axint

 

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.

Website · Playground · Quick Start · MCP Server · Docs · Registry

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Why Axint

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.

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Quick start

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

Intent

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 }),
  },
});

View

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")]),
    ]),
  ],
});

Widget

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"),
    ]),
  ],
});

App

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/

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Public truth

v0.3.9 · 11 MCP tools + 3 prompts · 160 diagnostic codes · 967 tests · 8 live packages · 26 bundled templates Public proof is generated from `../public-truth/public-truth.json` via `npm --prefix .. run truth:sync`.

If release numbers, diagnostics, package counts, or MCP surfaces change, update the canonical truth layer and re-run the sync instead of editing proof values by hand.

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Watch mode

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

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MCP server

Axint ships an MCP server for Claude Desktop, Claude Code, Cursor, Codex, VS Code, Windsurf, Xcode, and any MCP client. ```json

{ "mcpServers": { "axint": { "command": "npx", "args": [ "-y", "@axint/compiler", "axint-mcp" ] } } }

MCP tools and built-in prompts:

| Tool | What it does |
| --- | --- |
| `axint.compile` | Full pipeline: TypeScript → Swift + plist + entitlements |
| `axint.schema.compile` | Minimal JSON → Swift (token-saving mode for agents) |
| `axint.validate` | Dry-run validation with diagnostics |
| `axint.feature` | Generate a complete feature package from a description |
| `axint.suggest` | Suggest Apple-native features for a domain |
| `axint.scaffold` | Generate a starter TypeScript intent from a description |
| `axint.swift.validate` | Validate existing Swift against build-time rules |
| `axint.swift.fix` | Auto-fix mechanical Swift errors (concurrency, Live Activities) |
| `axint.fix-packet` | Read the latest AI-ready repair packet from a local compile or watch run |
| `axint.templates.list` | List bundled reference templates |
| `axint.templates.get` | Return the source of a specific template |

Built-in prompts:

| Prompt | What it does |
| --- | --- |
| `axint.quick-start` | Get a quick-start guide |
| `axint.create-intent` | Start a new intent from guided parameters |
| `axint.create-widget` | Start a new widget from guided parameters |

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

<!-- truth:readme-discovery-links:start -->Need a working repo instead of a raw snippet? Browse **[axint-examples](https://github.com/agenticempire/axint-examples)**. Still seeing older package names like `@axintai/compiler`? Use the current package identity: `@axint/compiler`.<!-- truth:readme-discovery-links:end -->

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## Diagnostics

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

| Range | Domain |
| --- | --- |
| `AX000`–`AX023` | Compiler / Parser |
| `AX100`–`AX113` | Intent |
| `AX200`–`AX202` | Swift output |
| `AX300`–`AX322` | View |
| `AX400`–`AX422` | Widget |
| `AX500`–`AX522` | App |
| `AX700`–`AX749` | Swift build rules |
| `AX720`–`AX735` | Swift 6 concurrency |
| `AX740`–`AX749` | Live Activities |

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

Full reference: [`docs/ERRORS.md`](docs/ERRORS.md)

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## Type mappings

| TypeScript | Swift | Default value |
| --- | --- | --- |
| `string` | `String` | ✓ |
| `int` | `Int` | ✓ |
| `double` | `Double` | ✓ |
| `float` | `Float` | ✓ |
| `boolean` | `Bool` | ✓ |
| `date` | `Date` | — |
| `duration` | `Measurement<UnitDuration>` | ✓ (`"1h"`) |
| `url` | `URL` | — |
| `optional<T>` | `T?` | ✓ |

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## Playground

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

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## Editor extensions

Extensions for [Claude Code](extensions/claude-code), [Claude Desktop](extensions/claude-desktop), [Codex](extensions/codex), [VS Code / Cursor](extensions/vscode), [Windsurf](extensions/windsurf), [JetBrains](extensions/jetbrains), [Neovim](extensions/neovim), and [Xcode](extensions/xcode).

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## Project structure

axint/ ├── src/ │ ├── core/ # Parser, validator, generator, compiler, IR │ ├── sdk/ # defineIntent(), defineView(), defineWidget(), defineApp() │ ├── mcp/ # MCP server and prompt surface │ ├── cli/ # CLI (compile, watch, validate, eject, init, xcode) │ └── templates/ # Bundled reference templates ├── python/ # Python SDK ├── extensions/ # Editor extensions (9 editors) ├── spm-plugin/ # Xcode SPM build plugin ├── tests/ # Compiler, CLI, SDK, MCP, and Python coverage ├── examples/ # Example definitions └── docs/ # Error reference, assets

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## What's next

Current priorities — full roadmap in [`ROADMAP.md`](ROADMAP.md):

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

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## Contributing

PRs reviewed within 48 hours. Browse [`good first issue`](https://github.com/agenticempire/axint/issues?q=is%3Aissue+label%3A%22good+first+issue%22) to get started, or see [`CONTRIBUTING.md`](CONTRIBUTING.md).

Apache 2.0, no CLA.

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## Requirements

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

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## License

[Apache 2.0](LICENSE) — fork it, extend it, ship it.

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