@cushin/api-runtime

Runtime utilities for Cushin API codegen - provides type-safe HTTP client and schema helpers that can be used in both browser and Node.js environments.

Features

• 🌐 Browser-compatible - No Node.js dependencies, works in any JavaScript environment
• 🔐 Built-in auth - Token management with automatic refresh
• 📝 Type-safe - Full TypeScript support with Zod schema validation
• 🎯 Lightweight - Minimal bundle size, only depends on ky and zod

Installation

npm install @cushin/api-runtime ky zod

Usage

Define your API configuration

import { defineConfig, defineEndpoint } from "@cushin/api-runtime";
import { z } from "zod";

export const apiConfig = defineConfig({
  baseUrl: "https://api.example.com",
  endpoints: {
    getUser: defineEndpoint({
      path: "/users/:id",
      method: "GET",
      params: z.object({ id: z.string() }),
      response: z.object({
        id: z.string(),
        name: z.string(),
        email: z.string(),
      }),
    }),
  },
});

Create API client

import { createAPIClient } from "@cushin/api-runtime";
import { apiConfig } from "./api-config";

const client = createAPIClient(apiConfig, {
  getTokens: async () => ({
    accessToken: localStorage.getItem("token") || "",
  }),
  onAuthError: () => {
    // Redirect to login
  },
  onRefreshToken: async () => {
    // Refresh your token
  },
});

// Use the client
const user = await client.getUser({ id: "123" });

Key Components

createAPIClient(config, authCallbacks?)

Creates a type-safe API client with automatic token injection and refresh.

defineConfig(config)

Helper function to define your API configuration with type inference.

defineEndpoint(config)

Helper function to define individual endpoints with full type safety.

Why separate from @cushin/api-codegen?

The runtime code needs to be imported by your web application, while the code generation tools (@cushin/api-codegen) contain Node.js-specific code (file system, path manipulation, etc.) that cannot be bundled for the browser.

By separating the runtime into its own package:

• ✅ Your web app can import runtime code without bundling Node.js dependencies
• ✅ Smaller bundle size for your application
• ✅ Clear separation of concerns

Related Packages

• @cushin/api-codegen - CLI tool to generate type-safe API clients
• @cushin/codegen-cli - Shared CLI utilities

License

MIT