> ## Documentation Index
> Fetch the complete documentation index at: https://kindling.birklid.com/llms.txt
> Use this file to discover all available pages before exploring further.

# gstack

> Garry Tan's Claude Code setup — 23 agent skills that form a virtual engineering team covering design, eng management, QA, and release.

<div style={{display: "flex", gap: "8px", marginBottom: "1.5rem", flexWrap: "wrap"}}>
  <Badge>Open Source</Badge>
  <Badge color="#F97316">Applications Layer</Badge>
</div>

# gstack

**Y Combinator's Garry Tan open-sourced his Claude Code setup: 23 skills that turn one developer into a full engineering team.**

<Frame>
  <img src="https://mintcdn.com/tumbleweedlabs/QT0SlrwbzlJBSMcS/images/og-gstack.png?fit=max&auto=format&n=QT0SlrwbzlJBSMcS&q=85&s=79b2514b6a4f15034e1fac100d10dc06" alt="gstack GitHub" width="1200" height="600" data-path="images/og-gstack.png" />
</Frame>

<CardGroup cols={4}>
  <Card title="Type" icon="code-branch">Open Source (MIT)</Card>
  <Card title="Stack Layer" icon="browsers">Applications</Card>
  <Card title="Language" icon="code">TypeScript</Card>
  <Card title="Stars" icon="star">91.9k+</Card>
</CardGroup>

## What it is

gstack is an open-source "software factory" that structures Claude Code into a virtual engineering team. Its 23 skills correspond to roles: CEO (product direction), Designer, Engineering Manager, Release Manager, Documentation Engineer, and QA Lead. Workflows follow a sprint loop — Think → Plan → Build → Review → Test → Ship → Reflect — triggered through slash commands, with each stage producing structured Markdown artifacts.

Created by Garry Tan, president of Y Combinator, and released in early 2026, gstack rapidly became one of the most-starred Claude Code skill collections on GitHub. It integrates with real browser automation via Chromium and works alongside other AI coding tools including Cursor and OpenAI Codex. The pitch: one builder shipping with the velocity of a 20-person team.

<Tip>
  **Use this when** you're a solo founder or small team and want structured, role-aware AI assistance — not just code generation, but the full sprint cycle from planning through QA and release notes.
</Tip>

## Get started

<CardGroup cols={2}>
  <Card title="GitHub ↗" icon="github" href="https://github.com/garrytan/gstack">
    Source, installation, and sprint workflow docs.
  </Card>
</CardGroup>

## Related tools

<CardGroup cols={2}>
  <Card title="Matt Pocock's Skills" icon="github" href="/library/skills/matt-pocock-skills">
    Engineering-focused skills: TDD, diagnosis, architecture, doc grounding.
  </Card>

  <Card title="Karpathy Skills" icon="github" href="/library/skills/karpathy-skills">
    Behavioral constraints that keep Claude minimal and goal-driven.
  </Card>
</CardGroup>