Skmtc is a declarative code generation framework. It lets you generate TypeScript code from OpenAPI schemas without complex ASTs.

✨ Features

- 🏎️ Fast - Generates 550k+ tokens per second
- 🧵 Easy to edit code generators - Outputs specified using string templates, not ASTs
- 🥞 Stackable generators - Compose complex functionality by combining generators
- 🗄️ Use your own code conventions - Full control over naming and file structure

🚀 Quick Start

``bash


Run directly with npx

npx skmtc

`

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`bash
npx skmtc generate @skmtc/supabase-backend https://petstore3.swagger.io/api/v3/openapi.json


Generated 9 files (507 lines, 3,383 tokens) in 9ms

npx skmtc generate @skmtc/supabase-react-client https://raw.githubusercontent.com/cloudflare/api-schemas/refs/heads/main/openapi.json


Generated 6,797 files (104,752 lines, 1,635,227 tokens) in 2,969ms


`

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`typescript
import { ZodInsertable } from '@skmtc/gen-zod'

class ZodFetch extends BaseTransformer {
zodName: string;

constructor({context, operation, settings}){
super({context, operation, settings})

// Generate Zod schema for API response and insert it into current file
const response = operation.toSuccessResponse()?.resolve().toSchema()
const zodResponse = this.insert(ZodInsertable, response)

// Grab Zod schema name to use in output code
this.zodName = zodResponse.identifier.name
}

// Define code output
toString(){
return () => {
const res = await fetch('${this.operation.path}')
const data = await res.json()

return ${zodName}.parse(data)
}
}
}
``

📦 Available Generators

Choose from our growing collection of generators, combone them or create your own:

- Tanstack Query - React Query hooks with Zod validation
- MSW - Mock Service Worker handlers from OpenAPI examples
- Zod Schemas - Runtime validation schemas
- TypeScript Types - Pure type definitions
- Supabase/Hono Functions - Edge function handlers
- See full list at https://github.com/skmtc/skmtc-generators

❓ FAQ

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Skmtc supports OpenAPI v3.0. Swagger 2.0 and OpenAPI v3.1 are automatically converted to OpenAPI v3.0.

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Yes! Each Transformer specifies its output using plain string templates, which means you can
edit them as would you edit any other code.

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Yes! Skmtc generates standalone code that integrates with any React application. The generated components work with your existing setup.

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Skmtc is the only code generation framework that provides full control over the generated code. You are not limited by library-specific settings and you do not need to write complex AST code.

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Yes! The generated code is framework-agnostic TypeScript that works with any build tool or library.

🤝 Contributing

We welcome contributions! Check out our Contributing Guide to get started.

🛟 Support

- GitHub Issues - Bug reports and feature requests
- Discord Community - Get help and share your experience

📄 License

Apache 2.0 © Skmtc Contributors

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