About this project
Anthropic Spec Kit is the home of spec-driven development — the methodology where a written specification drives planning, task breakdown, and implementation. This site collects the methodology, annotated templates, training, and the coming template marketplace in one place.
Why this exists
Software teams have always known that unclear requirements are the most expensive kind of bug. What changed is the arrival of AI coding agents: suddenly, the gap between "what I meant" and "what got built" became the central problem of everyday development, not just a planning-phase concern.
Spec-driven development answers it with an old discipline applied to a new interface. The spec is the contract between human intent and machine implementation. Write it well, review it cheaply, and the build follows.
This project exists to make that discipline teachable and repeatable: a precise methodology, templates you can actually use, training that builds the skill, and eventually a marketplace where the community's best specs are shared.
Anthropic Spec Kit is an independent project. It is not affiliated with, sponsored by, or endorsed by Anthropic. The name reflects the site's focus on specification craft in the age of AI-assisted development — not a corporate relationship.
Where it's going
| Phase | Status | Description |
|---|---|---|
| v1 — Foundations | Live | Methodology, six annotated templates, training curriculum, marketplace waitlist. |
| v2 — Marketplace | Drafting | Community-reviewed template packs, author revenue share, team workspaces. |
| v3 — Validator | Planned | Automated spec linting: checks for verifiable criteria, scope discipline, and section completeness. |
| v4 — Agent integrations | Planned | Machine-consumable spec formats and plugins for popular AI coding assistants. |