# perry
**Repository Path**: sureman_admin/perry
## Basic Information
- **Project Name**: perry
- **Description**: 一个把ts编译成二进制文件的项目
- **Primary Language**: Rust
- **License**: MIT
- **Default Branch**: main
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 1
- **Forks**: 0
- **Created**: 2026-04-03
- **Last Updated**: 2026-04-27
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
# Perry
**One codebase. Every platform. Native performance.**
Perry is a native TypeScript compiler written in Rust. It takes your TypeScript and compiles it straight to native executables — no Node.js, no Electron, no browser engine. Just fast, small binaries that run anywhere.
**Current Version:** 0.4.14 | [Website](https://perryts.com) | [Documentation](https://perryts.github.io/perry/) | [Showcase](https://perryts.com/showcase)
```bash
perry compile src/main.ts -o myapp
./myapp # that's it — a standalone native binary
```
Perry uses [SWC](https://swc.rs/) for TypeScript parsing and [Cranelift](https://cranelift.dev/) for native code generation. The output is a single binary with no runtime dependencies.
---
## Built with Perry
People are building real apps with Perry today. Here are some highlights:
| Project | What it is | Platforms |
|---------|-----------|-----------|
| [**Bloom Engine**](https://bloomengine.dev) | Native TypeScript game engine — Metal, DirectX 12, Vulkan, OpenGL. Write games in TS, ship native. | macOS, Windows, Linux, iOS, tvOS, Android |
| [**Mango**](https://github.com/MangoQuery/app) | Native MongoDB GUI. ~7 MB binary, <100 MB RAM, sub-second cold start. | macOS, Windows, Linux, iOS, Android |
| [**Hone**](https://hone.codes) | AI-powered native code editor with built-in terminal, Git, and LSP. | macOS, Windows, Linux, iOS, Android, Web |
| [**Pry**](https://github.com/nicktrebes/perry-pry) | Fast, native JSON viewer with tree navigation and search. | macOS, iOS, Android |
| [**dB Meter**](https://dbmeter.app) | Real-time sound level measurement with 60fps updates and per-device calibration. | iOS, macOS, Android |
### Screenshots
**Mango** — Native MongoDB GUI ([source](https://github.com/MangoQuery/app))
**Hone** — AI-powered native code editor ([hone.codes](https://hone.codes))
> Have something you've built with Perry? Open a PR to add it here!
---
## Performance
*Median of 3 runs on macOS ARM64 (Apple Silicon). Node.js v25, Bun 1.3.*
**Perry wins — function calls, recursion, array access:**
| Benchmark | Perry | Node.js | Bun | vs Node | vs Bun | What it tests |
|-----------|-------|---------|-----|---------|--------|---------------|
| fibonacci(40) | 505ms | 1,025ms | 538ms | **2.0x** | **1.1x** | Recursive function calls |
| array_read | 4ms | 14ms | 18ms | **3.5x** | **4.5x** | Sequential memory access (10M elements) |
| object_create | 5ms | 9ms | 7ms | **1.8x** | **1.4x** | Object allocation + field access (1M objects) |
Perry compiles to native machine code — no JIT warmup, no interpreter overhead. Function calls, recursion, and sequential memory access patterns are direct native instructions.
**Competitive — within 2x of JIT runtimes:**
| Benchmark | Perry | Node.js | Bun | vs Node | vs Bun | What it tests |
|-----------|-------|---------|-----|---------|--------|---------------|
| method_calls | 16ms | 11ms | 9ms | 0.7x | 0.6x | Class method dispatch (10M calls) |
| prime_sieve | 11ms | 8ms | 7ms | 0.7x | 0.6x | Sieve of Eratosthenes (boolean array + branches) |
| string_concat | 7ms | 2ms | 1ms | 0.3x | 0.1x | 100K string appends (in-place with capacity) |
Method dispatch uses direct function calls (no vtable). String concatenation uses amortized O(1) in-place appending. V8/JSC have inline caches and rope strings that push these faster.
