### Spec-driven by default The core SDD process ships ready to use: **Spec → Plan → Tasks → Implement**. Define what to build before building it. Rich templates, quality checklists, and cross-artifact analysis come out of the box. Each phase produces a Markdown artifact that feeds the next — giving your AI coding agent structured context instead of ad-hoc prompts. Walk through the workflow →

### Use any coding agent 30 integrations — Copilot, Gemini, Codex, Windsurf, Claude, Forge, Kiro, and more. Switch freely between agents with a single command. No lock-in. Run `specify init` with your agent of choice and Spec Kit sets up the right command files, context rules, and directory structures automatically. If your agent isn't listed, the `generic` integration is an escape hatch for any tool. See all integrations →

### Make it your own 91 community extensions (50+ authors), 18 presets, and growing — including entirely different SDD processes: - **AIDE** — 7-step AI-driven engineering lifecycle - **Canon** — baseline-driven workflows (spec-first, code-first, spec-drift) - **Product Forge** — product-management-oriented SDD - **FX→.NET** — end-to-end .NET Framework migration across 7 phases - **MAQA** — multi-agent orchestration with quality assurance gates Tune the core process with presets, extend it with extensions, orchestrate it with workflows, or replace it entirely. Build and publish your own. Browse community presets →

### Integrate into your organization Works offline, behind firewalls, and on **Windows, macOS, and Linux**. Host your own extension and preset catalogs so your organization controls what gets installed. Community extensions like CI Guard and Architecture Guard add compliance gates and governance that fit the way your team already works. Installation guide →   Extensions reference →