Speck
Claude Code-Native Spec-Driven Development
Speck is a specification-driven development framework that brings GitHub's
spec-kit methodology to Claude Code. It
provides slash commands, a natural language skill, and a CLI to help teams
structure feature development through a disciplined three-phase workflow:
Specify what you're building, Plan how you'll build it, Implement
the plan.
The Workflow
┌─────────────┐ ┌─────────────┐ ┌─────────────┐
│ SPECIFY │ → │ PLAN │ → │ IMPLEMENT │
└─────────────┘ └─────────────┘ └─────────────┘
What? How? Execute
Define what you're building (stakeholder-friendly, technology-agnostic),
design how you'll build it (architecture, contracts, tech stack), then execute
with dependency-ordered tasks.
Features
- Three-phase workflow — Structured specify → plan → implement cycle
inherited from spec-kit
- Claude Code plugin — Native slash commands (
/speck.specify,
/speck.plan, etc.)
- Natural language skill — Ask questions about your specs, plans, and tasks
- Dual-mode CLI — Same commands work in Claude Code and terminal
- Multi-repo support — Share specifications across repositories
- Worktree integration — Work on multiple features in parallel with
automatic IDE launch
- spec-kit compatible — 100% file format compatibility, easy migration
Quick Start
Install the Plugin (2 minutes)
-
Open Claude Code in your project:
claude
-
Open plugin manager:
/plugin
-
Add the marketplace:
- Select "Manage marketplaces" → "Add marketplace"
- Enter:
speck-market
-
Install Speck:
- Select "speck-market" → "speck" → "Install"
Create Your First Spec
/speck.specify Add user authentication with email and password login
Speck generates a structured specification in
specs/001-user-authentication/spec.md with user stories, requirements, and
success criteria.
See the
Quick Start Guide for
detailed setup including optional worktree integration.
Core Commands
| Command | Description |
|---|
/speck.specify | Create or update a feature specification |
/speck.clarify | Resolve ambiguities with targeted questions |
/speck.plan | Generate implementation plan and design artifacts |
/speck.tasks | Break down into dependency-ordered tasks |
/speck.implement | Execute tasks automatically |
/speck.help | Load the Speck skill for Q&A |
See the Commands Reference for
all commands and options.
Speck Skill
In addition to slash commands, ask Speck questions naturally:
What user stories are in this spec?
What's the technical approach in the plan?
What tasks are pending?
Rule of thumb: Skill for questions, commands for actions.
Advanced Features
| Feature | Description |
|---|
| Speck Reviewer | Cluster-based PR reviews with spec awareness — Learn more |
| Multi-Repo | Share specs across microservices or frontend/backend splits — Learn more |
| Worktrees | Work on multiple features simultaneously with IDE auto-launch — Learn more |
| Monorepos | Manage workspace projects with shared specifications — Learn more |
| spec-kit | 100% file format compatible with GitHub's spec-kit — Learn more |
Project Structure
.claude/
├── commands/ # Slash commands (/speck.*)
├── agents/ # Subagents for complex workflows
└── skills/ # Natural language skill