**V8/Bun lead — f64 math, SIMD-vectorizable loops:**
| Benchmark | Perry | Node.js | Bun | vs Node | vs Bun | Why they're faster |
|-----------|-------|---------|-----|---------|--------|-------------------|
| mandelbrot | 71ms | 25ms | 31ms | 0.3x | 0.4x | V8 TurboFan schedules f64 ops across 2 FPUs more aggressively than Cranelift |
| matrix_multiply | 61ms | 36ms | 36ms | 0.6x | 0.6x | V8 auto-vectorizes nested loops with SIMD (NEON on ARM) |
| math_intensive | 370ms | 52ms | 53ms | 0.1x | 0.1x | Harmonic series: V8 vectorizes `result += 1.0/i` across SIMD lanes |
| nested_loops | 32ms | 18ms | 20ms | 0.6x | 0.6x | V8's loop optimization + SIMD for array access in nested loops |
V8's TurboFan JIT has decades of optimization for tight f64 loops — SIMD auto-vectorization (NEON/SSE), speculative type specialization, and aggressive instruction scheduling. Perry's Cranelift backend generates correct scalar code but doesn't yet vectorize. This is the main performance frontier for Perry's codegen.
Run benchmarks yourself: `cd benchmarks/suite && ./run_benchmarks.sh` (requires node, bun, cargo)
## Binary Size
Perry produces small, self-contained binaries with no external dependencies at run time:
| Program | Binary Size |
|---------|-------------|
| `console.log("Hello, world!")` | **~330KB** |
| hello world + `fs` / `path` / `process` imports | ~380KB |
| full stdlib app (fastify, mysql2, etc.) | ~48MB |
| with `--enable-js-runtime` (V8 embedded) | +~15MB |
Perry automatically detects which parts of the runtime your program uses and only links what's needed.
---
## Installation
### macOS (Homebrew)
```bash
brew install perryts/perry/perry
```
### Windows (winget)
```bash
winget install PerryTS.Perry
```
### Debian / Ubuntu (APT)
```bash
curl -fsSL https://perryts.github.io/perry-apt/perry.gpg.pub | sudo gpg --dearmor -o /usr/share/keyrings/perry.gpg
echo "deb [signed-by=/usr/share/keyrings/perry.gpg] https://perryts.github.io/perry-apt stable main" | sudo tee /etc/apt/sources.list.d/perry.list
sudo apt update && sudo apt install perry
```
### Quick install (macOS / Linux)
```bash
curl -fsSL https://raw.githubusercontent.com/PerryTS/perry/main/packaging/install.sh | sh
```
### From source
```bash
git clone https://github.com/PerryTS/perry.git
cd perry
cargo build --release
# Binary at: target/release/perry
```
### Requirements
Perry requires a C linker to link compiled executables:
- **macOS:** Xcode Command Line Tools (`xcode-select --install`)
- **Linux:** GCC or Clang (`sudo apt install build-essential`)
- **Windows:** MSVC (Visual Studio Build Tools)
Run `perry doctor` to verify your environment.
---
## Quick Start
```bash
# Initialize a new project
perry init my-project
cd my-project
# Compile and run
perry compile src/main.ts -o myapp
./myapp
# Or compile and run in one step
perry run .
# Check TypeScript compatibility
perry check src/
# Diagnose environment
perry doctor
```
---
## Real-World Example: API Server with ESM Modules
Perry supports standard ES module imports and npm packages. Here's a real-world API server with multi-file project structure:
**Project layout:**
```
my-api/
├── package.json
├── src/
│ ├── main.ts
│ ├── config.ts
│ └── routes/
│ └── users.ts
└── node_modules/
```
**src/config.ts**
```typescript
export const config = {
port: 3000,
dbHost: process.env.DB_HOST || 'localhost',
};
```
**src/routes/users.ts**
```typescript
export function getUsers(): object[] {
return [
{ id: 1, name: 'Alice' },
{ id: 2, name: 'Bob' },
];
}
export function getUserById(id: number): object | undefined {
return getUsers().find((u: any) => u.id === id);
}
```
**src/main.ts**
```typescript
import fastify from 'fastify';
import { config } from './config';
import { getUsers, getUserById } from './routes/users';
const app = fastify();
app.get('/api/users', async () => {
return getUsers();
});
app.get('/api/users/:id', async (request) => {
const { id } = request.params as { id: string };
return getUserById(parseInt(id));
});
app.listen({ port: config.port }, () => {
console.log(`Server running on port ${config.port}`);
});
```
**Compile and run:**
```bash
perry compile src/main.ts -o my-api && ./my-api
# or: perry run .
```
The output is a standalone binary — no `node_modules` needed at runtime.
