contract-kit

Core meta package for Contract Kit - the contract-first TypeScript framework for building type-safe APIs and typed clients.

What's Included

This package re-exports the core Contract Kit framework:

• @contract-kit/core - Contract definitions and builders
• @contract-kit/client - HTTP client for contract-based requests
• @contract-kit/application - Use case factory (commands and queries)
• @contract-kit/domain - Domain modeling helpers (value objects, entities, domain events)
• @contract-kit/errors - Error catalog and handling utilities
• @contract-kit/config - Environment-first configuration layer
• @contract-kit/ports - Port definitions and provider system
• @contract-kit/openapi - OpenAPI 3.1 generation from contracts

What's NOT Included

This package intentionally excludes:

• React integrations - @contract-kit/react, @contract-kit/react-query, @contract-kit/react-hook-form
• Server adapters - @contract-kit/next, @contract-kit/server
• Provider implementations - @contract-kit/provider-* packages

These can be installed separately as needed.

Installation

npm install contract-kit
npm install zod  # or valibot, arktype, etc.

Quick Start

import { createContractGroup, createClient } from "contract-kit";
import { z } from "zod";

// Define a contract
const todos = createContractGroup().namespace("todos");

export const getTodo = todos
  .get("/api/todos/:id")
  .path(z.object({ id: z.string() }))
  .response(200, z.object({
    id: z.string(),
    title: z.string(),
    completed: z.boolean(),
  }));

// Create a typed client
const client = createClient({
  baseUrl: "https://api.example.com",
});

// Make type-safe requests
const result = await client.call(getTodo, {
  path: { id: "123" },
});

Optional Add-ons

Server Adapters

npm install @contract-kit/next next
npm install @contract-kit/server

React Integrations

npm install @contract-kit/react-query @tanstack/react-query
npm install @contract-kit/react-hook-form react-hook-form @hookform/resolvers
npm install @contract-kit/react

Providers

npm install @contract-kit/provider-logger-pino pino
npm install @contract-kit/provider-redis ioredis
npm install @contract-kit/provider-mail-resend resend
# ... and more

Documentation

For complete documentation, visit: https://github.com/taylorbryant/contract-kit

License

MIT