Spec Kit
GitHub's spec-driven development toolkit, run as /speckit-* skills so agents follow a structured SDD process.
Test results
Run with our skill harness: the skill alone in a throwaway project, invoked by name, and the real output file checked. Skills are tested in Claude Code and Cursor only so far.
| Client | Result | Last passed | What we checked |
|---|---|---|---|
| Claude Code 2.1.296 (Claude Code) | Passed Tested 2026-10-27 | 2026-10-27 | spec-kit: {'specs/*/spec.md': True, 'token': True, 'FR-00x requirements': True, 'user scenarios': True, 'mentions yearly $180': True}; file=specs/001-tea-subscription-signup/spec.md |
| Cursor 2026.10.22-27dcf5f | Passed Tested 2026-10-27 | 2026-10-27 | spec-kit: {'specs/*/spec.md': True, 'token': True, 'FR-00x requirements': True, 'user scenarios': True, 'mentions yearly $180': True}; file=specs/001-tea-subscription-signup/spec.md |
Skill version: github.com/github/spec-kit @ 67e0f729 (2026-10-23).
Get it
The skill’s files and install instructions are in its repository: github.com/github/spec-kit.