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
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
open-api code generation in go
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.
Hackolade(https://hackolade.com) plugin for GraphQL schema SDL
Newsflash from DataJourneyHQ
The compiler for FrameLab — a design-first language that compiles executable design systems into production UI.
Apiary is an API design and documentation platform, now part of Oracle Cloud Infrastructure. With 486,000+ users and 591,000+ APIs managed, it uses API Blueprint and Swagger/OpenAPI specifications to produce interactive API documentation, mock servers, automated testing, and collaborative API design workflows.
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.
A microservices-based subscription billing system built with NestJS, Prisma, and PostgreSQL.
FrameLab is a design-first language where design systems become executable and compile into production UI.
Connexion is an open source Python framework that automatically handles HTTP requests based on OpenAPI specifications.
A zero-dependency AI coding workflow template. Prevents LLM context collapse and architectural drift by separating long-term design from ephemeral tasks.
Stoplight is a collaborative, design-first API platform providing a visual editor for OpenAPI specifications, interactive hosted documentation, automatic mock servers, API style guides and governance, and open-source tools including Prism (mock server), Spectral (JSON/YAML linter), and Elements (documentation components).
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