---
## Example Projects
The `example-code/` directory contains ready-to-run projects showing Perry in real-world scenarios:
| Example | Stack | What it demonstrates |
|---------|-------|---------------------|
| **[express-postgres](example-code/express-postgres/)** | Express + PostgreSQL | Multi-file routes, middleware (CORS, Helmet), connection pooling, error handling |
| **[fastify-redis-mysql](example-code/fastify-redis-mysql/)** | Fastify + Redis + MySQL | Rate limiting, caching layer, database queries, dotenv config |
| **[hono-mongodb](example-code/hono-mongodb/)** | Hono + MongoDB | Lightweight HTTP framework with document database |
| **[nestjs-typeorm](example-code/nestjs-typeorm/)** | NestJS + TypeORM | Decorator-based architecture, dependency injection |
| **[nextjs-prisma](example-code/nextjs-prisma/)** | Next.js-style + Prisma | ORM integration, database migrations |
| **[koa-redis](example-code/koa-redis/)** | Koa + Redis | Middleware composition, session storage |
| **[http-server](example-code/http-server/)** | Raw HTTP | Low-level request handling, routing, JSON APIs |
| **[blockchain-demo](example-code/blockchain-demo/)** | Custom | Blockchain implementation in pure TypeScript |
Each example has its own `package.json` and can be compiled with:
```bash
cd example-code/fastify-redis-mysql
npm install
perry compile src/index.ts -o server && ./server
```
---
## Native UI
Perry includes a declarative UI system (`perry/ui`) that compiles directly to native platform widgets — no WebView, no Electron:
```typescript
import { App, VStack, HStack, Text, Button, State } from 'perry/ui';
const count = new State(0);
App(
VStack(
Text('Counter').fontSize(24).bold(),
Text('').bindText(count, n => `Count: ${n}`),
HStack(
Button('Decrement', () => count.set(count.get() - 1)),
Button('Increment', () => count.set(count.get() + 1)),
),
),
{ title: 'My App', width: 400, height: 300 }
);
```
**9 platforms from one codebase:**
| Platform | Backend | Target Flag |
|----------|---------|-------------|
| macOS | AppKit (NSView) | *(default on macOS)* |
| iOS / iPadOS | UIKit | `--target ios` / `--target ios-simulator` |
| tvOS | UIKit | `--target tvos` / `--target tvos-simulator` |
| watchOS | WatchKit | `--target watchos` / `--target watchos-simulator` |
| Android | Android Views (JNI) | `--target android` |
| Windows | Win32 | *(default on Windows)* |
| Linux | GTK4 | *(default on Linux)* |
| Web | DOM (JS codegen) | `--target web` |
| WebAssembly | DOM (WASM) | `--target wasm` |
**127+ UI functions** — widgets (Button, Text, TextField, Toggle, Slider, Picker, Table, Canvas, Image, ProgressView, SecureField, NavigationStack, ZStack, LazyVStack, Form/Section, CameraView), layouts (VStack, HStack), and system APIs (keychain, notifications, file dialogs, clipboard, dark mode, openURL, audio capture).
---
## Multi-Threading
The `perry/thread` module provides real OS threads with compile-time safety — no shared mutable state, no data races:
```typescript
import { parallelMap, parallelFilter, spawn } from 'perry/thread';
// Data-parallel array processing across all CPU cores
const results = parallelMap([1, 2, 3, 4, 5], n => fibonacci(n));
// Parallel filtering
const evens = parallelFilter(numbers, n => n % 2 === 0);
// Background thread with Promise
const result = await spawn(() => expensiveComputation());
```
Values cross threads via deep-copy. Each thread gets its own arena and GC. The compiler enforces that closures don't capture mutable state.
---
## Internationalization (i18n)
Compile-time localization with zero runtime overhead:
```typescript
import { t, Currency, ShortDate } from 'perry/i18n';
console.log(t('hello')); // "Hallo" (German locale)
console.log(t('items', { count: 3 })); // "3 Artikel" (CLDR plural rules)
console.log(Currency(9.99, 'EUR')); // "9,99 €"
console.log(ShortDate(Date.now())); // "24.03.2026"
```
Configure in `perry.toml`:
```toml
[i18n]
default_locale = "en"
locales = ["en", "de", "fr", "ja"]
```
All locale strings are baked into the binary at compile time. Native locale detection on all 6 platforms. CLDR plural rules for 30+ locales.
