Spec Kit

🌱 Spec Kit
    Build with a spec, fix a bug, or assess an idea — with your coding agent.

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Spec Kit is an open source toolkit that gives AI coding agents structured
processes, reusable templates, and documented outcomes. Start with a ready-made
process, customize it, or bring your own.

Choose your process

These are independent entry points, not mandatory phases. SDD ships in core;
bug fixing and assessment are bundled extensions you install when needed, and
the primitives below let you adopt or create other processes.

Capabilities

Spec Kit combines ready-to-use processes with composable mechanisms:

Search the active catalogs with commands such as specify extension search,
specify preset search, specify workflow search, and specify bundle search.
Spec Kit includes community catalogs, and organizations can add their own
curated sources. Catalog listings are not audits or endorsements, so review
community source code before installing or running it.

Get started

You need Python 3.11+, uv,
and a supported AI coding agent on Linux, macOS, or Windows.

Run these commands in your terminal to install Spec Kit and create a project.
This example uses GitHub Copilot.

After installing the Specify CLI and creating your project, launch your coding
agent in the project directory, then choose a process below.

For other setups:

- Installation for pinned releases, other installers, CI, and troubleshooting.
- Existing projects to start with code you already have.
- Other agents for integration keys and invocation syntax.
- Upgrade to update an existing installation.

Spec-Driven Development

Define what to build and why, then turn the specification into a plan, tasks,
and working code.

The minimal flow is shown below. Create a…