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openapi-spec-generation

Generate and validate OpenAPI 3.1 specifications from code and design inputs.

Updated Mar 12, 2026
Search Tags:#openapi#validation#code-first#api-documentation#api-spec#design-first#sdk-generation
One-click install
npx skills add https://github.com/GP-CRM-System/E-Commerce-CRM --skill openapi-spec-generation-gp-crm-system
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: openapi-spec-generation
Source: https://github.com/GP-CRM-System/E-Commerce-CRM/tree/main/.agents/skills/openapi-spec-generation
Command: npx skills add https://github.com/GP-CRM-System/E-Commerce-CRM --skill openapi-spec-generation-gp-crm-system

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

OpenAPI 3.1 specifications are essential for API documentation, client SDK generation, and contract validation, but creating and maintaining accurate specs across code-first, design-first, and hybrid approaches can be tedious and error-prone.

Core Features & Use Cases

  • Design-first: generate specs from API contracts and design documents.
  • Code-first: derive specs directly from source code and keep them in sync with implementations.
  • Validation patterns: ensure API contracts match implementations and enable smooth SDK generation.

Quick Start

Generate an OpenAPI 3.1 specification from your project artifacts with a single command.

Frequently Asked Questions about openapi-spec-generation

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

FAQPage Schema
How do I generate OpenAPI 3.1 specifications from existing source code?▼

To generate OpenAPI 3.1 specifications from source code, use a code-first approach that derives specs directly from your implementations and keeps them synchronized with your project artifacts.

What's the best way to validate API contracts against my implementations?▼

Validating API contracts against implementations requires validation patterns that ensure your specs match the source code, enabling smooth SDK generation and maintaining contract compliance across your project.

Can I generate OpenAPI specs from design-first inputs instead of code?▼

Yes, you can generate OpenAPI specs from design-first inputs by deriving specifications directly from API contracts and design documents before writing any implementation code.

How does keeping OpenAPI specs in sync with implementations improve SDK generation?▼

Keeping OpenAPI specs in sync with implementations ensures your API documentation and contracts match the source code, which enables smooth, accurate client SDK generation and reduces integration errors.

Do I need templates and tooling to produce accurate OpenAPI specifications?▼

Yes, generating accurate, versioned OpenAPI specifications requires templates and tooling to align the specs with your implementations and ensure proper validation across different development approaches.

Why does my OpenAPI documentation keep getting out of sync with my code?▼

OpenAPI documentation gets out of sync when specs are maintained separately from code; using a code-first approach to derive specs directly from source code keeps them aligned with implementations.

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