---
## Home Screen Widgets (WidgetKit)
Build native home screen widgets from TypeScript — iOS, Android, watchOS, and Wear OS:
```bash
perry compile src/widget.ts --target ios-widget -o MyWidget
perry compile src/widget.ts --target android-widget -o MyWidget
perry compile src/widget.ts --target watchos-widget -o MyWidget
perry compile src/widget.ts --target wearos-tile -o MyWidget
```
---
## Cross-Platform Targets
```bash
# Desktop (default for host platform)
perry compile src/main.ts -o myapp
# Mobile
perry compile src/main.ts --target ios -o MyApp
perry compile src/main.ts --target ios-simulator -o MyApp
perry compile src/main.ts --target android -o MyApp
# TV / Watch
perry compile src/main.ts --target tvos -o MyApp
perry compile src/main.ts --target watchos -o MyApp
# Web
perry compile src/main.ts --target web -o app.html # JavaScript output
perry compile src/main.ts --target wasm -o app.wasm # WebAssembly output
# Home screen widgets
perry compile src/widget.ts --target ios-widget -o MyWidget
perry compile src/widget.ts --target android-widget -o MyWidget
perry compile src/widget.ts --target wearos-tile -o MyWidget
```
---
## Publishing
```bash
perry publish macos # or: ios / android / linux
```
`perry publish` sends your TypeScript source to perry-hub (the cloud build server), which cross-compiles and signs for each target platform.
---
## Supported Language Features
### Core TypeScript
| Feature | Status |
|---------|--------|
| Variables (let, const, var) | ✅ |
| All operators (+, -, *, /, %, **, &, \|, ^, <<, >>, ???, ?., ternary) | ✅ |
| Control flow (if/else, for, while, switch, break, continue) | ✅ |
| Try-catch-finally, throw | ✅ |
| Functions, arrow functions, rest params, defaults | ✅ |
| Closures with mutable captures | ✅ |
| Classes (inheritance, private fields #, static, getters/setters, super) | ✅ |
| Generics (monomorphized at compile time) | ✅ |
| Interfaces, type aliases, union types, type guards | ✅ |
| Async/await, Promise | ✅ |
| Generators (function*) | ✅ |
| ES modules (import/export, re-exports, `import * as`) | ✅ |
| Destructuring (array, object, rest, defaults, rename) | ✅ |
| Spread operator in calls and literals | ✅ |
| RegExp (test, match, replace) | ✅ |
| BigInt (256-bit) | ✅ |
| Decorators | ✅ |
### Standard Library
| Module | Functions |
|--------|-----------|
| `console` | log, error, warn, debug |
| `fs` | readFileSync, writeFileSync, existsSync, mkdirSync, unlinkSync, readdirSync, statSync, readFileBuffer, rmRecursive |
| `path` | join, dirname, basename, extname, resolve |
| `process` | env, exit, cwd, argv, uptime, memoryUsage |
| `JSON` | parse, stringify |
| `Math` | floor, ceil, round, abs, sqrt, pow, min, max, random, log, sin, cos, tan, PI |
| `Date` | Date.now(), new Date(), toISOString(), component getters |
| `crypto` | randomBytes, randomUUID, sha256, md5 |
| `os` | platform, arch, hostname, homedir, tmpdir, totalmem, freemem, uptime, type, release |
| `Buffer` | from, alloc, allocUnsafe, byteLength, isBuffer, concat; instance methods |
| `child_process` | execSync, spawnSync, spawnBackground, getProcessStatus, killProcess |
| `Map` | get, set, has, delete, size, clear, forEach, keys, values, entries |
| `Set` | add, has, delete, size, clear, forEach |
| `setTimeout/clearTimeout` | ✅ |
| `setInterval/clearInterval` | ✅ |
| `worker_threads` | parentPort, workerData |
### Native npm Package Implementations
These packages are natively implemented in Rust — no Node.js required:
| Category | Packages |
|----------|----------|
| **HTTP** | fastify, axios, node-fetch, ws (WebSocket) |
| **Database** | mysql2, pg, ioredis |
| **Security** | bcrypt, argon2, jsonwebtoken |
| **Utilities** | dotenv, uuid, nodemailer, zlib, node-cron |
---
## Compiling npm Packages Natively
Perry can compile pure TypeScript/JavaScript npm packages directly to native code instead of routing them through the V8 runtime. Add a `perry.compilePackages` array to your `package.json`:
```json
{
"perry": {
"compilePackages": [
"@noble/curves",
"@noble/hashes",
"superstruct"
]
}
}
```
Then compile with `--enable-js-runtime` as usual. Packages in the list are compiled natively; all others use the V8 runtime.
