gstack: Y Combinator CEO Garry Tan's Open-Source Claude Code Setup That Ships Like a Team

Description and use

gstack is a set of slash commands that turns Claude Code into a virtual engineering team, enabling a single person, YC CEO Garry Tan, to ship 3 services and 40 features in 60 days, while boosting logical code change speed 810× compared to 2013.

Problem

How can a single person ship production services and features at a rate comparable to a team of twenty while running Y Combinator full-time?

Outcome

Tan shipped 3 production services and 40+ features in 60 days part‑time, achieving a 810× increase in logical code change rate compared to 2013, using gstack’s 23 specialist slash commands and 8 power tools.

Workflow

• Run /office-hours and describe what you are building
• Run /plan-ceo-review on any feature idea
• Run /review on any branch with changes
• Run /qa on your staging URL
• Stop there – you will know if this is for you

Evidence

In the last 60 days before the README was written: 3 production services, 40+ shipped features, part-time, while running YC full-time.

Source

gstack turns Claude Code into a virtual engineering team. A CEO who rethinks the product, an eng manager who locks the architecture, a designer who catches AI slop, a reviewer who finds production bugs, a QA lead who opens a real browser, a security officer who runs OWASP and STRIDE audits, and a release engineer who ships the PR.

Source