api-design

Generate OpenAPI specs and TypeScript types from contract-first API designs.

Updated Mar 31, 2026
One-click install
npx skills add https://github.com/Saturate/agents --skill api-design-saturate
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: api-design
Source: https://github.com/Saturate/agents/tree/main/skills/api-design
Command: npx skills add https://github.com/Saturate/agents --skill api-design-saturate

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

Designs APIs with a contract-first, consumer-driven approach to ensure interfaces are intuitive, predictable, and easy to integrate.

Core Features & Use Cases

  • Contract-first API design using OpenAPI/Swagger
  • Consumer-driven validation, consistent error responses, and secure defaults
  • Generate client/server types from API specs to ensure type-safety and alignment

Quick Start

Define an OpenAPI contract for your service and generate TypeScript types from it.

Frequently Asked Questions about api-design

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
What is contract-first API design and how does it work?

Contract-first API design defines your service interface as an OpenAPI specification before writing code, ensuring consumer-driven validation and consistent error responses. It produces robust APIs that are predictable and easy to integrate.

How do I generate TypeScript types from an OpenAPI spec?

Generate TypeScript types from an OpenAPI spec by defining your service contract first. This approach enforces type-safety and alignment between client and server, ensuring the generated types match the API schema exactly.

Does contract-first API design support consumer-driven validation?

Yes, contract-first API design supports consumer-driven validation by strictly enforcing OpenAPI contracts. This ensures interfaces remain intuitive and consistent while validating requests against the defined service schema.

What is the best way to design consistent API error responses?

The best way to design consistent API error responses is using a contract-first approach with OpenAPI. This method enforces secure defaults and consumer-driven validation to produce predictable, standardized error handling across endpoints.

Can I use OpenAPI for endpoint planning and service contracts?

Yes, you can use OpenAPI for endpoint planning and service contracts. It applies contract-first design principles to produce strong, consumer-aligned interfaces and generate types from the defined schemas.

Why should I use contract-first API design over code-first approaches?

Contract-first API design ensures interfaces are intuitive and predictable by generating client and server types from OpenAPI specs. Unlike code-first approaches, it enforces consumer-driven validation and consistent error responses.