**Good candidates:** Pure math/crypto libraries, serialization/encoding, data structures with no I/O.
**Keep as V8-interpreted:** Packages using HTTP/WebSocket, native addons, or unsupported Node.js builtins.
---
## Compiler Optimizations
- **NaN-Boxing** — all values are 64-bit words (f64/u64); no boxing overhead for numbers
- **Mark-Sweep GC** — conservative stack scan, arena block walking, 8-byte GcHeader per alloc
- **Parallel Compilation** — rayon-based module codegen, transform passes, and symbol scanning across CPU cores
- **FMA / CSE / Loop Unrolling** — fused multiply-add, common subexpression elimination, 8x loop unroll
- **i32 Loop Counters** — integer registers for loop variables (no f64 round-trips)
- **LICM** — loop-invariant code motion for nested loops
- **Shape-Cached Objects** — 5-6x faster object allocation
- **TimSort** — O(n log n) hybrid sort for `Array.sort()`
- **`__platform__` Constant** — compile-time platform elimination (dead code removal per target)
---
## Plugin System
Compile TypeScript as a native shared library plugin:
```bash
perry compile my-plugin.ts --output-type dylib -o my-plugin.dylib
```
```typescript
import { PluginRegistry } from 'perry/plugin';
export function activate(api: any) {
api.registerTool('my-tool', (args: any) => { /* ... */ });
api.on('event', (data: any) => { /* ... */ });
}
```
---
## Testing (Geisterhand)
Perry includes Geisterhand, an in-process UI testing framework with HTTP-driven interaction and screenshot capture:
```bash
perry compile src/main.ts --enable-geisterhand -o myapp
./myapp
# UI test server runs on http://localhost:7676
```
Supports screenshot capture on all native platforms. See the [Geisterhand docs](https://perryts.github.io/perry/testing/geisterhand.html) for details.
---
## Ecosystem
| Package | Description |
|---------|-------------|
| [**Bloom Engine**](https://bloomengine.dev) | Native TypeScript game engine — 2D/3D rendering, skeletal animation, spatial audio, physics. Metal/DirectX 12/Vulkan/OpenGL. |
| [perry-react](https://github.com/PerryTS/react) | React/JSX that compiles to native widgets. Standard React components → native macOS/iOS/Android app. |
| [perry-sqlite](https://github.com/PerryTS/sqlite) | SQLite with a Prisma-compatible API (`findMany`, `create`, `upsert`, `$transaction`, etc.) |
| [perry-postgres](https://github.com/PerryTS/postgres) | PostgreSQL with the same Prisma-compatible API |
| [perry-prisma](https://github.com/PerryTS/prisma) | MySQL with the same Prisma-compatible API |
| [perry-apn](https://github.com/PerryTS/push) | Apple Push Notifications (APNs) native library |
| [@perry/threads](https://github.com/PerryTS/perry/tree/main/packages/perry-threads) | Web Worker parallelism (`parallelMap`, `parallelFilter`, `spawn`) for browser/Node.js |
| [perry-starter](https://github.com/PerryTS/starter) | Minimal starter project — get up and running in 30 seconds |
| [perry-demo](https://demo.perryts.com) | Live benchmark dashboard comparing Perry vs Node.js vs Bun |
| [perry-react-dom](https://github.com/PerryTS/react-dom) | Perry React DOM bridge |
### perry-react
Write React components that compile to native widgets — no DOM, no browser:
```tsx
import { useState } from 'react';
import { createRoot } from 'react-dom/client';
function Counter() {
const [n, setN] = useState(0);
return (
Count: {n}
setN(n + 1)}>+
);
}
createRoot(null, { title: 'Counter', width: 300, height: 200 }).render( );
```
### perry-sqlite / perry-postgres / perry-prisma
Drop-in replacements for `@prisma/client` backed by Rust (sqlx):
```typescript
import { PrismaClient } from 'perry-sqlite';
const prisma = new PrismaClient();
