GitHub SpecKit

An open source toolkit for Spec-Driven Development that transforms natural language requirements into executable AI coding workflows.

GitHub SpecKit replaces unstructured vibe coding with a rigorous, four step workflow: Specify, Plan, Tasks, and Implement. By using the Specify CLI and custom slash commands (like /speckit.specify and /speckit.plan), developers establish a project constitution and living specifications that serve as the ground truth for AI agents. This framework integrates with GitHub Copilot, Claude Code, and Gemini CLI to ensure that generated code adheres to specific architectural constraints and business logic. It effectively moves the development focus from manual implementation to high level intent, reducing technical debt and streamlining complex greenfield or brownfield projects.

https://github.com/github/spec-kit