GStack

Garry Tan—yes, THE Garry Tan, CEO of Y Combinator, the guy who turned Sequoia into an AI powerhouse and wrote the YC AI grant check that convinced half of Silicon Valley AI wasn't a scam—just open-sourced his entire Claude Code setup. It's called GStack, and it's exactly what it sounds like: his personal 15-tool workflow for getting AI to do the work of an entire engineering org. CEO, Designer, Eng Manager, Release Manager, Doc Engineer, QA—all in one prompt stack.

This isn't some half-baked side project. This is the exact setup Tan uses to run YC, one of the most influential machines in tech. He's essentially saying "here's how I use Claude Code to replace six different roles" and dropping it on GitHub for anyone to clone. It's opinionated, it's battle-tested, and it's completely free. Want to build faster? Stop writing code manually and start using the setup from the guy who funds the startups building the future.

Open-source projects rarely come with this kind of credibility. When the CEO of Y Combinator releases his AI workflow tools, you kind of have to pay attention. GStack is for developers who want to work smarter, not harder—and who better to learn from than the man writing the checks?