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Code Generator Design - Spec-to-Handler Codegen

Generate type-safe API handler stubs and test fixtures from OpenAPI and AsyncAPI specifications.

115|8|Updated Mar 30, 2025
Search Tags:#type safety#openapi#code generation#api development#asyncapi#test fixtures#handler stubs
One-click install
npx skills add https://github.com/Goldziher/spikard --skill code-generator-design-spec-to-handler-codegen
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: Code Generator Design - Spec-to-Handler Codegen
Source: https://github.com/Goldziher/spikard/tree/main/.ai-rulez/skills/code-generator-design
Command: npx skills add https://github.com/Goldziher/spikard --skill code-generator-design-spec-to-handler-codegen

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill includes references (resource) components.

What problem does it solve?

This Skill automates the creation of API handler code from specifications, eliminating boilerplate and ensuring contract-first development.

Core Features & Use Cases

  • Multi-Spec Support: Generates code from OpenAPI, AsyncAPI, and JSON Schema.
  • Multi-Language Output: Supports Python, TypeScript, Ruby, and more.
  • Test Fixture Generation: Creates comprehensive test cases based on specifications.
  • Use Case: Quickly scaffold a new microservice by defining your API in OpenAPI, then use this Skill to generate all the necessary handler stubs and validation logic in your chosen language.

Quick Start

Use the code generator skill to create Python handler stubs from the attached file 'api.yaml'.

Frequently Asked Questions about Code Generator Design - Spec-to-Handler Codegen

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

FAQPage Schema
How do I generate type-safe API handlers from an OpenAPI spec?▼

To generate type-safe API handlers from an OpenAPI spec, use this Skill to automate schema parsing and type extraction, producing validated handler stubs and test fixtures in your chosen language.

Can I generate code from AsyncAPI specifications for multiple languages?▼

Yes, you can generate code from AsyncAPI specifications, with multi-language output supporting Python, TypeScript, and Ruby to facilitate contract-first development workflows.

What is contract-first API development and how does code generation help?▼

Contract-first API development defines your API specification before writing application logic. Code generation helps by automating boilerplate creation, ensuring handlers match the schema and validation rules.

Does code generation from API specs also create test fixtures?▼

Yes, code generation from API specs creates comprehensive test fixtures alongside type-safe handler stubs, ensuring your validation logic and schema parsing are immediately testable.

What is the best way to scaffold a microservice using an OpenAPI definition?▼

The best way to scaffold a microservice from an OpenAPI definition is using automated code generation to instantly create all necessary handler stubs and validation logic in your target language.

Why does contract-first development require schema parsing and type extraction?▼

Contract-first development requires schema parsing and type extraction to translate API specifications into type-safe code, ensuring generated handler stubs enforce strict validation rules automatically.

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