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gstack

Garry Tan's open-source Claude Code setup that transforms a single AI coding assistant into a full virtual engineering team. Includes 15+ opinionated slash-command skills acting as CEO, Eng Manager, Designer, QA Lead, Release Engineer, and more for high-velocity software development.

Overview

gstack is an open-source collection of highly opinionated skills (slash commands) created by Garry Tan (President & CEO of Y Combinator). It turns Anthropic's Claude Code — the agentic coding CLI — into a complete virtual software engineering organization.

Instead of using generic prompts, gstack provides role-based workflows that encode Garry's proven process for shipping production code at high velocity (often 10k+ lines per week). The skills act as CEO, Engineering Manager, Designer, paranoid Code Reviewer, QA Lead (with real browser automation), Release Engineer, Doc Engineer, and more.

Key Features

  • Role-Based Slash Commands: /plan-ceo-review, /eng-review, /code-review, /ship, /browse (Playwright-powered QA), /retro, and many others.
  • Virtual Team Structure: CEO rethinks the product vision, Eng Manager locks architecture, QA opens a real browser to test changes, Security runs OWASP/STRIDE audits.
  • One-Command Workflows: From idea to shipped PR with structured planning, review, testing, and release.
  • Browser Automation & Real QA: Diff-aware route testing using Playwright and a local daemon.
  • Multi-Agent & Cross-Platform: Works with Claude Code, and extended support for other agents supporting the SKILL.md standard (Codex, Gemini CLI, etc.).
  • Easy Installation: One-line setup that clones skills into ~/.claude/skills/ or per-repo .agents/skills/.

Installation

# Global user install (recommended)
git clone https://github.com/garrytan/gstack.git ~/gstack
cd ~/gstack && ./setup

# Or per-repository install
git clone https://github.com/garrytan/gstack.git .agents/skills/gstack
cd .agents/skills/gstack && ./setup --host codex

After setup, simply type slash commands like /plan-ceo-review inside Claude Code.

Use Cases

  • Solo developers or small teams wanting enterprise-grade process without hiring a full team
  • High-velocity prototyping and shipping (startups, indie hackers, YC companies)
  • Structured product planning and ruthless prioritization
  • Production-grade code review, QA, and release workflows with real browser testing
  • Learning advanced AI agent orchestration patterns from one of the best operators in tech

Why gstack?

As Garry Tan puts it: "Same person. Different era. The difference is the tooling." gstack is his exact daily driver — now fully open source under MIT license.

It has rapidly gained tens of thousands of stars and is praised for encoding real operator mindset rather than generic templates.

Links

  • GitHub: https://github.com/garrytan/gstack
  • Often discussed alongside tools like OpenClaw for advanced agentic development

Go build something.

Tags

claude-codeai-agentskillsslash-commandsclaudeanthropicdeveloper-toolsworkflowceo-reviewqa-automationopen-source