui init
✓ altitude design system detected
✓ tokens parsed · components indexed
› “hero, three feature cards, closing cta”
agent composing from altitude… done
— fully token-compliant. zero rogue divs.

<cta>

See Altitude up close

Schedule a demo and bring your hardest workflow question.

Start a conversation Explore all our tools