spec-driven development for AI coding assistants
OpenSpec is a spec-driven development (SDD) framework for AI coding assistants that lets users write markdown specs with scenarios and manage a review-then-implement workflow via a CLI.
Solves the same problem with a different architecture or at a different layer. Expect to rewrite the integration.
a spec-driven system using meta-prompting and context engineering instead of artifact-guided specs.
A powerful meta-prompting, context engineering and spec-driven development system that enables agents to work for long periods of time autonomously without losing track of the big picture
an MCP server that exposes SDD workflow tools with a dashboard, for MCP-based agents.
A Model Context Protocol (MCP) server that provides structured spec-driven development workflow tools for AI-assisted software development, featuring a real-time web dashboard and VSCode extension for monitoring and managing your project's progress directly in your development environment.
a spec-driven coding harness with built-in agents and memory, a heavier all-in-one.
Your AI forgets. This remembers. Spec-driven coding harness for vibecoders, product owners, CEOs and real builders — self-improving context memory, 15 agents, 33 skills working with /goal, agent-team, & workflow on autopilot loops with 0 need for human gate. Kills context rot, ships features, not spaghetti. Claude Code & Codex. Any stack
a lightweight Rust-based spec-driven development framework.
Lightweight, flexible Spec-Driven Development (SDD) for modern AI-powered development
an official GitHub starter toolkit for spec-driven development.
💫 Toolkit to help you get started with Spec-Driven Development
An earlier or more limited way to do the job. Still the right call when you need something small, proven, or CPU-only.
a narrower helper for writing specs and injecting codebase standards, not a full SDD lifecycle.
Agent OS is a system for injecting your codebase standards and writing better specs for spec-driven development.
the previous generation of gsd-2, archived and limited to Claude Code.
A light-weight and powerful meta-prompting, context engineering and spec-driven development system for Claude Code by TÂCHES.
a harness for the implementation phase after specs are approved, not the full spec lifecycle.
Turn approved specs into long-running autonomous implementation. A minimal, adaptable SDD harness with Agent Skills for Claude Code, Codex, Cursor, Copilot, Windsurf, OpenCode, Gemini CLI, and Antigravity.
These projects were analysed and named OpenSpec among their alternatives. The relationship is not symmetric — how OpenSpec rates them is a separate judgement, made when OpenSpec is analysed in its own right.
calls OpenSpec “MIT-licensed TypeScript toolkit for spec-driven development with any AI agent; pick it if you prefer TypeScript over Python.”
💫 Toolkit to help you get started with Spec-Driven Development
calls OpenSpec “Choose as a drop-in TypeScript spec-driven development CLI for AI coding assistants.”
Agent OS is a system for injecting your codebase standards and writing better specs for spec-driven development.
calls OpenSpec “When you want a dedicated spec-driven development tool for AI assistants rather than a full lifecycle skills pack.”
Production-grade engineering skills for AI coding agents.
calls OpenSpec “Spec-driven development (SDD) alternative; choose if you prefer specification-first workflows.”
Context engineering is the new vibe coding - it's the way to actually make AI coding assistants work. Claude Code is the best for this so that's what this repo is centered around, but you can apply this strategy with any AI coding assistant!
calls OpenSpec “Pick it if you only need the spec format/standard for interoperability; it lacks GSD's meta-prompting and context layers.”
A powerful meta-prompting, context engineering and spec-driven development system that enables agents to work for long periods of time autonomously without losing track of the big picture