Skip to content
csl
All skills

Spec Kit

Workflow

GitHub's CLI for Spec-Driven Development: scaffolds /speckit.* slash commands into Claude Code and 30+ agents.

by GitHubgithub/spec-kit
Stars142.4k
Forks12.7k
Watchers719
Open issues179
LicenseMIT
Last pushtoday

Install

install

$ uv tool install specify-cli --from git+https://github.com/github/spec-kit.git

Update

update

$ uv tool install specify-cli --force --from git+https://github.com/github/spec-kit.git

Re-running with --force upgrades the specify-cli tool to the latest commit; then re-run specify init in your project to refresh the scaffolded /speckit.* commands.

When to use it

  • Starting a new feature or project and you want to define the spec, plan, and tasks before any code is generated
  • You want a repeatable workflow (constitution to spec to plan to tasks to implement) driving Claude Code rather than ad-hoc prompting
  • You need cross-artifact consistency checks (/speckit.analyze) and a clarification pass before implementation
  • You work across multiple AI agents and want a consistent spec-driven process

Commands & flags

specify init my-project --integration claude
Scaffold a new Spec-Driven Development project for Claude Code.
specify init --integration-options="--skills"
Scaffold the workflow as agent skills instead of slash-command files.
/speckit.constitution
Establish project principles before specifying.
/speckit.specify
Describe WHAT to build (the spec).
/speckit.clarify
Resolve ambiguities in the spec.
/speckit.plan
Define the technical approach for the spec.
/speckit.tasks
Break the plan into discrete tasks.
/speckit.analyze
Cross-artifact consistency check before implementing.
/speckit.implement
Execute the generated tasks.

How to use it

Spec Kit is a Python CLI (specify-cli) installed with uv (or pipx) that scaffolds the SDD workflow into your repo, writing /speckit.* slash-command files into .claude/commands/ (or, with --integration-options="--skills", agent skills).

uv tool install specify-cli --from git+https://github.com/github/spec-kit.git
specify init my-project --integration claude
cd my-project

Run the workflow as slash commands inside Claude Code:

  1. /speckit.constitution — establish project principles
  2. /speckit.specify — describe WHAT to build
  3. /speckit.clarify — resolve ambiguities
  4. /speckit.plan — define the technical approach
  5. /speckit.tasks — break the plan into tasks
  6. /speckit.analyze — cross-artifact consistency check
  7. /speckit.implement — execute the tasks

Why it earns its place

GitHub's official, very widely adopted toolkit for Spec-Driven Development, turning Claude Code from ad-hoc prompting into a disciplined constitution-to-spec-to-plan-to-tasks-to-implement pipeline. It ships reusable /speckit.* slash commands so the methodology is enforced directly in the editor rather than living in a doc, and is agent-agnostic (30+ agents) with Claude Code as a first-class integration.

Try it

claude

> /speckit.specify Build a URL shortener with click analytics and per-link expiry