Axint turns TypeScript and Python into validated Swift for Apple-native features.

Open-source compiler for App Intents, SwiftUI views, WidgetKit widgets, and full apps.
Compact definitions in, validated Swift out.

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Apple's API surfaces — App Intents, SwiftUI, WidgetKit — are verbose. A single widget needs a TimelineEntry, a TimelineProvider, an EntryView, and a Widget struct before you've written a line of business logic. AI coding agents pay per token, and all that boilerplate adds up fast.

Axint compresses it. One defineIntent() call replaces 50–200 lines of Swift. One defineWidget() replaces an entire WidgetKit stack. The compiler handles the struct conformances, the @Parameter wrappers, the LocalizedStringResource literals — everything an agent would otherwise have to generate token by token.

Four surfaces, one pipeline:

defineIntent()  →  App Intent for Siri & Shortcuts
defineView()    →  SwiftUI view
defineWidget()  →  WidgetKit widget
defineApp()     →  Full app scaffold

The result: teams and AI tools can author Apple-native features in a much smaller surface than hand-written Swift, then validate and ship ordinary generated Swift.

npm install -g @axint/compiler

# compile a single file
axint compile my-intent.ts --out ios/Intents/

# or pipe to stdout
npx @axint/compiler compile my-intent.ts --stdout

import { defineIntent, param } from "@axint/compiler";

export default defineIntent({
  name: "CreateEvent",
  title: "Create Calendar Event",
  description: "Creates a new event in the user's calendar.",
  domain: "productivity",
  params: {
    title: param.string("Event title"),
    date: param.date("Event date"),
    duration: param.duration("Event duration", { default: "1h" }),
    location: param.string("Location", { required: false }),
  },
});

import { defineView, prop, state, view } from "@axint/compiler";

export default defineView({
  name: "EventCard",
  props: {
    title: prop.string(),
    date: prop.date(),
  },
  state: {
    isExpanded: state.boolean(false),
  },
  body: [
    view.vstack({ alignment: "leading", spacing: 8 }, [
      view.text("entry.title"),
      view.conditional("isExpanded", [view.text("entry.date")]),
    ]),
  ],
});

import { defineWidget, entry, view } from "@axint/compiler";

export default defineWidget({
  name: "EventCountdown",
  displayName: "Event Countdown",
  description: "Shows time until the next event.",
  families: ["systemSmall", "systemMedium"],
  entry: {
    eventName: entry.string("Untitled"),
    minutesUntil: entry.int(0),
  },
  body: [
    view.vstack({ alignment: "center", spacing: 4 }, [
      view.text("entry.eventName"),
      view.text("entry.minutesUntil"),
    ]),
  ],
});

import { defineApp, scene, storage } from "@axint/compiler";

export default defineApp({
  name: "WeatherApp",
  scenes: [
    scene.windowGroup("WeatherDashboard"),
    scene.settings("SettingsView", { platform: "macOS" }),
  ],
  appStorage: {
    useCelsius: storage.boolean("use_celsius", true),
    lastCity: storage.string("last_city", "Cupertino"),
  },
});

Compile any surface the same way:

axint compile my-intent.ts --out ios/Intents/
axint compile my-view.ts --out ios/Views/
axint compile my-widget.ts --out ios/Widgets/
axint compile my-app.ts --out ios/App/

Recompiles on every save with 150ms debounce, inline errors, and optional swift build after each successful compile:

axint watch ./intents/ --out ios/Intents/ --emit-info-plist --emit-entitlements
axint watch my-intent.ts --out ios/Intents/ --format --swift-build

Axint ships an MCP server for Claude Desktop, Claude Code, Cursor, Windsurf, and any MCP client.

{
  "mcpServers": {
    "axint": {
      "command": "axint-mcp",
      "args": []
    }
  }
}

10 tools + 3 built-in prompts:

Built-in prompts:

axint.schema.compile is the key optimization — agents send ~20 tokens of JSON and get compiled Swift back directly, skipping TypeScript entirely.

130 diagnostic codes across the validator surface with fix suggestions and color-coded output:

error[AX100]: Intent name "sendMessage" must be PascalCase
  --> src/intents/messaging.ts:5:9
   = help: rename to "SendMessage"

Full reference: docs/ERRORS.md

No install required — axint.ai/#playground runs the same compiler in a server-backed playground, returning Swift live without a local install.

Extensions for Claude Code, Codex, VS Code / Cursor, Windsurf, JetBrains, Neovim, and Xcode.

axint/
├── src/
│   ├── core/        # Parser, validator, generator, compiler, IR
│   ├── sdk/         # defineIntent(), defineView(), defineWidget(), defineApp()
│   ├── mcp/         # MCP server (10 tools + 3 prompts)
│   ├── cli/         # CLI (compile, watch, validate, eject, init, xcode)
│   └── templates/   # 25 bundled reference templates
├── python/          # Python SDK
├── extensions/      # Editor extensions (9 editors)
├── spm-plugin/      # Xcode SPM build plugin
├── tests/           # 543 vitest tests
├── examples/        # Example definitions
└── docs/            # Error reference, assets

Current priorities — full roadmap in ROADMAP.md:

• defineExtension() — app extension compilation
• IntentDialog + richer Apple parameter types
• swift-format integration for generated output

PRs reviewed within 48 hours. Browse good first issue to get started, or see CONTRIBUTING.md.

Apache 2.0, no CLA.

• Node.js 22+
• Any OS (macOS, Linux, Windows)
• Xcode 15+ to ship the generated Swift

Apache 2.0 — fork it, extend it, ship it.