await prisma.$connect();
const users = await prisma.user.findMany({
where: { email: { contains: '@example.com' } },
orderBy: { createdAt: 'desc' },
take: 20,
});
await prisma.$disconnect();
```
---
## Commands
| Command | What it does |
|---------|-------------|
| `perry compile -o ` | Compile TypeScript to a native binary |
| `perry run [platform]` | Compile and run in one step (supports `ios`, `android`, etc.) |
| `perry init ` | Scaffold a new project |
| `perry check ` | Validate TypeScript compatibility without compiling |
| `perry publish ` | Build, sign, and publish via the cloud build server |
| `perry doctor` | Check your development environment |
| `perry i18n extract` | Extract translatable strings from source |
### Compiler flags
```
-o, --output Output file name
--target ios | ios-simulator | tvos | tvos-simulator |
watchos | watchos-simulator | android |
web | wasm | ios-widget | android-widget |
wearos-tile | watchos-widget
--output-type executable | dylib
--enable-js-runtime Embed V8 for npm package compatibility (+~15MB)
--enable-geisterhand Enable UI testing server
--print-hir Print HIR for debugging
```
---
## Project Structure
```
perry/
├── crates/
│ ├── perry/ # CLI (compile, run, check, init, doctor, publish)
│ ├── perry-parser/ # SWC TypeScript parser
│ ├── perry-types/ # Type system
│ ├── perry-hir/ # HIR data structures and AST→HIR lowering
│ ├── perry-transform/ # IR passes (closure conversion, async, inlining)
│ ├── perry-codegen/ # Cranelift native codegen
│ ├── perry-codegen-js/ # JavaScript codegen (--target web)
│ ├── perry-codegen-wasm/ # WebAssembly codegen (--target wasm)
│ ├── perry-codegen-swiftui/ # SwiftUI codegen (iOS/watchOS widgets)
│ ├── perry-codegen-glance/ # Android Glance widget codegen
│ ├── perry-codegen-wear-tiles/ # Wear OS Tiles codegen
│ ├── perry-runtime/ # Runtime (NaN-boxing, GC, arena, strings)
│ ├── perry-stdlib/ # Node.js API support (fastify, mysql2, redis, etc.)
│ ├── perry-ui-*/ # Native UI (macOS, iOS, tvOS, watchOS, Android, GTK4, Windows)
│ ├── perry-ui-geisterhand/ # UI testing framework
│ ├── perry-jsruntime/ # Optional V8 interop via QuickJS
│ └── perry-diagnostics/ # Error reporting
├── docs/ # Documentation site (mdBook)
├── example-code/ # 8 example applications
├── benchmarks/ # Benchmark suite (Perry vs Node.js vs Bun)
├── packages/ # npm packages (@perry/threads)
└── test-files/ # Test suite
```
---
## Runtime Characteristics
- **Garbage Collection** — mark-sweep GC with conservative stack scanning, arena block walking, 8-byte GcHeader per allocation
- **Single-Threaded by Default** — async I/O on Tokio workers, callbacks on main thread. Use `perry/thread` for explicit multi-threading.
- **No Runtime Type Checking** — types erased at compile time. Use `typeof` and `instanceof` for runtime checks.
- **Small Binaries** — ~330KB hello world, ~48MB with full stdlib. Automatically stripped.
---
## Development
```bash
cargo build --release # Build everything
cargo build --release -p perry-runtime -p perry-stdlib # Rebuild runtime (after changes)
cargo test --workspace --exclude perry-ui-ios # Run tests
cargo run --release -- compile file.ts -o out && ./out # Compile and run
cargo run --release -- compile file.ts --print-hir # Debug HIR
```
### Adding a new feature
1. **HIR** — add node type to `crates/perry-hir/src/ir.rs`
2. **Lowering** — handle AST→HIR in `crates/perry-hir/src/lower.rs`
3. **Codegen** — generate Cranelift IR in `crates/perry-codegen/src/codegen.rs`
4. **Runtime** — add runtime functions in `crates/perry-runtime/` if needed
5. **Test** — add `test-files/test_feature.ts`
---
## License
MIT