document.json

{
  "context": { "surface": "string" },
  "root": {
    "type": "Headline",
    "properties": {
      "text": {
        "$expr": "concat('Documents become ', context.surface)"
      }
    }
  }
}

// resolved on SwiftUI and Compose, identically

Documents become native UI.

Milano is a client-only, design-system-agnostic Document-Driven UI framework for SwiftUI and Compose. A JSON document describes structure and behavior; your components draw every pixel. Validated at one gate, rendered identically on both platforms.

"type": "Playground"

Try it in the browser

Author a vocabulary and a document, watch the gate accept or reject it, and interact with the live result. Nothing to install.

Open the playground →

"type": "SDK"

Ship it in your app

The SwiftUI and Compose engines, getting-started guides, sample apps, and the bridge to your design system.

Read the SDK docs →

"type": "Specification"

Read the contract

The normative specs: document model, expression language, state and actions, and the conformance suite both engines pass.

Read the specs →