Open source · MIT

Spec Kit

GitHub's toolkit for spec-driven development with coding agents.

140k stars on GitHub, Oct 2026

Why it's useful

You write what you want as a spec, then Claude Code, Codex or Copilot plans and builds against it step by step. Stops the agent wandering off on bigger projects.

What it needs

uv (a Python tool installer) and a coding agent such as Claude Code or Copilot

The details

Price: Free
Licence: Open source (MIT)
Runs on: Command line, Windows, macOS, Linux
Made by: GitHub
Category: Coding Agents & MCP

Image: GitHub. Spec Kit belongs to GitHub; we just think it's worth knowing about.

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