GitHub just dropped a tool that does something radical in the age of vibe coding: it makes you think before you build. Spec Kit, an open-source toolkit released under the MIT license, introduces what GitHub calls spec-driven development, or SDD, a workflow that requires developers to write detailed specifications, technical plans, and task breakdowns before any AI agent touches a line of code.
The toolkit works with over 30 AI coding agents, including GitHub Copilot, Claude Code, and Gemini CLI, and operates through straightforward CLI commands and slash commands.
How Spec Kit actually works
The workflow starts with commands like specify init, which sets up the specification framework for a project. From there, developers document requirements with enough granularity that an AI agent can follow them predictably, reducing the kind of hallucinated logic and structural drift that plagues unguided AI code generation.
Community reception and ongoing development
