docs/index.md
Define what to build before building it — with any AI coding agent.
Spec Kit is a toolkit for Spec-Driven Development (SDD), a methodology that puts specifications at the center of AI-assisted software development. Instead of jumping straight to code, you describe what to build, refine it through structured phases, and let your AI coding agent implement it.
<a href="installation.md" class="btn btn-primary btn-lg">Install Spec Kit</a> <a href="quickstart.md" class="btn btn-outline-primary btn-lg">Quick Start</a>
</div>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.
<a href="quickstart.md" class="pillar-link">Walk through the workflow →</a>
</div> <div class="pillar-card"><span class="pillar-stat">30 integrations</span> — 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.
<a href="reference/integrations.md" class="pillar-link">See all integrations →</a>
</div> <div class="pillar-card"><span class="pillar-stat">91 community extensions</span> (50+ authors), <span class="pillar-stat">18 presets</span>, and growing — including entirely different SDD processes:
Tune the core process with presets, extend it with extensions, orchestrate it with workflows, or replace it entirely. Build and publish your own.
<a href="community/presets.md" class="pillar-link">Browse community presets →</a>
</div> <div class="pillar-card">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.
<a href="installation.md" class="pillar-link">Installation guide →</a> <a href="reference/extensions.md" class="pillar-link">Extensions reference →</a>
</div> </div>200+ contributors power the Spec Kit ecosystem — from core integrations to entirely new development processes. Anyone can create and publish an extension, preset, or workflow.
<div class="stats-grid"> <div class="stat-item"> <span class="stat-number">96K+</span> <span class="stat-label">GitHub stars</span> </div> <div class="stat-item"> <span class="stat-number">200+</span> <span class="stat-label">Contributors</span> </div> <div class="stat-item"> <span class="stat-number">30</span> <span class="stat-label">Integrations</span> </div> <div class="stat-item"> <span class="stat-number">91</span> <span class="stat-label">Extensions</span> </div> <div class="stat-item"> <span class="stat-number">18</span> <span class="stat-label">Presets</span> </div> <div class="stat-item"> <span class="stat-number">4</span> <span class="stat-label">Friends projects</span> </div> </div><a href="community/presets.md">Presets</a> · <a href="community/walkthroughs.md">Walkthroughs</a> · <a href="community/friends.md">Friends</a>
</div>uvx --from git+https://github.com/github/spec-kit.git
specify init my-project --integration copilot
Ready to start? Follow the Quick Start Guide.
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