github/spec-kit

What is it?

Key features

• 01Spec-Driven Development workflow from constitution through plan, tasks, implementation, and convergence.
• 02Bug-fixing extension that assesses cause, applies a scoped fix, and records verification.
• 03Idea-assessment extension that produces a go, needs-clarification, or kill decision.
• 04Integrations for switching between coding agents, with GitHub Copilot as the example.
• 05Extensions, presets, workflows, and bundles for customizing or sharing processes.
• 06Community and private catalogs for discovering and hosting components.

Use cases

• Turning a feature idea into a specification, plan, and implementation with an AI coding agent.
• Diagnosing and verifying a bug fix with recorded reports before merging.
• Deciding whether a product idea deserves engineering investment before writing code.
• Packaging approved templates and standards for an engineering team to reuse across projects.

Quick start

1. 1

   Install the Specify CLI with uv

   uv tool install specify-cli
2. 2

   Create a project for GitHub Copilot

   specify init my-project --integration copilot
3. 3

   Enter the project directory, then launch your coding agent there and run the spec-driven skills in its chat

   cd my-project

Things to know

• !Requires Python 3.11+ and the uv tool to be installed first.
• !Workflows depend on a supported AI coding agent and its chat interface.

Topics

FAQ

What is spec-kit?

An open source toolkit that gives AI coding agents structured spec-driven processes, templates, and documented outcomes for building features, fixing bugs, or assessing ideas. Spec Kit helps developers work with AI coding agents through explicit specifications rather than ad hoc prompts. Its core is Spec-Driven Development: you define what to build and why, then the agent turns that specification into a plan, tasks, and working code, with commands for implementing and converging the result. Bug fixing and idea assessment are offered as separate entry points, the former adding assess, fix, and test stages that end in a verdict of verified, partial, or failed.

Is spec-kit free to use? What license does it have?

spec-kit is open source under the MIT license. Check the license terms before using it in commercial products.

Is spec-kit still maintained?

Actively maintained. The last commit to spec-kit was on Oct 21, 2026.

What can I use spec-kit for?

Turning a feature idea into a specification, plan, and implementation with an AI coding agent. Diagnosing and verifying a bug fix with recorded reports before merging. Deciding whether a product idea deserves engineering investment before writing code. Packaging approved templates and standards for an engineering team to reuse across projects.

How do I install spec-kit?

Install the Specify CLI with uv: uv tool install specify-cli Create a project for GitHub Copilot: specify init my-project --integration copilot Enter the project directory, then launch your coding agent there and run the spec-driven skills in its chat: cd my-project

Where can I get spec-kit?

The source code and installation instructions are on GitHub: https://github.com/github/spec-kit