Spec Kit

Agent PluginsFreeOpen Source

GitHub's spec-driven-development toolkit adding /specify, /plan, /tasks, /implement slash commands to Claude Code and 30+ agents.

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🛡️ AgentReady threat assessment

MAESTRO 7-layer threat model + OWASP AIVSS risk score for Spec Kit, derived from its capabilities.

AIVSS 7.9 · High

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Overview

Spec Kit is GitHub's open-source toolkit for Spec-Driven Development. Its Specify CLL bootstraps a project with SDD scaffolding and installs slash commands (Spec -> Plan -> Tasks -> Implement) for the chosen agent, each phase producing a Markdown artifact feeding the next. It works with 30+ AI coding agents including Claude Code, adding a structured command set and templates rather than ad-hoc prompts.

Key features

/specify, /plan, /tasks, /implement command workflow
Specify CLI project scaffolding
Rich templates + quality checklists
Cross-artifact analysis, 30+ agent support

Use cases

Spec-first development of mission-critical features
Structured, reviewable AI-assisted implementation