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

Design-first framework for Go HTTP services. You describe your API once in a small DSL - types, validators, endpoints, errors - and `craftgo gen` produces typed structs, request validation, HTTP handlers, route wiring, and an OpenAPI 3.1 spec

DJHQ smarty pants

A curated collection of complete, decision-driven design documents for software project ideas. Each document is a full architectural plan — written before any code exists — covering the problem, the system, every technology decision with its reasoning, security posture, failure modes, scalability ceiling, and honest limitations.

A Flask REST API that generates random numbers from a configurable discrete distribution — design-first OpenAPI, Dockerized, arc42-documented.

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 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.

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

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

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

Newsflash from DataJourneyHQ

拒绝低质量代码！无论模型大小，都能让AI像资深架构师一样先思考、设计、再编码的极简Prompt模版

The design-first AI workflow for Product Designers who ship. Agent system (RAY · BOB · ANALYZER · EVE · SHIP) for Claude Code — Quality Brief gate, frozen scope, tiered specs. Install: npx pds-stack install

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

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

MCP Design Specification (MCPDS)