A plugin for the Fastify webserver to autogenerate a Fastify configuration based on a OpenApi(v2/v3) specification.

openapi_first is a Ruby gem for request / response validation and contract-testing against an OpenAPI API description. It makes APIFirst easy and reliable.

Design first Open Source Data Management Toolkit

DJHQ smarty pants

A comprehensive documentation repository covering the OpenAPI Specification (OAS) and Swagger ecosystem, including API design (Design-First & Code-First), schema modeling, reusable components, security, and real-world documentation practices for building scalable and well-documented RESTful APIs.

Worry about developing only your application's business rules. Extend this core API in Typescript to manage users, projects and payment plans. The design of this project was based on the principles of clean architecture and Domain-Driven Design (DDD)

A simple fastify API using design-first approach

Definition-driven development is the approach where a clear and well-defined understanding of project requirements and goals guides the entire development process. This approach emphasizes the importance of creating a detailed specification or definition of the project before initiating any coding or implementation.

open-api code generation in go

Newsflash from DataJourneyHQ

Hackolade(https://hackolade.com) plugin for GraphQL schema SDL

The compiler for FrameLab — a design-first language that compiles executable design systems into production UI.

Apidog is a complete set of tools that connects the entire API lifecycle, helping R&D teams implement best practices for API Design-first development.

FrameLab is a design-first language where design systems become executable and compile into production UI.

A microservices-based subscription billing system built with NestJS, Prisma, and PostgreSQL.

A zero-dependency AI coding workflow template. Prevents LLM context collapse and architectural drift by separating long-term design from ephemeral tasks.